RE: HV Capacitors - PTFE (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 23 Sep 2004 17:19:12 -0500
From: Carl Litton <Carl_Litton@xxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: RE: HV Capacitors - PTFE (fwd)

Hey Dave.  [OFF TOPIC - DO NOT READ Yep, took the pricelist out some
time back due issues with shipping and etc, along with scary social
diseases seen developing (e.g. 'homeland security').  Still do business
with known friends and our local club (MMPG)].

Now that I think about, It might be YOU who had the info out about the
powdered PTFE insulated bucket caps?  No?

Know anything about xray power supplies?  BIG ONES????

Carl Litton
Hilton Hotels Corporation
901-374-5747

-----Original Message-----
From: High Voltage list [mailto:hvlist@xxxxxxxxxx] 
Sent: Thursday, September 23, 2004 5:11 PM
To: hvlist
Subject: Re: HV Capacitors - PTFE (fwd)

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 23 Sep 2004 14:02:19 -0400
From: humanb@xxxxxxxxxxxxxxxxxxx
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: HV Capacitors - PTFE (fwd)

Hi Carl, I din't know you were into High Voltage to! I 
would be concerned about the air in the PTFE powder, even 
when compressed. Most folks use MMC's as Gomez mentioned, 
they should get you a nice RF rated pulse cap into the 20 
KV region. Not sure how far you can go with then due to 
corona issues.

By the way, I din't know you were still in the Pyro retai 
buisiness, as your website hasn't worked for sometime.

Take care,

David Trimmmell

On Thu, 23 Sep 2004 11:32:09 -0600 (MDT)
  "High Voltage list" <hvlist@xxxxxxxxxx> wrote:
> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> ---------- Forwarded message ----------
> Date: Thu, 23 Sep 2004 10:31:34 -0600
>From: Gomez Addams <gomez@xxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: HV Capacitors - PTFE (fwd)
> 
> 
> On Sep 23, 2004, at 9:33 AM, High Voltage list wrote:
> 
>> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Thu, 23 Sep 2004 08:47:28 -0500
>> From: Carl Litton <Carl_Litton@xxxxxxxxxx>
>> To: High Voltage list <hvlist@xxxxxxxxxx>
>> Subject: HV Capacitors - PTFE
>>
>>
>> Our new local HV group is finding the securing or 
>>producing reliable,
>> high capacitance capacitors at low cost for working in 
>>the 10's of kV
>> range a serious challenge.
> [snip]
>> Any ideas would be appreciated.
> 
>  What is your application?  Designs which work well for 
>CW RF do not
> work well for DC filtering, and designs for either of 
>those do not work
> well for pulse-discharge applications.
> 
>  Most people I know who are building Tesla coils have 
>either wound their
> own from PE film and thin aluminum roof flashing (then 
>immerse in oil 
> and
> pull a vacuum to eliminate bubbles) or more recently, 
>the multi-mini-cap
> (MMC) designs using strings of 1600 volt, low-loss 
>polypropylene caps.
> 
>