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21st Nov 2020, 12:14 pm | #1 |
Octode
Join Date: Nov 2010
Location: Cullompton, Devon, UK.
Posts: 1,435
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Ring (LOPT) tester
Back in the days of the CRT I used to spend hours trying to fault find LOPTX so I built a crude tester which saved me hours and replacement costs, then about 15 years ago I built a twin ic one which has served me well and works on all different types of transformer.
During lockdown I was looking for something to do, having been given some Oak and mahogany off cuts, so thought I would make a little box, the next thing I saw on the bench was a sky + display so decided to build a new ring tester, after making the box cutting hole for display and making up circuit I found the sky + display was incompatible as the diodes were reversed so had to compromise with a led bar display filling hole with filler, it all turned out well in the end costing just a couple of pounds and surplus components. Last edited by Cobaltblue; 21st Nov 2020 at 12:20 pm. Reason: help understand what kind of ring |
21st Nov 2020, 6:54 pm | #2 |
Octode
Join Date: Aug 2006
Location: Stoke-on-Trent, Staffordshire, UK.
Posts: 1,082
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Re: Ring (LOPT) tester
Love it but please explain how it works and a schematic
Trev |
21st Nov 2020, 11:36 pm | #3 |
Moderator
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,864
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Re: Ring (LOPT) tester
Nice explanation and circuit here.
https://wenku.baidu.com/view/ea87f92...7e87197f4.html If you want to discuss this further I suggest a new thread. Cheers Mike T
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Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk |