On 2016-Nov-16, at 8:44 PM, Jon Elson wrote: > On 11/16/2016 10:10 PM, drlegendre . wrote: >> "Note the "tube audio" folks gravitate to that stuff and tend to cause >> seriously sick prices, because tubes." >> >> >> FYI - I've installed dozens of the new-production CE / Mallory caps, all of >> them in the 350-525V range. Zero complaints, zero comebacks, in as long as >> I've installed them. For those of us in that field, they're like a gift >> from the gods. >> > Vintage tube audio doesn't need to get involved, except for the old-style > twist-lock Mallory cap design. > All the off-line switching supplies use either 250 V (120 supply only) or > 400+ (120/240 supply) capacitors as the main input filter. So, at least, > capacitors in that voltage range are STILL being made, and are in all > computers, TVs and other home appliances. (Yes, I know the OP needed a 30 V > cap.) > > So, some other tube gear replacement parts may be scarcer than hen's teeth, > but the HV caps are easily available.
(tending off-topic . . ) As long as one is being careful about the size (capacitance) of the replacements. IME, I've found limited benefit in trying to use/source/scavenge switching-supply caps for tube gear. The mains-side filter caps for switching supplies tend to be large in capacitance (100-200 and > uF), and typically are not suitable for replacing the ~ 8-40uF B+ filter caps in vintage tube electronics that have tube rectifiers. Maybe there are smaller ones in the smaller switching supplies around these days, I haven't looked at those recently.
