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In Reply to: RE: A final (I hope) question about main-PS (600VDC) caps for my Frankensteins posted by jeffreybehr on April 20, 2014 at 19:05:05
I'm seeing a sand bridge rectifier and a 5u4 followed by a choke that is only good for 100 mA. With the bleed on the end, that choke has to be pushing 90% current capacity for 10H.
Before I mortgage my house on boutique Caps, I would consider working the impedance down on your PS if the down stream can handle it(IMO). I'm with Mike on the Black Solens in the PS...you will be hard pressed to get RIO by changing them out.
I saw the pictures early...looks like a nice build...
Stuben
Follow Ups:
...are highly affordable--the most-expensive alternative (Obligattos) is only $265 for both amps including relatively expensive bypass caps.On the lower-R choke, I'm considering it.
On the Solen Fastcaps, what they're really good for is providing a relatively high amount of capacitance in relatively low space and at a relatively low price. They do that by (I believe) using thinner film than other manufacturers' same-Voltage-rated caps. Also, the zinc they use as end-spray is about the worst-sounding metallic material imaginable. The result is a relatively small and inexpensive cap that sounds edgy to LOTS of us out here. I may not be a GEA, but I'm sensitive to that sonic sin, and I can hear it from the Solen FastCaps. I can afford better, so why not?
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
Edits: 04/23/14
$265.00 for those puppies is pretty good. I have used the black Solens for PS smoothing...I can't say that I have ever regretted it....as a Parafeed or coupling cap, no way.... done that. No comparison to good PIO. I have used the military Russian Teflons for coupling....takes some break in but wow...
Have fun...
Stuben
In-between the sand FWBR and 5U4 is (C1) a voltage doubler 220uf 450V.
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