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RE: You can fot k40s in.

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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  • RE: You can fot k40s in. - Jim McShane 10:52:01 12/26/14 (1)

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