Steve Anderson wrote:Interesting video Harry. Well made unit, PCBs etc., sprayed front panel with neat markings - but no manufacturer's name or logo, (that I could see), so presumably home-made. Only just noticed, the video 'link' does say it's homemade.
Its a beauty ....Yes also looks well made for a home made monitor if it is i noticed on the viewfinder as he is panning the camera over it it says Hitachi ? was there a Hitachi SSTV monitor ?
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The CRT is also quite a rare looking thing, a rectangular faceplate with a P7 phosphor...I can't think of the intended use for these except for SSTV. Modern radars have 'electronic persistence' where the afterglow is generated in RAM and displayed on a standard PC flat screen monitor.
I noticed in the European builds a few used this shape tube ,but i have never come across one nice to see an example .
Dr. Ralph Taggart, the author of "The Image Communication Handbook", is a member here but he hasn't posted in a long time, maybe years.
Good around book on the subject some good stuff floating around on the net ...i knew it was Ralph but didn't know about this book i liked all of it but the stuff on facsimile is great which tends to be over looked .
I like this rotating drum scanner much neater version than mine a while back ...
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.