[HBR] Regen Birdies

[Bill Cromwell]

Thanks Ron..

..for your prompt reply and right to the point. I had not thought of 
running the regeneration way up as my use is for CW and occasionally 
SSB. The narrower passband near that critical sweet spot is more 
desirable. I have started on a SimpleX Super, a variation on a 
supergainer - superhet with a regen detctor. After that one I want to 
revisit the 6SN7 regen from the old handbooks - the one I build in my 
early teens. I would like to do a better job of it this time. There is 
no rf amp and I don't intend to add one. I'll keep this in mind and see 
what happens regarding those particular birdies.

73,

Bill  KU8H


On 01/13/2015 03:38 PM, Ron Barlow via HBR wrote:
> Hi Bill,
>   My 24A/27/27 regen does not have an RF stage. Many of the "old time" regen circuits, that I have seen, used untuned RF stages, and thus would have shared this particular "birdie" response issue.
>   I don't remember for certain (that happens a lot these days!), but I may have had the regen control advanced beyond the most sensitive position (at the very threshold of oscillation), at the time that I observed this phenomena. I suspect that this would increase the magnitude of this "birdie" response, due to an increase of harmonic energy output, from the oscillating detector.
>   Anyway, I just wanted to pass along what I believed to be a rather interesting and perhaps unusual problem.
>                             73 de Ron n4gjv
>