Hello....Im after a bit of advice...Im trying to work on some rc subs and need 40mhz equiptment but I'm hitting problems getting recievers to work. I have a couple of 40 Meg hitec transmitters that work with 40 Meg hitec recievers in other models so I know they work. I have bought 3 different make recievers from different sellers and fm 40 mhz crystal sets and none seem to work...dual conversion or single makes no difference....Im running out of ideas has anyone got an answer to the problem?
You could try asking about you R/X problem on the Association of Model Submariners forum, see if you can talk to Dave Frost
I had trouble trying to get a R/X for my boats in the end I found that Engel do an R/X that works with my F14
https://engel-modellbau.eu/shop/en/R-C/Receivers-Crystals/Receivers-40MHz/RP8DI-synthesized-receiver-40-MHz-8-channel.html
https://www.theassociationofmodelsubmariners.com