Originally Posted by
Roelof
It has nothing to do with compatible, there is no compatibility list to find. Basically such issues come from a bad or poor design and most of the time from a switching BEC
I can assure there are compatibility lists out there and it was very painful to manage when servos were still analog, the following is an example from Sanwa that compares their Rx's but it translates back to incompatible analog servos:
https://www.sanwa-denshi.com/rc/comm...e%20180704.pdf
The gist is you need to run new with new and old with old, don't mix match an old servo with a newer ESC and visa versa