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Old 16th October 2005, 10:43 AM   #1
gtrtech is offline gtrtech  United States
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Default Schematic for a avt20

Anyone know where i can get a schematic for a Marshall Avt20
Thanks
Tony
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Old 17th October 2005, 05:48 PM   #2
Tarzan is offline Tarzan  Belgium
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Hi, MAil Marshall and ask for it.
Cheers,
Zilog
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Old 18th October 2005, 04:36 AM   #3
DrSound is offline DrSound  Israel
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Tony, send me your e-mail to al_si at netvision dot net dot il.
I will help you.
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Old 19th October 2005, 12:11 AM   #4
Enzo is offline Enzo  United States
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I got him last night.
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Old 19th October 2005, 01:44 PM   #5
gtrtech is offline gtrtech  United States
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Thanks anyway Dr sound, and thanks Enzo they are just what I needed. Now if I can just figure out how to replace that gain button with a footswitch jack.
Tony
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Old 20th October 2005, 07:32 AM   #6
Enzo is offline Enzo  United States
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That is a DPDT switch, and it makes changes in two points in the circuit. Remove the switch and wire a small DPDT relay in its place. COntrol the relay remotely with a footswitch.
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Old 21st October 2005, 01:56 PM   #7
gtrtech is offline gtrtech  United States
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Thanks again Enzo, I was thinking of something like that, Maybe using a dim connector, BTW you wouldnt have the parts layout to would you?
Tony
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Old 22nd October 2005, 06:02 AM   #8
Enzo is offline Enzo  United States
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You have everything the factory provides us service centers. Parts identifiers should be silkscreened on the board.

Since it is just a relay, find some DC voltage in there and run the relay off it. Just run a simple footswitch to ground. DC to hot side of coil, FS to low side to ground it. A basic 1/4" jack and a one button switch will work fine. if you use a DIN plug or something, then your FS becomes custom and you will not be able to grab a switch from another amp when this one breaks.
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Old 25th October 2005, 12:45 AM   #9
gtrtech is offline gtrtech  United States
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Enzo, Thanks for all your help, that sounds alot easier.
Tony
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Old 2nd November 2005, 06:40 PM   #10
gtrtech is offline gtrtech  United States
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Enzo
I was also wondering, when I go from Clean to Dirty the volume jumps way to much. any advice on what I can do.
Thanks
Tony
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