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8d83 rectifer replacement




 
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Author Topic: 8d83 rectifer replacement  (Read 432 times)
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k6hsg
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« on: December 26, 2017, 01:56:43 PM »

Found two of these in my junk room as Mary would say.
Anyone know what peak AC voltage they would handle?
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John,  K6HSG  Tucson, Arizona
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Patrick J. / KD5OEI
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« Reply #1 on: January 01, 2018, 08:36:25 AM »

Could you post an image of the tube from as many interesting angles as appropriate to show structure, and especially a high detail image of the type number, and indicate the manufacturer if known?

I have the JEDEC files, perhaps the information is in there or partial.
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Radio Candelstein - Flagship Station of the NRK Radio Network.
k6hsg
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« Reply #2 on: January 01, 2018, 01:18:15 PM »

What I have is the diode replacement for a 4 pin rectifier.
It is a 4 pin tube base with the diodes covered with white epoxy.
It is labeled with a piece of tape with 8d83 hand written on it.  The base is labeled Sylvania under the tape.
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John,  K6HSG  Tucson, Arizona
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« Reply #3 on: January 01, 2018, 05:43:48 PM »

The tape with writing on it may not mean much.
That type does not show up anywhere but it has 83 in the number, maybe equivalent to that type. 4 pin it could be anything up to a 5Z3 size, same rating as 5U4. also could be smaller like the 5X4, 400V RMS per plate @ 100mA or 1275V RMS per plate@30mA. Might also be something someone made.

Perhaps the best way to find out would be to use or rig up a diode tester to give breakdown voltage and then give yourself some room.
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Radio Candelstein - Flagship Station of the NRK Radio Network.
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