I'll be lucky if I can shut the d**n regen up!

[mstechca]

Sorry for the title :lol:

But, I have one small problem with my regen.

1/2 the time, it just oscillates (screeches). 1/2 the screeching stops just by modifying the capacitor from base to ground in my regen detector (similar to Rick Andersons Superregen Receiver at **broken link removed**) and modifying the coupling capacitor connected to the regen's output.

I have a gut feeling that to make the regen work well, one capacitor must have a ridiculously large value, and the other one must have a ridiculously small value. I just can't figure out the optimal capacitor values.

The only other thing I will try is to make the base to ground capacitor ridiculously small and the coupling one ridiculously large.

Ridiculously large means over 1uF, and Ridiculously small means 470pF and under.

 

[audioguru]

Since it screeches, your circuit obviously is not squegging.
Your changes to a squegging super-regen have converted into a continuously oscillating regen as explained by me in your other post. 8)

 

[john1]

Hi mstechca,

Don't know if this will help,
i used to play round a lot with regen not super-regen,
and i found that i often had to artificially reduce the gain
of the regen transistor, this sometimes made the circuit less
likely to burst into oscillation, and also meant the tickler
could be a bit closer coupled. Didn't always work though.

Another thing i did quite often was to reduce the supply on
that stage, sometimes down to around a volt or so to get it
to behave how i wanted. That is not bursting into action.
That usually worked.

Best of luck with it, John