Monday, January 7, 2008

Power-on delay PCB

I made a new power-on delay relay circuit (soft-start) PCB yesterday. The zener diode which create a high turn on voltage for the Darlington connected transistor pair. The delay is approx. 3 seconds using 47K resistor and 100 uF capacitor. Longer delays can be obtained with a large capacitor.

Saturday, January 5, 2008

GI7B Six Meter Amplifier Project - Update 9

It is connected to a BIRD Dummy Load (Model 8401) and 43 Watt Meter and easy tune to approx. 700W output. End of the project. Look forward to hear you on the magic band.