vintage T multi-cap replacement?

[carl309]

i just discovered that the multi-cap can on top of my '73 model T is damaged (dented, in fact), and was wondering if any of you knew a suitable replacement?

i think i read somewhere that this one would work.. is that correct?

[Ryan Phelps]

Carl,
Try Antique Electronic Supply at tubesandmore.com
They carry reproductions of the Mallory Aero caps that Sunn used. Also check New Sensor at newsensor.com They carry JJ brand multi-caps as well.
Good Luck!
Ryan

[carl309]

alright, i got the proper replacement (40/20/20/20 uf @ 525v)

but now i've got another question..
the original can's terminals are labelled "60 to 80 uf"
i realize that i'll have to wire some terminals in parallel to get the correct capacitance, but which is it, 60 or 80 uf? and how should i go about wiring it?

i know how to solder, so it should be no problem putting it in once i figure this part out.

[carl309]

sorry, i forgot to mention: the original can only has 2 terminals, as opposed to 4 on the new one.

[Ryan Phelps]

Carl,
The cap you found will work in the 40 and 60 watt Sunn tube amps (Sonaro, 200S, etc.), but not in the Model T. I checked the schematic on this website and found that the original cap is a 2-section cap....one section is 60uf and the other 80uf.
  The cap only needs to be rated at 450 volt according to the schematic (higher voltage rating is OK). As I recall, you can use higher capacitance in a power supply without any harm (see Gerald Weber's books). So you could use a 2-section cap of 100uf / 100uf. Or try the 80-40-30-20 at 525 volt cap (Antique Electronic Supply). The 80uf section is a direct replacement. Wire the 40uf and 20uf sections in parallel and you are in business. Which ever way you go, be sure to check the cap diameter for fit in the amp and buy a new mounting clamp. Also...unless you know how to work on tube amps, take it to a tech. The voltages are lethal (seriously).
Good luck!
Ryan