Bare Knuckle Pickups Forum
Forum Ringside => Tech => Topic started by: tomjackson on August 24, 2008, 06:45:24 PM
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Hi,
Is it possible to reduce the power of a VC30 be removing 2 of the EL84's?
Or is there a mod that can reduce the power by removing 2 of the output valves?
Cheers
Tom
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"Super-awesome tube-pulling thingamajig for the VC30 By MrCarrot
Say the tubes are aligned like this from left to right, looking in straight from the back:
X X X X
You can pull any of these combinations, O will show no tube.
O X O X
X O X O
X O O X
O X X O
Also, make sure to set the impedance switch to 4 ohms when using an 8 ohm load with it.
Mine is currently set to O X O X. I've also done X O X O safely. I've not tried the others although I hear they are safe, but may as well stick with what you know is safe."
Taken from http://ultimate-guitar.com/forum/showthread.php?t=821044
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"Super-awesome tube-pulling thingamajig for the VC30 By MrCarrot
Say the tubes are aligned like this from left to right, looking in straight from the back:
X X X X
You can pull any of these combinations, O will show no tube.
O X O X
X O X O
X O O X
O X X O
Also, make sure to set the impedance switch to 4 ohms when using an 8 ohm load with it.
Mine is currently set to O X O X. I've also done X O X O safely. I've not tried the others although I hear they are safe, but may as well stick with what you know is safe."
Taken from http://ultimate-guitar.com/forum/showthread.php?t=821044
do this at your own peril, the amp is cathode baised and the usual 'pulling valves and halfing the impedance setting' applies to fixed biased amps.
I would not advise you to pull EL84s on this amp.