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Old 30th May 2022, 7:07 pm   #61
regenfreak
Heptode
 
Join Date: Nov 2018
Location: London SW16, UK.
Posts: 655
Default Re: 6-gang FM stereo tuner heads

Quote:
another series resistor to the IF out hot side, as required (value depending on IF transformer ratio; ~50-150 Ohm should do).
No, 50-150 resistor would heavily load down the IF amp LC tank giving completely wrong response curve. Min value would be 100k to 330K plus HV DC isolation cap. Valve IF amp has very high I/O impedance.
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