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My Century tube tester arrived and after an hour of cleaning up the face plate, I dove in and had a look. There is a capacitor across the meter connections (to smooth out the readings?) and it has cracked.
I plan to replace all the capacitors anyway. But the one in the tester doesn’t jive with the schematic… see pic.Part 2) I have 2 capacitors both rated at .01 mfd., but one is an oil capacitor (larger of the 2) with 1000 wvdc marked on it, the other has 600 vdc. marked on it. see pic.
The ones sold by Justradios are 630v (which may be close enough?) ,but nothing for 1000 wvdc. Is this hard to find? or is there an updated solution.Thanks, Gary
C1 has a schematic value of 200µF and they used a 290µF in the instrument, which is fine since as you said this is for smoothing the signal across the meter, and that calls for a non-critical value, unlike in a tuned circuit.
Any cap rated at 600V can be replaced by a 630V rated replacement. Anything above 600V, but not below, and that is true of all capacitors.
1000V caps are readily available – I Googled 0.01µF 1000V and got lots of hits. You’ll be surprised to see how now small these are compared to the original!
Thanks for all you help Alistair! Everything has been ordered including the 1000v cap!
Regards, Gary
Alistair, If I can enquire, how large were the storage bins that you purchased to hold your resistor and caps supplies? Did you group them? or did you have a separate drawer for each resistor? I saw several different size ones at Can Tire. I’m still in the process of trying to kit out my work shop.
Gary
I think the attached says it all. I believe I got the component drawers in Canadian Tire.
Attachments:
Thanks for posting that! I was wondering how you catagorized everything as it wouldn’t be possible to have a drawer for every different resistor or cap.
Gives me a good idea of how to proceed.
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