Power supply fusing can be tricky. It has been my practice to use ptc
devices embedded into a transformer primary as the fuse, they're sometimes
called everlasting fuses. They detect temperature in their immediate
environment (eg transformer winding) and due to self-heating. They trip at
a
Just a comment and a question.
I take care of our club's repeaters. One of the power supplies failed this
weekend. I watched as smoke came out of it. It is 20+ years old. Here is
the comment; make sure the fuse on the primary is properly matched, even if
you choose to go lighter. (It's not
“...It seems to me that a versatile fused crowbar circuit would be good.Has
anybody been there and done that? Maybe someone sells one”
See the Voltage Protector article in the “Articles” section of my website at
www.ad5x.com.
Phil – AD5X
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