Here is a large dim bulb tester and variable AC power supply that will provide up to 240 Volts. It current limits at “Around” 1 amp at 120V, and 500mA at 240V with the bulbs switched in. This is a dangerous build. If you build this, it’s at your own Continue reading Big Dim Bulb Tester with Variac and Isolation Transformer
This radio has “Hybrid Modules” throughout, see how to reverse engineer these hybrids. Also a quick “general description” of the workings, and a run down on the alignment.
Here is an easy way to decode SSB, or single sideband transmissions on your old radio that will only receive AM.
This is a short video explaining some modifications to make your Stromberg Carlson 240-H Chassis a little better. Also explains “Wave Trap” tuning and a Volume Control potentiometer fix for these old radios.
This video shows from beginning to end, the repair of an old radio from the 1938 era. This Stromberg Carlson 240-H chassis was the Cadillac of the time. It’s an 11 tube superheterodyne receiver with push-pull output, an IF section with 3 selectable response curves, and a lot more.
This is a quick review of this little, Smart Multimeter. See if this meter is what your looking for.
This Video explains (step by step) how to determine the DC Current gain, DC beta, or “static forward Current transfer ratio” of two small signal 2N3904 Transistors, using a Curve Tracer.
Quick video on how to identify unknown transistors using a curve tracer. This video focuses on “hfe” AC Beta or AC Current gain, which is a dynamic current gain measurement.
This Video explains how I repaired this Husky Pro compressor. I also modified the cooling system, and gave it a status box with LED indicators. Really handy to see if I have the breaker on or off for the garage.
Here is a Tip many people overlook when servicing circuit boards. You will be surprised how obvious this problem is. The question is, why do the manufacturers keep doing this?