and rods to the feedback pot causing early wear. To resolve this the output gear in an indirect drive pot servo has been supported on both ends, and a coupler, which reduces the transmission of vibration, is used between the output gear and the feedback pot shaft.

Four of the most popular IC's used in the construction of our radios are the Signetics® NE544 Servo Amplifier, NE5044 Seven Channel RC Encoder, and the NE5045 Seven Channel RC Decoder. The NE5045 decoder is commonly driven by a receiver based on Motorola® MC3361 Low Power Narrow Band FM IF.
This section includes the Signetics® NE544 Servo Amplifier. Later sections will include the associated IC used in transmitter and receiver circuits. The circuit presented here is not intended to represent any particular radio manufacturers implementation but to offer a "generic" example of using the NE544 in a servo.   

Deadband - The resistor between pin 6 & 7 controls the deadband width. The larger the resistor the wider the deadband (Minimum deadband is spec at 1us with 0 resistance).

Servo Throw - The resistor to ground on pin 2 controls the servo throw or degrees of travel (Normally 60 ^o ). A smaller resistor will increase throw (ie. 15 K = about 75^o )A larger resistor will decrease the throw (ie. 22K = about 45^o ).

Optional Driver Transistors - Most of our standard servo's do not use the optional PNP driver transistors as the chip is rated to drive a 500 mA load.