I would check at the input of the power supply for a shorted filter cap. or a shorted rectifier diode.
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On 2025-04-02 9:01 pm, Jeff Acree via groups.io wrote:
Friends,
My beloved HP8920B RF Communications Test Set started blowing the 5A AC fuse today.? It blows as soon as you push the power switch.? I am wondering if there is a common problem I could look for.? Tomorrow I may try to see if it will run on 12VDC. It has a connector and switch for DC operation.? Any advice appreciated.
Thanks!
Jeff
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