[MRCA] BC-654 Antenna challenge
Robert Downs
wa5cab at cs.com
Sun Jan 21 13:04:23 EST 2018
Mark,
The AS-2259 manual is TM 11-5985-379-14&P. It says that it was designed for use with HF tactical radio sets designed to feed a 15’ whip antenna. Specifically, it fits directly onto the RT-671/PRC-47. There was an adapter MX-9313/GR to adapt it to heavier radios such as AN/TRC-75 (sort of a ground version of AN/ARC-58) and several others. AN/GRC-106 is not mentioned although the AS-2259 plus MX-9313 would certainly work with that set, as well as with AN/GRC-19 and its derivatives. Power rating is given as 1KW PEP or Average. With a suitable mechanical adapter (not made, AFAIK) it should replace the MP-37/57 and work directly with the BC-654-A.
Someone gave me a PDF copy of the TM. The photos are terrible but the text is OK. I have attached a copy. QSL.net server will strip it off but as I am sending this reply direct to you with CC to MRCA, you should receive it.
Robert Downs - Houston
WA5CAB
From: mrca-bounces at mailman.qth.net [mailto:mrca-bounces at mailman.qth.net] On Behalf Of WW2RDO via MRCA
Sent: Sunday, January 21, 2018 10:36 AM
To: mrca at mailman.qth.net
Subject: [MRCA] BC-654 Antenna challenge
I know that the American, British and German Army first started using NVIS antennas for some of their HF radios during World War Two. So far, I'm having trouble finding much information about how far each military went as far as NVIS antenna use, or any photos of any WW2 vintage antenna.
So here's what I'm trying to build. I'm looking to build an NVIS antenna for the BC-654 using only material available during WW2. That would include any balun or any additional antenna tuner to be used with the radio, if they are needed. I am unaware of any issue NVIS antenna issued for the BC-654. Particularly concerning is the fact that the BC-654 did not use coaxial feed line for the antenna. I know the AN/GRC106 had an NVIS antenna, the AS-2259GR , but I see that the AN/GRC106 used a coax antenna feed line. I am not sure that the AS-2259GR antenna, even if I could find one, would work with a BC-654.
Mark D.
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