Hello Guys,
I just got back into rc and had a chance to purchase a used F16 ( 55" length). The seller told me that the 5 of the 7( 9 g ) servos got burnt. I replaced the servos but noticed that the ESC is connected to the receiver directly. My question is if the 6V servos get juice from from the ESC which is fed by a 3s battery, Am I going to burn the new servos again due to too much voltage? Do I need to protect the servos with some sort of a volt limiter? I appreciate any kind of help as I have limited knowledge of electronics.
Thanks, Solly [HR][/HR]

Solly
If the radio is connected to the ESC then it has a BEC (battery eliminator circuit) built in which provides a regulated 5V (or 6) supply to power both the radio and the servos.
However if you are driving 7x9g servos I have my doubts whether the BEC in the ESC will be powerful enough.
The fact that the previous own managed to burn 5 servo is a bit of a worry but suggests he was not using the BEC in the ESC at all but powering radio and servos from a separate power supply, either a dedicated high power UBEC or a separate battery.

At this point I am going to add a UBEC unit. What kind or specs should I look for? Thanks.