3x MIDI videos from DRSSTC1 demonstration

All MIDI files played can be found in this thread: https://highvoltageforum.net/index.php?topic=118.0

DRSSTC1 information: http://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/ which I will soon update with the rebuilded bridge

Popcorn

Star Wars – Imperial Death March

Dave Brubeck – Take Five


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My Tesla coil DRSSTC1 exploded 12 days before a show, panic!

Can you guess the song that was played?

Silent death during a MIDI playback, once power is turned back on, the bridge short circuits and burns outs.

I quickly changed it to a SKM200GB123 inverter bridge that I had around, built for another experimental project, hence why its a little crude.

It took 3-4 evenings/nights to locate all the faults, replace parts and get it running again.

I am happy.

Schematic and pictures: http://kaizerpowerelectronics.dk/tesl…

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DRSSTC design guide updated with MMC design guide

It only took me a mere 4 years from I first started this article about the MMC until it is now done for public released 🙂

Not that it took me 4 full years to write on it, but it has been a on/off gathering of information and then finally making a write-up on it.

I hope this will help many builders understand MMC design better: http://kaizerpowerelectronics.dk/…/drss…/mmc-tank-capacitor/

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Video gear & workflow: Canon 5D mk3, Rødelink, FPS1000HD and more

A walk-through and demonstration of all my video and audio equipment that I use for youtube videos.

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AC vs DC fuses, high current, explosive destructive testing and theory

Littlefuse 300A 32VDC fuse destructive test

Protistor 200A 690VAC fuse (naked) destructive test:

Protistor 200A 690VAC fuse (housed) destructive test:

High Voltage Fuse Teardown video: https://www.youtube.com/watch?v=XoW5iqfq4tA
Semiconductor Fuse Applications Guide: https://ep-us.mersen.com/fileadmin/catalog/Literature/Brochures/BR-Semiconductor-Fuse-Applications-Guide-Brochure.pdf

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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. RRU3928 has a dual-transmitter and dual-receiver structure, which supports higher output power and carrier capacity.

It can f.ex. do 6x GSM carriers at each 10 Watt and 1x LTE carrier at 2×10 Watt or 4x GSM carrier at each 10 Watt and 2x UMTS carriers at 2×20 Watt.

If you missed part 1, see it here: http://kaizerpowerelectronics.dk/teardown/huawei-rru3928-1800mhz-radio-base-station-teardown-part-1-of-2/

Above pictures shows the coaxial cavity band pass filter which in popular speech is called a duplexer or diplexer. Duplexer band pass filter explained: https://www.youtube.com/watch?v=HNaAQ3a7Duc

The power amplifier consists of a series of low noise amplifiers, general purpose amplifiers and power amplifiers. The first amplifier IC is not able to be identified.

First identifiable IC is a NXP BLF6G22LS-40P 1.8-2.1 GHz 5-15 Watt dual amplifier that feeds the Infineon PTFB182012FC which is a dual power amplifier rated for 2x 10 Watt dissipation at 1.8 GHz.

Anaren Xinger 1P503S, Anaren Xinger II XC1900A-03S and Anaren Xinger III X3C19P1-05S hybrid and direct couplers are used. One output circulator is used for double protection against reflected energy from the duplexer and antenna array.

The system boards 4 ADC/DAC main processors are unknown HI FPGAs that has a generic part number which is not identifiable.

A Altera Arria II GX EP2AGX260 FPGA seems to be the heart of the unit and does all system control and communication with other units of the system. It has 16 transceivers that can run up to 550 MHz. 102600 Adaptive Logic Modules and 244188 Logic Elements available.

The digital to analog signal path starts with one of the HI FPGA ICs that sends a single highspeed bitstream to the Analog Devices TxDAC AD9122. It is a dual 16-bit DAC with a capability of 1230 MSPS.

Analog Devices ADF4902 PLL and Analog Devices ADL5372 1.5-2.5 GHz Quad Modulators seems to be the next part of the path before the output power adjusting TriQuint TQM879005A which is a 1.4-2.7 GHz Variable Gain Amplifier. It can adjust 0.5 dB amplification at a 6-bit scale input.

The analog to digital signal path starts with 6 NEDITEK NDF9117 1747.5 MHz SAW filters (explained here: https://youtu.be/qO127zY3voE?t=963 ) which feed into a Skyworks SKY64341-11 1.7-2.0 GHz RF frontend. This has by other parts a downconversion mixer (explained here: https://youtu.be/qO127zY3voE?t=865 ) which by the use of a local oscillator can bring down the carrier frequency of the signal to something lower that is easier to work with.

The two separate lines now go through the Analog Devices AD8376 dual Variable Gain Amplifiers that has a bandwidth of 700 MHz at -4dB to 20 dB.

The last stage is the Texas Instruments ADS58C20 which is a dual IF multimode receiver capable of working with both GSM / 3G / LTE. If this is the final analog to digital conversion IC or it is one of the HI FPGAs is hard to tell.

Good power supply layout with a lot of transient protection at the input. A single full-bridge of PSMN4R8-100BSE 100V MOSFETs is used for first stage voltage stabilization before the smaller high current planar transformers are driven by D70N1045 MOSFETs.

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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 in the menu right side: http://kaizerpowerelectronics.dk/

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Huawei RRU3928 1800MHz radio base station teardown (part 1 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. RRU3928 has a dual-transmitter and dual-receiver structure, which supports higher output power and carrier capacity.

It can f.ex. do 6x GSM carriers at each 10 Watt and 1x LTE carrier at 2×10 Watt or 4x GSM carrier at each 10 Watt and 2x UMTS carriers at 2×20 Watt.

This is the initial teardown and later on I will release part 2 which is the circuit analysis video.

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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 it here: http://kaizerpowerelectronics.dk/teardown/nokia-siemens-flexi-bts-base-station-teardown-power-amplifier-part-1-of-2/

Above picture shows the coaxial cavity band pass filter which in popular speech is called a duplexer or diplexer. For a explanation on how this works, watch the first part of the video shown here above.

The duplexer control board and front end is managed by a ARM7 TDMI microcontroller with part number TMS470R1A288PGET. It is a 32-bit 24 MHz RISC processor.

Anaren Xinger II XC1900E hybrid couplers are used for phase split before feeding into the low noise amplifiers for signal transfer from duplexer module to power amplifier module.

The last picture could possibly show the DAC used for the transmit chain. It is a TI DAC56721 which is a 14-bit DAC capable of 275 MSPS.

The power amplifier consists of a series of low noise amplifiers, general purpose amplifiers and power amplifiers. The first few amplifier ICs are not able to be identified as their part numbers are not unique.

First identifiable IC is a Freescale M005N 0.8-2.2 GHz 18.5 dB general purpose amplifier that feeds the Freescale SW7IC18100N which is a power amplifier rated for 100 Watt dissipate at 1.8 GHz.

Two output circulators is used for double protection against reflected energy from the duplexer and antenna array.

The system board main processor is a unknown TI FPGA that has a generic Nokia Siemens part number which is not identifiable. It has a Marvell Alaska 88E1111 Gigabit network controller to handle the optical network interfaces.

A Texas Instruments TI DSP IC could be used for the first stage digital to analog conversion, purely guessed on from its location on the PCB. It is the TMS320TCI100 (C64x series) with is running at 720 MHz and is able of running 5760 MIPS.

The analog to digital signal path starts with a ceramic resonator band pass filter (explained here: https://youtu.be/h9-KhfQM3nI?t=729 ) which feed into a Maxim MAX19995 dual 1.7-2.2 GHz downconversion mixer (explained here: https://youtu.be/qO127zY3voE?t=865 ) which by the use of a local oscillator can bring down the carrier frequency of the signal to something lower that is easier to work with.

The two separate lines now go through the ultra low loss 21 MHz band pass filters from Epcos. The B5221 is a 172.8 MHz SAW IF filter (explained here: https://youtu.be/qO127zY3voE?t=963 ) before being fed into either a ADC or another mixer, the ST PARIS part is not identifiable.

The last stage is the Analog Devices AD9218 which is a dual 10-bit analog to digital conversion IC capable of 105 MSPS.

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Youtube subscription change, please check!

Since youtube changed their notification setup a long while ago, you might be missing out on notifications about my new videos. Be sure to check if you have the “bell” clicked next to the subscription! Thank you 

Check here: https://www.youtube.com/channel/UCSukTlgTEWiL-sl0UeYeJvQ

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