Machine Gun Amps
What filter capacitors your amp uses.

The filter caps I have in stock are mostly for Fenders, although some other amps might use them as well. I can get caps for other amps. Click here to read about why you should change your filter caps. Here is what your Fender uses:

Fender amps:
Blackface/Silverface with reverb 40 watts and higher (in most cases, see note below):
3 - 20uf-500v (replaces 20uf-525v that came stock)
2 - 80uf-450v (replaces 70uf-350v that came stock)
7 - 25uf-25v
1- 50uf-50v OR 100uf-100v bias supply filter cap (see note below on this).

Deluxe Reverb/Vibrolux Reverb:
5 - 16uf-475v (replaces the 16uf-450v that came stock)
7 - 25uf-25v
1 - 25uf-50v (DR), 50uf-50v (VR) (50uf-50v is an upgrade in Deluxe Reverbs, and recommended)

Blackface and Silverface Champ and Princetons:
All of these use the 20uf x 4 at 475v can cap. This is fairly difficult to replace, ask me before buying one.
Also, these amps need these:
Champ:
1 - 25uf-25v (50v recommended on the power tube cathode resistor)
1 - 25uf-50v
1 - 2uf - 25v
Vibro-Champ:
Add from above:
1 - 25uf-25v
1 10uf-50v instead of the 2uf-25v
Princeton:
3 - 25uf-25v
1 - 25uf-50v
Princeton Reverb:
6 - 25uf-25v
1 - 25uf-50v

Brown amps 50 watts and higher:
7 - 20uf-600v (20uf-500v should work in most cases, the 20uf-600v is physically to large to use)
4 - 25uf-25v (Bassman uses 3)
1 - 2uf-25v
2 - 8uf-150v

Late '50's Tweed Bassman/Tweed Twin:
1 - 8uf-450v
4 - 20uf-500v
2 - 8uf-150v

Late '50's Tweed Pro/Super/Bandmaster:
3 - 16uf-475v (replaces 16-450)
1 - 8uf-450v
1 - 100uf-100v

Late '50's Tweed Deluxe:
3 - 16uf-475v (replaces 16-450)
2 - 25uf-25v
1 - 25uf-50v

Late 50's/early '60's Tweed Champ:
1 - 16uf-475v (replaces 16-450)
2 - 8uf-450v
1 - 25uf-50v


Blackface/Silverface 50 watt and higher amps that don't use what's listed above:

Non reverb amps used fewer of the 25uf-25v's in the preamp. Let me know what amp you have, and I'll figure it out for you.

The AA763 model amps were the very early blackface circuits. These amps use:
5 - 20uf-500v (replaces 20uf-525v) instead of 3 20uf-500v and 2 80uf-450v.

Later silverface amps that say 70 or 135 watts below the speaker jacks use different caps. Email me about this if you need them.

Blackface Bassmans (AB165) use an extra 16uf-475v (replaces 16uf-450v). The schematic shows that it should be a 8uf-450v, but the ones I've seen have actually had the 16uf-450v. Either one should work.

Also, some silverface amps used more filtering on the bias supply later on. The 100uf-100v will cover this nicely.


Marshall and Hiwatt:

These amps use the clamp mount LCR caps. Ask me if you need these. The original company is still making these caps.


Other amps:

If you need caps for amps not listed, ask me and I'll see if I can figure out what you need. Some amps use strange sized twist mount can caps that may be impossible to find. In these cases, sometimes you can mount standard axial caps inside the chassis. Sometimes not. Ask me and I'll see if I can figure it out.


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Last updated 11/17/00