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Fisher 400 Rectifier

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pilotmatt94

New Member
I have a Fisher 400 that I have been working on for a while with chassis serial number 198076. This 400 still has the selenium rectifier bridge in it, which I know needs to be changed for a modern silicon rectifier, but I was wondering if anyone had a cross-reference for a new silicon bridge rectifier, as I can't find one anywhere.
Thanks in advance for your help
 
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Your basic four pin rectifier bridge from Radio Shack will work.
I don't recall there being any magic part number and I'm not sure if they sell more than one type.
Mark where each wire goes before taking the old one off. It's got two DC wires and two AC wires. You want to be sure to attach them to the right spot on the new diode bridge rectifier.
 
They do sell more than one type. The only thing that I am worried about is getting the correct voltage and amperage values for the rectifier, which I do not know. There is nothing stamped on the Siemens rectifier, nor is there anything in the service manual about the power values that the rectifier requires.
 
The most common one used from Radio shack is

FULL WAVE BRIDGE RECTIFIER. 400V
8AMP. Radio Shack part # 276-1181.

Voltage is fine for this and there is a surplus on the amperage side. A 400V 4A is right at the limit.

Larry
 
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