On 12/31/2024 5:21 PM, David Lowry via
groups.io wrote:
All this is very impressive. When I first saw these HF aprs
threads I thought I might have to replicate one of those Harris
NVIS magnetic loops but a Shark stick is so simple and cheap.
And in either case a high Q antenna is no issue when you are
sitting on a single frequency. I¡¯ll likely order a stick and try
to get in on the fun. I¡¯m in E. WA.
Thanks to all of you for the inspiration and Happy New Year.
David, KE7RGP
_._,_._,_
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The mag loop does have one major advantage.? It's so enormously
hi-Q and narrow-banded that it acts as a pre-selector for the
transceiver's receiver.? If you want to dedicate one radio to 30
or 40 meters APRS exclusively, and use another HF rig for voice or
other digimodes on other HF bands you can do it.??
My experience here with a home-brew 30-meter mag loop (effective
bandwidth about 10 KHz) connected to a Yaesu FT-891 is that I can
run my other HF radio on any HF band other than 30 meters without
the slightest effect on 30M receive.?
Stephen H. Smith??? wa8lmf (at) aol.com
Skype:??????? WA8LMF
EchoLink:? Node #? 14400? [Think bottom of the 2-meter band]
Home Page:?????????
New? 30 Meter?? APRS-over VARA? Frequency
As of 1 Jan 2025.?? Details Here:
????
- APRS over VARA? --
??
"Studio B" Ham Shack on Wheels
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