I know nothing of receiver clipping but low receiver voltage can be monitored by using a MAS volt logger. This device has three functions :

1 It displays voltage in real time as sensed on the receiver power bus.

2. It records and displays the LOWEST voltage sensed during the flight which would be some help in diagnosing soft elevator response due to stalled servos with the associated voltage drop caused by stalled servos.

3. It records and displays any instances of receiver drop -out. The LED display is used to reveal the exact number of drop-outs, if any.

I have one of these units on each of my aircraft and it is an invaluable tool to ensure the proper functioning of receiver power supplies and the integrity of radio reception.

Sorry to hear that Vern had problems with his F4 due to a faulty receiver switch but, in the interest of flight safety, shouldn't all high power, high value models have TWO batteries and receiver switches ?

(according to Don Moden of Don's Hobbies the greatest cause of crashes after pilot error is 1. Batteries, 2. switches. )
David Gladwin