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Help! I killed my NST!
Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
I was unpotting my franceformer 15 30 hoping to remove the shunts and get
60ma out of it. And in the process, I was hasty and tore the
primary!!! When I inspected the dammage, three windings had been sheared
off, and another few had their insulation scrapped off!!!
Now I have the whole thing dipped in acetone to dissolve the rest of the
asphalt. When Its done soaking and all the tar is gone, how should I
repair the primary? I have *another* older model franceformer 15 30 which
was a heck of alot easier to unpot, but I tore one of the secondaries and
one was internally shorted. The primary is fine on this core, could I
just swap primaries with my other torn primary franceformer?
Also, about deshunting, My transformer has 6 shunts, three on either side
of the primary. How many should I remove? Can I measure the current
output with an analog DC milliamp meter if I use a rectifier in series with
the meter?
Regards - Jim Mitchell