Lee, K1VZI communicates with his friend hundreds of miles away through a satellite passing overhead. He gave me a demonstration of how it is done using mapping software and automatic positioning directional antennas. This contact was done in CW mode (Morse code) transmitting on 70cm and receiving on 2m. Notice the frequency shift with dopplar effect and the need to constantly adjust the dials as the satellite is zooming overhead!
Dan Evander, KJ7YBK, lives in a duplex condo and wants to set up a dipole on his roof, but asks Dave for his thoughts on the matter before proceeding. Read more
Testing My Mini 64:1 Half-Wave End-Fed Antenna Transformer. Read more
RQ-84 – the classic “Quad” full-size has ten elements for 10m, eight – 15 m, six – 20 m, and four full-size elements on 40m band. The antenna has a 21 m boom,... Read more
Welcome to the 400th Ask Dave video! Ken, VE7ZY, is having trouble with an 80m dipole mounted very closely to the roof flashing. He is seeking other alternatives. We look at hamsticks, loops... Read more
JIm, W6LG shows how he recently used 2 off the shelf coax switches to connect 2 antennas to his transceiver at the same time. This simple solution replaced a box with vacuum relays, a contro... Read more
Testing the Wadetenna on 7 MHz SSB. Only 500 milliwatts was used instead of the usual 5 watts. Contacts up to about 500km, mostly to portable stations, were made. As expected they were not a... Read more
“Hope (KM4IPF) talks about the Radiowavz Sentinel Expedition Hex Beam that she and her siblings have been using. They have come up with a few time saving modifications. Later in the vi... Read more
DF2020T Radio Direction Finder kit requires minimum assembly for 10~15 Minutes The Stealth DDF2020T/GPS is an economical but very sophisticated Doppler Direction Finder with GPS and can conn... Read more
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