After last night’s weekly Wednesday night net a couple members met up on our 70cm repeater to test out sending and receiving some SSTV images. This was inspired by listening to the W3HZU Keystone VHF Club net over echolink who held an SSTV net Tuesday night at 8pm.
Two images were transmitted and received in our test. The first was sent using mode Scottie 1 and the second with Martin 1 which seem to be fairly common modes, but we are keen to try others to compare. One issue to be aware of is the repeater time out setting (3 minutes?) so using a mode which takes more time may time out the repeater (and interrupt the transmission) which happened in one case on the W3HZU net.
You can get involved with SSTV with just a smartphone and a radio, at least to decode images. There is an android app to send them as well which we haven’t tested yet. An important thing to understand is that the smartphone apps are decoding sound (and creating sound), to use them you hold the phone near your radio which is receiving the tones over the air to be decoded or transmitting the tones created by the app. To send images from your PC you may need an additional piece of hardware to interface the radio and the PC (some radios have this built in). Nate is using a SignaLink which seems to work well with his Kenwood TM-V71A and his Baofengs.
Applications for SSTV
For Apple iOS (not free, $2.99!): SSTV Slow Scan TV – this app claims to transmit and receive (untested)
For Android: Robot36 – this app is receive only, but the maker has another app which supposedly can transmit as well.
For Android: SSTV Encoder – this app will transmit images. Its simple, but even offer an option to overlay text on the image like the desktop applications do.
For Windows: MMSSTV – pretty much the standard application for SSTV on Windows
For Linux: QSSTV – Nate uses this on Ubuntu
For Mac OSX: Multiscan3B – not tested, but its the only one Nate could find