I bought a couple of Rx's really cheap off eBay. They just say TurBorix FM/PPM and are 6 channel. There is a website labeled on them. It is

[link]http://rvminc.net[/link]

However, the Rx's are not listed there.
They look like they are micro. I need to get some crystals and I'm not sure if they take dual or single conversion. I want to use a 30 channel crystal in one, and a 46 in the other. I know they take the standard size futaba crystals and not the micro. Also, will a micro Rx's work OK in a trainer plane with an OS LA 40 engine? The whole Rx just measures 1 3/8 X 1 inch. So it is very small. They were not sold as micros, but what else could they be?