Amateur Radio Slow Scan TV Overview

There are a lot of small things to learn to be knowledgeable about SSTV but Rome wasn't built in a day as they say. You'll learn as you go like any facet of Ham Radio. Being a good listener is always a start. Tune in on the action on 20 metres (14.230 or 14.233) and listen in. There's always other beginners or experimenters, so their questions will often answer yours. There are several modes of slow scan which have been developed. Robot modes 12 second B&W to 72 second colour, Scottie modes 1 to 4, Martin modes 1 to 4, Wrasse modes 1 to 2, ATV modes 90 to 188, Colourfax , and I'm sure more on their way as programmers keep upgrading or designing new systems.

If your interested at all, take the time to build up the simply 741 op-amp circuit described in the JVFAX info and run the JVFAX70 software available right here ........ JVFAX70.ZIP (736K) software. This system works great and is simple to setup and use. The interface circuit is made up of only a 741 op-amp, couple caps, and a couple resistors. The interface circuit plugs into a serial port (com port) of any IBM compatible type computer, 386 or up recommended. One connection from the interface to the speaker output and your copying pictures. See articles for details on connections for transmit and more info on the different systems being used. There's even software available to copy and send SSTV using your sound card.

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