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Re: New Testing
From: DR.RESONANCE[SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Sunday, September 14, 1997 3:53 PM
To: Tesla List
Subject: Re: New Testing
To: George
We have used it with pole transformers and it develops resonant rise to
around 150 kV with the TC cap being a .05 MFD unit. The resonant rise in
one case actually sent streamers of sparks over the pole xmfr bushing which
is rated 125 kV BIL. Caution is advised here -- we don't use this method
at all on our systems.
DR.RESONANCE-at-next-wave-dot-net
>
> From: George W. Ensley[SMTP:erc-at-coastalnet-dot-com]
> Sent: Sunday, September 14, 1997 12:59 AM
> To: Tesla List
> Subject: Re: New Testing
>
> Dr. Resonance,
>
> It is common practice in the electronics industry to use
> shielded xmission line to carry data etc. from potentially
> noisy devices. The shield is generally case/rf ground at
> the offender (TC) and left open at the end attached to the
> susceptible device (xfmr). I would presume that the added
> capacity of the shield would act as additional rf bypass
> to ground and help clean up any hash on the data/HV lines.
>
> Is there a flaw here? I wouldn't expect to see any
> significant effects due to resonance at lengths in
> 50ft range.
>
> George.......
>
>
>
>
> At 03:12 PM 9/13/97 -0500, you wrote:
> >
> >From: DR.RESONANCE[SMTP:DR.RESONANCE-at-next-wave-dot-net]
> >Sent: Saturday, September 13, 1997 10:28 AM
> >To: Tesla List
> >Subject: Re: New Testing
> >
> >To: Ed
> >
> >I presume you are not using the coax with the shield grounded. NEVER
EVER
> >use a coax cable to feed a TC from a pole xmfr. The xmfr will take the
> >extra 50 kv this blum line effect can generate but the caps will quickly
> >fail. We learned this lesson the hard way. I presume you are using the
> >coax with the shield shorted to the center and only as a conductor not a
> >transmission line. This is OK, but beware using coax as a transmission
> >line. Better to use what I call "big red" which is essentially 15 kv
> >"jumper cable" with a BIL of 100 kv. We stock it if you need it.
> >
> >DR.RESONANCE-at-next-wave-dot-net
> >
>
>