Vox AD50VT parts ?

[gtrplayr1976]

Anyone know what the power selector switch is on the back of this amp ? I have one that needs to be replaced in a friends amp, and don't know how to find the part ,or part #.

Thanks !

[Enzo]

I dunno. I see the power level pot - not a switch - which is a dual 100kB pot. Vox part number for that is V903620017.

They usually clean up for me.

[gtrplayr1976]

I dunno. I see the power level pot - not a switch - which is a dual 100kB pot. Vox part number for that is V903620017.

They usually clean up for me.

Thanks Enzo. I don't have it in hand ,so I wasn't sure if it was a pot ,or switch.

[Fragger]

Watch this youtube at about 6:30. Vox AD50VT Repair for Loud Thump or Pulse.mpg - YouTube

He calls it a dual gang, 100K ohm, linear taper, printed circuit board potentiometer.

[gtrplayr1976]

Watch this youtube at about 6:30. Vox AD50VT Repair for Loud Thump or Pulse.mpg - YouTube

He calls it a dual gang, 100K ohm, linear taper, printed circuit board potentiometer.

It is a dual gang pot. Stereo B100K. Thank you.

[soundguruman]

Anyone know what the power selector switch is on the back of this amp ? I have one that needs to be replaced in a friends amp, and don't know how to find the part ,or part #.

Thanks !

I have those in stock $3 + postage, PM me and send your mailing address.

There are 4 things you should do on this amp:

1. Replace the effects jacks and foot switch jacks. The jacks with normally closed switch contacts. They almost always go bad.
Change them to CLIFF UK jacks. The cliff jack will replace the cheap part, and lasts a lot longer.
Otherwise the audio path is interrupted by corroded contacts....and will be intermittent.

2. Re-solder the entire power amp board. The factory soldering is generally pretty poor.

3. Replace the dual 100K power control. You already got that.

4. Hardware the GROUND connections down to the chassis, with a wire, rig terminal, screw, nut washer.
The ground on this board depends on Plastic Jack Nuts, to hold contacts against the chassis. This is a very poor and unreliable ground scheme.
The metal contact surfaces oxidize, and you lose the ground connection, intermittently.
BYPASS this with wires, and screw the wires to the chassis, so that the grounds will no longer FAIL.

[gtrplayr1976]

I have those in stock $3 + postage, PM me and send your mailing address.

There are 4 things you should do on this amp:

1. Replace the effects jacks and foot switch jacks. The jacks with normally closed switch contacts. They almost always go bad.
Change them to CLIFF UK jacks. The cliff jack will replace the cheap part, and lasts a lot longer.
Otherwise the audio path is interrupted by corroded contacts....and will be intermittent.

2. Re-solder the entire power amp board. The factory soldering is generally pretty poor.

3. Replace the dual 100K power control. You already got that.

4. Hardware the GROUND connections down to the chassis, with a wire, rig terminal, screw, nut washer.
The ground on this board depends on Plastic Jack Nuts, to hold contacts against the chassis. This is a very poor and unreliable ground scheme.
The metal contact surfaces oxidize, and you lose the ground connection, intermittently.
BYPASS this with wires, and screw the wires to the chassis, so that the grounds will no longer FAIL.

CRAP !...I just ordered one. lol. Thanks though. I will keep you in mind for future parts. Do you carry pots for a Silverface Twin ?

[soundguruman]

CRAP !...I just ordered one. lol. Thanks though. I will keep you in mind for future parts. Do you carry pots for a Silverface Twin ?

Listen to what I told you. Do all four things to this power amp board.
OR you will have repeat failures.

The best place to get pots for silverfaced twin:
Potentiometers | Antique Electronic Supply
Thy don't have to be "genuine" fender pots. The generic ones work fine.

[gtrplayr1976]

Listen to what I told you. Do all four things to this power amp board.
OR you will have repeat failures.

The best place to get pots for silverfaced twin:
Potentiometers | Antique Electronic Supply
Thy don't have to be "genuine" fender pots. The generic ones work fine.

Yes sir. I have copied what you have ,and printed it out.

[soundguruman]

Do all four things, and the amp will KEEP working.