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RE: 1959 Ampex 6973 Monoblocks

K40y-9 couplers for the .1s and .068s and .047s depending on the ones you have. I have a pair that belongs to a friend in Ca and I used VIt Qs in his but k40s are great also.
For filter caps,I like using a polyprolyene coming off the 6ca4 and a 15 to 20uf at 450v will do nicely.
On the other side of the resistor coming off the rectifier,use 100uf and down stream use another 100uf. I can post a photo later.
Also,you have to change some wiring that erodes over time.

"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken


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