Tube Amps / Music Electronics
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|10/4/2000 7:12 PM|
||laney vc-30 schematics|
Do anyone have the schematics of the Laney vc-30 guitar combo. I just bought one and like to do some modification to it...
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|10/6/2000 1:23 PM|
I have 2 of these amps, within 20 serial numbers of each other. Gig with them every weekend, have performed mods and I have the schematics, block diagrams and part lists (from Laney) for both revisions of this amp. Provide me with your mailing address, and Ill make paper copies and send them to you (dont have a scanner and the copies I have are not the most legable).
|10/6/2000 3:26 PM|
Not to dis Paul's offer, but you can find that schematic at the Blue Guitar site; ther is a link to it on the home page of Ampage (right side).
|10/6/2000 7:07 PM|
I modded mine by replacing the ps caps and cathode bypass caps with films. For the output tubes cathode cap I used a panasonic HF.
|10/7/2000 5:44 PM|
The schematics on Blue Guitar site is GC-30V and my amp is vc-30. Or are those amps same?
|10/7/2000 6:28 PM|
||Re: laney vc-30 schematics and more q´s|
I have couple of more Q´s:
can I put two of four el84 away so that it could give only 15 W output.
My VC-30 is changing its output level (=volume) sometimes without thouching the knobs. What seems to be the problem? Is there something wrong with the level pot...?
|10/10/2000 4:29 PM|
||Re: laney vc-30 schematics|
My research (according to my schematics and parts list) indicates that the GC-30 was the first revision of an amplifer with the following characteristics: 4 EL84 power output tubes approx 25 watts output using cathode bias, 3 12AX7A tubes used for preamp and PI, shared EQ controls between clean and drive channels, IC driven reverb and EFX loop. 1 12" or 2 10" speaker configurations. Controls are clean volume, bright switch, drive, drive volume, drive/clean selector switch, treble, middle, bass, reverb, effects. Also has an 4/8 ohm speaker selection switch in the back. Visually the amp is grey tolex and looks a liitle bit like a VOX AC30. The second revision of the very same amp was called the VC-30, it looks the same and uses the same circuits with just a few minor changes. The GC-30 schematic on the Blue Guitar WebSite is exactly the same schematic I have and can be used for the VC-30 as well. In a later post I will note the minor differences between the two. I have 2 GC-30 amps within 20 serial#'s, the first is a 1x12 speaker version, the other is a 2x10 version I also have the matching speaker cabs for each of them, which make them look like small micro stacks. Have made electronic mods primarily to the tone stack and mods to the speaker cabs to increase the bass response. Very pleased with the amps.
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