[AMRadio] Filament choke


sbjohnston at aol.com sbjohnston at aol.com
Wed Apr 29 18:48:17 EDT 2009


Excellent ideas today, guys - thank you very much.  I 've got 100 watts 
+ of drive, so I don't believe I'll use a tuned input in this design, 
instead I'm going to swamp the input to the cathode with 15 1.5k 2W 
resistors as was successful in the SB230.  So the 
cathode/filament/heater power circuit just needs to look open to the RF 
but pass the low frequency AC to light it up.

Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
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