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RE: Fisher 800-C questions (newbie)

134.174.165.168

Thanks, Jim. I didn't realize before that you are the guy everyone else keeps recommending!

I'm wondering what your thoughts are on this earlier response:

"Fisher "cheated" in the value of the 7591 grid leak resistors used.
Current production 7591s tend to misbehave in the out of spec. regime. The comprehensive solution to the problem is reduced grid leak resistor value and reworking the driver/splitter from a 12AX7 to a 12DW7."

That sounds like a pretty big hassle to me, as a novice. However, I am interested if as you say it's not a big deal to make the necessary changes myself (using your kit/tubes) in order to use the new output tubes myself. But the only experience I have is basically using a soldering iron to replace guitar pickups, so it would have to be a pretty basic project indeed!

One more question: after making the changes to use the Electro-Harmonix tubes, would it then be possible to go back and use the original or NOS tubes if I desired? As I mentioned before I don't want to sound like a crazy guy around here, but I'm worried that the receiver may lose some of its "magic" with new tubes, since I've had that experience with guitar amplifiers in the past.

Thanks again for your help!


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