This demo shows how small the HD transmitter can be made.
Still, as earlier posted, it goes through a access/point receiver and not the built in HDTV receiver or tuner.
There are Home/private use DTV transmitters available for sale usually
for schools, company compounds. low power controlled distance transmission.
RF transmission is regulated usually by law mainly in terms of wattage and distance. covered
Now here is a 8VBS modulator the output of which you can send thru a cable connected to you DTV receivers.
To bring it up OTA I believe will simply require an RF amplifier tuned to the broadcast
frequency/channel you decide to use. A 1 watt RF amplifier will more than suffice or a
2N109 NpP RF TRANSISTOR which i sudes fro analog TV trasnmission at the old school.
(I think i still have that historical piece somewhere in one of those jars).
your friendly tV repair guy/ hobbyist can make one for you. buy him a beer afterwards.
I still am straining to understand 8VBS and the mpeg stream over my very much analog mind. i wish some one can walk us thru that the way Malvino explains it http://www.amazon.com/gp/product/007039878X/
A link will suffice. I really want to make one so i can get an HD view on my RC plane.