kwong – Kerry D. Wong

Lab Power Supply Build Using Old Power Bricks

Over the years, I have accumulated many used computer power bricks. Although I could just use them by themselves to […]

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

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

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

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

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

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

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

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

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

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

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

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

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

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