Nokia Siemens 3G Flexi 2.1GHz to 2.4GHz 50W Amplifier Reverse Engineering (Part 3 of 3)

Circuit analysis, reverse-engineering and hacking of a Nokia Siemens Networks Flexi Multiradio base station FRGL amplifier. The user Da_Stier from highvoltageforum.net made a deep circuit analysis of the power amplifier, reverse-engineered how it works, built new printed circuit boards to …

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Nokia Siemens 3G Flexi 2100MHz 50W Amplifier Circuit Analysis (Part 2 of 3)

Introduction I have here a circuit analysis of a 2100 MHz cellular amplifier from a UMTS basestation setup. The initial teardown video can be found in Nokia Siemens 3G Flexi 2100MHz 50W Amplifier Teardown (Part 1 of 3). Video Cellular …

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Nokia Siemens 3G Flexi 2100MHz 50W Amplifier Teardown (part 1 of 3)

Teardown of a Nokia Siemens Networks Flexi Multiradio amplifier. This was for example used for mobile phone base station installations and this particular part is a 2×50 Watt FRGL amplifier. This have been in service as a 2 antenna system …

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Sonos Connect Exploding in Slow Motion 1000fps

A pulse discharge with a peak current of 50,000 Ampere is send through a Sonos Connect. If your audio keeps skipping, stopping or generally playing up, you could have an issue with wireless interference from other devices in your home. …

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TDA7492 Bluetooth Amplifier Exploding in Slow Motion 1000fps

A pulse discharge with a peak current of 50,000 Ampere is send through a TDA7495p Bluetooth Amplifier. I did a review of this a while ago. I am not satisfied with the low audio quality and questionable user interface. This …

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Nokia Siemens Flexi 3x70W FXEA 1800MHz Power Amplifier Reverse Engineering (Part 3 of 3)

Da_Stier, a user from www.highvoltageforum.net has reverse engineered the power amplifier module and this is the documentation and test results. The RF power amplifier teardown can be seen in part 1: https://kaizerpowerelectronics.dk/teardown/nokia-siemens-flexi-3x70w-fxea-1800mhz-base-station-teardown-power-amplifier-part-1-of-2/

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Chinese 2x100W TDA7498 Amplifier – Test and THD+n Measurements

I wanted a small Bluetooth amplifier for my work shop and bought some cheap bare-board versions from Ebay. This TDA7498 design is over-advertised, but not as bad as other cheap bluetooth amplifiers from ebay. Test, frequency response and THD+n measurements …

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Chinese 2x50W Bluetooth Amplifier, Or Is It? A Poor Abused TDA7492P Design

I wanted a small Bluetooth amplifier for my work shop and bought some cheap TDA7492P bare-board versions from Ebay. Luckily there is other good Bluetooth amplifiers! This poor TDA7492P design is over-advertised and abused enough that I requested my money …

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Nokia Siemens Flexi 3x90W FXEB 1800MHz Base Station Teardown: Power Amplifier (Part 2 of 2)

This Nokia Siemens Networks Multiradio BTS FXEB module is a GSM 1800 MHz 90W amplifier module capable of GSM/EDGE, WCDMA/HSPA and LTE. If you missed part 1, see it here: Nokia Siemens Flexi 3x90W FXEB 1800MHz base station teardown: Power …

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Nokia Siemens Flexi 3x90W FXEB 1800MHz Base Station Teardown: Power Amplifier (Part 1 of 2)

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. 3×90 Watt output power. All high resolution pictures will be published with …

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