Hello Doug, over the past decade I have tested small loop antennas, a miniwhip (PA0RDT) and a "big" transmitting antenna for receiving purposes and found that each of them has its own advantages, as
Doug If you want to HEAR the signals with sufficient strength to work normal CW . Large antennas of the kind I mentioned are normal on 160 metres for working long haul DX. Micro RX antennas are only
Goodness yes a terrible man,, could never keep his whiskers tidy always reminded me of Carl Marx but the many quiet evenings spent watching QRSS on 60 Khz using a mini wip antenna using his version o
Surely, the whole point of all this, is that WE ARE Amateur Radio experimenters. Few of us are in an ideal situation to carry out laboratory standard experimentation or even with professional resourc
You are taking about Military and 007 Bond pocket Zappers, I am talking about Commercial LF/MF/HF installations including Coastal stations. g3kev What commercial receiving station is listening to fre
[email protected] wrote: dont you mean a *liquid barretter ?* ** If you say so Bob. I haven't been around as long as you have. Did you know Fessenden personally? Dex
What commercial receiving station is listening to frequencies below 2MHz regularly?. And of course thay have large arrays; they need beam steering, real seripus gain and a capability to generate null
LF es MF Reports from across the pond and other DX locations as far as Tenneesee and Kansas using micro probe antennas are great for QRSS speeds but not suitable for audio reception. Take 160 metres
Not forgetting Zeppelins used Zeppelin aerials as well .. but where they called that then ? From: [email protected] mal hamilton Sent: Tuesday, January 03, 2012 10:43 PM To: rsgb_lf_group@blacksh
What commercial two way LF stations still exist? All that I know of just transmit. Way back when there was two way LF traffic a high level receive signal was needed for the cat whisker detector to wo
Hi Graham At last a man that knows what he is talking about because he has been able to compare a large antenna as described in a low noise environment ie Big signal capture and little or no noise. T
Have to side with Mal on this one From my experience with the 600 Ft , balanced, delta loop, 200 ft per side and the 750 foot long wire at GB4FPR , yes Rx signals where significantly higher than at m
dont you mean a liquid barretter ? Bob K3DJC On Tue, 03 Jan 2012 15:01:46 +0000 Dexter McIntyre W4DEX <[email protected]> writes: > What commercial two way LF stations still exist? All that I know
Merchant ships used inv L antennas slung between two masts and in some cases additional long whips for MF/HF. Aircraft also used inv L and long wire antennas strung between the cockpit and the top of
Yes, agree with that Rik, but the advantage of the small antenna is that it can be moved more easily away from local noise. Chris, G4AYT. -- Original Message -- From: [email protected] Rik
the metal about. Agreed. OTOH I know from a retired Marconi antenna engineer that tuned loops (first shielded later unshielded) in general have been used by the marine for DF. From experience I also
Don't forget, Mal still uses cats whiskers and coherers - that's why he needs large antennas and keeps on asking everyone to use QRO amplifiers and antennas that need 2 acres of ground space because
Clemens It depends what you mean by a reasonable sized loop. A reasonable size might be say 3 metres x 3 metres or more and probably a good enough performer for size and optimised for the frequency o
