HFU HF Underground
General Category => General Radio Discussion => Topic started by: ThaDood on November 14, 2021, 2212 UTC
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Interesting that HACKADAY covered this, but..... https://hackaday.com/2021/10/19/the-low-down-on-long-wave-unlicensed-experimental-radio/
BTW, there are still NBFM Intercoms out there that use the 1750M band, around 175kHz, but many are 10mW, or even less. Still, some of the older ones can be cranked-up.
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Hey Dood,
Very interesting article, but it seems a bit "off" in places.
My Hifer beacon was heard in Kansas and further in . Other Hifers have done quite well and cover large portions of the US at times. MANY supposedly still on air. Definitely the best bang for the buck ! HF super low power can still work to a good receiving station under good conditions. And as you know, at least a FEW low power beacons "show up" all over HF .
Lowfer beacons have also been heard at considerable distances . 18"actives" listed on 2200 M or 1750 meters.
I haven't had any experience with the Medfer rules per se, much of what we did on the BCB was with either super flea transmitters ( one I built had around a ONE inch range , but the audio was fantastic !) or something much "bigger" . We used "whatever" re power and antenna but we always ran "clean" filtering and on an unused frequency, usually in the X band.
MEDer .Only one old listing of a single station.
Betweenfers authorized in Canada ie at 6776 Kc . One single old listing.
49er band on old baby monitor /toy walkie talkie frequencies ie 49.86 Mc. But only one old listing.
Outside of the Hifer and 220/1750 band you really need to look here on HFU or set up ahead of time with a ham friend to copy your transmission .
I'd love put up another beacon on "HF" ( I have a GOOD 8 Mc crystal and the parts ), but as you know, a super low power station really needs a good antenna .Portable /temporary is probably my best bet. Maybe when the cycle comes up a bit.
de K
K