Re: Tektronix high voltage transformer rewind and vertical output for 7104

Dave Daniel

I remember your posts about that, I guess back in 2014. I had just purchased a 7934 that blew fuses and was hoping that the root cause was not the transformer.

It turned out that the PO was using 2 A fuses when the ‘scope needs a 4 A fuse (it’s written right on the rear panel!).

Once I installed the proper fuse it has worked very well.

I haven’t fired it up since moving back to FL. I guess I need to do that.


Sent from a small flat thingy

On Aug 1, 2019, at 14:20, Karin Johnson <karinann@...> wrote:

A few years back I did a successful rewind of the HV transformer in my 7934. It is still working to this day. Now I don't really want go get into the transformer rewind business, but I will share a potential resource that might be able to help. I'll warn you up front, it won't be cheap.
The company I found that might be willing to do a rewind for you is Sun Transformer, A division of STC, Inc. Their phone number is 618-643-2555.
The contact I had was a gentleman by the name of Les Vaughn. The time frame was from April of 2014.
Just a quick note here, there have been several other folks on this list that have successfully rewound the 7934/7834 HV transformer. It is not
easy but can be done if, and only if the bobbin and core are still in good shape.
Good Luck,

Karin Anne Johnson K3UU
Palm Harbor, FL

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