[Premium-Rx] Off Topic - diversity reception

[Al Klase]

You might try diversity Collins R-390 style.  In both 
receivers, cut the circuit between the AGC rectifier and AGC 
bus, and install a diode in series.  (Cathode toward the 
rectifier.) Now, connect the two AGC buses together. ( I 
guess it ought to be a shielded wire, RCA cable comes to mind.)

The RX with the strongest signal quiets the other set.  Of 
course you mix the two audio signals at some point. 
Receivers designed for diversity service usually have a 
separate IF gain control (in addition to RF gain) to 
equalize the two (or more) receiver-antenna combinations. 
You could most likely do this with an RF attenuator on the 
input from the "strongest" antenna.

Give it a try.

Regards,
Al

Ka9p at aol.com wrote:
> After running an old pair of R4B's in stereo with polarity diversity for 
> a while now, I'm surprised it how useful the result can be at times, so 
> I've decided its worth continuing the fun - what I can't seem to find is 
> any decent imformation on a simple circuit for selecting the stronger 
> signal - if anyone can point in the right direction I'd appreciate it.  
> I have found one note that says on AM the signals can simply be tied 
> together at the detector, with the stronger signal driving the AGC and 
> less stronger signal down - could it be that simple on AM?  Thanks for 
> any steers, Scott


-- 
Al Klase - N3FRQ
skywaves at bw.webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm