Bare Knuckle Pickups Forum

Forum Ringside => Guitars, Amps and Effects => Topic started by: Twinfan on August 31, 2007, 12:39:19 AM

Title: Any JTM45 users round here?
Post by: Twinfan on August 31, 2007, 12:39:19 AM
I'm probably going to be buying a JTM45 clone in the near future and wondered if anyone else round here has one?  Something in the tone of it just spoke to me.

I think with one of those and a couple of pedals I'll be in tone heaven...
Title: Any JTM45 users round here?
Post by: Woogie on August 31, 2007, 12:55:21 AM
ANGUS YOUNG!! Get it!!

The glassy tone is immense.

You looking at original or reissue?
Title: Any JTM45 users round here?
Post by: LazyNinja on August 31, 2007, 01:02:50 AM
Be sure to check out Ceriatone's version of the amp. Just under $1000 inc shipping for a fully assembled PTP handwired amp. I want their Plexi 50.
Title: Any JTM45 users round here?
Post by: hunter on August 31, 2007, 06:10:52 AM
Check out the Cornell 45/50, which can give you both flavours, the JTM45 which is closer to Bassman as well as the JMP50 which has more of the Marshall crunch (selectable rectifiers).

It's pricey but as far as I know the best Plexi clone out there at reliable quality (unless you're lucky and find a good vintage one).

Suhr Badger is interesting as well in that league but tonally different I think.
Title: Any JTM45 users round here?
Post by: Twinfan on August 31, 2007, 08:53:29 AM
It's a Ceriatone kit that this particular amp was built from by a local electrical engineer.  I've seen the insides and believe me, this guy can solder!  It's art.  Plus it has a few upgraded bits like carbon-comp resisters and some Sozos.

I tried his Marshall 18w/36w clone too and I preferred the JTM45.  Not as much crunch from the amp, but that's what pedals are for right?  Plus the cleaner JTM tone was much sweeter to my ears.

I'm thinking one of my Mule'd Les Pauls might sound a bit tasty through it...
Title: Any JTM45 users round here?
Post by: Twinfan on September 02, 2007, 02:01:08 PM
Well it looks like the deal is done.  I'm trying the JTM45 again on Tuesday or Wednesday just be sure, then the guy wil be building me a cabinet for the head.  It'll be in black tolex, with black corners, white panels and chicken head knobs   8)

Tone City please driver, and step on it...
Title: Any JTM45 users round here?
Post by: hunter on September 02, 2007, 02:18:38 PM
You gotta give us clips, I've been interested in those Ceriatones for a long time.
Title: Any JTM45 users round here?
Post by: Twinfan on September 02, 2007, 03:01:14 PM
I'll see what I can do Hunter - although my clip recording gear isn't the best I'm afraid  :(

This amp should be even better than the regular kits due to the cap upgrades it's had, although I believe it still has the original Ceriatone transformers which some people swap.

It's got JJ ECC83 and Sovtek KT66 valves which are the better newly produced ones knocking about.

I've got some old Brimars I may stick in the preamp though, and I'm thinking of getting some Valve Art KT66s   :twisted:
Title: Any JTM45 users round here?
Post by: 5F6-A on September 02, 2007, 09:40:25 PM
I hope yours will sound good.
This is a photo and  clip of mine with the Heritage "budget" LP with "boutique" P/us ....


(http://i46.photobucket.com/albums/f103/walter_w/CIMG6215.jpg)

The clip is here:


http://www.esnips.com/doc/838bdc7e-dbad-44cf-925a-3b8c5a258400/HERITAGE-1



Specs:
- JTM45 ( 5F6-A ) clone amp with a couple of Plexi era twists
- Made by the same guy who builds the amps for Carl Martin
- Hand wired, all point-to-point using terminal strips a là Hiwatt
- Combination of TAD Mustard, Sozo and Auricaps coupling caps
- Valves; 2 x KT66 GEC, 2 x Mullard ECC83, 1 Philips ECC83 with matched triodes for the PI, 1 x Philips GZ34. Naturally all NOS .
- Parallel FX loop with mixing pot and gain reduction switch
- Cathode bias operation switch
- Master volume pot
- Obsolete Electronics JTM45 repro output transformer wired for 16 ohms.
- Black Tolex covered
- 2 x 12” semi-closed cabinet, same tolex as head with two handles a là vintage VOX and BluesBreaker grille cloth.
- Weber Blue Dog and Silver Bell alnico speakers. 12”.
- Only the best components available used.
Title: Any JTM45 users round here?
Post by: Twinfan on September 02, 2007, 10:02:33 PM
Lovely tone  :)

I've not heard a bad JTM45 clip yet.  Can't wait to get the amp now   :P
Title: Any JTM45 users round here?
Post by: WezV on September 02, 2007, 10:35:33 PM
stop it!!! i have just got a new amp - now is not the time for AmpAS
Title: Any JTM45 users round here?
Post by: Twinfan on September 02, 2007, 10:44:31 PM
Sorry Wez   :lol:
Title: Any JTM45 users round here?
Post by: HTH AMPS on September 03, 2007, 12:20:07 AM
The clean tone from a JTM45 is just gorgeous - the best Marshall clean tone ever imo.  They do a mean crunch tone as well, apparently  :wink:

 :twisted:
Title: Any JTM45 users round here?
Post by: hunter on September 03, 2007, 06:27:16 AM
Quote from: 5F6-A
The clip is here:


http://www.esnips.com/doc/838bdc7e-dbad-44cf-925a-3b8c5a258400/HERITAGE-1



Maybe I'm dumb but I can't see any mp3s behind this link. Maybe because I'm on a mac?  :cry:
Title: Any JTM45 users round here?
Post by: 5F6-A on September 03, 2007, 09:57:07 PM
Quote from: hunter
Quote from: 5F6-A
The clip is here:


http://www.esnips.com/doc/838bdc7e-dbad-44cf-925a-3b8c5a258400/HERITAGE-1



Maybe I'm dumb but I can't see any mp3s behind this link. Maybe because I'm on a mac?  :cry:


The song should start stright away after clicking on the link... uhmm.....
Title: Any JTM45 users round here?
Post by: horsehead on September 04, 2007, 08:01:25 AM
I can't see you goiung wrong with one of these Twin, a JTM45...too me... is the classic rock sound & these Ceriatone kits sound like the bees knees
Title: Any JTM45 users round here?
Post by: Twinfan on September 04, 2007, 08:24:11 AM
Quote from: horsehead
I can't see you goiung wrong with one of these Twin, a JTM45...too me... is the classic rock sound & these Ceriatone kits sound like the bees knees


Cheers Horsey.  I've been llistening to loads of clips of JTM45s and I really think it's the sound I'm looking for.  Early Angus, ZZ Top, Jimi, SRV - there's elements of all of them in there.

Damn this waiting...
Title: Any JTM45 users round here?
Post by: Will on September 04, 2007, 09:28:52 AM
whats the cost of those things fully assembled?
Title: Any JTM45 users round here?
Post by: hunter on September 04, 2007, 09:31:42 AM
Quote from: Twinfan

Cheers Horsey.  I've been llistening to loads of clips of JTM45s and I really think it's the sound I'm looking for.  Early Angus, ZZ Top, Jimi, SRV - there's elements of all of them in there.

Damn this waiting...


You're such a big fan of the Shiva sound, so I was thinking if you wouldn't be better off selling all your current amps plus the money you intend to spend on the JTM and get a Shiva instead?
Title: Any JTM45 users round here?
Post by: Twinfan on September 04, 2007, 10:15:04 AM
A good point Hunter, but I don't want to spend Shiva money on one amp.  Much as I like the sound of it, I find Bogner prices just too much at £1400.  Plus I think it looks rubbish   :oops:

I think a good JTM45 with a pedal or boost can do a lot of what the Shiva can.
Title: Any JTM45 users round here?
Post by: Twinfan on September 04, 2007, 10:18:46 AM
Quote from: Will
whats the cost of those things fully assembled?


Check out http://www.ceriatone.com

It's around $1000 for the complete amp built by Ceriatone, a cabinet and shipping.  So that's around £500 plus import duty.
Title: Any JTM45 users round here?
Post by: Prawnik on September 06, 2007, 04:05:54 PM
Everybody help me out here and get Nik to build a Silverface Fender Super Reverb clone (most.underrated.amp.ever) and also something with KT88 tubes.
Title: Any JTM45 users round here?
Post by: Twinfan on September 06, 2007, 06:25:49 PM
Sod that, I want him to start making a JTM45/100 kit with four KT66s   :twisted:

Should have my JTM45 in a couple of weeks.  I'll get some pics up when I've got it here  :D
Title: Any JTM45 users round here?
Post by: Prawnik on September 07, 2007, 02:33:40 PM
Didn't the old Marshall Major run KT88 tubes in the power stage?
Title: Any JTM45 users round here?
Post by: Twinfan on September 07, 2007, 02:51:03 PM
Yup, certainly did.  Bet that was a loud bugger!
Title: Any JTM45 users round here?
Post by: Prawnik on September 08, 2007, 11:45:29 AM
Quote from: Twinfan
Yup, certainly did.  Bet that was a loud bugger!


Stupid loud, from what I understand, loud to the point of being useless unless you happen to be in Deep Purple or something.
Title: Any JTM45 users round here?
Post by: Twinfan on September 12, 2007, 09:07:54 AM
Well the extra cosmetic "bits" and my KT-66 valves turned up yesterday.  The amp should be finished and ready for collection at the weekend   8)

Oh, and when I pick it up I'm dropping off one of my Klipps to be converted to Marshall Super Bass spec   :twisted:

Knowing a good local amp tech is proving to be a GAS guzzler...
Title: Any JTM45 users round here?
Post by: indysmith on September 12, 2007, 09:20:50 AM
awesome! I expect a full review telling us what you think :P

Those Ceriatones have got me drooling. That DC-30 looks like the sex.
Title: Any JTM45 users round here?
Post by: horsehead on September 12, 2007, 11:53:00 AM
If an amp looks like sex mate you need to get out more :lol:
I expect a full report twin on this kit  :D
Title: Any JTM45 users round here?
Post by: Twinfan on September 12, 2007, 12:06:19 PM
Ics and review will be done  :)

I'll see if I can get a clip or two recorded aswell.
Title: Any JTM45 users round here?
Post by: Brow on September 13, 2007, 10:25:35 AM
God damn this thread  :evil:

I haven't had JTM45 GAS for a while now, but now it's back with a vengeance  :lol:

I may have to look into 1 of these Ceriatone things, a JTM45 Re-issue or a Celtic Edana (great sounding clone of a JTM45).
Title: Any JTM45 users round here?
Post by: horsehead on September 13, 2007, 12:55:30 PM
Quote from: Brow
Celtic Edana (great sounding clone of a JTM45).


whos-a-what-now?
Title: Any JTM45 users round here?
Post by: Brow on September 13, 2007, 06:04:20 PM
Quote from: horsehead

whos-a-what-now?


Celtic Amps - http://www.celticamplifiers.com/ :)
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 12:03:29 AM
Well it's here  :D

(http://i146.photobucket.com/albums/r267/junkacct/Martamp1.jpg)

(http://i146.photobucket.com/albums/r267/junkacct/Martamp2.jpg)

Beeyoooooootiful clean tone at low volumes.  Gorgeous.  I've not had chance to wind up the volume a bit at home, but with an attenuator at the builder's place it sounded fantastic.  I've tried running my ZVex Box of Rock through it and it sounds pretty good.  It really needs to be wound up to a certain level though for all the syrupy goodness to really shine.

I can't believe it's a month to my next gig and no rehearsals inbetween  :(
Title: Any JTM45 users round here?
Post by: HTH AMPS on September 17, 2007, 12:45:22 AM
come on Dave, we want gut-shots.  

btw, if you should happen to have a 'booster' type pedal (as I know you do) then try it into the normal channel and prepare for a serious rawk tone.

 :twisted:
Title: Re :
Post by: viking on September 17, 2007, 04:25:35 AM
Waouh!You're very lucky!I would like so much to hear it! :wink:
Title: Any JTM45 users round here?
Post by: horsehead on September 17, 2007, 06:43:31 AM
That

is

seriously

nice

I'm gassing now...damn you twin! :evil:
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 08:58:00 AM
Cheers guys.  I'll see if I can get you a porn-like gut shot later  ;)

I'm still playing around with settings HTH, but I'll try your booster through the normal channel later.  The normal channel is very dark, but I'll give it a try...
Title: Any JTM45 users round here?
Post by: LazyNinja on September 17, 2007, 11:44:23 AM
I've seen Martamp amps on ebay before didn't know you were buying it off him Dave. I think He was selling an 18W plexi copy for about £250 I wish I had snatched it up then!
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 12:17:19 PM
Yeah, he builds 18w and 36w clones.  With and without tweaks.  He also has a 10w combo he builds.  He's going to lend me his 36w to try sometime.

My main gigging Laney Klipp is currently with him to be converted to Marshall Super Bass spec.

His work is of high quality, his prices are good, and he has a great no-nonsense approach.  Top stuff in my book.  And he's local  :)
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 01:14:26 PM
I forgot to say - the clarity of notes on this amp is superb.  Great note separation rather than the buzzy mush you get on a lot of other amps.

Awesome.
Title: Any JTM45 users round here?
Post by: _tom_ on September 17, 2007, 01:19:58 PM
How does it compare to a GH for rock? I've been wanting a Plexi ever since I got the ACDC discography :P
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 01:33:37 PM
A JTM-45 won't have enough gain for you Tom.  They're more of a blueser's amp with a sweeter tone.  If you want EVH levels of gain and grit then a 36w clone would be a good lower powered option.   Most people prefer that Super Lead 100 "Plexi" tone for rock with loads of build-in gain and edgy bite.

Angus and Malcom have used a whole bunch of amps/speakers over the years:

JTM-45s
JTM-50s
JTM-45/100s
100w Super Leads
100w Super Basses
JMP-50s (with Master Volume)
JMP-100s (with Master Volumes)
200w Majors
Marshall clones eg Wizard amps
Greenbacks
G12Hs
Vintage 30s

Angus tends to use 100w heads for rhythmn and 50 watters for solos.  The 45/50 watters sound a bit sweeter for lead lines.

My ears prefer a smoother, rounder tone with low gain and non-piercing treble.  This is where the JTM-45 shines and it suits my heavy picking style(which adds gain itself).

This also explains why my Klipp is being converted to Super Bass (not Lead) spec...
Title: Any JTM45 users round here?
Post by: horsehead on September 17, 2007, 01:57:15 PM
twin, who put it together for you please?
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 02:38:34 PM
His name's Martin Whelan.  Here's his site:

http://www.martamp.com

Here's a couple of gut shots of my JTM-45 (with old gold panels):

(http://www.martamp.com/images/jtm45.jpg)
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 06:28:53 PM
OK, here's the full "money shot" for HTH and anyone else who's interested:

(http://i146.photobucket.com/albums/r267/junkacct/Guts_full.jpg)

(http://i146.photobucket.com/albums/r267/junkacct/Guts_left.jpg)

(http://i146.photobucket.com/albums/r267/junkacct/Guts_right.jpg)


By the way, an MI Audio Crunch Box with this amp SCREAMS  :twisted:
Title: Any JTM45 users round here?
Post by: horsehead on September 17, 2007, 06:49:30 PM
twin which package did you get please
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 07:46:58 PM
It's a Marshall JTM-45 clone, built to Martin's specs.  It's based on a Ceriatone kit with a couple of minor changes that Martin prefers to have.  Nothing drastic as far as I can gather, and nothing that would alter the tone to any noticeable degree.  It has Ceriatone transformers, JJ ECC83s and GZ34 valves, plus Shuguang KT-66s.

The cabinet was built by Martin and covered in my choice of regular black tolex, metal corners, stainless steel mesh over the venting holes and a silver handle.  I also requested the white panels and the chiecken head knobs.  Everything is customisable for a price.

He basically builds you what you want, although he's going to be introducing some standard models in the near future based on the 18w Marshall design.
Title: Any JTM45 users round here?
Post by: 38thBeatle on September 17, 2007, 08:29:07 PM
That does look terrific and I have been reading the thread and it sounds as if you are pretty pleased with it-great choice.
Title: Any JTM45 users round here?
Post by: Will on September 17, 2007, 08:45:20 PM
you big meany!

I want one of ceriatone's line!
a decent enough bank balance doesn't help, but I think a feline guitar shall be first  :lol:
Title: Any JTM45 users round here?
Post by: HTH AMPS on September 17, 2007, 10:58:40 PM
Smart guy, he's only used carbon comp resistors on V1 and V3 plates (i.e. where there is a large voltage across them).  This is where you get the 'magic' that people associate with CC resistors.

I would have also used them for the plate load on V2a (the 100k on the valve base) and also for 100k cathode resistor on V2b but that's just my preference.

I remember tweaking my AC20 and I really couldn't believe how much the amp opened up when I used CC resistors in place of the CF ones I'd previously used.

Overall I'd say it's a nice neat build.  I always use multiple star grounding over the bus-bar that he's used (and Marshall always used in plexis), but again that's just a personal thing.  I'm just used to keeping grounds together for each node on the HT rail from when I've built high-gain valve amps where it's more critical.

I don't think you can grumble at all with that amp - it's built equal to the Marshall HW series amps I've seen and better than many vintage valve amps I've serviced (Sound City and Simms Watts spring to mind).

 :twisted:
Title: Any JTM45 users round here?
Post by: Twinfan on September 17, 2007, 11:04:17 PM
Cheers HTH.  As you say, he's used carbon comps in the key places for tone and not elsewhere (to keep background noise down).  As you say, lots of things are personal preference and he has done his take on the JTM-45 circuit.  It sounds good to me.

Can't wait to crank it at my next gig through my V30/G12H 4x12  :twisted:
Title: Any JTM45 users round here?
Post by: fps_dean on September 18, 2007, 12:47:23 AM
I rock a 1969 Marshall Major.

I will be rocking a Roccaforte DRRS or possibly a Splawn quickrod sooner or later....

Anything that's like an older Marshall, including older Marshalls gets a thumbs up in my book!
Title: Any JTM45 users round here?
Post by: horsehead on September 18, 2007, 07:46:58 PM
Twin, your a scoundrel & a git...I ended up speaking to Martin today





I hope you know that a wife maybe after you & not in a good way
Title: Any JTM45 users round here?
Post by: Twinfan on September 18, 2007, 10:36:59 PM
Ha ha  :lol:

WHat have you ordered/asked about???
Title: Any JTM45 users round here?
Post by: Brow on September 18, 2007, 11:11:56 PM
Did you order this amp in a kit from the USA and he built it for you and boxed it up etc? Or did he build it from scratch?

I ask because I don't see a JTM45 style amp on his website apart from yours :D
Title: Any JTM45 users round here?
Post by: Twinfan on September 18, 2007, 11:21:20 PM
He'd actually ordered some bits of the JTM-45 kit from Ceriatone in Malaysia (basically the chassis, transformers and circuit board), with a few component tweaks that he wanted.  The rest of the amp parts he either had in stock or sourced locally (other caps, valve bases, fuse holders etc) .  He wanted to try building a JTM-45 for his own experience (there was no order for one) and this amp was his first attempt.

When I first met him he'd built the amp with 6L6s, gold panels, standard Marshall knobs and no cabinet.  He'd used it in rehearsal and decided it wasn't really his thing and he preferred his 36w.  I tried it, liked it, asked him to switch it to KT66s, white panels, chicken head knobs and to build a simple cab for it to my spec.

He now really likes the amp and may build himself another.  And I got the great sounding prototype  :D
Title: Any JTM45 users round here?
Post by: horsehead on September 19, 2007, 06:18:48 AM
Basically the exact same as yours mate with some cosmetic changes, he was knowledgable, funny & really helped me understand which is the best way to go with the amps i.e. I flirted with the idea of 36w but came back to the JTM45


she's gonna kill me!
Title: Any JTM45 users round here?
Post by: Twinfan on September 19, 2007, 09:33:07 AM
Nice one matey.  Sounds good!

The 36w is a great lower powered Plexi, but they just don't do cleans or light crunch.  It's gain all the way.  Great in a rock band, not quite so good if you want a bit more flexibility.

I just dying to crank my '45 up!
Title: Any JTM45 users round here?
Post by: horsehead on September 19, 2007, 10:11:39 AM
so are we! :P
Title: Any JTM45 users round here?
Post by: Twinfan on September 19, 2007, 10:27:48 AM
How long until you get yours?  About a month?
Title: Any JTM45 users round here?
Post by: Brow on September 19, 2007, 10:50:03 AM
You guys need to shut up now about these amps, giving me mega JTM-45 GAS  :twisted:

I may have to give him a call, see what price he'd quote for a JTM-45 with 5881 valves instead of KT88s  :lol:
Title: Any JTM45 users round here?
Post by: Twinfan on September 19, 2007, 11:06:05 AM
It'll be pretty much the same as the other valves I'm sure.

KT88s???
Title: Any JTM45 users round here?
Post by: Brow on September 19, 2007, 11:23:03 AM
Quote from: Twinfan
It'll be pretty much the same as the other valves I'm sure.

KT88s???


I meant KT66s  :lol:  :roll:

Bad day at work and my heads not on the job
Title: Any JTM45 users round here?
Post by: horsehead on September 19, 2007, 12:50:01 PM
Quote from: Twinfan
How long until you get yours?  About a month?


christ mate, I haven't dared speak to the missu yet! She was in a right bad mood last night & I'm gonna have to sell my cornford first (snif, sniff :cry: )
Title: Any JTM45 users round here?
Post by: Twinfan on September 19, 2007, 01:02:35 PM
What's wrong with the Cornford???
Title: Any JTM45 users round here?
Post by: horsehead on September 19, 2007, 01:10:14 PM
Nothing at all, but to raise the cash for this I'm going to have to either hock my body or sell the cornford. I'd prefer not to as it's lovely & one of the early models....unless I can come up with some money out of the blue, or save up for it! I've already got the bitsa going on as well, so I'm pretty much skint at the moment
Title: Any JTM45 users round here?
Post by: Twinfan on September 19, 2007, 01:22:01 PM
If you've got a Cornford, why get the JTM-45?  I would have thought a Cornford does a similar job?
Title: Any JTM45 users round here?
Post by: horsehead on September 19, 2007, 01:32:08 PM
Nah this is the 6 wat harlequin bud
Title: Any JTM45 users round here?
Post by: Twinfan on September 19, 2007, 02:38:06 PM
Gotcha  ;)
Title: Any JTM45 users round here?
Post by: Brow on September 24, 2007, 03:15:45 PM
I've spoken to Martin about these amps too :)

I've enquired as to having 1 built with London power Scaling installed and the price he's quoted is cheaper than a new Marshall JTM45 RI. Now all I have to do is justify it to myself (and find a reason so that my girlfriend doesn't kill me  :roll:  :lol: ) and then it'll be being ordered  :twisted:

And it's all your fault Dave!
Title: Any JTM45 users round here?
Post by: Twinfan on September 24, 2007, 03:43:13 PM
Sorry guys   :oops:  He's got a JTM-45 on the bench at the moment already - must be flavour of the month!

I'm meeting up with Martin next week with my collection of amps to try them out in a rehearsal room (i.e. cranked).  He's bringing his too, plus we're both bringing a few pedals and guitars.  Should be a great evening trying out some top gear  :D

By the way, he's just modded my #1 Laney Klipp ("Brownie") to have a Marshall Super Bass spec pre-amp section (leaving the original Klipp power amp section as it is).  I've christened it the Martaney Super Klipp  ;)

It's a wall shaking MONSTER   :twisted:
Title: Any JTM45 users round here?
Post by: Brow on September 24, 2007, 03:51:10 PM
Quote from: Twinfan
Sorry guys   :oops:  He's got a JTM-45 on the bench at the moment already - must be flavour of the month!


It's not your fault mate. It's well known that us guitarists are fickle  :twisted:

Quote from: Twinfan
I'm meeting up with Martin next week with my collection of amps to try them out in a rehearsal room (i.e. cranked).  He's bringing his too, plus we're both bringing a few pedals and guitars.  Should be a great evening trying out some top gear  :D

By the way, he's just modded my #1 Laney Klipp ("Brownie") to have a Marshall Super Bass spec pre-amp section (leaving the original Klipp power amp section as it is).  I've christened it the Martaney Super Klipp  ;)

It's a wall shaking MONSTER   :twisted:


Sounds like a great night you have planned there mate!

I can't even find someone that sets guitars up in my area, let alone an amp tech that knows his stuff and lets you have jam sessions to try stuff out  :lol:
Title: Any JTM45 users round here?
Post by: _tom_ on October 01, 2007, 03:12:02 PM
These JTM45 clips are awesome, perfect blues rock tone and I bet its even good for hard rock when you boost it - http://www1.gitarrebass.de/magazine/0607/marshall_jtm45.htm
Title: Any JTM45 users round here?
Post by: Twinfan on October 01, 2007, 03:36:42 PM
Yeah, there's some good tone there.  Looking forward to cranking my '45 for the first time tonight  :twisted:
Title: Any JTM45 users round here?
Post by: sgmypod on October 01, 2007, 04:01:31 PM
so any pics of the new beast?
Title: Any JTM45 users round here?
Post by: Twinfan on October 01, 2007, 05:18:43 PM
See pages 3 and 4  ;)
Title: Any JTM45 users round here?
Post by: sgmypod on October 01, 2007, 05:33:37 PM
ahh came in late on this one *L*
Title: Any JTM45 users round here?
Post by: Johnny Mac on October 01, 2007, 08:01:02 PM
I'm a bit late on this one too. Your new amp looks gorgeous TF, the insides just ooze quality!  
Does it nail that Angus and Malcom crunch?
Title: Any JTM45 users round here?
Post by: sgmypod on October 01, 2007, 08:05:05 PM
yeah good question
Title: Any JTM45 users round here?
Post by: Twinfan on October 02, 2007, 08:51:34 AM
Well it got cranked last night   :D

Take one SG
One guitar cable
Input into the high treble channel via the high input
Set the amp to:
Presence = 3
Bass = 3
Middle = 6
Treble = 6
Volume = 7

Did someone say Angus?  ;)

Oh, and the KT-66s glow blue as you play.  How cool is that?????
Title: I ordered one too !!
Post by: hamfist on October 02, 2007, 02:08:23 PM
Hey guys !   Sorry to butt in on this conversation. I was cruising the www this morning (as you do) looking for Jtm45 info, as I have been wanting one, but just couldn't decide between a Ceriatone and one of the Marshall RI's. The Ceriatone is almost certaily a better amp but I was nervous about getting it shipped from Malaysia (or wherever they are), and the lack of aftersales support.
  Anyway, I came upon this thread - wowsers !  I became very interested.
After a couple of emails to Martin at martamps I was very, very interested. I couldn't believe he could produce the amp at the price point that he does. He sure can't make too much money out of it at the moment. Anyway, Martin seems like a top guy. And the long and the short of it is that I ordered a Jtm45 like Twinfan's, with Power scaling !!! All hand-wired, brand new, all for the sum of £730. I am almost wetting myself in anticipation.
  I can't believe that eventually I'm going to get the "amp of my dreams" (cheesy though it sounds).
  Twinfan - Martin said you made some great noise the other night, and that he liked the G12H's the best with the amp - he couldn't quite remember whether it was the heritage's or the anniversary model though ??  
  Anyway, I've got pretty reasonable recording gear, so when it arrives (Nov sometime), I'll defo be putting up some clips ("Back in Black" is likely to feature !).

Alan
Title: Any JTM45 users round here?
Post by: Twinfan on October 02, 2007, 03:04:29 PM
Hi Alan - welcome to the forum!

You made a good choice!  Martin is a top bloke.

We didn't try my JTM45 with G12Hs last night, just my 2x12 with V30s and his 4x10 cab.  It didn't like the pair of V30s as it wasn't giving them enough signal to truly bloom.  We likened the tone of his 10inch speakers to a G12H and that's why I'll be using my G12H Anniversary equipped 2x12 in future with my JTM45.

I also have a 4x12 with an X-pattern of V30s and Heritage G12Hs in that I think will work well.  A 2x12 with a G12H (either type) and a V30 may also be a good choice.  Two V30s alone just give too many mids for a vintage style amp, although they work very well with more modern gear.  The mix of speakers should be better balanced.
Title: Any JTM45 users round here?
Post by: hamfist on October 02, 2007, 03:50:22 PM
I gotcha TF, I obviously misunderstood what Martin was saying.
  I've got a 2x12 cab which I run as a detuned 1x12 with an Eminence Cannabis Rex in it. I plan to start off using that cab with the new '45 and maybe convert it back to a 2x12 (maybe add a G12H30) if I'm not enamoured with how the detuned 1x12 matches with it. I'll just have to see how it goes.

Alan
Title: Any JTM45 users round here?
Post by: sgmypod on October 02, 2007, 03:53:23 PM
Spoke to Martin Twinfan...says he could convert my slave amp to something similar to the jtm45......now what can I sell to fund(car's been a pain today)
Title: Any JTM45 users round here?
Post by: Twinfan on October 02, 2007, 04:27:55 PM
Sounds good matey - you want a shared cathode V1 preamp section  ;)
Title: Any JTM45 users round here?
Post by: horsehead on October 02, 2007, 04:51:38 PM
SG that's exactly what I started doing...can the cornford go...what about the yamaha acoustic...the missus? 8)
Title: Any JTM45 users round here?
Post by: sgmypod on October 02, 2007, 04:53:46 PM
Sorry for my stupidity but what will "shared cathode V1 preamp section" do or is this for the jtm sound
Title: Any JTM45 users round here?
Post by: Johnny Mac on October 02, 2007, 05:34:25 PM
Sounds good TF, Angus's tone is one of the best tones there is, man I'd love to have a go!  :D
Title: Any JTM45 users round here?
Post by: sgmypod on October 02, 2007, 06:28:56 PM
yup kinda the tone I love..shame the jtm30 I had was screwed..oh yeah and didn't sound like a jtm45
Title: Any JTM45 users round here?
Post by: sgmypod on October 02, 2007, 07:07:44 PM
shared cathode V1 preamp section? twin fan
Title: Any JTM45 users round here?
Post by: Twinfan on October 02, 2007, 09:41:36 PM
It's just the way the initial part of the amp circuit is wired.  The alternative is split cathode, which is how the late 60s Super Leads were done.  They have a bit more treble and crunch, and sound like they have a bit more gain because of it.
Title: Any JTM45 users round here?
Post by: sgmypod on October 02, 2007, 09:58:30 PM
Cool something to think about..now do you, want to buy a kidney?
Title: Any JTM45 users round here?
Post by: Henk on October 04, 2007, 03:15:20 PM
After playing for years on my bluesbreaker RI'89, having lend the old plexi of a friend of mine, tried way to much to remember, the greatest 'plexi like' amp i have used is a original jcm800. I dont believe that there is anything that offers this tone and versatility, and still they arent that hard to find for just the amount of cash a new copy-plexi would cost. Watch out for modded ones though.
Title: Re: I ordered one too !!
Post by: Twinfan on November 06, 2007, 11:56:41 AM
Quote from: hamfist
Hey guys !   Sorry to butt in on this conversation. I was cruising the www this morning (as you do) looking for Jtm45 info, as I have been wanting one, but just couldn't decide between a Ceriatone and one of the Marshall RI's. The Ceriatone is almost certaily a better amp but I was nervous about getting it shipped from Malaysia (or wherever they are), and the lack of aftersales support.
  Anyway, I came upon this thread - wowsers !  I became very interested.
After a couple of emails to Martin at martamps I was very, very interested. I couldn't believe he could produce the amp at the price point that he does. He sure can't make too much money out of it at the moment. Anyway, Martin seems like a top guy. And the long and the short of it is that I ordered a Jtm45 like Twinfan's, with Power scaling !!! All hand-wired, brand new, all for the sum of £730. I am almost wetting myself in anticipation.
  I can't believe that eventually I'm going to get the "amp of my dreams" (cheesy though it sounds).

  Anyway, I've got pretty reasonable recording gear, so when it arrives (Nov sometime), I'll defo be putting up some clips ("Back in Black" is likely to feature !).

Alan


For anyone that's interested (apart from Alan of course  ;)) his JTM45 is all built up and ready to go.  Final shakedown tests were performed last night and it's looking and sounding good.  Alan's taking delivery tomorrow  :D

Both Alan's and my amp sounded identical through the same cab, which is good news for those interested in Martamps consistency.

I've also managed to convert Martin himself to my way of thinking.  As he said last night - "The JTM45 is just the perfect amp".

:D
Title: Any JTM45 users round here?
Post by: hamfist on November 06, 2007, 04:08:07 PM
TF,
  I am physically dribbling at the thought of finally getting my hands on the amp and cab tommorow. I hear you gave it a good blasting yesterday !!
   The "meet" is all arranged with Martin. He's been a top bloke throughout the whole thing.
   I'd really like to have heard it through your cab too. I gather it was a fair bit brighter than my new G12-65 Martamp cab. I've got a G12H anniversary I will certainly try instead of one of the 65's at some point. The highs and lows of the "H", with the mids of the 65 might just prove to be a winning combo. As always with speakers, it'll be a case of just trying various ones until I get a match with the amp that I'm happy with. I just thought I'd start off with G12-65's this time as I haven't used them before.

I'll keep you all updated.

Alan
Title: Any JTM45 users round here?
Post by: Twinfan on November 06, 2007, 11:35:25 PM
Yeah, my cab was brighter (1936 Marshall 2x12 with V30/G12H Anniversary mix) and I preferred it.  But then I would, wouldn't I?  ;)

I'm expecting pics and a review sometime tomorrow  :)
Title: Any JTM45 users round here?
Post by: horsehead on November 07, 2007, 06:45:15 AM
OK tomorrow's here....where's the pics :P  :D
Title: Any JTM45 users round here?
Post by: hamfist on November 07, 2007, 07:21:35 AM
Quote from: horsehead
OK tomorrow's here....where's the pics :P  :D


hahaha.  Patience, patience !!!
Title: Any JTM45 users round here?
Post by: horsehead on November 07, 2007, 12:59:48 PM
Just to chime in anyway on the JTM45's, it looks like I'm gonna be getting the  Metropolis JTM45 kit with the mercury magnetic's & sozo upgrades, Martin been really helpful for me & now I've had to join a band just to start getting the money together!
Title: Any JTM45 users round here?
Post by: Twinfan on November 07, 2007, 01:01:15 PM
Nice one - is Martin building it for you then?
Title: Any JTM45 users round here?
Post by: hamfist on November 07, 2007, 04:01:01 PM
Right, I picked up the Martamp Jtm45 and cab from Martin today. Here she is :-

http://www.box.net/shared/tahnglggnd

I can't even play it yet as my wife is asleep upstairs, so I'm resigned to just looking at it for a while.

Alan
Title: Any JTM45 users round here?
Post by: Twinfan on November 07, 2007, 04:08:25 PM
You've got power scaling Alan - keep it low and you can play it  ;)

It sounded good even at whisper levels......
Title: Any JTM45 users round here?
Post by: DeanS on November 07, 2007, 05:07:29 PM
I really want to hear that amp especially with the power scaling set to low volumes  soundclips please CHOP CHOP! :)
Title: Any JTM45 users round here?
Post by: gwEm on November 07, 2007, 05:43:00 PM
come on, this thread blatantly needs clips... and a wormhole to your music room so we can try the thing too ;)

edit: looking at amp sites all afternoon again. man! i want a marshall 18w with cascading channel switch : http://www.youtube.com/watch?v=_v4VzrEbm-o
Title: Any JTM45 users round here?
Post by: 38thBeatle on November 07, 2007, 07:57:24 PM
Nice job!
Title: Any JTM45 users round here?
Post by: FELINEGUITARS on December 07, 2007, 04:45:23 PM
Just found a picture of my old JTM45
I got it for a low price and foolishly sold it when I was hard up about 10 years ago - I have kicked myself many times over that

(http://img.photobucket.com/albums/v662/felineguitars/amps/jtm45002web.jpg)

It was slightly older than me  (serial no 3143) and was supposed to be a bass amp, but did sound rather good with guitar.

To make things worse I also sold an old Sound City 4x12 which had original Celestion G12 speakers in (from about 1967/8) :cry:  :cry:  :cry:
Title: Any JTM45 users round here?
Post by: Twinfan on December 07, 2007, 04:56:36 PM
Doh!  Block logo JTM45 mkII.  '65 to '67ish.

That's worth about £10,000 now....
Title: Any JTM45 users round here?
Post by: indysmith on December 07, 2007, 04:57:40 PM
oh don't make the poor bloke cry. :roll:
Title: Any JTM45 users round here?
Post by: FELINEGUITARS on December 07, 2007, 05:57:04 PM
Quote from: Twinfan
Doh!  Block logo JTM45 mkII.  '65 to '67ish.

That's worth about £10,000 now....


Ouch!

I did wonder - serial number put it at March 1965
Still had all original valves etc
Single speaker jack, Bulgin socket and fuse on white rear panel
2 owners before me- last guy had it since 1969- still had a sticker on the back from Carlsboro sound where he bought it

Think I need to go and lie down
Title: Any JTM45 users round here?
Post by: horsehead on December 07, 2007, 06:27:09 PM
someone make a time machine for feline please 8)
Title: Any JTM45 users round here?
Post by: Kilby on December 07, 2007, 09:35:17 PM
Quote from: FELINEGUITARS
It was slightly older than me  (serial no 3143) and was supposed to be a bass amp, but did sound rather good with guitar.


Dave Gregory ex of XTC always preferred the old Marshall bass amps  for guitar solos (especially when he as doing his Hendrix tribute tracks)

It's amazing the lack of forsight that guitar players have when it comes to selling kit :(

Rob...
Title: Any JTM45 users round here?
Post by: LazyNinja on December 07, 2007, 10:37:05 PM
Quote from: Twinfan
Doh!  Block logo JTM45 mkII.  '65 to '67ish.

That's worth about £10,000 now....


Yup, Musicground had a white panel one from '65 last time I went. They were asking £15000 for it.
Title: Any JTM45 users round here?
Post by: viking on December 07, 2007, 10:54:13 PM
Quote from: LazyNinja
Quote from: Twinfan
Doh!  Block logo JTM45 mkII.  '65 to '67ish.

That's worth about £10,000 now....


Yup, Musicground had a white panel one from '65 last time I went. They were asking £15000 for it.
       And i thought Marshall amps were cheaper in the UK ! :lol:
Title: Any JTM45 users round here?
Post by: horsehead on December 08, 2007, 07:58:37 AM
Andy are you using a 4 x 12" cab with your JTM45 or a 2 x 12" please?
Title: Any JTM45 users round here?
Post by: Henk on December 08, 2007, 08:44:19 AM
Quote from: FELINEGUITARS
(http://img.photobucket.com/albums/v662/felineguitars/amps/jtm45002web.jpg)


Im sorry, im not usually like this BUT

DROOOOOOOOLLLLLLLLLLLLLLLLLL!!!!!!!!
Title: Any JTM45 users round here?
Post by: Twinfan on December 08, 2007, 12:01:30 PM
Quote from: horsehead
Andy are you using a 4 x 12" cab with your JTM45 or a 2 x 12" please?


Andy?  You got my name wrong again?

If you're asking me, I'm using both depending on venue.
Title: Any JTM45 users round here?
Post by: horsehead on December 08, 2007, 05:05:42 PM
serious apologies! I will get it right one day :oops:
Title: Any JTM45 users round here?
Post by: Twinfan on December 08, 2007, 05:27:43 PM
Ha ha!  No problem!

You not bought a JTM45 yet then?
Title: Any JTM45 users round here?
Post by: horsehead on December 08, 2007, 05:32:26 PM
It's geting worse! I keep trying to find ways to fund it, considered selling my motorbike, looks like the cornford is definately going to fund it & I'm trying to sort out a cab as well. Parents are wonderful things when you have no money!
Title: Any JTM45 users round here?
Post by: HTH AMPS on December 08, 2007, 05:39:51 PM
Quote from: FELINEGUITARS
Just found a picture of my old JTM45
I got it for a low price and foolishly sold it when I was hard up about 10 years ago - I have kicked myself many times over that

(http://img.photobucket.com/albums/v662/felineguitars/amps/jtm45002web.jpg)

It was slightly older than me  (serial no 3143) and was supposed to be a bass amp, but did sound rather good with guitar.

To make things worse I also sold an old Sound City 4x12 which had original Celestion G12 speakers in (from about 1967/8) :cry:  :cry:  :cry:


I feel for you man, I sold my '67 plexi to Music Ground for £1600 around four years back.  I still cry when I think of that one, what an amazing amp.

On the good side, my '76 Superbass gets pretty close and everyone that hears it says it's the best Marshall they've ever heard.  Unfortunately for me, I've had a '67 plexi that was f'in amazing.

 :twisted:
Title: Any JTM45 users round here?
Post by: horsehead on December 13, 2007, 03:23:07 PM
Twin/Dave (did I get it right this time?) just a quick question, do you think a 4 x 12" of greenbacks would work well with this amp? I think it would give a nice warm rounded sound, but having never owned a cab or anything like this would appreciate the help
Title: Any JTM45 users round here?
Post by: Twinfan on December 13, 2007, 03:40:26 PM
You got it right mate  ;)

Greenbacks would sound good - nice and warm.  That would have been the original pairing for the amp.
Title: Any JTM45 users round here?
Post by: LazyNinja on December 13, 2007, 03:59:21 PM
horsehead are you getting a Martin to build you a Metro JTM45 kit? Do you know if you'll get charged for customs and VAT for them? How much is it going to cost you altogether? I've heard a few people say you don't get charged for customs or VAT for kit items. Thinking of building a 1987 myself and I heard that Metro's instructions are much better than others.
Title: Any JTM45 users round here?
Post by: horsehead on December 13, 2007, 04:07:29 PM
twin's really the man to ask on this as he's already had the set put together. From what I can remember from Martin though he's got some kind of deal with Ceriatone set-up...I may have that wrong though. From my expreience you'll always get charged import tax etc.
Title: Any JTM45 users round here?
Post by: Twinfan on December 13, 2007, 04:26:20 PM
Anything over about £50 gets charged import tax - guitars/amps/parts/shoes - anything.  To calculate it, it's:

(Cost of item + shipping) x 1.037 x 1.175 + £25 = total cost

which is:

(Cost of item + shipping) + 3.7% import duty + 17.5% VAT + £25 handling fee for the courier/Royal Mail = total cost
Title: Any JTM45 users round here?
Post by: martinw on December 13, 2007, 04:47:14 PM
Speaking hypothetically, if someone was to label a package as "Engineering Sample", then there is only VAT to pay, plus normally about £6 admin in the case of DHL.

Also, the VAT is charged at the stated invoice value, which it might be possible for the sender to make a mistake with....hypothetically. They might put a value of, say $100 on an amp for instance.
Title: Any JTM45 users round here?
Post by: horsehead on December 13, 2007, 04:49:51 PM
ofcourse this is all hypothetical...ahem...get ready for a call soon Martin
Title: Any JTM45 users round here?
Post by: martinw on December 13, 2007, 04:56:14 PM
My prices have sneaked up a little....  :oops:
However, as you spoke to me about it a while back, I'll try to get in or around the prices we talked about  :D  which I can't remember now!

My new day job...oh blimey, there's a story. TF can tell you  :wink: ... is slowing me down a bit now too.
Title: Any JTM45 users round here?
Post by: horsehead on December 13, 2007, 04:59:18 PM
eh up, what you been upto? :lol:
Title: Any JTM45 users round here?
Post by: Twinfan on December 13, 2007, 05:45:29 PM
Martin's been a busy boy now he has a "proper" full time job.  ;)
Title: Any JTM45 users round here?
Post by: horsehead on December 13, 2007, 06:45:54 PM
I for got to ask Dave, how does the 45 work clean in a band enviroment?
Title: Any JTM45 users round here?
Post by: JamesHealey on December 13, 2007, 07:13:07 PM
I will get a 60's plexi at some point, just gotta wait until I inherit a ridiculous amount of money from bill gates in a random selection of his fortune when he dies.
Title: Any JTM45 users round here?
Post by: Twinfan on December 14, 2007, 12:03:39 AM
Quote from: horsehead
I for got to ask Dave, how does the 45 work clean in a band enviroment?


The '45 is great in my blues band.  I use it on about 2 or 3, which is pretty clean, then add pedals for overdrive.  Lovely sweet sound, very Fender-y.
Title: Any JTM45 users round here?
Post by: kluson on December 16, 2007, 08:39:16 PM
Hiya
 I built a metro JTM45 clone. My first build. Went together very well, forum is great many helpful people there

 here's a pic of mine
(http://pic40.picturetrail.com/VOL362/1881120/15963528/250736909.jpg)
(http://pic40.picturetrail.com/VOL362/1881120/15963528/250736625.jpg)

 and here's the guy who designed it playing one

http://www.youtube.com/watch?v=tSmVcxG6SGA
Title: Any JTM45 users round here?
Post by: kluson on December 18, 2007, 11:05:47 AM
Hi Twinfan , play around with rectrifiers and you may find very different levels of sag, which can sound great.
Title: Any JTM45 users round here?
Post by: Twinfan on December 18, 2007, 11:27:18 AM
I can't be bothered!  I'm using a JJ GZ34, JJ ECC83Ss and SHuguang KT-66s at the moment and the amp sounds great.  If it ain't broke why fix it!

My JTM45/100 will be similarly specified.

The only think I'm looking at now is a nice speaker cabinet.  I'm thinking of getting a Matamp.
Title: Any JTM45 users round here?
Post by: kluson on December 18, 2007, 01:30:02 PM
the JJ GZ34's are great, work well and no matter what all the guys on the LPF say , they're very reliable
 I just got some Russian spec Military rectifiers which I've been playing with , even more compression and sag, .... great, work real well with a JTM 45
 Good luck with your build
Title: Any JTM45 users round here?
Post by: 808 on December 19, 2007, 06:31:26 PM
I just listened to this on youtube...sounds killer!

http://youtube.com/watch?v=ucIR00si7nk
Title: Any JTM45 users round here?
Post by: Twinfan on December 19, 2007, 06:36:10 PM
This is a great JTM45 tone - shows it off perfectly:

http://youtube.com/watch?v=tSmVcxG6SGA