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Kerry D. Wong

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Teardown Pictures of an HT118A Multimeter

November 26, 2020November 26, 2020 kwong

I did a review and teardown of an HT118A multimeter. It is a rather generic 6000 counts true RMS auto-ranging […]

Product Reviews HT118A, Multimeter

Powering Up an HP YIG Tuned Oscillator

October 16, 2020October 16, 2020 kwong

I was going through some of the components I accumulated over the years and stumbled upon a Hewlett Packard YIG […]

Electronics 5086-7023, Array 3711A, HP, HP 6181C, HP 8566B, HP 8660C, Wavetek 907, YIG, YIG Sphere, YIG Tuned OScillator

Teardown of a Cel-Fi Go X Cell Signal Booster

July 5, 2020July 7, 2021 kwong

In the area where I live, the cell phone reception is spotty at the best. Even though I am only […]

Product Reviews, Teardowns ASIC, Cel-Fi, Downlink, Echo Cancellation, ETSI, FCC, Go X, IP66, Jitter, LNA, LPDA, Matched Filter, Multi-Path Fading, NEMA 4, Nextivity, PCI, Repeater, RSRP, RSRQ, RSSI, Signal Booster, SINR, Teardown, Uplink, Yagi

Non-destructive Testing of Fuses

April 12, 2020April 12, 2020 kwong

A fuse is a sacrificial device for the protection the rest of the circuit in an over-current situation. There are […]

Electronics Array 3711A, BK Precision 2709B, Constant Current, Electronic Load, Experiment, Fuse, HRC Fuse, Melting Integral, Non-destructive Testing, Polymetric PTC, PPTC, PTC, Resettable Fuse, Temperature Coefficient

Making an OBD-II Solar Trickle Charger

March 6, 2020March 6, 2020 kwong

I have been travelling quite a bit for the last year or so and have not been able to drive […]

Electronics Blocking Diode, OBD II, Schottky Diode, Solar Panel, Trickle Charger

Teardown of an Amrel PPS 35-2 Programmable Power Supply

December 1, 2019October 9, 2023 kwong

A while back, I did a teardown on a dual-channel Amrel PPS-2322 programmable power supply, and was quite impressed by […]

Electronics AD7541, Amrel, Array 3711A, GAL16V8B, M58725P, MPM81C55P-2, PPS 35-2, PPS-2322, Programmable Power Supply

Teardown of a Keithley 230 Programmable Four-Quadrant Voltage Source

October 25, 2019October 1, 2022 kwong

The latest addition to my lab equipment is a Keithley 230 programmable voltage source which can output up to ±100V. […]

Electronics, Teardowns AD544, GPIB, HP-IB, IEEE-488, Keithley 196, Keithley 230, MJ15011, MJ15012, Teardown, TMS9114A, Voltage Source

Teardown of a Microwave I/Q Down Converter

September 29, 2019September 29, 2019 kwong

I recently picked up a downconverter box on eBay. My original plan was to use the enclosure for another project […]

Electronics Branchline Coupler, Downconverter, Frequency Mixer, I/Q Quadrature Mixer, Quadrature Mixer, Wilkinson Power Divider

Teardown and Modification of an Electrophoresis Power Supply

August 17, 2019August 17, 2019 kwong

Electrophoresis power supplies are commonly found in biology and other life sciences laboratories. These power supplies are usually capable of […]

Electronics 2N6344A, 68HC11, AD654, E-C Apparatus Corporation, EC600-90, Electrophoresis, High Voltage, IRFP450, LM566, LT1014DN, MOC3063, MS6264L, Power Supply, TC1426CPA, Thermo Fisher Scientific, Thyristor, TRIAC, VCO, Voltage Controlled Oscillator

Teardown of a Marconi 2305 Modulation Meter

May 26, 2019June 2, 2019 kwong

I picked up a Marconi 2305 modulation meter off eBay the other day. As the name indicated, a modulation meter […]

Teardowns AM, EAROM, ER3400, FM, Harmonic Mixer, M5L8155P, Marconi 2305, Modulation Meter, PM, Step Recovery Diode, upd446C

LogiMetrics A300/S 2 – 4 GHz Traveling Wave Tube Amplifier – Repaired

May 5, 2019May 5, 2019 kwong

In my previous blog posting, I did a teardown of a LogiMetrics A300/S 2 to 4 GHz Traveling Wave Tube […]

Electronics 54121DM, A300/S, CA3097E, HP 493A, HP8566B, HP8642B, L-3 Communications, LogiMetrics, S Band, Traveling Wave Tube Amplifier, Traveling-wave tube, TWT, TWTA

Teardown of a LogiMetrics A300/S Traveling Wave Tube Amplifier

April 28, 2019May 4, 2019 kwong

I just picked up a LogiMetrics A300/S 2 GHz to 4 GHz (S band) traveling wave tube amplifier (TWTA) on […]

Electronics 54121DM, A300/S, CA3097E, HP 493A, L-3 Communications, LogiMetrics, S Band, Traveling Wave Tube Amplifier, Traveling-wave tube, TWT, TWTA

Teardown of a Spex HS1000 Monochromator Controller

March 30, 2019March 30, 2019 kwong

Monochromator is one of those things that has always fascinated me. Over the years, I have done quite a few […]

Electronics 8051, Controller, FPGA, HandScan, HORIBA, HS1000, Jobin Yvon, KeyLink, MAX232, Monochromator, Spectrometer, SPEX, XC2064, Xlinx

Experiments with a Hydrogen Thyratron

March 3, 2019March 3, 2019 kwong

I was doing some experiments which involves switching high voltages (>3 kV) under high current (>30 Amps) load. Although solid […]

Electronics Hydrogen Thyratron, IGBT, SCR, Thyratron, Thyristor, Titanium Hydride

Teardown of a Piezoelectric Vibrating Gyroscope

February 3, 2019February 3, 2019 kwong

Gyroscopes nowadays are based on micro-electro-mechanical systems (MEMS) technology. They are low cost and extremely miniaturized. A device combing both […]

Electronics Accelerometer, Bimorph, Coriolis Force, Coriolis Vibratory Gyroscope, CVG, ENC-03J, Gyroscope, MEMS, Piezoelectric, Teardown

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