RE: [TCML] Re Electrode diameter

[<toxandale@xxxxxxxxxxxxx>]

I run 3-4 KVA on 1/8" spinning electrodes on this sized diameter with no
deterioration of the flying contacts. The stationary contacts are another
question though as I was required to go to at least 5/16" to keep from
constantly adjusting for lost contact material.

Terry

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Barton B. Anderson
Sent: Sunday, December 02, 2007 11:51 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Re Electrode diameter

Hi Phillip,

If you have the 1/2" tungsten, I would recommend using them, especially 
on the stationary side. Everything heats up with enough power and the 
larger electrodes will handle the power better. I use 3/8" tungsten, but 
if I had 1/2" I would certainly use them.

Take care,
Bart

Phillip Strauss wrote:
> Hi All,
> I'm building a 12" diam. secondary SRSG coil running at 10Kv, 7KVa, 
> 50Hz and 100bps. Motor speed is 3000rpm, rotor 12" diam G10, two 
> flying electrodes at 11" diameter and tank capacitance 0.15uF.,
> I have a selection of Tungsten electrodes, both 1/4" and 1/2" diam and 
> have a choice of either two or four fixed gaps in heavy brass. Is 1/4" 
> diam adequate to contain the heat
> or is 1/2" better perhaps to aid regular firing albeit increasing the 
> dwell. Should the electrode gaps be minimal ( without risk of contact 
> of course) or is there  an optimum distance,
> again to slightly reduce the dwell time. I appreciate that the 
> relatively low input voltage limits experimentation in this last regard,
> Any help greatly appreciated,
> Regards,
> Phillip.
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