Where to get replacement parts for a Warwick Quad VI amp?

[shaft311]

I've checked the Warwick site for amp parts, and they have a grand total of 19 amp parts listed, none of which are what I need.

I have a Quad VI amp that was given to me not working. I've figured out the problems, and they are relatively simple fixes.

I need the following:

-Mute switch
-High cut switch (looks to be the exact same part as the mute switch)
-Gain input assembly
-Bulb for the blue W

Both those switches have tiny copper pieces in them that make contact with the circuit board and slide across small pieces of metal to complete a circuit. The mute switch was missing these completely. The High Cut switch had them, but I damaged them while I was removing the switch in an attempt to see just what a proper switch assembly looked like.

I'm completely new to the inside of an amp head, but you gotta start somewhere!

Thanks for any assistance!

[BassmanPaul]

Remember there are dangerous voltages inside an amplifier. Be careful what you do. If you are new to amp repair it might be advisable to go the tech route.

[T-Bird]

Hi.

Hi.

^What Paul said.

Originally Posted by shaft311

I'm completely new to the inside of an amp head, but you gotta start somewhere!

A complex circuit like a bass amp, isn't IMHO the way to do that.
But, if You do, BE CAREFUL.



Reverse-engineering the switch(es) is easy, and Your local RS or eqvivalent will most likely carry them.

The bulb can probably be found from there as well.

Gain input assembly??

What the heck is that?

If it's some sort of input module on its own PCB, then just determine the needed signal-level the next stage requires and make a gain stage to match the input to it. Easy with a signal generator and an o'scope.


Regards
Sam

[shaft311]

Thanks for the info.

By RS, do you mean http://www.rselectronics.com/ ?

I am aware of the voltages stored in capacitors and so forth. I'm careful what I touch. I'm not just poking around with metal tools and my fingers to see what blows up first

I've repaired other electronic devices and have been in IT for over 10 years, so I am somewhat familiar with the inner workings of electronic devices, just not all the specifics of an amplifier.

I had planned to just drop it off at an amp tech, but I can't find anyone around here who works on tube amps (it has a tube pre-amp). Amazing for being in Nashville, the Music City, eh?

As far as the gain assembly goes, it's the potentiometer that's secured to the front of the amp with a nut that you twist with a knob to control gain input. The piece will turn, but is loose and worn out, and seems to catch at certain points in its rotation, not to mention the threaded piece that protrudes through the front of the amp has been broken off. I have it, and it could be soldered/epoxied back on, but I would still have the problem of the potentiometer being worn out.

When I get home this evening, I will take pictures of the switches needed, and the gain input piece I mentioned.

[T-Bird]

Hi.

Originally Posted by shaft311

Thanks for the info.

By RS, do you mean RS Electronics - Industrial Electronic Components Distributor ?

You can probably get the parts from there as well, but I was referring to Radio Shack.

Originally Posted by shaft311

I had planned to just drop it off at an amp tech, but I can't find anyone around here who works on tube amps (it has a tube pre-amp). Amazing for being in Nashville, the Music City, eh?

As far as the gain assembly goes, it's the potentiometer that's secured to the front of the amp with a nut that you twist with a knob to control gain input. The piece will turn, but is loose and worn out, and seems to catch at certain points in its rotation, not to mention the threaded piece that protrudes through the front of the amp has been broken off. I have it, and it could be soldered/epoxied back on, but I would still have the problem of the potentiometer being worn out.

When I get home this evening, I will take pictures of the switches needed, and the gain input piece I mentioned.

The pics will help, and if it's just the potentiometer that needs replacing, it should have value markings on the body.

BTW, a few pre-tubes doesn't make an amp a tube amp in repair sense, it's the power section that uses unusually high voltages and dedicated circuitry. An amp with just a tube pre shouldn't pose a problem for a regular amp tech.

Regards
Sam