Hi Wayne, As far as electrolytics in a transistor audio signal path go, I personally prefer, Sanyo OS-CON caps. I've now replaced stock caps and/or Black Gates in my personal tuners and in several Scott Nixon DAC's (after the tube). But for my favorite Nixon DAC I did use polypropylene coupling caps. It had to be built in a larger chassis of course. Having said all that, one friend preferred the Black Gates in a tuner over Sanyo's. But for me, the OS-CONs sound a little sweeter. A little less bright at the top. The next guy may want that. I used a mix of Sanyo's and Nichicon Fine Gold's in the Kenwood KT-5020 because I was working with parts (and correct values) available off my work bench. In the direct signal path I used two Fine Gold's for coupling before the output buffer, 10uf, the correct value per the schematic. After the buffer I used four Sanyo's for coupling of a larger value than stock 22 uf. I would have used all Sanyo's but didn't have any at 10 uf. Also change out three 'decoupling caps' with Fine Gold's. I haven't built a tuner using all Fine Gold's. So I guess I haven't really answered your question! Sorry Wayne. 8:-) jim...
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