Hello and thank you for letting me participate in your forum. I am an young service technican and a few of my hobbys are to collect junk, keep old tubes glowing and design new circuits.
Recently i got an large soviet osciloscope tube and this brought me to the idea to build some kind of narrowband TV receiver with it.
My major question to you is if you can suggest me very narrowband modes that fit into voiceband channels. I have espically the idea to build the equipment such that i could not only use it with local signal sources like converters and audio players but also connect it to an CB radio and transmit and receive video signal over the air.
What would you think about:
32 Pixels wide * 48 Lines * 4 Frames per second or alternatively 24 * 32 * 8 , both result in an pixel clock of 6144Hz that is an common 18,432Mhz crystal divided by 3000?
Line sync by making the first pixel blacker than black as common practice, but frame sync by transmitting an half line at peak white that could also be used as an reference for AGC circuits?