Over-Voltage Crowbar Protection for Ham TransceiversDesigned by 9H1LO in Malta
Most linear power supplies do not include a crowbar as over-voltage protection. Should the output pass transistors fail you risk your radio getting over 24V directly from the power supplies rectifi...Read More…
Most linear power supplies do not include a crowbar as over-voltage protection. Should the output pass transistors fail you risk your radio getting over 24V directly from the power supplies rectifier.
This circuit uses a 40TPS12 from Vishay which when triggered by the Zener diode will clamp the power supply to ground and blow the fuse, protecting your expensive radio from over-voltage.
This is available as a kit and supplied with the fuse size of your choice. As standard this will clamp at around 14.8v, other voltages can be made available on request.
Supplied with a 25 Amp fuse as standard.
NO COMPROMISE ON PARTS QUALITY as this has to WORK 100% to save your radio, therefore all components supplied from Farnell not cheap stuff from the far-east.
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