ARRL

AA6E

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

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Forums demoted? Aug 18th 2013, 18:36 10 1,620 on 28/8/13
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Operating Furniture Aug 17th 2011, 01:52 10 5,255 on 27/12/12
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General Comments Jul 24th 2011, 21:46 22 9,254 on 29/7/11

Latest Posts

Topic Author Posted On
HT Question W0SJF 5 days, 22 hours ago
I would expect a "tri band" HT to cover 144, 220, and 450 MHz VHF/UHF bands for transceive. Some units might have an HF receive capability also. There may be some units that transmit on the 28 MHz (10 m) band, but that band (in low sunspot years) behaves almost like VHF. THere are also some low power HF HT-like products.

"Real" HF operating in current conditions means the bands from 80 to 15 meters and power levels of up to 100 Watts. So you're advised to look at rigs that cover that range. There are a lot of older rigs available used. I would prefer the earlier non-digital rigs, like the TS-520/530 or the FT-101. You can get them for less than the cost of a Japanese HT.

73 Martin AA6E
Old call signs. gdwebb 2 weeks ago
Check https://archive.org/details/@callbooks or search for 'amateur radio callbook archives'.
Solar Array Interference NS6Q on 16/2/17
No installations nearby, so no problem yet. It is something to worry about, however. Check the April 2016 QST for K1KP's experience. A quiet installation is possible, if you take great care, but a typical installation is likely to be a problem. I would never take the risk myself (unless the installer could guarantee no RFI), but there's nothing to stop a neighbor from doing it.

You can always restrict operating until after sundown -- or maybe have a kill switch that shuts off the system while you're operating. We need more real-life data on how hams are dealing with these issues!

Good post.

73 Martin AA6E
Swapping out xtal - power on or off? KE0KCG on 19/1/17
The safest thing is to power the radio down, but chances are your procedure is OK, too. Be careful of possible high voltages inside the radio.

73 Martin AA6E
How exactly does a CW rig work? KE0KCG on 19/1/17
Chris -

For CW reception, the receiver mixes the incoming signal (a pure RF frequency, with on-off keying) with another frequency, called the "local oscillator" -- or in older rigs, the "beat frequency oscillator". (A mixer generates a signal having a frequency equal to the difference or sum of two input signal frequencies.) The local oscillator is more-or-less the frequency that your receiver tuning dial reads. (I'm simplifying here.) If you tune 500 Hz off from the incoming signal, you will hear a 500 Hz tone, with the same on-off keying. As you tune slowly back and forth, the tone frequency will vary according to the offset from the incoming signal.

I hope that helps a little.

73 Martin AA6E

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