Re: High Voltage Diode Questions (fwd)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Tesla List Moderator <mod1-at-poodle.pupman-dot-com>



---------- Forwarded message ----------
Date: Sat, 17 Jul 2004 05:13:52 -0700 (PDT)
From: Yurtle Turtle <yurtle_t-at-yahoo-dot-com>
To: Tesla list <tesla-at-pupman-dot-com>
Subject: Re: High Voltage Diode Questions

The eBay photos aren't there any more. I got four of
these puppies for $82.20. They're rated at 125 kV 1
amp. I was concerned that they might not "work" at
only 15 kV, but they worked just fine.

http://www.hot-streamer-dot-com/adam/garage/diodes_125_kV_1_amp_1.jpg

http://www.hot-streamer-dot-com/adam/garage/diodes_125_kV_1_amp_2.jpg

I have sucessfully used them for charging my big caps
for shrinking quarters after I blew up my 34 kVDC PSU.
At "low voltages" like 15 kV, they didn't need to be
submerged under oil.

Adam

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "David Rieben"
> <drieben-at-midsouth.rr-dot-com> 
> 
> Hi all,
> 
> I just received some high voltage diodes that I won
> off of ebay today. They 
> can be seen at: 
>
<http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3825303927&ssPageName=STRK:MEWA:IT>http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3825303927&ssPageName=STRK:MEWA:IT
> First of all, I believe that they come out of an
> x-ray power supply. Notice 
> that they are of the heavy duty stackable "hockey
> puck" style instead of 
> the little seriesed diodes
> "sticks". I went ahead and asked him if he would
> sell me 3 of his other 
> diodes like this for making a full-wave bridge
> rectifier capable of 150 kV 
> at 1.5 amps for the same price each as the first
> one. He agreed so I now 
> have 4 of these 150 kV diode stacks for a little
> over $100, including 
> shipping ;^) Not too bad..
> 
> Anyway, I'm assuming that there'd be no problem to
> use them as a rectifier 
> for a large DC powered coil system as the primary
> circuit voltage would be 
> <25 kV with a 14.4 kV pig as the HV transformer. I
> realize that I'd have to 
> have large filtering caps and inductive chokes with
> them, but I'm thinking 
> that these would work great in this type of setup.
> 
> I'm also assuming that they must be operated under
> oil to operate at 
> anything near their voltage rating since 150 kV
> would easily "creep" around 
> the surface of these units in open air? I'm sure
> they were submerged inside 
> of the x-ray tranny tank under the oil.
> 
> Thanks,
> David Rieben
> 
> 
> 
> 



		
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