[Test-Equipment] Dummy load
Dennis L. Wade
dwade at pacbell.net
Mon Feb 7 10:32:37 EST 2005
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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