Tag HP-23
I have been interested in doing a rebuild of a Heathkit HP-23 power supply for a little while. For those looking for older gear I have noticed that the HP-23 series power supplies seem to be more rare than the… Continue Reading →
WARNING – The power supply operates at lethal voltages that can kill you. Even after power has been turned off many of the capacitors may maintain a dangerously high voltage over a period of time. Use extreme caution when using the… Continue Reading →
The replacement circuit breaker requires for the chassis mounting hole to be drilled and opened up to a 3/8in hole. When doing this step be sure to protect the wires inside the chassis. To drill a new hole for the… Continue Reading →
For my original HP-23A refurbishment project I decided to develop my own custom circuit board. It is common for prototype circuit board orders to have small minimum order, however for most fabrication houses in China, even though they force you… Continue Reading →
The easiest step for something catastrophic to go wrong during the rebuild phase is during wiring. During this phase is it important to verify every step made to ensure 100% accuracy. Depending on the method and workmanship that the original… Continue Reading →
After wiring is complete I always suggest taking a break and prior to testing doing a through check of all of the wiring to the schematic before powering everything up. I like to go through things wire by wire and… Continue Reading →