[ARC5] ARC-2: IF Regeneration is a "No"

[Kenneth G. Gordon]

On 2 Apr 2014 at 8:35, David Stinson wrote:

> More on the RT-91/ARC-2 IF experiments:
> 
> I have experimented with regeneration in the IF stages.

In my (not so humble) opinion, IF regeneration is a "kludge" that is only really 
useful in simple receivers in which no other method can reasonably be used. 
I would never try it in such a complex receiver as the ARC-2.

> circuit: a "main" and a "trimmer." The manual states 
> that the trimmer adjustment is very broad and may 
> not exhibit a "peak." That's putting it mildly; I can't 
> find a peak with a scope.

In my experience, if ANY adjustment does not show ANY result, there is 
something ELSE associated with the circuit that is not to spec.

> I have not yet tried the author's other suggestion of
> changing the 5 pFd coupling caps to 3 pFd.

I was going to suggest the same thing.

> Do you think such a small change will bring a 
> worthwhile benefit?

It might. Also, as I suggested yesterday, moving the cap from the "top" to the 
"bottom" might make a big difference.

I dunno.

Ken W7EKB