old futaba 2 channel 27mhz AM transmitter question
03-20-2019, 04:38 AM
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old futaba 2 channel 27mhz AM transmitter question
I have an older Futaba FPT-2F transmitter on 27 MHz AM. This is the type that has the big printed circuit board inside. I would like to convert it to 2.4 using a Frsky module. Can anyone help me to find where to solder the ppm and positive and negative voltage leads from the module? I know its just easier to buy a new radio that is modern and has servo reversing but this would be used in a vintage sailboat. Any help would be appreciated. Thanks
03-20-2019, 03:57 PM
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All of the new modern receivers are narrow band. I don't know if they would work with my transmitter. I don't think this transmitter is gold stickered.
03-27-2019, 10:17 AM
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I don't think it matters with AM. I've run modern 27MHz receivers with my wide band transmitters no problem.
BUT: You have to watch out for old transmitter crystals. As they age they slide off frequency. I had to sort through my transmitter crystals.
BUT: You have to watch out for old transmitter crystals. As they age they slide off frequency. I had to sort through my transmitter crystals.
Last edited by grotto2; 03-27-2019 at 10:22 AM.
03-27-2019, 03:41 PM
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I bought a new receiver on the same frequency as the transmitter. So far using it in a sailboat it seems to be working fine. I will pay attention to the information you gave me about the crystals. Thanks.
