[HBR] Need help with noise

[Mike Hanz]

On 1/17/2014 9:28 AM, Walt Hutchens wrote:
> The mixer is the most likely victim and in my
> opinion the Pullen has a kick me sign on it.

I've never had a problem with getting the Pullen circuit to work well, 
but I've probably simply been lucky with component selection and 
voltages.  Just curious, Walt - have you ever thought about using the 
variable mu capability of a 6ES8 in a Pullen mixer with AGC?  Keats 
Pullen mentioned the possibility to me at a hamfest years ago but had no 
data on it.  Perhaps a balanced mixer using two 6ES8s to eliminate the 
even order harmonics and gain varied with AGC?  It would still need a 
6ES8 preselector in front like the G2DAF design, of course.

      Very 73,
  - Mike  KC4TOS