Fender Twin Reverb....silver face

[bsco]

Hi guys....I have this amp that was dropped off....doing a visual and discovered a thermal cut-out wired into the amp...the type that you would find in a hair dryer or electric iron..........with lamp cord or more commonly called zip-cord......you know...the table lamp AC type wire.......anyway, the schematic don't show it......instead the schematic shows a 2700 ohm 10W resistor....but this resistor in not here.......also...this thermal cut-out is wired into the ac primary side of the supply.....the 10W resistor is supposed to be off the stand-by switch and also connect to the main filter caps............is it possible I have the wrong schematic......I doubt it but I thought I would ask.......I also noticed a bare wire connecting from the pilot lamp housing to a terminal tie strip to a point where the green heater wire is connected to the same point on this strip.....the other side of the pilot lamp housing is directly connected to the other green heater wire which is from the transformer.....(what moron would do that I wonder)..these kinds of short-cuts are very sloppy and very dangerous......Thanks for any info here.
Cheers,
Bernie
P.S. I am glad that I am able to fix my own gear.....after seeing some of the stuff that has been done to other people's equipment, I don't think I would be able to let anybody touch anything that I have.....

[g1]

All better now after the birthday burn Bern?
I think that is a CSA thing, there may be pics on google, I'll see if I can come up with anything.
Many of the ones I've seen have been bypassed with a fine wire when the thermal has opened.
Does it have an inky CSA stamp on or in the chassis?

Edit: like this

[g1]

Here's a schematic that shows it, but we should find you the right one, does it have master & pull boost?
UL taps on OT?

[bsco]

Here's a schematic that shows it, but we should find you the right one, does it have master & pull boost?
UL taps on OT?

Yes.......all burnt out from the birthday party.......I was in hard shape Friday.........anyway.......that schematic is the right one.......I had two schematics here but were different.......so that skinny wire is actually supposed to be there and 6 or more inches long?? and is approved by CSA? wow!!! I remember seeing tv's make for Sears and they used one strand of fine wire for the fuse but were insulated by a slightly larger plastic insulator......it wasn't an exposed bare wire like this one.....ok then....and the thermal cut-out is there as well.......but why somebody had chopped the original wires out and used lamp cord in unknown.....
I stand corrected........I never knew that.....I also noticed that the amp has a 3 prong power cord but still employs the ground switch.....with the so called death cap........I was thinking of removing that cap but now I am not so sure......I take it that it is safe to leave it there......Thank you for the schematic......
Cheers,
Bernie

[bsco]

All better now after the birthday burn Bern?
I think that is a CSA thing, there may be pics on google, I'll see if I can come up with anything.
Many of the ones I've seen have been bypassed with a fine wire when the thermal has opened.
Does it have an inky CSA stamp on or in the chassis?

Edit: like this
[ATTACH=CONFIG]33820[/ATTACH]

strange indeed....I never noticed an inky CSA stamp inside the chassis.......but I can take another look to see if it is there.....most of the stuff I get is new from the store...I normally don't see much in the way or older vintage gear.........probably because it was built better to begin with........
Cheers,
Bernie
PS. that's why all my gear was built before 1980.......I wouldn't buy anything new.......

[Mickey]

Go easy on the criticism, sooner or later you'll be on the receiving end!

[Tom Phillips]

...so that skinny wire is actually supposed to be there and 6 or more inches long?? and is approved by CSA?...

The photo in post #2 appears to be a gut shot of a Fender Champ amp. In that particular amp the chassis is used as the conductor of one side of the heater circuit. The skinny wire in the photo is connected to chassis ground and therefore is not a big issue in that amp. I would not expect to find a bare wire like that in one side of the heater circuit in a stock Twin Reverb. Can you post photos of the amp you are working on?
Tom

[bsco]

The photo in post #2 appears to be a gut shot of a Fender Champ amp. In that particular amp the chassis is used as the conductor of one side of the heater circuit. The skinny wire in the photo is connected to chassis ground and therefore is not a big issue in that amp. I would not expect to find a bare wire like that in one side of the heater circuit in a stock Twin Reverb. Can you post photos of the amp you are working on?
Tom

I can......the wire was about 6 or 7 inches long where it should only be maybe three inches.....so I shortened it up and put a fireproof or heat proof white sleeve which would be found in fog machines, etc.....and I connected it back up exactly the way I found it........and it was not connected to ground.......the pic shows the thermal fuse on the right side in the photo...the one on this amp is on the left....I will get some pics and post them shortly......

[bsco]

Sorry Tom....no pics...can't get anything to work....

[Tom Phillips]

Sorry Tom....no pics...can't get anything to work....

Is the problem with the posting procedure or your camera?

[bsco]

Is the problem with the posting procedure or your camera?

The problem is with the cameras...... I will take another crack at it today.....if I can get some clear pictures I'll post them......
Cheers

[Tom Phillips]

The problem is with the cameras...... I will take another crack at it today.....if I can get some clear pictures I'll post them......
Cheers

OK. Hope you work it out. Photos will save you a lot of narrative writing trying to explain things.
Good Luck,
Tom

[bsco]

OK. Hope you work it out. Photos will save you a lot of narrative writing trying to explain things.
Good Luck,
Tom

Ok. Tom. I have some pics...Lets see if I can get them posted......sorry won't load up.......I am not really comfortable with this computer stuff.......trying to convert files....resizing files, not knowing what programs to use, etc, etc.......maybe I can email them to you......as I have no idea of what type of program is being used to take these shots.....all I do it point the camera and press the button.....

[The Dude]

......I also noticed that the amp has a 3 prong power cord but still employs the ground switch.....with the so called death cap........I was thinking of removing that cap but now I am not so sure......I take it that it is safe to leave it there......

It's still a "death cap" and I'd remove it. If you have a grounded AC cord installed, you don't need it anyway.

[bsco]

It's still a "death cap" and I'd remove it. If you have a grounded AC cord installed, you don't need it anyway.

Ok. Thanks for the info...Consider it gone.......
Cheers.