Electrical construction
FET switch with PTT and alarm inputs
A FET switch to work together with the Arduino PWR / SWR meter and controllable by the PTT is published here. The FET is a […]
Modification of the HP DPS-700CB A
These HP power supplies come from the server market and are able to produce a nice 65 amps at 12V. Point is that the 12V […]
Solid State Amplifier Protection Circuit
Presented here is a article published at the 2010 EME conference describing a Solid State Amplifier Protection circuit. It incorporates 4 current protection circuits, overdrive, […]
Simple Rotor schematic for AC motors
After 25 years my dish needed a new control box for the rotators, the old one was rather worn out. I kept the same AC […]
12V to +10 & -5V
In order to run my 10 GHz station from a single 12V supply I needed a positive and a negative power supply. Well everything comes […]
50 MHz Low Pass Filter Cauer
The filter was build in a tin box 160x100x50mm. All inductors are wound on a 20mm dia. Wire thickness is 2mm copper wire. Capacitors are […]