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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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2023 (25)

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25. March - Basement Laboratory Renovation – Teardown Part 2
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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
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01. October - Chinese 1800 Watt Induction Heater – Heat Insulation Test
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2018 (25)

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2017 (23)

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05. November - Teardown of a IBM Blade Server HS22V
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09. October - 5kJ Capacitor Bank Fired at 2kJ Charge
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06. July - New online calculator: Snubber capacitor calculator
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11. May - Nokia Siemens Networks Flexi WCDMA teardown: integrated Doherty amplifier (part 5)
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20. February - Mysterious failure of a Siemens mini circuit breaker C6A (5SY41)
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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
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02. September - Finished Project: Merlin Gerin PM700 Power Meter
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22. August - Winners of a DRSSTC UD2.1 Board
15. August - Win a DRSSTC UD2.1 board for just a like/subscribe
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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!
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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
22. March - Tube Amplifier and Projects Progress Report #1

2009 (2)

21. December - Work in progress
19. October - Moving

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Recent comments

STN December 3, 2023 at 06:16 on 4000 Joule Capacitor BankI think your launcher system is awesome! :) There is...
Mads Barnkob December 2, 2023 at 21:30 on 4000 Joule Capacitor BankHi STN You would properly need a charging resistor, to...
STN December 2, 2023 at 13:41 on 4000 Joule Capacitor BankThanks for your answer Mads! :) this capacitor bank is...
Eric December 1, 2023 at 05:14 on Spiral Coil CalculatorMads, Any chance we could converse via email? I’d like...
Mads Barnkob November 23, 2023 at 19:49 on Spiral Coil CalculatorHi Eric I guess coupling factor is not discussed, because...

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