Ok Gary, There's 50m of balloon aerial aloft now but one of the 4 ballooons has just burst. It must have touched the wire. Hopefully the others will hold out. I think I may try heavier wire next time
Chris, This sounds good. Trying in 600 is a good starting point and a 50m vertical is fine too. How big are the balloons? Do you use helium or hydrogen? ;-) Using 0.2mm diameter wire may cause some
LF, I am transmitting VLF at present (since 09.00Z) Freq: 8.971 885 kHz Mode: QRSS-10 Ant: 40m inverted 'L' - height 10m Ant current: 0.15A It is too windy to launch the balloon aerial but I shall ho
LF, I have had permission from the Met Office to do some more VLF test transmissions. Time: 0900 - 1200 Z Monday 13th December 2010 QRG: 8.972 kHz Power: 50 watts RF (max) Mode: QRSS - 3 to QRSS - 30
LF, I've wound in the balloons as they had deflated and the aerial wire was sparking to a neighbouring tree top. There are a few minor problems to resolve: The aerial wire passes through metal eyelet
LF, Many thanks to all who have looked for my VLF signals. Apart from significantly increasing the power I'm at a loss now. I have been transmitting QRSS-60 since 10.30 Z on 8.971 885 kHz and have ju
LF, I shall be back to work on Tuesday so tomorrow is my last chance for VLF transmissions for a while. I have added a crystal oven to stabilize the frequency which is at present 8.972 220 kHz I shal
The rx is running gl Victor PA3FNY --Oorspronkelijk bericht-- Van: [email protected] [mailto:[email protected]]Namens Chris Osborn Verzonden: zaterdag 12 februari 2
Chris How efficient is ur mains transformer at 9 Khz, what sort of core, ferrite or laminated iron I assume from what u say you couple your 5 ohm impedence PA to this transformer PRIM and output fro
Hi Chris - been listening since about 6.30 but unfortunately nothing at all from you so far tonight. 73 Chris G3WCD On 27/02/2011 18:45, Chris Osborn wrote: Hello Stefan, Thanks for the good wishes
Hello Chris, I wish you good luck! What will be your antenna current and what is the current maximum TX power? Do you have enough RX stations in a radius of some 100 km? If you want to do a test in
Hi Chris, what sort of 10 MHz OCXO do you have? The little canned industrial types (eg. http://www.kvg-gmbh.de/10.0.html?&L=3 STRG + Klicken, um Verknüpfung zu folgen http://www.kvg-gmbh.de/10.0.htm
Chris An open space or field would be more suitable, its difficult to get a balloon absolutely vertical even under calm conditionx. thermal dynamics, up drafts etc. The OE5ODL balloon was varying fr
LF, I hope to be transmitting soon, at least by 10.00 Z Conditions are not ideal with light drizzle and freshening breeze but we'll give it a shot. The measured QRG is 8.976 642 kHz Thanks for all ef
Hi Chris - here is a shot of your 8976.66 signal this afternoon up here in Toseland IO92vf. The S/N looks to be about 6-7dB. At 19.4km this is not quite far field radiation but certainly outside the
Hi Chris, I think DFCW-600 or even 2400 is a good compromise between a constant carrier and some ID but 60 is probably to fast. Jim received you in less than 2 mHz if i remember correctly. QRSS60 is
