Andy, maybe you're right, see also Planck's formula E = h f. But then, maybe not - consider radiated power from a given antenna height and current Prad = i^2 * 1579 ohm * (h / lambda)^2 which clearly
But since that does explicitly include F^2, it is a moot comparison, that isa secondary realationship. You could use the same argument relating dB to a loop where it scales as diameter ^4 (or area
Thanks Paul for the fix! Well we got this big forbidden bandgap between 135.7 and 8.3 kHz, so the challenge is going to be a big jump rather than a gentle push. But Dex has done it, and I'm pretty su
Prad = i^2 * 1579 ohm * (h / lambda)^2 My 2 dB contribute: h in meters (or ft) lambda in meters (or ft) so (h / lambda) is dimensionless scaling factor confirmed by P = i^2 * R Or not? 73 Claudio ik2
Good idea, I'll try it. I wouldn't like to stand up and justify that to a professor but it could do better than the alternatives - at least BER will always be below 50%. There will still be problems
My earlier decodes of VO1NA, time Eb/N0 Phase 21:00 9.6 30 30 30 30 21:30 13.3 0 0 0 0 (offset 1.8 seconds) 22:00 12.0 0 0 30 30 22:30 10.8 150 150 180 180 And taking further advantage of the time of
take long to exhaust the permutations. And what are the limits at LF? How far do amateur signals go? For that matter, how far does this mailing list reach? How to interest more experimenters... awa
Bob WG2XRS December 12, 2013 02:25 73 WG2XRS de DL-SWL Op65 -43 dB F:9% in nr Wolfsburg QRA locators JO52HP and FN12LP 6246.44 km , Bob bowled a googly that night, right in at the system limit , ook
Actually, each station operator is using his own unique home-grown setup: Transmitters, Andy: DDS with phase ramp, dedicated controller software Domenico: GPS-locked SSB exciter, SpecLab tone with au
Andy, I recall doing a series of 137 kHz experiments with Peter Martinez using PSK, with the sending end being triggered by 1PPS interrupts from my HP GPS receiver. Somewhere here I have the 8051 cod
Hi G, If you change the subject of an email it would help if you changed the contents in the subject box of the email! "OPERA" <> "EbNaut and The Cat / Take 3" Regards, Edgar Moonah, Tasmania.
.. and you can hopefully soon add one more unique RX setup to the list: SDR-IQ with OCXO-locked 66.666 MHz oscillator + SpecLab with wave file recorder tapped at the decimated input to the FFT (this
Also Brian CT1DRP tramsmit phase locked DFCW from Porto using Andy's Synthersiser with RS-232 control, because I wrote the code in Power Basic for Windows, which Brian took a few bugs out of. The cod
