[Elecraft] Rhombic antenna "gain"

[donovanf at starpower.net]

Hi Todd, 


Its not accurate to state that the Pusher FRD-13 CDAA is a " variant of 
the the FRD-10" CDAA. Their architectures are quite different and 
have little in common other than their circular shape. The FRD-13 
relies on less effective (but much less expensive) analog RF phasing 
to develop its front-to-back ratio while the FRD-10 uses a massive 
(and extremely expensive) reflecting screen. 


Immediately after World War II, the Soviet Union built and deployed 
many dozens of Krug DF arrays, direct copies of the German 
Wullenweber DF array. Some of them are still in use and look 
almost exactly like the World War II Wullenweber arrays. 


www.thelivingmoon.com/45jack_files/04images/Krug/Odessa_I_PC030200_8965681.jpg 


73 
Frank 
W3LPL 




----- Original Message -----

From: "Todd KH2TJ" <w7tr at outlook.com> 
To: elecraft at mailman.qth.net 
Sent: Saturday, September 14, 2019 7:25:39 AM 
Subject: Re: [Elecraft] Rhombic antenna "gain" 

Correct. USN had FRD-10's and USAF/US Army had FLR-9's. 

Lesser know variant of the FRD-10 was called the "Pusher". We had one 
out on Diego Garcia. About half the size of the FRD-10 iffen I reall correctly. 

I spent almost 5 1/2 years working at the one at NSGD Guam. 

73, Todd KH2TJ 


>Hi mike, 


>Wasn't Rota an FRD-10, not an FLR-9? 

>73 
>Frank 
>W3LPL 




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