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RC transmitter transmits on first harmonic
I've got a JR 72 MHz transmitter module that was transmitting a very
weak signal on the correct frequency. I replaced the power transistor and the module worked for a few minutes, but now it transmits a very strong signal on 144 MHz. There is no signal being transmitted on 72 any more. I imagine I've got to get the crystal back into its fundamental mode but I could use some hints. Does anyone have a service manual or schematic for the module? A 2m RC system would be really neat but I don't think it'll be easy to find a receiver. |
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