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Teardown of a Waveform 600 MHz to 6 GHz Cross-Polarized 4×4 MIMO Panel Antenna

February 18, 2022February 19, 2022 kwong

In this blog post, we will take a look at a Waveform 600 MHz to 6 GHz ultra-wide-band (UWB) cross-polarized […]

Electronics Antenna, Cross Polarization, Diversity Gain, MIMO, Mutual Coupling, Pattern Diversity, Polarization Diversity, Spatial Diversity, Waveform

Teardown Pictures of the OWON HDS2102S Oscilloscope/DMM/AWG, Compared to the HDS272S

February 11, 2022February 13, 2022 kwong

HDS2102S is the latest version in OWON’s HDS200 series 3-in-1 handheld oscilloscope. It combines a digital oscilloscope, a digital multimeter […]

Electronics Arbitrary Waveform Generator, AWG, DAC904E, Digital Multimeter, GD32F303, HAD1511, HDS2102, HDS2102S, HDS272, HDS272S, Oscilloscope, OWON, Owon HDS200, RS8414, Teardown

Teardown of a NanoVNA-F V2 Vector Network Analyzer

January 7, 2022January 15, 2022 kwong

Recently, I got my hands on a NanoVNA-F V2 made by SYSJOINT. It features a large 4.3 inch touch screen […]

Electronics GD32F103, HP8566B, IP5306, MS5351M, NanoVNA, NanoVNA-F V2, S Parameter, Scalar Network Analyzer, Scattering Matrix, Si5351, SNA, Vector Network Analyzer, VNA, XPT2046

How Does a Spot Welder Work? Review, Teardown and Analysis of a BIFRC DH20 Battery Spot Welder

December 10, 2021December 10, 2021 kwong

A while back I built a spot welder with an old microwave oven transformer (MOT). Since then, I have used […]

Electronics 4N04R8, BIFRC, DH20, IP5306, Lipo, Microwave Oven Transformer, MOT, PC357, Spot Welder, STC 15W404AS, Teardown, YXKY

Review/Teardown of a HoldPeak HP-770D 40000 Counts True RMS Multimeter

November 5, 2021November 5, 2021 kwong

HoldPeak’s HP-770D is a 40,000 counts true RMS multimeter. Price and size-wise it is very similar to UNI-T’s new UT61E+ […]

Electronics Digital Multimeter, DMM, HoldPeak, HP-770D, HT7530-1, HY11p14, HY3131, True RMS

Teardown of an OWON HDS272S 3-in-1 Handheld Oscilloscope/DMM/AWG – Compared with Hantek 2D72

September 18, 2021March 26, 2023 kwong

I recently got my hands on an OWON HDS272S, a top-of-the-line 3-in-1 handheld oscilloscope/digital multimeter/arbitrary waveform generator in OWON’s HDS200 […]

Electronics 2D72, AWG, BQ25616J, DAC904E, DMM, GD32F303, Hantek, HDS200, HDS272S, LM385-1.2, MXT2088, Oscilloscope, OWON, RS8412, Teardown, TLV62150, TP2274, UMW 1018

Hantek DSO2D10 Teardown Pictures

August 14, 2021August 14, 2021 kwong

The DSO2000 series is the latest entry-level digital storage oscilloscope from Hantek. The DSO2D10 version I reviewed (see video linked […]

Electronics 74HC4051, 74HC595, Arbitrary Waveform Generator, AWG, DAC902, DK124, DSO, DSO2000, DSO2D10, F1C200s, Hantek, LETEX LT210, LM6702, Oscilloscope

Teardown of an RSRF Cross-Polarized Dual Band Cellular MIMO Panel Antenna

July 17, 2021February 18, 2022 kwong

In this blog post, let’s take a look at a cross-polarized dual band MIMO Panel antenna that is designed for […]

Electronics Antenna, Cross Polarization, Diplexer, Distributed-Element Filter, Diversity Gain, MIMO, Multi-Path Fading, Polarization Diversity, RSRF, Spatial Diversity, Teardown

Cel-Fi Go X Cell Signal Booster Extreme Teardown

July 10, 2021July 11, 2021 kwong

About a year ago, I bought a Cel-Fi Go X signal booster for my house as where I live the […]

Electronics ASIC, AWB7125, AWB7222, AWB7225, B20200G, Bluetooth, CC2640, Cel-Fi, DC-DC Converter, Duplexer, FPGA, Go X, Inverted F Antenna, Nextivity, RT7272A, Teardown, UMCC, W25Q128JV, W947D2HB

Teardown of a Hantek 2D72 3-in-1 Handheld Oscilloscope/DMM/AWG

June 26, 2021September 11, 2021 kwong

Hantek‘s 2D72 (and 2D42) is the latest handheld oscilloscope in the 2000 series that combines an oscilloscope, a multimeter and […]

Electronics 2D42, 2D72, AD9288, Arbitrary Waveform Generator, AWG, CS7721, DAC902, DMM, EL5166, Hantek, LCMXO2-1200HC, Multimeter, Oscilloscope, Owon HDS200, Spectral Purity

Teardown of an LW-3010EC Programmable Power Supply

May 28, 2021May 28, 2021 kwong

I just received a Topshak LW-3010EC programmable power supply. Like many cheap lab power supplies out there, this is yet […]

Electronics 74HC595, DK112, Longwei, LW-3010EC, Programmable Power Supply, SG3525A, STC 15F2K60S2, TNY280GN

Teardown of a UNI-T UT61E+ True RMS Multimeter

April 4, 2021April 5, 2021 kwong

UNI-T‘s UT61E+ is a 22,000 count true RMS multimeter. It was released towards the end of last year and is […]

Electronics CP2110, ES232, Fuse, HC32L130, HY2613B, Metal Oxide Varistor, MOV, NTC, Teardown, UNI-T, UT161E, UT61E, UT61E+

Visualizing a Full Bridge Rectifier

March 20, 2021March 22, 2021 kwong

Full bridge rectifier (full-wave bridge rectifier, diode bridge or sometimes just simply referred to as bridge rectifier) is something that […]

Electronics Bridge Rectifier, Diode Bridge, Full Bridge Rectifier, Full Wave Bridge Rectifier, LED, UTG962, UTG962E, Visualization

Teardown and Testing of a 1500W Pure Sine Inverter

January 30, 2021January 31, 2021 kwong

A while back, I did a teardown of an 800W Reliable Electric Pure Sine inverter. In this blog post, let’s […]

Electronics 85GT33SW, CNSWIPower, FGA180N33, IGBT, Inverter, IRF1404, LiFePO4, Load Testing, Pure Sine, PureSine, STTH6006W, Teardown

Lab Power Supply Build Using Old Power Bricks

January 5, 2021January 5, 2021 kwong

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

Electronics Comparator, LM338, LM393, Power Brick, PSRR, Relay, Switching Power Supply

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