test equipment | Electronics Repair And Technology News

BR-6 Geiger – Muller Meter Repair

Jestine Yong — Sat, 29 Aug 2026 13:02:09 +0000

Recently I tested the radioactivity in my home and on my balcony with my quite cheap BR-6 Geiger-Muller tester. But the values it now displayed were extremely high up to 100 µSV/h. Which should be normally around 2.10 µSV/h at max. Below screen-copy shows most likely the newer 3.0 […]

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Almost Brandnew Uni-T UT116A Unexpectedly Is Defect After Hardly Been Used In The Past Years

Jestine Yong — Sat, 16 May 2026 09:48:51 +0000

In the past a brandnew Uni-T tweezer tester, model UT116A, was received with a bad slider switch knob, that immediately got broken and failed after it was tested. And without any warranty from seller or refund from Aliexpress afterwards it needed to be fixed by replacing the from the start bad […]

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Blue Ring Tester Goes Packing Up

Jestine Yong — Sat, 13 Dec 2025 05:17:44 +0000

This my blue ring tester stop functioning, so I decided to take it for checks. I did wonder why it pack up after a few years of use, for the fact I hardly use it, we all know we don’t frequently use it as other tools. So open it, having […]

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DY294 Supertip To Safely Test Small SMPS Adapters

Jestine Yong — Sat, 16 Jan 2021 12:41:20 +0000

I always wondered if there was a safer and easy way to test small smps power adapters without having to connect them to the dangerous deadly AC power lines anymore. And with all the analyzing tools in the electronic engineering world if such a tool maybe already existed? The best tester we know about which […]

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Building New Tools For Our Man Cave

Jestine Yong — Tue, 23 Jun 2020 12:07:37 +0000

Being the electronic engineers we are, we always are trying to expand our tools, test equipment and test methods. This way making new things possible and saving time when we are fixing faulty equipment. It often doesn’t even have to cost much to build new tools. […]

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How To Make Your Own Audio Signal Injector

Jestine Yong — Fri, 23 Jun 2017 07:51:49 +0000

Recently I had some extra time thus I had built one Signal Injector which can make troubleshooting easier for Audio System and Amplifier Devices. By googling on the net I found one handy circuit diagram which works on 1.5V only. See the diagram:- I have arranged required parts […]

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A Simple Circuit For Measuring Mains Power Consumption

Jestine Yong — Mon, 05 Dec 2016 00:06:48 +0000

I am sure that in many cases you would like to confirm if the wattage of the equipment under repair you have on your bench is within normal limits, or, at least, to identify that its power draw after a repair stays in its nominal value or […]

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Make your own EMI measurement probes

Jestine Yong — Tue, 25 Oct 2016 00:04:38 +0000

This story started with my pet project. One of those which are never completed for one good reason: it works and I can use it whenever I need it; so the improvements and finishing were always postponed. This project is a programmable frequency generator using a DDS […]

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Not Common To See Duoyi DY294 Tester Taken Apart And Repair-Part 1

Jestine Yong — Thu, 10 Mar 2016 12:45:50 +0000

As a very interested Electronics repair engineer I love using new Test Gadgets and Digital Meters and new Testers in my Electronics Hobby at home. After all they do make our lives easier and repairs less time consuming. And recently I bought the DY 294 which […]

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Not Common To See Duoyi DY294 Tester Taken Apart And Repair-Part 2

Jestine Yong — Thu, 10 Mar 2016 12:44:53 +0000

Click HERE for part 1. After I previously discovered that Q1 C9013 wasn’t working and gave unexpected results on my M12864 Tester I was almost certain that it must be the reason that my LCD still didn’t work. And that was also because Q1 and therefore T1 […]

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