RA17 page 6

I planned to attack the 1st VFO next, but to gain access to it and in order to remove it, I first had to remove the calibrator, which I suspected was out of alignment. Instead of one well-defined zero-beat every 100KHz I was hearing three! Thus it followed that I should probably ‘do’ the Calibrator next. This definitely is the easiest of all the modules to work on. As can be seen from the photographs, I have not really standardised on replacement components, choosing instead to use those that were at hand. Note for instance the large 1M resistor and three different types of capacitor. Following refurbishment, the calibrator was easily realigned and has worked flawlessly ever since.