Hi all, The 40 Mhtz and 35 Mhtz frequencies are quite close electronically. This means that if you put a pair of 40Mhtz FM crystals into a 35Mhtz set it will work at the new frequency of 40 Mhtz. The receivers with dual conversion will need a dual conversion rx 40 Mhtz crystal.
So is this a bodge? No, it isn't!
My Fleet 40Mhtz RC sets one of which was bought by myself from the shop is labelled 35Mhtz underneath. The box it came in is labelled 40Mhtz.
The 35 Mhtz. Futaba multi channel TX with a 40 Mhtz crystal operates Hitec and other Futaba receivers sold for 40Mhtz use. The same goes for my Fleet equipment.
With the standard Futaba 35Mhtz receivers with a 40 Mhz crystal fitted also work from Hitec dedicated 40Mhtz transmitters.
Remember that you do not have to match a 6 ch. Tx to a 6 ch. Rx. You can operate a 3 ch Hitec Rx from a 6 ch Tx also a 3 ch Hitec Tx will operate 3 of the 6 channels of a 6ch rx, well you may have fun finding out which ones but it is generally channels 1,2 and 3.
The only area I would be careful of, is bringing Fleet rx's into use as these have non-standard servo connections with the red and black transposed, a careless moment here writes off the rx. But a model boat fitted out with Fleet rx and and servos will operate from a Futaba 35Mtz Tx with a 40 Mhtz crystal fitted,
All the above I have tried out except the dual conversion rx and it is all interchangeable as I have described.
Newcomers, by all means go for the 2.4Ghtz sets but the old stuff still works! The crystals are all available on-line.
I do not recycle everything but please do not throw away these beautifully engineered transmitters as they still have a working life in them.