Tube DIY Asylum

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HK Citation V

Posted by Triode_Kingdom on April 29, 2021 at 10:31:50:
This amp has two resistors in series with the filament leads of the 12BY7 input stage. It appears this drops the filament voltage by about one volt, to 5.3V or so. Any idea why HK would have done this? None of the other tubes in the amp are treated this way.