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Re: Misc. Neon Stuff
> Sorry to step on toes, Kenny, (especially after the compliments) but I have a
That's ok I'm flat footed to begin with.
>continuing argument on this one and some other install "misconceptions". While
>you are right about splitting the transformers into two, (all transformers
>above 7,500V are center tapped as per NEC regs. req. no higher voltage than
>7,500V above/below ground) are actually 2 smaller transformers "back to back"
>I don't think that it would help the problem that is under discussion. The
>main thing remember is that ground is only a reference. Since the transformer
>winding is tapped at the primary for center ground, the secondary is already
>referenced as far as it's AC swing relative to ground is concerned. I use this
>aspect to eliminate HV interactions between other transformer secondaries.
>What you have to remember is that while one of those two smaller transformers
>are going positive (with respect to time ) the other half is going negative
>(relative to ground ). The only thing that center point grounding the
>secondary would do is reference the "floating point" for which connection
>(tube) is actually at 0V. potential. This is useful when you have long runs of
>GTO since you can put them at ground potential and not have the usual HV
>interaction with ground. It does NOT cause the opposing HV leads coming from
>the transformer to be ANY less voltage with respect to EACH OTHER and hence,
>does NOT really lessen the HV interaction between the two. On a system where
My understanding (or should I say misunderstanding) was that the secondary
when parallel to the non-midpoint grounded, tubes would have the same
potential difference which I interpretted as 15kv for example. Are you
saying that if I stick my finger on the center point of this circuit I won't
feel hardly anything?
>there is no center tap connection to the secondary you simply have a
>"self-balancing" condition where the 0V. potential is allowed to "find it's
>own center". I think that this method is easier on a transformer because it
>would eliminate a potential imbalance (due to slight loading differences)
>between the secondaries IMHO. Again, a lot of what I learn is stolen from
>other technologies and there is an uncanny relationship between the audio
Ah, you answered my question. But then what does the midpoint grounding of
an HV circuit do if anything? Sounds like it would be contrary to the
floating ground's finding it's center.
>balanced and unbalanced scenario and the neon transformer one. Understanding
>of one helps me with the other (both of which are confusing to most ).
>
Thanks for the input on the mysteries of the ether..
Kenny
Kenny Greenberg Neon Artist, Scenic Specialist, Columnist - Internet World
c/o KRYPTON NEON 34-43 Vernon Blvd Long Island City, NY 11106
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