[ARC5] FW: Way OT -- SX-28 - ARC5 selectivity

[Hubert Miller]

> On Behalf Of Richard Knoppow
 I think this is the same trick Hallicrafters used in the later S-38 (starting with the S-38A I think) also in the National
SW-54 and probably many other receivers. Eliminated needing a separate tube for the BFO. If was made regenerative
>and the AVC was disabled. On my S-38B it sort of worked.

I think that sums it up, it works "sort of". If I'm not mistaken, the Star Roamer had AVC plus the regeneration. 
I tried that once on a Command Sets receiver and found it unsatisfactory. There's something goofy about a control 
that varies selectivity and gain at the same time. It's harder, I think, than operating a regenerative receiver. 
I recall that past articles recommended this also for the ARC-2.
And that some Japanese WWII field portable receivers used  regen IF.
Just not what I would recommend.
-Hue