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pnh0001 · 10th May 2019, 9:55 am

Hi Andy

I had the same problem with mine, one half of the secondary was o/c Initially I replaced with a 3:1 interstage transformer from Antique Electronic Supply. That worked fine.

I also rewound the entire transformer primary & secondary as I destroyed the primary some how in getting the secondary windings off. Rewinding was a real pain, I made up a winder in meccano that automatically went backwards and forwards to lay out the windings. Took hours, but again the end result worked fine and is indistinguishable now from original.

You can see my winder here:

https://www.youtube.com/watch?v=KWIVDToPSIE

At that point it was doing one half of the secondary winding, (the primary had been done) the bits of white are dowels holding the space of the second half of the secondary.

regards

Peter

10th May 2019, 9:55 am	#2
pnh0001 Triode Join Date: Nov 2007 Location: Brisbane, Australia Posts: 32	Re: 1134A intercom amplifier Hi Andy I had the same problem with mine, one half of the secondary was o/c Initially I replaced with a 3:1 interstage transformer from Antique Electronic Supply. That worked fine. I also rewound the entire transformer primary & secondary as I destroyed the primary some how in getting the secondary windings off. Rewinding was a real pain, I made up a winder in meccano that automatically went backwards and forwards to lay out the windings. Took hours, but again the end result worked fine and is indistinguishable now from original. You can see my winder here: https://www.youtube.com/watch?v=KWIVDToPSIE At that point it was doing one half of the secondary winding, (the primary had been done) the bits of white are dowels holding the space of the second half of the secondary. regards Peter