Fender SF Champ re-cap parts

[Fender Guy]

Any one tell me where to find a SF Fender Champ cap can that will fit in the orig hole.

This part would do spec wise (leaving one lug unconnected), but size wise it is too large a diameter:

http://www.mojotone.com/amp-parts/JJ-Te ... mp-3166110

I have not been able to google a replacement part that would fit in the orig Mallory cap can hole in chassis.

How have you guys been getting around this problem with out drilling the chassis hold larger (which I DO NOT want to do)??

Thanks

[martin manning]

How about this 20-20-20:

http://www.vibroworld.com/parts/tech15.html

[billyz]

CE Distribution has the original Mallory FP tooling machine and they make the correct Can Cap for your Champ.

[Fender Guy]

Thanks guys, I found it:
http://www.amplifiedparts.com/products/ ... EC40-20-20

BTW Martin, I would need a 40/20/20 and not a 20/20/20 correct?

Let me know if any one sees it cheaper then $30.

[Dr-Joned]

29.95 at www.tubesandmore.com, which is the consumer side of what Billy said.

[martin manning]

Is this your amp?
http://www.ampwares.com/amp.asp?id=42
Schematic says 20-20-20.

[Fender Guy]

Is this your amp?
http://www.ampwares.com/amp.asp?id=42
Schematic says 20-20-20.

Yep Martin, that is it. The cap can says Mallory 40/20/20 though?

Any chance Fender used a 40/20/20 or do you guys think amp has had a mod, or maybe part replaced and that is what owner/tech at the time just put in?

I will have to take some pics of inside of chassis and post so you guys can get a look see?

[Fender Guy]

Martin

Any one know when Mallory stopped making the cap cans?

I did a quick google on did Fender ever use a 40/20/20 on a Champ and got this:


http://www.audiokarma.org/forums/archiv ... 74166.html

Third post down:

My Silverface Champs have original 40-20-20 @ 450 caps. Regardless, I use these for repairs.... https://secure.cedist.com/scripts/foxwe ... %5CELEVATO R.FXP?item=C-EC40-20-20

CAPACITOR, ELECTROLYTIC, 40/20/20 µF @ 500 VDC

C-EC40-20-20

Made in the USA, to the same specs as the Original Mallory, on Mallory's original machinery.

* 3 sections - 40/20/20 µF @ 500 VDC
* -10%, +50% tolerance
* 55° temperature rating
* 1-3/8" diameter x 2-1/2" tall

[Fender Guy]

Hope this is not a double post as forum threw me out for a second.

Martin, I see the 20/20/20 on the schematic (although I can barely read a schematic).

[Fender Guy]

Hope pics you guys can tell me a few things. The cap can looks to have been replaced as two unused globs of solder not being used.

Does it look like stock wiring, and what is the advantage of 40/20/20 vs 20/20/20?

[billyz]

The CE can caps are pretty expensive. You can always sub in some axials and hot glue them to the inside.

[Fender Guy]

The CE can caps are pretty expensive. You can always sub in some axials and hot glue them to the inside.

Bill, it appears the CE cap has already been replaced. Since it appears they replaced the can cap, I am not sure I want to replace it again, even though I do not know when they replaced it, the amp is quiet and sounds good. Better then having the orig cap can in there I guess, as if the orig cap can, it would be 35 years old or so.

Yea, those cap cans are expensive at about $30.

Any one know what the advantage of the 40/20/20 cap can is, as above poster said stock should be 20/20/20?

[Fender Guy]

Unrelated question:

I have been able to get amp covers for all my Fender amps with the Fender logo (black covers with white Fender logo), and pretty cheap.

I have not been able to find a Fender Champ cover with the Fender logo for some reason.

Has any one seen a cover to fit a Champ with the Fender logo?

Thanks

[C Moore]

The CE can caps are pretty expensive. You can always sub in some axials and hot glue them to the inside.

In the scheme of things, I guess 30 dollars every 20 years is not a big deal. But Yeah, I have always just used axial caps.....
Good Luck

[martin manning]

Any one know what the advantage of the 40/20/20 cap can is, as above poster said stock should be 20/20/20?

I can tell you what the dis advantage of the larger value is. Vacuum tube rectifiers are sensitive to the value of the first (reservoir) capacitor because of the in-rush current through the charging cycle, and a recommended value is given on the spec sheet. On the GE sheet, the value for a 5Y3GT at 350V is listed at 20uF. However, the rectifier won't conduct until the cathode gets up to temperature, so there is a natural slowing of the process at start-up (if no standby switch is involved), and if the current draw of the down-stream circuitry is small, the ripple is is small, and it can survive with a larger value. It may shorten the life of the rectifier some, though, and I would think that there would be some effect on the amp's tone. In your pictures that can cap looks like the original part to me, based on the solder joints.