10-11-2012, 02:15 PM
I've never had anything with side contact valves in before, all new to me.
This morning I've given it full mains to no apparent ill effect. On the leakage terminals, the neon briefly flashed as I switched ranges, I'm getting less than half the selected voltages. The 100v setting was showing circa 42 volts at the terminals and so on up the range.
Despite cleaning off the existing oil, the large 4uF paper and oil capacitor in the centre of the photos is still weeping. The other large capacitor, is giving some odd readings despite me taking it out of circuit. It was reading over 36uF (it's nominally 4uF) in circuit and 11uF out of circuit on my Peak meter.
I'm not a big fan of changing things dramatically but with this rather prototypical meter I think I'm going to remove these two capacitors and replace them with electrolytics. Firstly, they're clearly not what they were and secondly, I understand the oil they contain isn't too nice and they shouldn't be weeping anyway.
Andrew
This morning I've given it full mains to no apparent ill effect. On the leakage terminals, the neon briefly flashed as I switched ranges, I'm getting less than half the selected voltages. The 100v setting was showing circa 42 volts at the terminals and so on up the range.
Despite cleaning off the existing oil, the large 4uF paper and oil capacitor in the centre of the photos is still weeping. The other large capacitor, is giving some odd readings despite me taking it out of circuit. It was reading over 36uF (it's nominally 4uF) in circuit and 11uF out of circuit on my Peak meter.
I'm not a big fan of changing things dramatically but with this rather prototypical meter I think I'm going to remove these two capacitors and replace them with electrolytics. Firstly, they're clearly not what they were and secondly, I understand the oil they contain isn't too nice and they shouldn't be weeping anyway.
Andrew
