[AMSAT-BB] Re: Linear Tuning and Doppler

Unlike a cosy shack, the temperature of a satellite can change dramatically during the orbit. +30 degrees down to -20 degrees C is not unusual for a 1U cubesat and you will get drift as a result.As the satellite size increases and you have more solar cells, (and thermal mass) you may be able to devote more power to keeping the frequencies stable....It's all a trade off which sometimes works but sometimes does not. 73 David G0MRF

To: amsat-bb@amsat.org Sent: Mon, 29 Aug 2022 19:39 Subject: [AMSAT-BB] Re: Linear Tuning and Doppler

On 8/29/22 12:53, Calvin McDonald wrote:

Why are the transponders not designed to hold the frequencies more exact??

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