johnb

I have recently purchased a Dragonfly without transmitter. The Dragonfly
does use PCM...
The guy supplied me with a 35.180MHz TX crystal to match the one on the (all
singing and dancing) receiver/controller board.
I have a Futaba PCM 1024 7UAPS running on 36.530 MHz
I tried using the 35MHz crystal in my TX module however no luck...

Just in case anyone is reading this and may help...

I tried using the original Dragonfly controller which I borrowed.
Unfortunately I could only
get hold of a 72Mhz version, in which I plugged in the supplied 35.180TX
crystal. The
tail rotor started spinning but the servos did not seem to work properly. As
I moved the sticks around the main rotor began spinning although everything
was out of control o I unplugged it.

Then, I tried my 36MHz RX crystal in the dragonfly receiver board with my
36MHz transmitter but that did not work

Then I re-soldered the 35.180 receiver crystal on the dragonfly and tried a
Futaba 35.180 TX crystal in my transmitter but that did not work either.

In all cases when I used my controller I switched between PPM and PCM just
in case.

I am running out of options.

I may need to get hold of a 35MHz Module to fit in my Futaba FF7 PCM
transmitter. If anyone can recommend a distributer that is willing to
freight to Australia please post !!!

kevin russell

I have a Futaba Field force 7 super transmitter with a 40mhz and a 35mhz
module, the 40mhz modual will work but with a more limited range on 35mhz
which is a change of 5mhz so I would assume your 36 set will work at least
enough to try the reciever on the bench
Kevin

kevin russell

I have a Futaba Field force 7 super transmitter with a 40mhz and a 35mhz
module, the 40mhz modual will work but with a more limited range on 35mhz
which is a change of 5mhz so I would assume your 36 set will work at least
enough to try the reciever on the bench
Kevin

johnb

It doesnt work at all...

I thought that perhaps the hobby shop could replace the crystal on the
dragonflt receiver with a compatible 36mhz crystal and then tune the
receiver to work on 36mhz

But now, I am beginning to believe that the PCM used on Futaba is not
compatible with the dragonfly receiver in which case the 35mhz module will
not help and neither will retuning the receiver ??