[Test-Equipment] Dummy load

[jbarnes]

Details for Electrical oils can be found at:

Shell.

http://www.shell-lubricants.com/products/pdf/DialaA&AX.pdf

Diala A and AX are used in transformers. I use this oil in X-ray power supplies. It is also used in X-ray tubes.

Esso.

http://www.imperialoil.ca/Canada-English/Files/Products_Lubes/IOCAENWPOESVoltesso.pdf

This is essentially the same oil.

There are other uses for these oils. They can be used for machining especially EDM. Try a machine shop who does EDM.

The relative permitivity of these oils is 2.6 +/- 0.1 relative to free space.

Hope this helps.


John Barnes


---------- Original Message ----------------------------------
From: "Dennis L. Wade" <dwade at pacbell.net>
Date:  Mon, 07 Feb 2005 07:32:37 -0800

>Comments as below.
>
>Brian Clarke wrote:
>> My comment stands about the dielectric coefficient. Rasputin bought a
>> dummy load for HF and VHF usage. The dielectric coefficient is
>> important at these frequencies.
>
>	My Cantenna works fine up through 2 meters with mineral oil.  Has for a 
>while.  YMMV.
>
>> 
>> I don't recall Heath carrying out dielectric coefficient measurements
>> before your alleged claim that Heath recommended usage of bowel
>> treatment for dummy loads. Certainly none was published and in all
>> their literature
>
>	Then you missed it.  See Page 9 of the manual for HN-31
>
>, I have not seen reference to a chemical lab for
>> testing oils. And while we are on Heath - their Cantenna is a load of
>> garbage - it was designed by a real scatologist. Any electronics
>> engineer, even the ARRL, recommends a negatively exponential funnel
>> over the resistor to maintain a constant impedance; the Cantenna used
>> a straight-sided cylinder. Note, Heath never published impedance vs
>> frequency plots for this product. So, don't give us this BS that
>> because Heath recommends something that that means anything!!!
>
>	If I recall correctly, you advise us to stick to the point.  I don't 
>believe a critique of the Cantenna was the topic.  Please follow your 
>own advice.  Thank you.
>
>> Thank you for the direction to a list of US products. I read
>> everything it listed about mineral oil. The definitions there cover
>> such a wide range of aliphatic compounds with all sorts of cracking
>> temperatures, specific gravities and applications that I can't see
>> why your 'Mineral Oil USP' has any relevance to dummy loads. And
>> there was absolutely no reference to dummy load usage or to its
>> dielectric coefficient. 
>
>	As I said, the concept remains the same.  Pure mineral will work fine 
>in a dummy load.  Whatever you call the product, pure is the key. 
>Please don't attempt to cloud the issue with sidebar remarks.
>
> >Also, let's not claim that N American usage =
> > International.
>
>	I didn't make that claim.  Did you?
>
>This thread is closed as far as I'm concerned.  Your arrogance and poor 
>attitude toward positions that do not agree with yours is unacceptable. 
>  You may have differing views, and your views *may* even be correct. 
>Your delivery is crap.
>
>               Dennis
>
>Dennis Wade
>KG6ZI
>Carmichael, CA
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