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288 points spzb | 3 comments | 3/28/2025, 10:14:00 PM | HN request time: 0.717s | source

1. mschuster91 ◴[3/31/2025, 11:10:00 AM] No.43533582[source]▶

Fun fact: ham radio operators to this day use a similar technique to distribute images - it's called slow scan television.

replies(1): >>43533801 #

2. simondanerd ◴[3/31/2025, 11:41:00 AM] No.43533801[source]▶

Also check out rtty and FT8/FT4 for those interested in other "digital over analog" modes.

replies(1): >>43534032 #

3. flyinghamster ◴[3/31/2025, 12:10:00 PM] No.43534032[source]▶

In this case, continuous GPS coordinates are sent on one audio channel while the other channel is voice.

In the 1980s we downloaded games from the radio