Telemetry and monitoring, preparation for next season.

For safety reasons and research I need an easy handling 27 MHz monitor receiver and telemetry set.

The citizenband (27 MHz ,11 m) is used by a lot of people and it is interesting to listen for a period and observe if it's save to operate superregen receivers. Tone modulation does block most of foreign control inputs and worst thing that can happen is my transmitter being over ruled and the plane totally deaf for my signals. Using an auto stabile model with very limited fuel capacity is first choise for try outs next year
For pre flight listening, also coming period, I made a receiver to build in my cap, supply voltage 1.06 a 1.25V and current I < 0.5 mA. The round element is a crystal earphone.
On the photograph the receiver has a 200MHz coil for telemetry purposes. Telemetry is also "Under development". I can exchange the coil for a 27 MHz coil and capacitor for monitoring.

More to come.
Cees