[ARC5] Regeneration, and the RU, among others.

[Kludge]

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Kenneth G. Gordon
> I have used several U.S. military TRF receivers, mostly those for 
> VLF, but my favorite, the RAL for HF. There is absolutely 
> NOTHING requiring "two-handed" operation. Even the regen 
> control has an auxiliary pot attached to the rear of the main tuning 
> dial that automatically compensates for the change in regen 
> setting across a band. 

That pot on the tuning mechanism would be the "second hand".  

> Also, there was an article in a recent issue of ER concerning the 
> RU, which is also a TRF. The author found it to be a really 
> excellent receiver. It, also, does NOT require "two handed" 
> operation.

Okay, let's make this simple.  (I know some of the symbology is off; it's
been a while.)

TRF != regenerative detector.  TRF = TRF.  Regen = regen.  Regen = some form
of adjustment of regen control across tuning range - a "2nd hand", meat or
mechanical.  

RAL = regen = mechanical 2nd hand with provisions for meat.  

RU = TRF.  RU != regen.  !Regen = !regen control = !"second hand."

Also, RU = built-in BFO that tunes with the Rx.  

And finally, for reference purposes, homemade (or just home) regen sets !=
military equipment.  

> His conclusion was that the RU was, essentially, a really superb 
> Direct Conversion receiver.

Odd.  The BFO is only on when in CW.  Did he actually check out the
schematic or find a manual and follow the circuit description?  In AM, the
BFO is off which means it suddenly isn't DC but a just plain old grid
detector doing what grid detectors do, that being detect.  While the end
result in CW & SSB may functionally emulate a DC receiver, it is by no means
one at all.  That's kind of like saying a command Rx has a product detector
since it acts like it does when the BFO is on.

Best regards,
 
Michael, WH7HG BL01xh
http://www.nationalmssociety.org/chapters/NTH/index.aspx 
http://wh7hg.blogspot.com/ 
http://kludges-other-blog.blogspot.com 
Hiki Nô!