Re: Coax Cables for High Voltage Transmission (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 18 Nov 2004 11:19:36 -0700
From: Gomez Addams <gomez@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Coax Cables for High Voltage Transmission (fwd)


On Nov 18, 2004, at 9:47 AM, High Voltage list wrote:

> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Wed, 17 Nov 2004 22:34:46 -0600
> From: Dr. Resonance <resonance@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>
>
> As I recall it's made by Devkon.  I'm in AZ so I can't run out to the 
> shop
> and check.

  It must not be ordinary Devcon 2-ton or Devcon 5 minute, because I've 
never been able to get either one to stick to polyethylene, even if the 
surface is roughened.

> Dr. Resonance
>
> Resonance Research Corporation
> E11870 Shadylane Rd.
> Baraboo   WI   53913
> ----- Original Message -----
> From: "High Voltage list" <hvlist@xxxxxxxxxx>
> To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
> Sent: Wednesday, November 17, 2004 9:55 PM
> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>
>
>> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Wed, 17 Nov 2004 14:14:32 -0500
>> From: Jack Vandam <snotoir7674g@xxxxxxxxxxxxxx>
>> To: High Voltage list <hvlist@xxxxxxxxxx>, hvlist
> <hvlist@xxxxxxxxxxxxxxxxx>
>> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>>
>> Thanks for sharing!  If I might ask, what type of epoxy are you using 
>> to
>> glue the PE tube to the metal?
>>
>> Thanks,
>> Jack
>>
>> ----- Original Message -----
>> From: "High Voltage list" <hvlist@xxxxxxxxxx>
>> To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
>> Sent: Wednesday, November 17, 2004 2:00 PM
>> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>>
>>
>>> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>>>
>>>
>>>
>>> ---------- Forwarded message ----------
>>> Date: Wed, 17 Nov 2004 11:06:01 -0600
>>> From: Dr. Resonance <resonance@xxxxxxxxxx>
>>> To: High Voltage list <hvlist@xxxxxxxxxx>
>>> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>>>
>>>
>>> Polyethylene or polypropylene works better as it has less creepage 
>>> and
>>> leakage current factors than pvc.
>>>
>>> We drill out the entire interior part of a SO-239 chassis connector.
> They
>>> we epoxy a 5 inch long PE tube into the SO-239 connector.  At the 
>>> end of
>> the
>>> tube we epoxy in a small bananna receptacle.
>>>
>>> This allows a nice fit to standard RG-8 cable as a DC HV connector.  
>>> The
>>> shield is soldered to the PL-259 plus while the center part is 
>>> stripped
> of
>>> the braided shield as it extends into the PE tube with a bananna tip
>> solder
>>> to the coax cable tip.
>>>
>>> Dr. Resonance
>>>
>>> Resonance Research Corporation
>>> E11870 Shadylane Rd.
>>> Baraboo   WI   53913
>>>
>>>>
>>>> John, thanks for sharing your info on the hv connectors!  That 
>>>> design
>> may
>>> be
>>>> just what I have been looking for.  I hope you don't mind if I ask 
>>>> you
> a
>>>> couple of questions:
>>>>
>>>> What diameter and lenth of pvc pipe did you use and does it tightly
> fit
>>> the
>>>> polyethylene jacket of the cable?
>>>>
>>>> I see you used sheet pvc for the ends of the insulators.  Could pvc
> end
>>> caps
>>>> have been used instead?
>>>>
>>>> Any other info you want to share would be appreciated.  I have a 
>>>> +/-45
>> KV
>>>> metal housed x-ray transformer sitting here for which I would like 
>>>> to
>>> access
>>>> the high voltage for hobby and other uses.  Right now, it's sealed
>> inside
>>>> the case and I have been thinking of making recessed terminals and
>>>> connectors so I can have high voltage access.  The insulated pve
>> recesses
>>>> would be mounted through holes drilled through the metal chassis.
>>>> Connectors/ insulators similar to yours may in fact do the trick.
> This
>>>> route may be the cheapest method (which is what I seek) and the 
>>>> other
>>>> alternative is to remove the transformer and rehouse it in a new
>>> container.
>>>> Didn't have much with that option until lately when I found some pvc
>>> "boxes"
>>>> that would work, although they are expensive.
>>>>
>>>> Thanks,
>>>> Jack
>>>>
>>>> ----- Original Message -----
>>>> From: "High Voltage list" <hvlist@xxxxxxxxxx>
>>>> To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
>>>> Sent: Tuesday, November 16, 2004 2:20 PM
>>>> Subject: Coax Cables for High Voltage Transmission (fwd)
>>>>
>>>>
>>>>> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>>>>>
>>>>>
>>>>>
>>>>> ---------- Forwarded message ----------
>>>>> Date: Mon, 15 Nov 2004 13:37:39 -0700
>>>>> From: John Doran <johnd@xxxxxxxxxxxxxxx>
>>>>> To: hvlist@xxxxxxxxxx
>>>>> Subject: Coax Cables for High Voltage Transmission
>>>>>
>>>>> Howdy!
>>>>>
>>>>>
>>>>>
>>>>> I use polyethylene-insulated RG-8 cable extensively for 
>>>>> high-voltage
>>>>>
>>>>> use in my laboratory, at potentials up to 20 kV, and I have never
> had
>> a
>>>>>
>>>>> problem with it.
>>>>>
>>>>>
>>>>>
>>>>> Spellman High Voltage uses it for potentials of only up to 8kV in
>> their
>>>>>
>>>>> products,
>>>>>
>>>>>
>>>>>
>>>>> www.spellmanhv.com/tech/appnotes/AN-07.doc
>>>>>
>>>>>
>>>>>
>>>>> but I have a Del Electronics 40kV power supply "brick" that employs
>> RG-8
>>>>>
>>>>> cable for its output connection.
>>>>>
>>>>>
>>>>>
>>>>> I have devised a simple HV connector for use with coaxial cable, 
>>>>> and
>>>>> which
>>>>>
>>>>> may be modified for just about any potential.  I have posted 
>>>>> details
>> on
>>>>> my
>>>>>
>>>>> Web site-take a look at
>>>>>
>>>>>
>>>>>
>>>>>             http://timefracture.org/reg.html
>>>>>
>>>>>
>>>>>
>>>>> for more information and some photographs.  Please stay safe!
>>>>>
>>>>>
>>>>>
>>>>> -John
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>>
>
>