[Hallicrafters] HT-37 problem

[K4PRF - Burton Pratt]

Happy New Year,

I'll cut to the chase.  The filament choke (L-15) feeding the heaters in 
the 6146s in my HT-37 overheated while I was in a QSO on forty meters.  
Saw smoke and shut it down.  I know about the plate to filament PT 
transformer problem usually caused by a shorted 5V4.  I think I put a 
5R4 in place of the 5V4 and changed the bias rectifier long ago.  The 
resistances on the 6146s are right on.  I will check the tubes tomorrow 
and start the usual diagnostics soon but thought some of you might have 
a suggestion.

Thanks and 73,

Burt Pratt,  K4PRF