Quote:
Originally Posted by dieseljeep
IIRC, the 17CDP4 has a 8.4 volt, 450 ma heater, where the 17CFP4 has a 6.3 volt, 600 ma heater. 
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OK, the odd voltage rings a bell, that tube fits these RCA sets then.
I had one rebuilt a dozen years ago by a guy in Texas, no longer in business though.
A spare is tempting but $99 is a bit more than I want to pay for a tube to sit in my closet.