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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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2015 (12)

31. December - Happy New Year 2016!
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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
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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
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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

Mads Barnkob March 22, 2024 at 17:04 on Nokia Siemens 3G Flexi 2100MHz 50W Amplifier Teardown (part 1 of 3)Hi KIPRUGUT I would suspect lightning or transient damage to...
Kiprugut March 21, 2024 at 16:19 on Nokia Siemens 3G Flexi 2100MHz 50W Amplifier Teardown (part 1 of 3)Your videos are so informing, as a an RF engineer,...
Raimundo March 14, 2024 at 12:27 on ESAB Bantam TBH 140 Welder RestorationDear Sir. I am from Brazil, and have a very...
Mads Barnkob March 11, 2024 at 13:58 on Capacitor Code ChartHi DOMINICK My best guess would also be 1uF 50V,...
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