[Heathkit] HW-101 questions.

[Kenneth G. Gordon]

> Ken,
> 
> It sounds like the 6.3 VAC filament windings on the HP-23 transformer
> may have gone bad. So instead of replacing the whole transformer on
> the HP-23. That maybe the reason why the previous owner may have done
> this modification. That is my guess, but I could be wrong.

Ordinarily, the filaments in the HW-101 (and the other HW/SB 
transceivers) are in a series-parallel arrangement so that they 
run on 12.6 VAC. That way you can use it as a mobile. So V-20 
gets its filment voltage from a tap on one of the final amps.

Every other tube in this unit light up just fine. I cannot figure 
out why he did this.

Ken W7EKB