Ground on PT Primary?

Deric · Post by **Deric** » Mon 04/30/07 5:23 pm

I found a new in box PT at an electronics repair shop that is shutting it's doors. The primary has 2 black wires and an Orange ground wire. I haven't run accross a ground on the primary before. Is this common? Should I "ground" it or.....?

Thanks

what_wires · Post by **what_wires** » Mon 04/30/07 5:49 pm

Measure the resistance between the orange wire and the frame of the transformer. If it isn't connected to the frame, I would just tape it off.

Post by **zaphod_phil** » Mon 04/30/07 9:51 pm

Yes, some high quality PTs have a Faraday shield like that.

Deric · Post by **Deric** » Tue 05/01/07 12:41 am

I Googled the number on the bottom of the PT and found this...

http://www.tubesandmore.com/scripts/fox ... =P-TF22723

bigsbybender · Post by **bigsbybender** » Tue 05/01/07 1:50 am

That would be the tap for the Faraday shield....I've found that a lot of replacement PT's have them....you can ground it with the secondary Center Tap...or any other convenient place.

j.

Deric · Post by **Deric** » Tue 05/01/07 10:27 am

Thanks for the help guys!!!

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Ground on PT Primary?

Ground on PT Primary?