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Large Transformer Question
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From: Joshua Resnick [SMTP:seraphim-at-WPI.EDU]
Sent: Wednesday, February 11, 1998 9:51 AM
To: Tesla List
Subject: Large Transformer Question
List,
I have two H&R 5Kv xfmrs being used in series for my primary. I
have not turned my coil on yet but they work great (cap testing)
without tapping the connection between the two secondaries to ground.
Some have said they have connected this to ground and others said they
have not. I was wondering what advantage , if any, comes from grounding
this center connection.
Also my capacitor is .1uf poly / foil stack. Being new to cap building
I used only one layer of foil. The cap is built with two continuous
strips interleaved with polyethylene. When I loaded and gapped the
system to test my cap briefly before attempting to pot it I noticed what
I felt to be amperage effects on the foil coming from the top of the
stack. My roommate (college) believes that the melted foil was from
flaming arcs from the simple gap we had setup that had touched the foil.
The whole strip didn't melt, only a portion on the edge. Anyway I
decided to run bussing strips up each side of the stack to help
distribute the current more evenly. Has anybody had experience with
over-current problems with caps?
Last question - I cut some microwave xfrms apart in a band saw and
removed the secondaries. I measured them out around 350 mH, an
acceptable Tesla-Coil choke. Have people used them before? What current
/ voltage limitations do they have?
Thanks in advance,
Josh
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