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Old May 07, 2012, 03:07 PM
allgie is offline
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Joined May 2012
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Double horse 9053 TX

Hi there, can anyone tell me if the 27.145 frequency is am or fm on this chopper?

I have a 4 chanel e sky transmitter which I would rather use, is it simple to just put the 27 MHz crystal in and fly the 9053?

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Old May 07, 2012, 04:38 PM
Ribble is offline
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Crash and learn
United States, PA
Joined Dec 2011
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Likely same as my DH9104. ON/OFF carrier modulation, guess you could call it AM. Proper name I suppose is continuous wave.

The receiver is super-regenerative (super-regen) and does not have a crystal. It has a tuned front end feeding what looks like a common base transistor pre-amplifier. Actually works very well considering the simplicity.

The ESky transmitter would have to be on the 27MHz band and if it is ON/OFF keyed carrier, then just a matter of re-tuning the receiver coil at the antenna wire on the helicopter.

However, the DH9053 likely also transmits control information by 4 channels, in 6 bit binary with a parity bit.. ESky transmitter not likely to work. I wouldn't even try.
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Last edited by Ribble; May 07, 2012 at 04:51 PM.
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