I've done some tests on VLF also, like many others on this group. For antennas i've used a 1.5m x 2.5m 3-turn loop, a 4mx14m 1-turn loop, and coupling to external structures (i won't disscuss this bi
Hello all! The Polish Amateur Radio Union has a new "Poland on Long Wave - 136 kHz Award", which is the second LF award avaliable in Europe. Rules are avaliable at: http://awards.pzk.org.pl/html/136_
I just did a simple test: I took 2 old LW ferrite antennas and brought them to resonance at 1.5kHz [...] Solid copy in WSPR, over a distance of 15m. [...] now try to repeat the same test with both an
People may be interested in the reply from Rod Wilkinson at OFCOM received today. I asked him what OFCOM's view would be. [...] They state that ITU Radio Regs indicate that there is no allocation fo
It's not hard to wind these Dreamer Boys up!!!! They certainly do not have a sense of Humour!! Mal, you need to get an additional license for humour these days :) VY 73 Jacek / SQ5BPF
It is interesting to try to work out what might be possible by induction... [...] have a look at http://www.home.pon.net/785/equipment/transmitting/VLF_transmit_2.htm this experiment used two triang
For me, the power levels for this long DX are getting worryingly high as they will at some point start to cause interference to research activity. [...] a few years ago i asked people doing geophysi
I've attached the spectrum around 8969.9 Hz grabbed for 6 hours. You can just see the dash there. The QTH here is Warsaw, KO02MD. ODX 902km! The whole picture from the grabber is avaliable here: http
I see what u mean. I have checked the freq of interest and concluded that it is not a suitable mode for the narrow 500 kcs slot available to us. I wonder what is next on the appliance operators list.
Does anyone who received DK7FC's signals was using e-field probe antennas like BBB-4???? I used a modified PA0RDT mini-whip. I think i've managed to receive the long dash from the last transmission v
Some live spectrum and spectrogram displays, with distances to DK7FC/P, [...] another one Warsaw (902km): http://acid.ch.pw.edu.pl/~sq5bpf/grabber/ E-field antenna VY 73 Jacek / SQ5BPF
Most people thought a TX loop would not radiate out of a backyard. a few years ago i've tested some very modest setups (no kilowatts and kilometers of wire). in a country area 1 km is certainly poss
PS: I have built a small TX antenna at my new home QTH in Heidelberg. With a TV transformer and my 300W PA (running at 15W DC input) i apply about 2kV rms on a 10m horizontal wire, about 3m above gnd
- What antenna did you use for RX? Loop, e-field probe? i used an e-field probe - Have you tried TXing using grounded electrodes? If so, what range did you achieve and what RX antenna did you use? i
That applies to most EU countries and the UK. This mode is illegal and a good way to terminate a licence. Those using it are at RISK. exactly my thoughts. if everyone rejected this mode on grounds th
How is any mode 'illegal' - apart from in the US where their national organisation seems to have self regulated thenselves to extremes. i have been taught that it is illegal to transmit something th
I have measured SAQ's "backwave" on a few occasions in the past and I think it was about -17dB referred to key-down, about 4kW output. thanks for the info. a 4kW transmitter (but with an antenna ord
- The best DX targets are quite modest: I would like to exceed 1km initially with the TX power I currently have (around 4W). If I could reach G6ALB in the next village 3kms away I would be delighted
In plain english who can receive the alpha dashes and at what strength around EU. unfortunately they are down now, so i can't tell you what is the s/n now. but it's hard not to receive these stations
