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In Reply to: Lytic caps for tube amp posted by airtime on April 27, 2007 at 17:20:46:
JJ multi-section can cap 40-20-20-20 @ 500 volts. Not twist-loc, but requires a clamp for mounting (which will fit the old FP type screw holes already in chassis). Sponsors' AES & McShane sell 'em for about $15. The shell is insulated, so run a separate wire to chassis if your circut requires such.
Follow Ups:
Ron
On those JJ caps thats 40-20-20-20,did you have to make the hole bigger to get it in place of the existing filter cap?..I bought 2 of them and they are a nice cap but the bottom pins wont go in the existing filter cap hole and I was wondering what I can do about it? They are just too big around.
I just had the same issue with the amp from a Hammond M3 organ, Mike. What I did was use one of the twistlock holes for the grnd lug of an F&T multi. This brought the other lugs more to the center of the existing hole. From the top the hole is stll completely covered, so other than being slightly relocated, it looks good.
with the JJ electrolytics is to remove the original filter caps *and* the mounting ring for the twist locks. The 2 rivet holes used to hold this ring in place are then used to mount a cap clamp that then holds the JJ in place. You can then slide the cap down into the big hole so that the lugs are easily soldered to. The trick is drilling or pushing out the old rivets without causing other things to break.See Jim McShane's site for some pics of how he does this with the Citation II power supply to get an idea. So far, its worked on the Citation II, Citation I, Mac MC-75s and, shortly for me, the Mac MC-225s. In the case of the Citation II and the Macs, I used a properly sized punch and hammer with a properly sized socket on the back side to drift out the rivets so there wasn't any metal filings from drilling floating around. To do this, however, required removal of the entire chassis bracket from the unit. It wasn't that hard to do once I figured out where all the wires went - take *lots* of notes and pictures.
Hope that helps.
Cheers,
Yep, gotta remove the twist-loc's mounting wafer too.
Mike, I used 'em on Heathkit AA-32. With that amp there was no need to enlarge the existing hole.
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