Username: Password:

Author Topic: Valve Pa as guitar head?  (Read 9488 times)

Twinfan

  • Light Heavyweight
  • ******
  • Posts: 10528
Re: Valve Pa as guitar head?
« Reply #15 on: August 15, 2008, 08:29:46 PM »
I've got a Matamp 4x12 for sale at the moment  ;)

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #16 on: August 15, 2008, 08:30:56 PM »
I know keep looking at it, just can't afford it at mo..would need to sell my marshall 1936 one first...why you selling
« Last Edit: August 15, 2008, 08:36:48 PM by sgmypod »
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee

Twinfan

  • Light Heavyweight
  • ******
  • Posts: 10528
Re: Valve Pa as guitar head?
« Reply #17 on: August 15, 2008, 08:46:43 PM »
I've got two 4x12s, don't actually NEED them both!

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #18 on: August 15, 2008, 08:54:05 PM »
Fair enough whats it sound like is it similar to the new ones
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee

Twinfan

  • Light Heavyweight
  • ******
  • Posts: 10528
Re: Valve Pa as guitar head?
« Reply #19 on: August 15, 2008, 10:37:45 PM »
Yep, the only difference between it and my Martamp is in the speakers and the cosmetics.

HTH AMPS

  • Middleweight
  • *****
  • Posts: 5649
    • HTH AMPS
Re: Valve Pa as guitar head?
« Reply #20 on: August 16, 2008, 01:25:11 PM »
those RSC bird-cage amps are great (I have two). The OTs are pretty poor though and it's money well spent putting a beefier one in there. I've seen them with EL34 and EL84 with GZ34 and EZ81 rectifiers resptively. preamp is typically one EF86 and two ECC83s.

I gutted my EL34 one, changed the OT out, got rid of the GZ34, added a choke, put cathode biased 6V6s in and wired up an AC30 top boost preamp with the tonestack modded to have a mid control.

Its a awesome little amp that I have less than £75 in and can stand shoulder-to-should with amps in the £1000+ range.

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #21 on: August 16, 2008, 03:04:39 PM »
yeah been chasing guy for about 8-9 months to dig it for me.....out of interest how much to clean mod one up(obviously depends on condition)
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee

HTH AMPS

  • Middleweight
  • *****
  • Posts: 5649
    • HTH AMPS
Re: Valve Pa as guitar head?
« Reply #22 on: August 16, 2008, 03:32:58 PM »
yeah been chasing guy for about 8-9 months to dig it for me.....out of interest how much to clean mod one up(obviously depends on condition)

depends what you want doing, but to strip an amp bare and rebuild it is very time consuming. I'd want £200 for labour and small parts, transformers and choke extra - these are really only bargains if you can mod them yourself or have a mate who could help.

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #23 on: August 16, 2008, 03:36:12 PM »
To be honest prob a clean up make a working amp(well yet to try *L*), original spec(maybe trans & choke)
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee

HTH AMPS

  • Middleweight
  • *****
  • Posts: 5649
    • HTH AMPS
Re: Valve Pa as guitar head?
« Reply #24 on: August 17, 2008, 01:30:59 PM »
many of the PA heads have baxendall tonestacks which, imo, makes for a wierd sounding guitar amp. they generally have alot of negative feedback for max headroom, but thats easy to change.

so long as the amp is PTP wired, the scope to easily mod is huge.

my next project (once I'm out of hospital) is to rebuild my Epi VJ with a Marshall 2203 preamp, all PTP wired running any output valve (single ended) from a 6V6 to a KT88 - should be a little beast.

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #25 on: August 17, 2008, 10:14:23 PM »
Yeah sorry only just read you were in hospital....
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #26 on: August 18, 2008, 06:17:54 PM »
http://www.vintagehofner.co.uk/selmer/schematic/p1004.html
here's the schematic...although is exactly same minus valve rectifiers
1 valve per channel
« Last Edit: August 18, 2008, 06:19:45 PM by sgmypod »
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee

HTH AMPS

  • Middleweight
  • *****
  • Posts: 5649
    • HTH AMPS
Re: Valve Pa as guitar head?
« Reply #27 on: August 18, 2008, 08:22:26 PM »
http://www.vintagehofner.co.uk/selmer/schematic/p1004.html
here's the schematic...although is exactly same minus valve rectifiers
1 valve per channel

I cant see the picture on this hospital net connection, PM me in a couple of weeks when I should be back home. I'll have a look at it then and make suggestions on how to get more out of it for guitar.

sgmypod

  • Welterweight
  • ****
  • Posts: 3765
  • Truly bad since 1972
Re: Valve Pa as guitar head?
« Reply #28 on: August 18, 2008, 09:12:42 PM »
yeah think is selling for 65 and has viking on front *L* it should look similar to this

hopefully cleaner(el34s under metal cover at back),
 can't wait to try it..that and the birdcage rsc
« Last Edit: August 19, 2008, 06:32:02 AM by sgmypod »
Autotune My Arse

Crawler,nailbomb & Ltd Ed Emeralds, apache, now riff raff..EX- N/bomb, IT, Mquee