[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
Radio is your best entertainment value.

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