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Old 8th Oct 2018, 8:45 pm   #24
Sinewave
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Join Date: May 2016
Location: Oxfordshire/Bucks borders, UK.
Posts: 1,604
Default Re: G & E Bradley CT-471

Quote:
Originally Posted by m3vuv51 View Post
All the OC170 transistors check out fine, the issue is with high ESR and leaky caps, the biggest issue though is having the calibration prodedure and voltages etc. though, as the manual I have is for the BJT version not the FET!
I need to get checking my caps.

What I might do is replace the biasing resistor with a trim pot so that I can use silicon transistors as some of mine are shorted, so will need replacing. Then when happy, I'll replace the trim pots with fixed value resistors.

Once up an running, maybe we can go through the calibration together. I'm sure some how we'll work it out.

I've not actually looked in the manual I have, it is one for the C version which my meter is, so hopefully there's something in there.
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