Jorge, I use No. 16 multi-strand, tinned, insulated wires for radials. They are soldered to a ring made of 1/2 inch copper pipe that is 2 inches above the concrete pad surrounding my TX vertical. The
G'Day Topbanders, I am not sure how general a conclusions could be drawn from my experience, but I have a set up that is somewhat relevant to this thread, and have done some on the air testing with i
I build all my RX antennas with a relay in the transformer box. The relay, which is powered through the coax, opens the loop and shorts out the input of the transformer whenever the station is switc
At 150' it is really not long enough to work as a Beverage on 160 meters (a Beverage needs to be 1 x wavelenght long, or more, indeed, 3 to 5 times more). That antenna, however, may still be a good l
Doug, You had a great signal here in Miami the other night, so I think your antenna works well (enough). So don't rush out to lengthen your inverted L just yet :-)... But...some believe that a longer
Art, I have tried it (what the heck, why not?). Using a 2m x 2m loop, 1m above average ground: The F/B (better than 25 dB) and RDF (7.8 dB) are the same as a single turn loop. Gain is higher by 2 dB
Hear, hear, That is the strangest part of it: in most contest (except the Stew Perry) all the credit goes to the QRP station, while the hard work is done at the other end. Calling with 1 kW takes th
G'day Gentlemen, I don't think it is "branding" when pointing out a problem with someone's signal. It happens to all of us and we need to know when our signal is not right. N4IS called me once that I
Yes! A July Stew Perry. Unlike the other DX oriented contests, the SP'S scoring is "finely grained", so the scarecity of DX will not result in too much of an advantage to the few "summer-DX-capable"
Here are my experiences from TX3A (and other low-band DXpeditions). On TX3A, for 30 nights in a row, 8 hours each, I had the challenge of copying weak signals through strong, incessant lightning cras
I have tested compact fluorescent bulbs a couple of years ago and found that they were noisy. I have not tried to quantify the level of noise emitted, but it was about S5 on my K3 at a distance of ab
It is marked to comply, but it may not. (Part 15 compliance is self-certified. It would be interesting to test it against Part 15 requirements. I believe that one of our potential defences against th
What made me sceptical was the original posting mentioning that the bulb interfered with an FM broadcast. 73, George _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw
Jorge, A FedEx package has arrived for you from DOC Foster. Are you still in Miami? I hope your visit to FL was pleasant. George _______________________________________________ UR RST IS ... ... ..9
I did that. I was testing a small dual-feed DHDL loop (-50 dBi gain) using twisted pairs removed from a CAT 5 cable. On the bench the twisted pair showed 100 ohm of impedance and a loss of about 2.8
Mike, You are willing to run 2 coax cables and have 2 transformers, but don't want to bother with remote relays, etc. You could simply have a single wire, terminated at each end by a transformer. Run
Herb, It is simple: 2 W output, 10 foot whip wiht loading coil, and a 3000 mile wide perfect ground plane. Easy. :-) 73, George _______________________________________________ UR RST IS ... ... ..9 Q
G'Day Topbanders, I am happy to announce that due the amazing efforts of PY5EG, Atilano, we got all the permits and licenses needed to mount a DXpedition to St. Peter and St. Paul Rocks in the 2012 N