[Boatanchors] Heathkit DX-40 or Viking Challenger

[Robert Nickels]

Revcom wrote:
> Oh, not sure, but didn't the Challenger use Heising modulation vs the
> screen grid system Heath used?  Dunno.
>
>   
The Challenger is screen modulated and runs more power (120 watts on CW, 
70 watts AM) from a pair of 6DQ6As.  It also covers 6 meters.

73, Bob W9RAN