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xiangcai @xiangcai - 4mo

there are households which are still using analog antennas in Germany

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xiangcai @xiangcai - 4mo

just did a bit research on this topic. there are in total 2.7 million ham radio stations. and it's quite easy to pass exam and get a license from government. awesome

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xiangcai @xiangcai - 4mo

cool. how many non-encrypted signals are in the air👀

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semisol @semisol - 4mo

all of it must be unencrypted in a bunch of countries in ham spectrum

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semisol @semisol - 4mo

or anything that “obfuscates” a message’s intent, but it does not apply to authentication of messages

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xiangcai @xiangcai - 4mo

ok... https://www.perplexity.ai/search/8771f4d9-0028-482e-8e5e-2a834a12cc33

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xiangcai @xiangcai - 4mo

damn perplexity shares whole thread😂 anyway, government not allowing encrypted ham radio is wired

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xiangcai @xiangcai - 4mo

looks like in ISM (Industrial, Scientific, and Medical, license-free) bands, encryption is permitted and legal for personal use. ham bands are strictly encryption prohibited. tricky point is, ISM and ham share some frequencies, however ISM has priority if conflicted.

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semisol @semisol - 4mo

ISM you can do anything within legal limits, unless it’s jamming sometimes you are forced to cooperate as well with other devices (TPC or something like that)

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xiangcai @xiangcai - 4mo

looks like a loophole but good👀

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semisol @semisol - 4mo

if encryption was illegal within ISM then WiFi would not exist

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010df - 4mo

I've been meaning to work on figuring out reticulum on 7mhz ISM. The big win would be NVIS type coverage, kinda like 40m js8 without a #hamradio license. Massive range with a single transmitter, hundreds of miles to global with the right atmospheric conditions. The big downsides would be antenna size compared to 900mhz ISM like #meshtastic and much more coverage variability over the course of a day and day to day.

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010df - 4mo

7mhz is nvis possible. Predictable 400 ish mile circle if I remember correctly. That is mostly at gray-line though. 7mhz will come and go depending on solar activity and time of day though. Roughly 40m band but ISM.

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010df - 4mo

Hm. Bigger antenna still but more reliable. I wonder if there is an 80m ISM allocation?

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010df - 4mo

Slightly larger antennas for that than 900 MHz meshtastic.

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