In Reply to: RE: You can fot k40s in. posted by sam@edelmannpgh.us on December 26, 2014 at 10:31:51:
Sam, that was NOT what I recommended! I recommended a change in the value of the grid "leak" resistors since the 330K resistors used in the Fisher were above the spec for the tube, and the EH tubes you got (and all other modern 7591As) are more sensitive to this resistor value.
That resistor change is not required on the 225 since the stock values are in spec by a comfortable margin.
Also, as Mikey mentioned you CAN fit K40s to the 225!
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Follow Ups
- RE: You can fot k40s in. - Jim McShane 10:52:01 12/26/14 (1)
- RE: You can fot k40s in. - sam@edelmannpgh.us 11:33:44 12/26/14 (0)