Peavy Classic Deuce 2 Guitar AMP on switch

[audioun]

I have a Peavy Classic Deuce 2 Guitar AMP i picked up at sale.And the amp looks good no dings no nobs missing.Except the on and off switch.When i plug it in the light comes on.the 2-12 speakers are working because i pluged them into the speeker jack on the back of my kustom 2 lead.all of the on and off switch that is left is the plastic box looks like the wireing is in tack. What i would like to do is bypass this switch or stanby and see if the sound come through the speakers.Then ill find a switch for it.All the tubes work and are lighted on. Any Help With this will help me salvage from what ive gatherd from others is a good Amp. Thanks for any Help

[oc disorder]

Hi audioun and welcome to the forum.
I guess what you are saying is the power switch is broken but although you cannot
use the switch to turn on and off its present state is permanently on and you can only
turn it on and off at the wall.
If everything lights up this shows that power is getting to the transformer
and the heaters or filaments in the valve are lighting up or working.
The valves could still be faulty as the glowing heaters don't indicate that the valves are ok .
You have checked the speakers but you are getting no sound.
There should be internal fuses too although some models vary.
I would guess there is no HT (high voltage rail) which the standby switch
switches but unlikely that a faulty switch is the cause.
There have been previous posts on this and the Peavey Mace which at some point were virtually the same amplifier so I would suggest you use the seach function in the forum and search for Peavey Deuce and Peavy Mace.
Its possible the output valves are worn and over a period of time have stressed the power supply and instead of blowing the fuse they have "blown" the large light blue (aqua?) resistor that the HT supply normally passes through.This has been a fault documented with previous postings.
Its R1 a 400 ohm 10 watt resistor which would be difficult to find. A 390 ohm
or 430 ohm 10 watt wire wound resister would be ok.
You must be carefull in this part of the circuit as there is 500volts DC there
even when the amp is off as the capacitors store the charge.
Just had a look at the schematic and they do have bleeder resistors fitted
so after a few hours they should be discharged.
Measure that resistor with a meter and check it measures approx 400 ohms.
If you dont get any reading its open circuit ie burnt out !
I would fit a new power switch sooner than later .From the diagram it looks like a
on/off/on double pole double throw toggle centre off which could be replaced with
just a double pole double throw (on off) as I dont think polarity reversal on a power switch
is as necessary these days with a 3 core power lead and propper grounding.
Here is a link to a previous post re the resistor.http://music-electronics-forum.com/t12649/

[Dave Curtis, dB AudioTech]

"Just had a look at the schematic and they do have bleeder resistors fitted
so after a few hours they should be discharged."

You mean a few minutes? With bleeder resistors, the voltage should reach a safe level within a minute (per NEC); don't guess, though. Confirm with your meter. I've worked on amps with no bleeders that were safe in less than a minute, and others that still had a charge after a day or so.

[audioun]

Thanks Guys i just got my new parts in.Now the fun part starts.When i ordered this box of tube amp parts in i could not belive at the amount of stuff i got.Switches resistors cap in out jacks 6L6GC Tubes and a few other tubes differant color lights small rolls of differant gauge wire color coded.And a slew of other stuff.My Girl friend ordered this stuff all i did was told her i needed a peavy duce 2 repair kit. Beats Me.But this is work in prograss any help will be truly appreciable.It reads like this. It is after lunch he begains to prepair his testing tools and solder awats to be pluged in.As he sits in the Music room Pondering.I used to help work on old tvs i do know a little.i guess ill start with this switch?

[Silvertone Jockey]

"Just had a look at the schematic and they do have bleeder resistors fitted
so after a few hours they should be discharged."

You mean a few minutes? With bleeder resistors, the voltage should reach a safe level within a minute (per NEC); don't guess, though. Confirm with your meter. I've worked on amps with no bleeders that were safe in less than a minute, and others that still had a charge after a day or so.

In the interest of safety I am bumping this thread because I have personally experienced a nasty shock from the caps in a RF amp with no bleeders more than 6 months after it was last energized. Don't take chances with electrolytic caps, ALWAYS DISCHARGE THEM before touching anything in the amp