RE: Liquid-cooled spark gap

• To: tesla-at-pupman-dot-com
• Subject: RE: Liquid-cooled spark gap
• From: "Payne, Will E" <will.e.payne-at-lmco-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Fri, 25 Sep 1998 17:26:07 -0600
• Approved: terryf-at-verinet-dot-com

Use CLEAN water.  Some leakage current can be tolerated.

I made a 1296 MHz amplifier at 1.5 kW by converting an air cooled 2C39 tube
to a water cooled anode at + 2.8 kV DC.  It uses a small water pump and an
auto transmission cooler to provide a cooling loop which is plumbed with
tygon plastic tubing.  About 1 m from the high voltage, the water runs thru
some copper fittings which were safety grounded thru a milliammeter.  When
the leakage current rises to a few mA, its time to change the water,
typically every few weeks.

Will

> ----------
> From: 	Tesla List[SMTP:tesla-at-pupman-dot-com]
> Sent: 	Thursday, September 24, 1998 21:13
> To: 	tesla-at-pupman-dot-com
> Subject: 	Liquid-cooled spark gap
> 
> Original Poster: Stefan Bishay <stefan00-at-gte-dot-net> 
> 
> Hello All, I am faced with an interesting dilemma. A liquid of some sort
> will be used to cool my new spark gap, but what should I use? I would like
> to be able to use a standard water pump for this, so I was thinking of
> using isopropyl alcohol as the coolant. Any better ideas?
> 
> 
> Stefan Bishay - KC7SJC				            
> Seattle, WA	                   
> ICQ 2141646
> 
> 

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