I have several older Futaba servos. 148,3003,3001.
The radio I use outputs a control pulse every 4ms.
Are those servos OK with that pulse rate?
I have had servo failures lately. I wonder if that is the cause.

That's a very high speed. Those servos were originally designed around an approximate 20 mS pulse rate. The 4mS rate will most definitely cause the servo to operate badly and likely become damaged.

Thanks for your reply.
Unfortunately my eyeballs are old and one of them dont work anymore and the room was dark.
The scope was on 5dms/dev instead of 1ms/dev. so the correct pulse rate is 20 ms.
I guess I will have to look elsewhere for my failures