HP 3312A Function Generator - tear down, inspection and repair

In this episode we fix our trusty old Hewlett Packard 3312A function generator. This was built in the early 1990s, where Agilent/Keysight was something else and HP was "The Name" for very well build test equipment. This thing is built like a tank and considering the price tag it was certainly not pointing at hobby lab users (£1800 in 1993) .
I had it for many years and it served me well until recently when it suddenly blew the mains fuse, but a couple of hours work and $1 worth of parts fixed it.
While fixing this one we discovered that the Tektronix 465 now has a complete A-trigger fault. It was a slowly developing fault, getting worse over time, but now it appears it does not trigger at all anymore. So we won't run out of work during the winter time.

On top of that we just got noticed that the property owner wants to move into our house,.... so we need a new place to live, the sooner the better, preferably with a bigger shop ...:-)

The Tek 2245A rescue video is here:
https://www.youtube.com/edit?o=U&vide...

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www.dynoguy.co.uk