[Premium-Rx] Diversity Reception

[Richard M. MC Clung]

You stole my thunder John. I was getting ready to put that article up
next. I built one and had it aooked up to an AN/GRC-106 (RT-834). I
brought the AGC out the front by mounting a BNC connector on the front
panel (in a pre-exsisting hole) and used it to switch between an 8
element inline loop array and a sloping V-beam. The An/Grc-106 was in a
AN/GRC-122 Radio Teletype set. The switcher gave us a 98% circuit
reliability as opposed to another station on the circuit with similar
equipment but no antenna switcher who had 75% reliability. Both
stations were communicating from england to a station near Boston, MA.
This was a 24hrs a day tactical circuit that was operating for a period
of 4 months. If anyone wants a copy  of the article I'll post it like I
did the Capt. Lee one.
RICH  WA6KNW
--- john phillips <johnph at cybersurf.net> wrote:
> The usual diversity method is two or more receivers. But apparently
> it can be done with one receiver by switching antennas. 
> 
> I refer to a construction article in CQ Anthology, The Best of CQ
> 1945-1952.
> This booklet was published in 1958, and in it there is an article by 
> W . Roderic Bliss , W0SNH  who constructed a flip-flop circuit using
> 4 tubes
> to switch the antennas depending on which one was supplying the
> strongest signal. There were two antenna inputs, one antenna output
> and an A.V.C. input.  
> It worked quite well for him on AM, FM , and frequency shift keying
> but not CW .  The unit accepted a wide range of freqs. from 
> 3 to 30 megacycles.
> 
> A rather novel approach. 
> 
> John
> VE6XI