Re: Simple questions (fwd)
---------- Forwarded message ----------
Date: Wed, 20 May 1998 11:06:44 EDT
From: Esondrmn <Esondrmn-at-aol-dot-com>
Subject: Re: Simple questions (fwd)
In a message dated 98-05-19 03:36:15 EDT, you write:
The RQ(Richard Quick) gap is simply a number (6 - 10) of short lengths
copper tubing attached to the inside of a piece of pvc pipe with about .025
inch spacing between each. The pvc pipe is slotted at the places where the
spaces between the copper pipes are mounted for airflow to cool and quench
arcs. One end of the pvc pipe is sealed off and a muffin fan or vacuum
cleaner is attached to the open end to draw the air past the copper pipes
through the slots in the pipe. The main advantage of this type of gap is
that the arc is broken up into many smaller arcs that quench more easily than
a single bolt type gap. The actual number of pipes needed depends on your
system and will have to be determined empirically.
As for the salt water caps, these are just beer bottles or something
similar with salt water inside and a wire dipping into the water to conduct
current. The bottles are connected in parallel and all placed into a metal
tub of salt water The tub is the other connection for the cap bank. You
will probably have the same problem with them as the plate cap you built
glass as the dielectric. I would suggest building a rolled or plate cap
polyethylene as the dielectric.
Hope this helps.
I have two of the RQ style spark gaps. Neither end of the pvc pipe is sealed.
The bottom is left open and has legs glued on to space it maybe 1.0 to 2.0" up
off the table. The top is fitted with a 6.0" pvc end cap with a large hole
cut out of the center to mount the fan. I have the fan blowing down through
the gap. I think the end cap also helps the pvc pipe keep its shape when
things get hot and thus preserves the original gap settings.