[MRCG] HF Ground-to-air comms

amillertkx--- via MRCG mrcg at mailman.qth.net
Sat Sep 13 20:44:30 EDT 2014


A better receiver and antenna directly impacts the ability to hear a weak signal so I think that does factor in. It has been my experience that with these WW-2 radio what if/ would it work questions are best answered by actual field tests. Like when OPE Tom and I tested BC-222 to BC-222 coms and also operational tests with TBY's and MAB's. So.....who's got a plane with HF AM capabilities? Let's try it. 

Sent from my 1944 Westinghouse TBK


> On Sep 13, 2014, at 5:07 PM, Tim <timsamm at gmail.com> wrote:
> 
> Hi Andy!  
> Well I think the determining factor in ground-to-air is not the aircraft transmitter power or the efficiency of its antenna system - the BC-611 still radiates only a very small fraction of that 360 mW transmitter.  Maybe a few milliwatts..
> A center loaded 8 foot whip with a high Q coil, on a large vehicle with reasonable ground coupling is only a few percent at best on 80 meters.  The BC-611 antenna system is probably much less than that.  A '611 on the ground could certainly hear almost anything nearby - but I think that's only half the problem in a 2-way circuit.  No? 


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