Radio Road

Yes, I was planning on....

68.7.9.132

Cougar

A

In Reply to: RE: Fisher KM-60 update. posted by BFitz on November 12, 2018 at 15:09:22

changing out the output caps. I have some 1uf Audyn Copper foil caps along with some 1uf Jensen Copper Foil PIO caps. Both are and may be too big to fit in the bottom of the Fisher KM-60. I do have some .33uf Audyn Copper foil caps that will fit. I just remembered I do have some Jupiter .47uf square caps that sound really good too, they may fit in there. so I do have some good choices for caps.

I may also change out the resistors that feed that 12AX7 tube since I have 100K Takman resistors.

Follow Ups:

RE: Yes, I was planning on.... - Triode_Kingdom 22:33:55 11/12/18 (2)
The problem with large coupling caps is overload recovery. And values like 1uF are completely unusable given the limited current capability of a 12AX7. My suggestion is to use higher quality parts, but don't try to out-engineer Fisher. Very few audiophiles are up to that task.

--------------------------
Buy Chinese. Bury freedom.
- RE: Yes, I was planning on.... - BFitz 08:02:33 11/13/18 (0)
  All good points, but I wonder how much of a problem it would be, in the case of a KM60? Have you actually tried it?
  
  I have a KM60 here, and like it's sound too. I actually measured the response in my lab, and posted it back in 2004. It is down a few dB at 20 Hz.
  
  You can always do a trial by soldering an additional cap across the existing 0.1uF cap and listening. If you do only one channel and listen in mono, you can compare stock to modded on L versus R.
- Just wanted to try what I had.... - Cougar 04:42:02 11/13/18 (0)
  here in my stash box to see how that type of cap would sound before I ordered the correct value or parts. I totally hear what you're saying always try to use the same value parts.

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