Author Archives: Mads Barnkob

About Mads Barnkob

Electrician, experimenter and amateur scientist with experience in industry automation, programming and all kinds of high voltage generating electronics.

A new dedicated high voltage forum!

Hello everyone! The comment sections on my website have grown long with questions, advices and solutions. So I have expanded the site with a brand new forum, on a dedicated domain. We are a group of seasoned high voltage and … Continue reading

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Teardown video of HP SureStore DLT 818 tape backup station

The HP SureStore E DLT Autoloader 818 is a cost-effective high-performance tape storage solution. This system comes equipped with a DLT8000 drive, which transfers data at up to 12 MB per second (compressed), allowing servers to be backed up or … Continue reading

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Mysterious failure of a Siemens mini circuit breaker C6A (5SY41)

From one day to another this mini circuit breaker stopped working, I had been using it wrongly as a on/off switch and was wondering if there was a mechanism inside to disable it after too many on/off switches, as MCBs … Continue reading

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Teardown video of Eaton PowerWare 30 kVA UPS

Here is a video from taking apart 3 UPS units from Eaton PowerWare, these are 30 kVA units that was previously described in pictures and text in one of my earlier teardown articles: http://kaizerpowerelectronics.dk/electronics/teardown-eaton-powerware-30-kva-ups/ 

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Teleste AC2000, teardown of a 862 MHz cable TV amplifier

This Teleste AC2000 is a cable TV amplifier that is configurable through different insert jumpers for setting up attenuation/equalization, diplex filters, return amplifier or a transponder making it remote controllable.  This is a dual 39 dB amplifier in the range … Continue reading

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Kone elevator control/power electronics panel teardown

This is a Kone Elevator control and power electronics panel dated around 1999-2000 according to stickers and test marks. It does not appear to have had a user interface, unless that was connected to the RS232 port. The front reveals … Continue reading

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SSTC and DRSSTC musical modulator

Since Martin from ctc-labs.de decided to close down his website, which was all written in German, I asked him for permission to translate and publish some of his content to keep it online and public for others to use. So … Continue reading

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Kaizer DRSSTC update #7 – Show and tell

While we had the box open for removing the real-time current control, as you can see in the previous post, I did a walk through of how the coil is put together and what parts have been used.

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CM600DU-24FA IGBT – Removal of RTC over-current protection

The real-time current control (RTC) that can found in some IGBT modules is a protection against short circuits in f.ex. motor drives where they could have been used. The conditions on which the RTC acts is however sharing area with … Continue reading

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Kaizer DRSSTC III update #6 – First full power test after removing RTC

After cutting out the bonding wires to the RTC circuit of the CM600DU-24FA IGBT bricks, which we thought could be one of the reasons that we were not able to trip the 1500 A OCD setting, we had a short test … Continue reading

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