Message-ID: <005e01bfb41d$2b4bc360$0600a8c0@MARC>
From: "mv tsi" <mv.tsi@laposte.net>
To: rsgb_lf_group@blacksheep.org
References: <2000050208250568199@zetnet.co.uk>
Subject: LF: Re: Re: Telsa Coils
Date: Tue, 2 May 2000 11:59:53 +0200
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Yes it's very interesting.
I saw in a tesla site that some people used  4 X 811 valve to amplifer a 130
Khz signal for Tesla coil !
It's a good spark transmitter!
Best 73 marc F5MAF
f5maf@qsl.net
www.qsl.net/f5maf

----- Original Message -----
From: Peter Dodd <g3ldo@zetnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, May 02, 2000 9:25 AM
Subject: LF: Re: Telsa Coils


> Yesterday, Monday, I operated from GB2CPM, not on LF but at the HF
> permanent amateur station that forms part of the radio section of the
museum.
> At the Electricity Hall a group of Telso Coil builders had converged
> for a Telsa coil session. This comprised two groups, an indoor
> exibition using small coils ranging from 10cm long to 1m long; and
> the second group with the big coils (up to 2m long) which had to be
> done outside because of the very high voltages they produced.
> The indoor goup had the advantage having a large room that could be
> darkened allowing the spectacular display to bee seen to its best
> advantage. The room had to be ventilated between sessions to clear
> out all the ozone!
> The outdoor group set up a test area in the afternoon, starting by
> digging a cruciform shaped trench and laying down a lot of copper
> tubing and soaking it in brine before filling it in. The components
> of three large coils arrived in special vans and I was able to watch
> and photograph these coils and the electrical control and power
> systems being assembled.
>
> The length of the main coils of the larger Telsa machines ranged from
> 1 to 2m with a length/diameter ratio of around 3:1. The inductance of
> the main coils ranged from 400mH to 1.2H depending on the size of the
> machine. All coils seemed to be close wound with 1mm enamelled copper
> wire. The primary coils were made of 10mm copper tubing with clip
> connections for 'tuning'.
>
> This main set of experiments had to be done after the museum had
> closed to the public and when it was getting dark. The corona
> discharge from 1meV machine was truely spectacular and  made our hair
> stand on end!
>
> I was much taken with the technology of these machines, particularly
> the care with which the coils had been wound and the construction of
> high capacity high voltage capacitors. Some members of the group were
> interested in our activities in a similar technology.
>
> If you want to know more about the Telsa Builders activities see
> <www.tcbouk.org.uk>
>
> --
> Regards, Peter, G3LDO
>
> <g3ldo@zetnet.co.uk>
>
>
>