Anyone with a shortwave receiver that supports SSB and a computer with a soundcard can decode SSTV signals. I use free software called MMSSTV for this. MMSSTV also generates SSTV signals that can be sent to a radio transmitter, of interest if you're a radio amateur that wants to try out this mode.
Radio amateurs using SSTV tend to stick close to a small range of frequencies so they can find each other. On the 20 metre band they're usually found around 14230-14240 kHz.
Today I had MMSSTV running, monitoring 14230 kHz to see what would pop up. I caught two stations operating in SSTV:
- WB5UXC, Pearlington MS at 2200-2220 UTC with a fair signal. He was in contact with KA0UNB (who wasn't visible to me) and with an N9 station. At 2219 he was calling CQ using a special CQ image.
- XE1RK, Mexico City (D.F.), Mexico at 2221-2230 with a good signal. This station answered WB5UXC's CQ call and they swapped pictures and talked in SSB. Fairly clear picture.
Note that SSTV is different from ATV (Amateur television), where amateurs transmit standard broadcast quality television signals. ATV allows for full video with audio, but is restricted to the UHF bands because of the wide bandwidth needed.