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" <w...@outlook.com> To: elecraft@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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
