Hi Warren I cant see30kHz being particularly different for propgation in that part of the spectrum. I can see 2nd harmonic trashing WWVB clock synchronisation over a substantial area though, bearing
Alan; Do you think there will be nights of skywave propagation as low as 30 kHz? Without it I don't see my .1 w ERP going anywhere close. BTW; I have a BC engineer friend about 30 miles from here. He
Alan; Will the "skip" be at night like all higher freqs? And the later [early morning] might be best? Bob From: [email protected] To: [email protected] Date: Sat, 1 Mar 2014 19:13:
Your data seems generally consistent with Bob's intended switch-on time: in an early message he said he was switching off to go to dinner, and *intended* to switch back on at 2330. Jim I don't know t
Paul, Great data as always. I don't know the to-from polarity of your phase measurement; but: the slope of phase change and the slope inflection point at 04:30 look generally consistent with what the
Paul, Thanks for great data and analysis. Comment 1: based on a best-guess loose extrapolation from Davies (Ionospheric Radio) pp 382-383, the phase slope and total phase shift shown in your measurem
Paul and VLF / LF group; Very interesting turn of events! Thanks for all your efforts-will be back on again tonight-Bob > Date: Sun, 2 Mar 2014 14:37:36 +0000 > From: [email protected] > To: rsgb_l
Paul; I fell asleep watching TV! Got up at about 0715 and shut things off and went to bed. Glad I let it run as was going to close at 0600-Bob From: [email protected] To: [email protected]
Alan; I am noticing exactly that-groundwave not that good at 29 kHz. Much better at 137 or even 74. Just got report from Kansas where I always put good daytime sigs in on 137-74. Got lot to learn abo
So far as the less robust reception I got this afternoon here in the middle of the continent, there are a couple of other factors to consider in addition to propagation. Probably the biggest one is a
You managed such an amazing signal on 74 kHz after doing so well on 137 that I have great confidence, Bob. Antenna efficiency is significantly lower, no question. It is not going to be a walk in the
! Bob, how accurate is your frequency calibration? Jim AA5BW There is a strong signal received Todmorden UK 53.7N,2.07W at 29499.000 +/- 0.01 Hz. Begins around 00:30 UT +/- 15 mins and continues. Ver
Paul, I believe that Bob is at: NL 42-40-05; WL 77-04-28 Regards, Jim I ran a 24 hour plot giving 2014-03-01 to LWPC to select its built-in IRI parameters http://abelian.org/vlf/tmp/lwpc140301a.gif L
Hi Warren I cant see30kHz being particularly different for propgation in that part of the spectrum. I can see 2nd harmonic trashing WWVB clock synchronisation over a substantial area though, bearing
Thanks Alan for the info and link. Might the vlf reflector guys be interested in our experiments? I think I joined the list but have not been active there, perhaps you could pass on the info? 73& Tnx
I missed a factor of 10 in the calibration. Signal is more like 0.16 fT and noise about 0.01 fT. Here is flux density and phase lead measured at 29499.00000 in 30 minute integrations. Phase lead slow
Paul Here's what he's sending ... http://www.w1vd.com/grabber.html . Jay Analysing in narrower bandwidth, there are small sidebands at +/- 0.00833 Hz so I guess the tx is sending Morse at 120 second
