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Rotaries and Neons (fwd)
---------- Forwarded message ----------
Date: Wed, 5 Aug 98 08:44:14 EDT
From: Gary Lau 05-Aug-1998 0817 <lau-at-hdecad.ENET.dec-dot-com>
To: tesla-at-pupman-dot-com
Subject: Rotaries and Neons (fwd)
>From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
>To: tesla-at-pupman-dot-com
>Subject: Rotaries and Neons
>
>Terry, Gary Lau and all,
> I'm seeking an opinion here: if one uses a
>good RC filter with a NST, is there any remaining hurdle to using an
>async rotary gap?
>
>Malcolm
As I understand it, the reason that async rotary gaps are not recommended
for use with neons is not related to filterable high frequency transients.
The same kinds of high voltage, high frequency resonances should occur
regardless of sync or async, or static or rotary gaps.
The problem with async RSG's and NST's has due to the fact that mains
resonance between the NST and primary cap will exceed the NST's breakdown
voltage if and when a mains voltage peak does not coincide with a gap
presentation. Using a sync RSG guarantees this cannot happen. Pole pigs
are more robust and can survive a mains ring-up.
One should also observe that an async RSG will expose the cap to the same
high voltage mains ring-up, so the cap in an async RSG rig should also be
rated higher.
Regards,
Gary Lau
Waltham, MA USA