1.2. Worn out potentiometers

Amplitude and offset potentiometer tend to wear out after a few years of frequent use. They can be replaced by experienced users. For the offset potentiometer we use:

• Vishay - Spectrol Modell 534 (E106.700) 10k

but any other potentiometer with the same specs should work.

The amplitude potentiometer is logarithmic and needs to be modified so that the shaft length is cut down to 6mm. The model number is:

• Piher - T16SHM04N-103B

The potentiometers can be supplied by TOPTICA on request, but one might find it more convenient and cheaper (international shipping costs) to obtain these parts from a local supplier.

In order to preseve the amplitude potentiometer we recommend to use the trigger cont./ext. switch in order to disable the scan.