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RE: Srike rail/tank circuit shield grounding
Original poster: "Mudford, Chris by way of Terry Fritz <teslalist-at-qwest-dot-net>" <chris.mudford-at-agresearch.co.nz>
When I talked a tank circuit shield I was meaning if the capacitor and
spark gap were sitting out to one side of the primary coil I was
envisaging having a flat sheet of chicken wire or equivalent sitting
over the top to stop any arc to that gear.
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, 26 January 2003 5:16 p.m.
Subject: RE: Srike rail/tank circuit shield grounding
Original poster: "Lau, Gary by way of Terry Fritz <teslalist-at-qwest-dot-net>"
The first question about the counterpoise and strike rail is tricky, I'm
not sure. Strikes really should go to a good ground. Tank circuit
shield? I've not heard of this.
On your question about the distance between the primary coil and the
circuit - the tank circuit is comprised of the capacitor and primary
(and spark gap). So I'll assume you're just asking about how long the
interconnections between these 3 components can be. On my 4kv/20mA
mini coil, I originally lashed it together with maybe 2-3 feet of
wire. When I tidied it up, reducing the interconnections to under 1
performance increased an inch or two. Definitely worth doing.
I doubt that a fan motor would be affected by being close to the primary
coil, unless it's a DC motor that uses Hall-effect sensors and other low
voltage electronics. 3-4 inches should be fine for an AC motor near a
small primary, preferably off to one side.
Regards, Gary Lau
>Original poster: "Mudford, Chris by way of Terry Fritz
>It is my understanding that the strike rail and shield for the tank
>circuit are to be connected to RF ground. If this is indeed the case,
>if using a counterpoise are the before mentioned still connected to the
>counterpoise? > >Also, although wanting to keep the distance from the
tank circuit to the >primary coil short, how long can this
realistically be on a small 6 kV >30 mA coil. On the same coil if one
decided to mount the tank circuit >beneith the primary coil what sort
of clearance is required and would a >fan motor on the spark gap be
affected? > >Thanks for your help. > >Chris.