[ARC5] Heathkit DX-100

[Kenneth G. Gordon]

On 30 Jun 2013 at 9:37, wb3fau55 at neo.rr.com wrote:

> I beg  to differ with you Dave, on the DX-100.  No, the VFO was not
> real stable,  but it  had a  real beefy  power supply.  I did actually
> key  mine into a  dummy  load  for 24 hours one time @110watts out. It
>  survived just  FB.  73s Russ

It depends on what you mean by "stable". In fact, the Heathkit DX-100s VFO 
was the VF-1, which was an almost direct copy of the Johnson 122 VFO.

Either VFO, if properly built, is very stable and keys well. I use a VF-1 in 
preference to the later HG-10 as the VFO with my Heathkit tranmitters, a 
DX-35 and an HW-16. The VF-1 is more stable and keys better than the later 
VFO.

ANY VFO of the period took up to 2 hours to reach its best stability anyway...

BTW, I have an added switch and a couple of components to enable either 
cathode keying (original) or blocked-grid keying in my VF-1s.

Ken W7EKB