So here I am, doing variable line frequency test and ... phssss ... PHUT ... *BAM* ... followed by a stench wafting about. I looked at what was supposed to be 265V/50Hz sine and found a totally distorted 1Hz, plus lots of heat in my amp which luckily survived.
Turns out the Wavetek 23 function generator became totally "loose" in frequency. Have to wrap up some stuff today so I tried and was able to goose it to 50Hz by cranking it to 995Hz (above 1kHz it completely loses it). But that's a white-knuckle ride because the test runs mostly unattended.
Does anyone know whether these things have a typical pathology that can be fixed? Like this or that cable always comes loose, etc.? I have re-seated the EPROM, battery is fine, re-seated connectors, nada. I do have the manual but diagnosing it from synthesizer to the end will take hours because it's a uC driven instrument.