Hi,
Last week, I received a nice HP 5210A Frequency meter. As usual with equipment from this period, it needed cleaning of the rotary switches (with IPA). Once done, it worked great !
And, today, postman delivered me a HP 339A Distortion measurement set that was lost since February the 4th... Package was in bad shape but the instrument was well packed. Just one broken binding post.
The "meter" portion was not working at all, the culprit was a diode bridge having one side open. Capacitors seems in good condition. I'll now spend some time cleaning it's switches.
Thomas