[Boatanchors] Heath VF-1 now HG-10

[D C *Mac* Macdonald]

Incorrect grid bias voltage leading to the distortion
in what I would expect to be Class A stage operation?
 
73 - Mac, K2GKK/5
Oklahoma City, OK



> Date: Mon, 31 Aug 2009 22:45:55 -0400
> From: w1ksz at earthlink.net
> To: boatanchors at mailman.qth.net
> Subject: [Boatanchors] Heath VF-1 now HG-10
> 
> I picked up a VF-1 that someone had modified to look more like
> the HG-10 circuit. It works well enough, but the output looks a
> bit strange to me.
> The triode section is a Cathode Follower. The Grid has a decent
> Sine Wave (about 5v p-p), but the Cathode Output looks more
> like a pulse train.
> Never having seen either a VF-1 or HG-10 I don't know if this
> is normal. 
> 
> Any thoughts ??
> 
> 73, Dick, W1KSZ