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Re: [TCML] Fried NST

First see if you're lucky. Try taking   off the lid and seeing if the shorted SECONDARY turns are right at the insulators and might be repaired by melting out insulation.  That's assuming these are the old fashioned ones ones like I have. 

Ed


On 11/30/2018 6:48 AM, Daniel Kunkel wrote:

Previously on the TCML, episode "Adventures in SRSG"...

I finally got my SRSG online tonight...
...I think I fried an NST or two...

I had a chance to diagnose last night and found that one of my 15/30
Franceformers did indeed die in the sacred duty of the coil. It is odd
though, I apply 120v and it hums like it is working, it won't draw and arc
anywhere...so I ramped up the power with a variac and at 120v my DVM only
showed 280v on the secondaries (I forgot to check each HV leg to ground
though). I am guessing this indicates some turns on the primary melted and
shorted together. Furthermore, I am assuming there are no quick
fixes...great...now I have a reason to attempt my first depotting...is this
still the most current/best method?
https://www.pupman.com/listarchives/1999/April/msg00182.html


So back to a vacuum quenched gap for now.

Thanks,
~Dan (taken down a few notches on the KVA scale)
Kansas City area
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