Tag Archives: Teardown

Huawei RRU3928 1800MHz radio base station circuit analysis (part 2 of 2)

The RRU3928 is an outdoor remote radio unit. It processes baseband and RF signal data. With the Software Defined Radio (SDR)technology, the RRU3928 supports the dual-mode operation of any two modes of GSM, UMTS, and LTE through software configuration modification. … Continue reading

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Merry Christmas & Happy New Year 2018 (X-ray teardown edition)

Pictures as promised: https://highvoltageforum.net/index.php?topic=523.0 Teaser for the upcoming teardown videos of the Siemens Polyphos 30 x-ray machine, complete with control panel, inverter, collimator, detector/grid plate and x-ray head. Never miss a post, subscribe to email notifications on kaizerpowerelectronics.dk, find it … Continue reading

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Nokia Siemens Flexi BTS base station teardown: Circuit analysis (part 2 of 2)

Circuit analysis of a Nokia Siemens Networks Flexi BTS base station. This have been in service as a 6 antenna GSM system for mobile telecommunications. GSM/EDGE, WCDMA/HSPA and LTE capable. 2×40 Watt output power. If you missed part 1, see … Continue reading

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Nokia Siemens Flexi BTS base station teardown: Power amplifier (part 1 of 2)

Teardown of a Nokia Siemens Networks Flexi BTS base station. This have been in service as a 6 antenna GSM system for mobile telecommunications. GSM/EDGE, WCDMA/HSPA and LTE capable. 2×40 Watt output power. also a picture of me pointing at … Continue reading

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Eaton PowerWare 20 kVA UPS teardown

Here is a little quick, dirty and early morning junk yard teardown of a 20 kVA Eaton PowerWare UPS system. I have earlier taken some of these systems apart and you can see the differences from there photo galleries: File … Continue reading

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Hameg 8122 Universal Counter – teardown, repair and test

The Hameg 8122 is a programable universal counter / timer that has 3 inputs. Channel A and B from DC-150 MHz at 300 Vp-p and channel C from DC-1.6 GHz at 5 Vp-p. I accidentally broke a knob off the … Continue reading

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15000$ (1990’s) Sony 3CCD Analogue color camera giveaway! (shipping costs apply)

As a part of Dave from eevblog gave me the opportunity to reach a larger audience through the guest videos, I hoped that I found a new owner for this camera and that it would bring something good to another … Continue reading

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Teardown of a Eaton PowerWare 60kVA UPS system

This is the teardown of a large 2x 60 kVA Eaton UPS system, first is the teardown video and below are some pictures and a little description of the components. Here is a picture of a single 60 kVA system … Continue reading

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Huawei RRU3908 base station circuit analysis (part 2 of 2)

The Huawei RRU3908 is an outdoor Radio Base Station with one to four carriers and one to six sectors at 20/40 Watt RF output power per carrier. Central Processing Units Network communication is handled by a Freescale MPC8321 PowerQUICC2 CPU … Continue reading

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Huawei RRU3908 base station teardown (part 1 of 2)

The Huawei RRU3908 is an outdoor Radio Base Station with one to four carriers and one to six sectors at 20/40 Watt RF output power per carrier. Part 1 is the teardown itself with a walkthrough of different design highlights. … Continue reading

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