Aaron Dahlen

4.67K subscribers

214 videos

Richard Feynman is famously quoted as saying: “Study hard what interests you the most in the most undisciplined, irreverent, and original manner possible.” T...

Latest Videos

This Touch Button Is More Than a Switch Banner S22 Programming and Wiring

Three-Wire Start Stop Control Circuit Relay Latch Wiring Explained

Why Wirewound Potentiometers Overheat Current, Wiper Position, and Power Dissipation

Why an NPN Sensor Won’t Drive a PLC Input PNP vs NPN Explained

12AX7 Vacuum Tube Insertion and Extraction with a Shielded Socket

RC Servo Teardown Inside the Feedback Loop and Motor Drive

Effect of Solenoid Core Position on a 555 Astable Oscillator’s Frequency

Improving 2N3904 Turn-Off Speed Measured Effects of Saturation and Schottky Clamping

Visualize Voltage Doubler Operation using LEDs and Advanced Oscilloscope Techniques

Full-Bridge Rectifier Behavior with Differential Measurements with LED Visualization

Pre-Biased Transistors Save PCB Space, Cut BOM Costs, and Simplify Design

Explore the sound production section of a movie projector

Understanding Field-Coil Power Routing in the Zenith 860 Receiver

Teardown of a 1952 Motorola transceiver’ power supply featuring a dynamotor.

Design Evolution in Early All American Five Radios

Chassis Removal and Tube Handling in a Vintage Philco PT-44

Examining Fixed and Moving Plate Structures in a 1960s Sylvania Tuner

Ceramic Standoff Construction Inside a Tektronix 547 Oscilloscope

CRT Anode Supply and Driver Tubes in the Tektronix 547

Teardown of a 1970s AMF Stopwatch With a Single-Chip Display Driver

How the Eico 628 Tube Tester Works (Teardown + Schematic Overview)

How to Straighten Vacuum Tube Pins Using a Tube Tester (7-Pin & 9-Pin Demo)

How to Test Both Sections of a 6SN7 Tube on a Tube Tester (Dual Triode Demo)

How to Test a 6BG6 Tube on the Eico 628 Tube Tester (Step-by-Step Demo)

Inside the Tektronix 1A1 Plug-In (1967) Teardown + Schematic Walkthrough

How the Tektronix CA Plug-In Implements AC Coupling and Direct Input

How Split Gears Eliminate Backlash (Demo + Real Tuning Capacitor Example)

How Early TRF Designs Minimized Coil Interaction and Oscillation

The Velvet Vernier How This 1920s Reduction Drive Works (National Company)

Examining a 1920s Cogswell Condenser for TRF Radio Stages