Tube Preamp $25 vs $4,000 Comparison

Fever 6j1 Preamp Measurements and Mods. How to measure a Preamp using the Audio Analyzer Suite.

Making Some DIY Concrete Paving Stones

Convert Tricycle to Electric Power for $200 - including the Battery Pack.

Possible to Wake a Cat With the Smell of Tuna?

Conversion of New Rally-X for the Commodore 64

Retro Programming on the C64 Episode 4 - Raster Interrupts and How to Play SID Music in Code.

Super Console X Pro - Plug and Play Retro Game Emulation Console

Audio-Technical AT3600L Review Follow Up

Comparison and detailed measurements of Audio-Technica AT3600L and AT95E phono cartridges.

Retro Programming on the Commodore 64 - Episode 3 - Sprites and Graphics

CNC Milling Aluminum Brackets for Turntable using Cambam and Candle.

Follow up on 500W Spindle Review - Vibrations, Cooling.

Review of Cheap 500W Air Cooled CNC Spindle with Power Supply and Speed Regulation

Nagaoka MP-110 Simple Mod to Improve the Frequency Response

Comparison and detailed measurements of Audio-Technica AT95E and Nagaoka MP-110 phono cartridges.

Designing and Building a Tube Headphone Amplifier - Part 2 - Power Supply Design

Microsoft Wireless Mouse 1850 Disassembly and Clean

Fixing a Broken Samsung Microwave Oven.

Vintage Sony PS 3700 Turntable Repair and Restoration - Part 2

Vintage Sony PS 3700 Turntable Repair and Restoration - Part 1

Repair of a Sony CD Player Model CDP-611 / CDP-D7 - No Disc Error

Audio Analyzer Suite v 1.2.0.3 available for download

Samsung S8 Dangerous Battery Failure (Double) and Replace

Sony Compact Cassette Deck (TC-KA3ES) Calibration and Frequency Response Test.

Android Tablet Battery Replacement

Repair of an IBM ThinkPad Switchmode Laptop Power Adapter.

Designing and Building a Tube Headphone Amplifier - Part 1 - Prototype Design and Measurements

Making Tube Prototype Sockets

Retro Programming on the Commodore 64 - Episode 2 - Assembly Programming

Impedance Analyzer v1.4.0.0 Available for Download

Retro Programming on the Commodore 64 - Episode 1 - Getting Started

Samsung NX 1000 Camera Program Selector Fix

Designing and building a VU Meter driver.

CNC Milling Double Sided PCBs Using Eagle, FlatCam and GRBL/Candle, Step by Step Detailed Guide

Fixing the LongWei LW-K3010D Bench Supply Noise Issue

Fix Schiit Mani Phono Preamp Ultra Bright Power LED Issue

Bench Power Supply Testing, Homemade vs. Korad KA3005 vs. LongWei LW-K3010D

Build a Small Dual Rail Linear Bench Power Supply.

Asus Xonar U7 MK2 Performance Improvements.

PLA 3D Prints Deteriorating After Just 4-6 Years

N-Audio PP400 Phono Preamp Modifications [Re-Upload]

High Voltage (200-450V) DC-DC PSU Module $10 Ebay Review

High Voltage (150-420V) DC-DC PSU Module $15 Ebay Review

Yamaha GT-750 Turntable Repair, Service and Clean

Bench Power Supply 30V/10A Review - LongWei LW-K3010D

Impedance Analyzer v1.3.0.43 available for Download

CNC Milling PCB using Eagle, Flatcam and GRBL

N-Audio PP400 Phono Preamp Modifications

Audio Analyzer Suite - New Version Available - 1.0.0.76

Analog Discovery Repair ... Again...

Samsung DVD Player/Recorder Repair DVD-HR730

Audio Analyzer Suite 1.0.0.75 Available for Download

Sony TC-KA3ES Cassette Deck Repair (TCM-200 Mechanism)

Analog Discovery Repair

Analog Discovery Impedance Analyzer Bias Voltage

KT88/EL34 Push Pull Tube Amplifier Measurements Part 2

KT88/EL34 Push Pull Tube Amplifier on The Bench Part 1

USB Solder Iron eBay Review

Yaqin VK-2100 Amplifier Part 2