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RE: Fisher 800-C questions (newbie)

134.174.165.168

Thanks, this is exactly the sort of advice I've been looking for! It seems pretty common-sense, but I wasn't sure whether putting the tubes in for only a brief period as you mentioned would hurt the unit or not.

How long do you think it is safe to leave Electro-Harmonix 7591A tubes in with no changes?

Also, is there a way to mod the receiver to handle these tubes without doing any conversion to the 12AX7 tube types, etc.? Someone previously mentioned that "The comprehensive solution to the problem is reduced grid leak resistor value and reworking the driver/splitter from a 12AX7 to a 12DW7." Sounds like a pretty big hassle...

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