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Use of RCA 237 Tubes in Radio with AC Powered Filiments
Arran
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#4

06-19-2015, 10:47 PM
  If all of these tubes have an indirectly heated cathode then they should work on either AC or DC. Why would anyone bother using a an indirectly heated cathode in a DC only tube when they could use a directly heated one which is simpler to construct?
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Arran
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RE: Use of RCA 237 Tubes in Radio with AC Powered Filiments - by Arran - 06-19-2015, 10:47 PM



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