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Nokia Siemens Flexi 3x70W FXEA 1800MHz Base Station Teardown: Power Amplifier (Part 1 of 3)

2 Comments / By Mads Barnkob / June 5, 2020

Teardown of a Nokia Siemens Networks Flexi Multiradio base station. This have been in service as a 3 antenna system for mobile telecommunications. GSM/EDGE, WCDMA/HSPA and LTE capable. 3×70 Watt output power.

Nokia Siemens Flexi 3x90W FXEB 1800MHz base station teardown: Power amplifier (part 2 of 2)

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2026 (10)

03. August - Exploding the 10m Design DRSSTC: Softstart, Secondary Coil Terminations and Total Annihilation
13. June - Testing the 10 Minute DRSSTC Part 1: UD2.9 Driver and DC Bus Capacitors
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13. May - Kaizer Power Electronics Websites, Support and Memberships!
30. April - ABB AF265-40 265A / 132 kW Contactor Test and Teardown
12. April - Building the 10 Minute DRSSTC Part 1: Finding the Components
21. March - Designing A Complete DRSSTC Tesla Coil In 10 Minutes
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17. May - Building The CERN / NBI Geiger Counter Kit (Teach Your Kids Electronics)
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01. March - 3 kVA Delta Solar Inverter Teardown, the Solivia 3.0 TR
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01. December - Scientific Atlanta (Cisco) 1 GHz Combiner and PSU Teardown
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13. September - APC Back-UPS Pro 1500 VA Teardown
25. August - Teardown of a 3kVA APC Smart-UPS X SMX3000
12. August - NextGEN DRSSTC UD3: Installation, Configuration, Software and Test (Part 2 of 3)
07. July - Teardown of a APC SmartUPS VT 40 kVA
14. June - Fronius IG Plus 2LT-2: 6 kW Solar Inverter Teardown and Analysis
02. June - APC Smart-UPS 1500VA Teardown
19. April - NextGEN DRSSTC UD3: Unboxing, Soldering, Startup and Software (Part 1 of 3)
03. April - Energy Museum Shut Down! I Filmed the Last Public Tesla Coil Show
22. March - Smoke Screen Machine Protect 950 XP – Teardown of a Smoke Cannon!
08. March - APC Smart UPS 450 VA, for Server 19″ Rack 1U, Teardown
23. February - 811A Vacuum Tube Tesla Coil + 1000 FPS Slow Motion Sparks
08. February - ESAB Bantam TBH 140 Welder Restoration
12. January - Server PSU Hack – Dell N870P / NPS-885AB. 12V 71A 870W
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2023 (26)

21. December - Electronics For Kids – LED Christmas Tree
24. November - ABB DCS400 – 900A / 522kW DC Motor Drive Teardown
12. November - Philips Medio 50 kW CP-H X-ray Control Desk Teardown
03. November - Fujifilm PMT26A Photomultiplier Tube Reverse Engineering
12. October - Brandenburg Alpha Series II 5 kV Power Supply
07. October - X-ray Image Laser Scanner Reverse Engineering.
24. September - Philips PCR Eleva S, X-ray Image Scanner Teardown
12. September - Building the Petoi Nybble Robot Cat
26. August - 3x400V Mains Supply Soft Start and Data Monitor
13. August - Cisco Cable TV EGC GaN Segmentable Node A90201, RF Amplifier Teardown
06. August - Scrap Yard IGBTs and MOSFETs from Solar Inverters, Welding Machines and Induction Cookers
02. August - [PAYOUT] Computer Gold Scrap Money WITHOUT Chemicals or Mechanical Processing (Part 2 of 2)
08. July - Computer Gold Scrap Money WITHOUT Chemicals or Mechanical Processing (Part 1 of 2)
04. June - 10 kW Sirio 10000P Solar Inverter Teardown
16. May - Washing Machine Motor Burnout and Controller Teardown
03. May - 50 kW Sedecal SHF-530 X-ray High Voltage Generator Inverter Teardown
24. April - Home Automation: DIY Arduino vs. Airthings View Plus
02. April - Server PSU Hack – Artesyn 7001138 IBM 24R2730, 12VDC 69A 830W
25. March - Basement Laboratory Renovation – Teardown Part 2
11. March - 10 kVA Eaton UPS Teardown – Model PowerWare 9355
23. February - Server PSU Hack – ACBEL FSA021 IBM 39Y7228, 12VDC 38A 460W
11. February - Fluke Helios Plus 2287A, 1500 I/O Frontend, Teardown and Test
29. January - Showa SP-103 Standalone X-ray Head Teardown
13. January - 8 kW Induction Cooktop Teardown
05. January - Intel i5-12600K 4K Rendering PC Build (930€)
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13. December - How to build a Tesla Coil. Design, Theory and Compromises!
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06. November - Cisco Cable TV Optical Node and RF Amplifier Teardown
19. October - TIG & Stick Welder, Migatronic Pilot 1800 Teardown
25. September - Radiometer Copenhagen OSG 42b Oscilloscope Repair, From The 1950’ish
10. September - Old School PLC Drum/Sequencer Programming with Telemecanique TSX Nano PLC
25. August - Teardown of DLP Projectors With 15 Years Between Them
16. August - High Voltage Coffee Mugs Unboxing
08. August - How To Varnish A Tesla Coil Secondary Coil
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28. July - Lightnovo Raman Spectrometer Demonstration At Roskilde Festival 2022
15. July - Project Documentation: Tesla Coil Soft Start Safety Box
05. July - Roskilde Festival 2022 – Science Pavilion Tesla Coil Music at Night 28th June
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23. June - Tesla Coil Show Controller – Battery and Power Supply (Part 8 of 8)
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27. May - Review of Godox LEDP260C LED Flood Light Panel For Video Production
13. May - Large Tesla Coil – Kaizer DRSSTC 3 – FULL POWER 19 kW!
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2020 (72)

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31. July - Portal – Still Alive, on a Musical Tesla Coil
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11. July - Server PSU Hack – HP DPS-800GB A, 12VDC 1000W
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08. May - Teardown of a 5 kVA / 4 kW Eaton EX5RT UPS System
02. May - Chinese 2x50W Bluetooth Amplifier, Or Is It? A Poor Abused TDA7492P Design
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18. April - 3 kW Yaskawa Servo Motor Teardown – Isolation, Day 38
16. April - 3-Phase IGBT Module Teardown – Fuji 7MBP50RA120 From 3 kW Omron Servo Drive – Isolation, Day 36
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12. April - 3 kW AC Servo Drive From a 4 Ton Stone Polisher – Isolation, Day 32
10. April - Variable Isolation Transformer – Isolation, Day 30
08. April - Variac, Auto-, Vario- and Isolation Transformers – Isolation, Day 28
06. April - Hardware, Materials, Salvaged Fittings and Much More – Isolation, Day 26
04. April - Fuses In Power Electronics and Other Fuses – Isolation, Day 24
02. April - Future Projects, Teardowns and Power Electronics – Isolation, Day 22
01. April - Wires, Cables, Busbar and More Wires – Isolation, Day 21
31. March - High Voltage Insulators – Isolation, Day 20
30. March - High Power Plugs and CEE plugs Connectors – Isolation, Day 19
29. March - Salvaged IGBT Bricks From Power Electronics – Isolation, Day 18
28. March - Power Inductors and Inductors In Power Electronics – Isolation, Day 17
27. March - Industrial Components For Tesla Coils – Isolation, Day 16
26. March - Electrolytic Capacitors – Isolation, Day 15
25. March - SCR / Thyristor In Power Electronics – Isolation, Day 14
24. March - Power Diodes and Diodes In Power Electronics – Isolation, Day 13
23. March - 70 kV / 65 kW X-Ray System, Transformer and Inverter – Isolation, Day 12
22. March - Power Resistors and Resistors In Power Electronics – Isolation, Day 11
21. March - High Current Measurements – Isolation, Day 10
20. March - High Voltage Transformers – Isolation, Day 9
19. March - High Voltage Equipment Repair Queue – Isolation, Day 8
18. March - Power Vacuum, Radio and Electron Tubes – Isolation, Day 7
17. March - Induction Heater Power Film Capacitors – Isolation, Day 6
16. March - Heat Sinks, So cold, Much Metal – Isolation, Day 5
15. March - MMC: So Many Large Power Film Capacitors – Isolation, Day 4
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13. March - 25x 350uF/1500V Film Capacitors – Isolation, Day 2
12. March - High Voltage Equipment Catalog – Isolation, Day 1
06. March - DIY 250W LED Flood Light for High Speed Filming, Part 3 of 3.
23. February - DIY 250W LED Flood Light for High Speed Filming, Part 2 of 3.
17. February - DIY 250W LED Flood Light for High Speed Filming, Part 1 of 3.
08. February - Anet A8 3D Printer Upgrades: 12V Power Supply From a Server
06. February - Anet A8 3D Printer Unboxing
29. January - APC RS-1000 UPS Teardown
21. January - DSO138, Not Even Once
11. January - Chinese 150 Watt Induction Heater, Unboxing and Test
03. January - 10 kVA Kjellberg Plasma Cutter CUTi 31 Teardown

2019 (41)

31. December - New Year Special – Yspace? Static Rocket Engine Test! 3 Boosters + Slow Motion
23. December - How To Fix A Broken iPhone
16. December - Julabo ED Heating Immersion Circulator Test and Teardown
08. December - Aethra CCD Webcam Teardown – From Back When Streaming Was Expensive!
25. November - Worlds Weirdest Microwave Oven, From A Weapons Factory – The Husqvarna Cupol
07. November - HP T620 Thin Client – PSU Hack And Windows PC Modification
24. October - ABB TRIO 20 kW Solar Inverter – Unboxing and Teardown
16. October - Analog Panel Meter Shunt Calculation and Custom Scale Design
07. October - Visiting The Expo: HI Tech & Industry Scandinavia 2019
03. October - Chinese 1800 Watt Induction Heater – Horizontal Oven Heat Insulation Test
01. October - Chinese 1800 Watt Induction Heater – Heat Insulation Test
29. September - Chinese 1800 Watt Induction Heater, Boxed Up With Server PSU + Test
26. September - Nokia Siemens Flexi 3x90W FXEB 1800MHz Base Station Teardown: Power Amplifier (Part 2 of 2)
16. September - 750W Victron Solar Project – 60 Days Performance – Part 4
05. September - Nokia Siemens Flexi 3x90W FXEB 1800MHz Base Station Teardown: Power Amplifier (Part 1 of 2)
26. August - How To Make a Stencil For Spray Paint With Cheap Hand Tools
16. August - ESAB Power TIG 200 Welder Teardown
05. August - IBM ThinkPad A20p, from 2000. Vintage Computer Teardown.
27. July - Teardown of Danfoss VLT6000 4kW Variable Frequency Drive
17. July - Floppiclene! A Electronics Cleaning Relic of the Past.
09. July - Siemens Polyphos 30 X-RAY Inverter and Control Panel Teardown (Part 3 of 3)
30. June - Siemens Polyphos 30 X-RAY Collimator and Image Plate Teardown (Part 2 of 3)
21. June - Siemens Polyphos 30 X-RAY Head 125kV Teardown (Part 1 of 3)
12. June - 750W Victron Solar Project – Power wall and 8 days performance – Part 3
04. June - TIG welder teardown. ESAB TIG Caddy 1500i
22. May - 750W Victron Solar Project – All 3 panels test – Part 2
08. May - 750 Watt Solar Project – Test Setup – Part 1
24. April - 3 new MIDI videos with Kaizer DRSSTC1
21. April - Teach your kids electronics
31. March - Teardown of a GE LP-33 10kVA UPS System
24. March - Chinese 1800 Watt Induction heater, 10 minute stress test at 1500W
15. March - 2200 Watt server power supply for induction heating
11. March - Chinese 1800 Watt Induction Heater, 5 Minute Stress Test
09. March - 2000 Watt Laptop Charger for Induction Heating
07. March - Unboxing a Chinese 1800 Watt Induction Heater
01. March - 3x MIDI videos from DRSSTC1 demonstration
22. February - Tesla coil DRSSTC IGBT explosion. 12 days before a show, panic!
13. February - DRSSTC Design Guide Updated With MMC Design Guide
12. February - Video gear & workflow: Canon 5D mk3, RødeLink, FPS1000HD and more
15. January - AC vs DC fuses, High Current, Explosive Destructive Testing and Theory
08. January - Huawei RRU3928 1800MHz Radio Base Station Circuit Analysis (part 2 of 2)

2018 (25)

23. December - Merry Christmas & Happy New Year 2018 (X-ray teardown edition)
06. December - Huawei RRU3928 1800MHz radio base station teardown (part 1 of 2)
22. November - Nokia Siemens Flexi BTS Base Station Teardown: Circuit Analysis (Part 2 of 2)
14. November - Youtube subscription change, please check!
08. November - Moving To A New Lab (Part 5 and 6) Tour And Finally Its Operational
28. October - Nokia Siemens Flexi BTS base station teardown: Power amplifier (part 1 of 2)
16. October - Eaton PowerWare 20 kVA UPS teardown
01. October - GE AMX-II, mobile 110kV X-RAY system teardown
24. September - Hameg 8122 Universal Counter – teardown, repair and test
31. August - 15000$ (1990’s) Sony 3CCD Analogue color camera giveaway! (shipping costs apply)
09. August - Teardown of a Eaton PowerWare 60kVA UPS system
09. July - Huawei RRU3908 base station circuit analysis (part 2 of 2)
02. July - Huawei RRU3908 Base Station Teardown (Part 1 of 2)
07. June - Ericsson RBS 2216 Auxiliary Power Units teardown
05. June - Moving To A New Lab (Part 3&4) Workshop Tours
23. March - Teardown of a Merlin Gerin Pulsar ESV 22+ UPS
08. March - Moving to a new lab (Part 2) New basement lab and workshop tour
16. February - Moving to a new lab (Part 1) Old basement lab tour and future projects
12. February - Taxi Radio Basestation teardown – UHF/VHF Storno radio
08. February - Computer scrap gold money WITHOUT chemicals or mechanical processing, part 2
02. February - Computer scrap gold money WITHOUT chemicals or mechanical processing
01. February - How I came to build a 4 meter spark generating Tesla coil, a technical story from 2008 to 2016.
26. January - FPS1000HD high speed camera unboxing and first impressions
17. January - YouTube removes monetization for all small channels!
10. January - Building the OpenTheremin V3

2017 (23)

31. December - Happy New Year 2018 Slowmotion Special!
18. December - Teardown of a Medium Voltage Fuse (7200 V / 200 A)
01. December - Taking a look at the Toshiba Toughbook CF-18 vintage computer
23. November - 5kJ Capacitor Bank Fired at 12kVDC / 3.5kJ Charge
05. November - Teardown of a IBM Blade Server HS22V
26. October - Ericsson Radio Base Station RBS3206 teardown
09. October - 5kJ Capacitor Bank Fired at 2kJ Charge
28. August - MIDI modulator for DRSSTCs
13. August - Hacking the IKEA 2000 Watt Induction Cooktop, Measurements (Part 2)
24. July - Hacking The IKEA 2000 Watt Induction Stove, Teardown (Part 1)
06. July - New online calculator: Snubber capacitor calculator
02. July - Ericsson Radio Base Station RBS6000 teardown
11. June - Ericsson Radio Base Station RBS3202 teardown
20. May - 5kJ capacitor bank, 1.5kJ BANG test at end!
16. May - To all electronic enthusiasts!
11. May - Nokia Siemens Networks Flexi WCDMA teardown: integrated Doherty amplifier (part 5)
01. May - Nokia Siemens Networks Flexi WCDMA Teardown: Power Amplifier (Part 4)
23. April - Kone elevator 45 kW motor drive teardown
17. April - Kaizer DRSSTC IV – A High Impedance Primary Circuit Experiment
08. March - A new dedicated high voltage forum!
01. March - Teardown video of HP SureStore DLT 818 tape backup station
20. February - Mysterious failure of a Siemens mini circuit breaker C6A (5SY41)
09. January - Teardown video of Eaton PowerWare 30 kVA UPS

2016 (24)

18. December - Teleste AC2000, teardown of a 862 MHz cable TV amplifier
13. November - Kone elevator control/power electronics panel teardown
09. October - SSTC and DRSSTC Musical Modulator
02. October - Kaizer DRSSTC III update #7 – Show and tell
18. September - CM600DU-24FA IGBT – Removal of RTC over-current protection
12. September - Kaizer DRSSTC III Update #6 – First Full Power Test After Removing RTC
06. September - Astro HVO-Vario G 38, teardown of a 862 MHz cable TV amplifier
02. September - Finished Project: Merlin Gerin PM700 Power Meter
01. September - Finished Project: 3 Phase 13A Lübcke Variac
22. August - Winners of a DRSSTC UD2.1 Board
15. August - Win a DRSSTC UD2.1 board for just a like/subscribe
11. August - Nokia Siemens Networks Flexi WCDMA Teardown: Antenna (part 3 of 3)
02. August - Nokia Siemens Networks Flexi WCDMA Teardown: Power Amplifier (Part 2 of 3)
10. July - Nokia Siemens Networks Flexi WCDMA Teardown: System Station (Part 1 of 3)
01. July - Ericsson RBS 2216 900 MHz base station teardown
23. June - GSM 900 MHz power amplifier teardown
15. June - Photomultiplier Scintillation Experiment
20. May - New Youtube channel and Google+ page!
03. April - Kaizer DRSSTC III update #5 – First full power light!
01. April - Reverse engineered AGFA photomultiplier tube module
28. March - Teardown – Eaton Powerware 30 kVA UPS
03. March - Teardown – Schneider Electric Frequency Inverter ALTIVAR71
17. February - New online calculator for IGBT gate drive
24. January - Kaizer DRSSTC III update #4 – First light

2015 (12)

31. December - Happy New Year 2016!
15. November - Kaizer VTTC III article added
10. October - Small Solar Panel Project Added
25. September - Articles updated with new pictures
16. July - DRSSTC III update #3
12. June - 100 Watt 6P45S amplifier update #2
29. April - 100 Watt 6P45S Tube Amplifier Update
16. March - DRSSTC Design Guide Update #3
23. February - DRSSTC Design Guide Update #2
16. February - DRSSTC Design Guide Update #1
31. January - Another LCD TV repair
29. January - Writing process and site updates

2014 (6)

31. December - Happy new year!
26. September - File archive added to the site
24. June - Project updates #3
20. April - Kaizer DRSSTC III Tested at 1500 Ampere Peak
21. January - uRADMonitor live from Odense, Denmark
04. January - 100 Watt output from 6P45S tube amplifier

2013 (5)

08. December - DRSSTC III update #2
03. December - 6P45S Tube Amplifier Prototype
14. June - TL494 Flyback Driver
28. May - DRSSTC III update #1
18. January - Royer Induction Heater – First Test

2012 (6)

30. October - Another 27″ LCD TV Lives Again!
11. August - 4000 joule capacitor bank fired at maximum energy
05. August - First shot with 4000 joule capacitor bank!
02. June - Finn Hammer and Daniel Uhrenholt show in Fredericia, Denmark.
14. February - Kaizer DRSSTC II playing Doom 1 – Episode 1
13. January - Kaizer DRSSTC III – progress update

2011 (9)

25. November - MMC calculator added to the online calculators
11. October - 30 Watt EL34 Stereo Tube Amplifier Done
17. September - Kaizer DRSSTC II – Upgraded and Kicking!
04. September - How to repair a LCD TV
04. September - The Spark Killer!
04. August - homopolar motor
22. July - Kaizer DRSSTC I, updated with schematics
01. July - 30000 unique visitors in 20 months
27. June - Isophon Speaker Progress Update #2

2010 (5)

15. November - Kaizer DRSSTC I is Alive!
25. August - Demonstration of Thrige power station
03. August - 10000 Unique visitors in 9 months!
21. April - 2W Tube Amplifier, Water Bridge and Plasma Globe Articles Added To Website
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2009 (2)

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Recent comments

Mads Barnkob
April 30, 2026 at 15:07
on 3 kVA Delta Solar Inverter Teardown, the Solivia 3.0 TR
Hi Kasper If you are lucky and have good eyes,...
Kasper Jepsen
April 29, 2026 at 07:06
on 3 kVA Delta Solar Inverter Teardown, the Solivia 3.0 TR
Hi, You do not by any chance have the part.no...
Mads Barnkob
April 21, 2026 at 20:49
on Kaizer DRSSTC III
Hi Angelo They are slightly slower than a CM600 brick,...
Angelo Kaiser
April 20, 2026 at 07:16
on Kaizer DRSSTC III
Hi Mads, is it possible to use these "FD1200R17KE3-K" IGBT...
Mads Barnkob
March 25, 2026 at 20:25
on Kaizer DRSSTC VII
Those are designs and ideas, in a folder on my...

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