[TCML] Subject: Overheated Secondary

[mark olson]

At 05:57 PM 1/3/08 -0800, you wrote:
>Hi Marko,
>
>I suspect a secondary short (and then the overheating occurred). This 
>would be the norm.
>
>Just unwind a few layers (about 100V loss per layer I expect). Also, don't 
>pot until you measure output. The windings have to be put on in the 
>correct winding polarity (which if you didn't mark their direction before 
>you took it apart you may have to do a quick trial and error test to get 
>it right).
>
>Take care,
>Bart
>>I depotted my transformer and began cleaning it up.  It does not look 
>>like the one Bart photographed.  My
>>transformer has two primary coils in parallel and two secondaries in 
>>series.  One secondary overheated.
>>It never went open (until I worked on it) .  The insulation is gone from 
>>the outer layers of the winding.
>>Not sure how deep the damage goes, it is too cold to work on it lately.
>>
>>Thanks,
>>Marko
Thanks Bart,

My photos are here:  http://members.cox.net/kc5gym/

I have a question or two, maybe a million.
There is a picture of the shunt in my hand. I should remove 1/2 of these?

I was not able to preserve the original "angel hair" wire terminations on 
the secondaries.  Are the inner windings
connected to center tap or are they the hv ends?  I suspect the outer ends 
are the outputs.

Thanks
Marko