Roelof, I cannot agree, a Belgian beer can will provide at least 10dB better SNR ;-) Now serious: I have been thinking about a simple but good RX antenna for LF, MF and the lower HF range and you min
Rik, LF, I have run my 300 watt class D Tx at 1 watt ERP on 500kHz & my Mini-Whip is only about 4 metres away & is still working OK. Very solid design. 73, Gary - G4WGT. 2009/12/3 Rik Strobbe <Rik.St
Chris The Decca RX system had a cylinder probe similar to the beer keg., Reduce the C by raising it a few metres higher from deck. C is then measured in half Jars mal/g3kev ground.
Hello Alberto, I have used a large coffee tin (30 cm high and 27 cm diameter), for a passive electric field probe. The capacitance was way to high for active circuitry. Instead a rf transformer wound
Yes, those Trappiste beers are quite interesting, Chimay for example which is available in different signal strengths (QRP..QRO), but I don't believe it is possible to get them in metal cans. As a co
Alberto, LF, I tried that arrangement with my PA0RDT Mini-Whip active antenna inside a large baked beans can, the can being the antenna & the results were a lot poorer than the small 30mm x 45mm of t
Hi Stefan, I am pleased my beacon was useful, and thanks for sharing your results. Other people used my transmission last night and I have been asked to run it again tonight. I work from home and ca
Johan H. Bodin wrote: Yes, those Trappiste beers are quite interesting, Chimay for example which is available in different signal strengths (QRP..QRO), but I don't believe it is possible to get them
I have used a large coffee tin (30 cm high and 27 cm diameter), for a passive electric field probe. The capacitance was way to high for active circuitry. Instead a rf transformer wound on a hefty hig
Hallo Stefan, könntest Du mir den Schaltplan? 73 Uwe, dk1kq Dear Lowfers, It's nice/funny, that my explanations gets such a resonance ;-) I can imagine about the problem of local QRM brought by the c
Hello Stefan, LF I can not overemphasize the possible need to keep the feedline "clean" and free of RFI that may otherwise make it's way to any active whip antenna. My first attempts at deploying the
Hi Mal, g3kev With the capacitance to earth measured in Jars. 73, Chris G4OKW -- Dr Chris Trayner School of Electronic & Electrical Engineering, The University of Leeds, Leeds LS2 9JT, United Kingdom
Hello Stefan, Thank you for your detailed description. I have carried out the same tests some five years ago and arrived also at a length of 30 cm. The wire can be replaced by a 30 x 40 mm piece of c
Use an aluminium beer keg as the probe mounted a few metres above ground. g3kev It would be quite interesting if somebody could try to use, instead of a wire, something with a greater capacity toward
My Conclusion: It seems that a short receiving antenna can bee seen as a capacitive divider out of the capacity between far field and antenna and the capacity between antenna and ground. If the wire
I cannot agree, a Belgian beer can will provide at least 10dB better SNR ;-) I tend to agree with Rik, the best beers I ever drank were those in La Grande Place in Bruxelles, many years ago, when I w
Hi Mike, Bernd, LF, Thank you very much for your transmission yesterday in the evening! I could do very useful tests and improve my little rx-antenna significantly. I'm not sure if anyone who uses a
Aahh! But the Belgians further complicate matters by designing beers whose individual character may be best suited to any one of the number of courses that comprise a fine dining experience at dinner
