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 …

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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 …

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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 …

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Kaizer DRSSTC III 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. Learn how …

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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 …

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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 …

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Astro HVO-Vario G 38, teardown of a 862 MHz cable TV amplifier

These are highly modular cable TV amplifiers, they are set up by using a wide range of different insert cards with different frequency ranges or options. These are 38 dB amplifiers in the range from 47 to 862 MHz. This …

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Finished Project: Merlin Gerin PM700 Power Meter

Two days ago I conducted the first successful resistive load test of a 3 phase power meter. It can measure voltage, current, power consumption, harmonic distortion and power factor. Read all about the construction and see all the pictures and video …

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Finished Project: 3 Phase 13A Lübcke Variac

Yesterday I conducted the first successful resistive load test of a 3 phase 13 A Lübcke variac stack. It has been been enhanced with safety and monitoring options. Read all about the construction and see all the pictures and video …

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Winners of a DRSSTC UD2.1 Board

Seven users entered the lottery for a board by leaving a comment with a email address. Through a gentleman agreement, they also subscribed to the various channels related to this site. Two random numbers have been drawn between 1 and 7 …

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