Hi Andy, Using a 2007 issue of ITU-R P.372-9 (latest I've got) the general figures at 10KHz seem to be between 150-165. There are some down at 145 and a much smaller (seasonal) variation to ~175. Jus
Here i agree. And here i understand "dreamers" in a positive and optimistic way, just like children are dreamers! We have written so many mails (including me, of course ;-) ) und could start now just
Hellow, Stefan. With such a condition you'll get about 2.5 uV/m at 100 km. Seems it can be recievid. If there is no atmospheric and industrial noise it should be very strong signal. But all depends o
Yet another 5 dB! Then we have 5 dB over noise at 1000 km (!!!) in QRSS100. In HAM practics we don't need regulary contact. Thus let's take lowest noise level. Certanly this is very rough estimations
From a curve in an old 1981 copy of "Reference Data for Radio Engineers" , at 10kHz (lowest value shown) atmospheric noise is given as being in the in the range 155 to 175 dB kToB. This will have r
Why? It is for 175 dB noise level, not for lowest 155 dB level. For 155 dB it changes to 6.5 uV/m in 1 Hz. In 0.01 Hz (QRSS100) it yelds 0.65 uV/m. 2.5 uV/m is ~10 dB over noise. Right? Regards, Ale
