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A comment on Whatever happened to Channel 1?. Parent comment
https://en.wikipedia.org/wiki/Amateur_television
The Hams don't use the Commercial TV frequencies of course, but transmit on the Amateur bands.
See the Wikipedia article for frequencies used (including the bands that you mentioned).
And yes, years ago the Hams built their own gear using vacuum tubes. These days they are building Digital and HD TV.
Do a search on "Amateur TV", it's still a big part of the hobby.
If you hunt around, you will find many books and constructional articles on ATV.
Oh, and to build your own Amateur TV station you'll need the appropriate grade of Ham license.
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https://en.wikipedia.org/wiki/Amateur_television
The Hams don't use the Commercial TV frequencies of course, but transmit on the Amateur bands.
See the Wikipedia article for frequencies used (including the bands that you mentioned).
And yes, years ago the Hams built their own gear using vacuum tubes. These days they are building Digital and HD TV.
Do a search on "Amateur TV", it's still a big part of the hobby.
If you hunt around, you will find many books and constructional articles on ATV.
Oh, and to build your own Amateur TV station you'll need the appropriate grade of Ham license.