RE: Early versions of Tesla's coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture by way of Terry Fritz <teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Jolyon -

The static gap operates only when the voltage across the gap is high enough
to initiate a spark. The wider the gap the higher the required voltage. The
operation can be in microseconds.  The buzzer contact is a mechanical action
and will open or close only when the coil has enough electrical energy to
operate the contact. The open or close action does not depend on the voltage
across the contacts. The maximum a relay contact of this type can operate is
about 1000 cycles per second.

John Couture

-----------------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, July 07, 2003 10:35 AM
To: tesla-at-pupman-dot-com
Subject: Re: Early versions of Tesla's coil


Original poster: "Jolyon Vater Cox by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, July 06, 2003 11:54 PM
Subject: Re: Early versions of Tesla's coil


  > Original poster: "RMC by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<RMC-at-richardcraven.plus-dot-com>
  >

   The spark gap is a large relay contact
  > arrangement - two facing W pads and a cam-shaped bakelite lever that
presses
  > a phosphor-bronze element holding one of the faces towards the other.
  >
  > The primary cap is a couple of nF and the mains transformer is a
  > single-ended 2 or 3 kV output at a few mA.  It is a very small coil but
is
  > very nice to see working.
  >
I am intigued  by mention of the W-pad relay contacts plus high voltage
transformer in the vacuum leak testers - only, with the 2-3kV transformer I
would have presumed that a straightforward spark-gap (albeit a narrow one!)
would  be all that was be needed, yet relay contacts and a lever are also
described.
Do they function as an electro-mechanical switch like a relay or buzzer
contact
or are they part of a normal static spark gap with the lever simply being
used to adjust the gap setting?

Jolyon

  > Cheers
  >
  > RMC, England
  >
  >
  >