by Harry Dalek » Fri Dec 23, 2022 8:00 pm
In case you don't know there are 2 analog software programs that do SSTV fax cost you nothing if you need a Quick monitor use the desk or lap top ,i am thinking you don't want to build one but that can be done too one way or another if so !
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.