Amps
[Top] [All Lists]

[AMPS] failures

To: <amps@contesting.com>
Subject: [AMPS] failures
From: measures@vc.net (Rich Measures)
Date: Sat, 8 Nov 97 08:44:50 -0800
>In a message dated 97-11-08 09:12:19 EST, you write:
>
><< [snip]
> 
> >Rich, although being blessed with a silver tongue,  is unfortunately 
> >an example of Pathological tunnel vision  science at its very 
> >worse. I'm sure he honestly believes in what he says, unfortunately 
> >it is 99% nonsense.
> 
> Frankly, I could care less whose THEORY is right so long as somebody has a
> CURE for the problems which the contrasting theories attempt to explain.
> 
> Mr. Measures' "cures" work; nobody else has yet come up with any better
> explanation of WHY they work, much less any better "cure". I think I'll go
> along with what works, no matter how "silver-tongued" Mr. Measures might
> sound, thank you very much, Mr. Rauch.

OTOH, Mr. Rauch did turn out to be 'absolutely correct'.  One can build a 
silver conductor VHF parasitic suppressor for a 3-500Z that has a lower 
VHF-Rp than a resistance-wire VHF suppressor.   For instance, a 200nH Ls 
and a 200 ohm Rs.  The resultant Rp is only 60 ohms at 100MHz.  This is 
clearly better than the 101 ohms for the nichrome-60 resistance-wire  
suppressor {Wes, N7WS} -- and it is way better than Mr. Rauch's 
suppressor for the AL80B, which Wes measured at 166 ohms.  .  .  However, 
the trade-off with the clearly-superior admittedly-lovely 
highly-conductive silver strap Ls, is that Rs is going to dissipate 43w 
at 29MHz -- which is hardly good news for your typical 3W-rated  MOF 
resistor.  -  -  Thus, the advantage of a resistance wire Ls is that it 
reduces VHF-Rp - without increasing the dissipation burden on Rs.  {Mr. 
F. E. Handy wrote about resistance-wire VHF suppressors on page 72 of the 
1926 *...Handbook*.}   


The laugher is that Mr. Rauch probably realized this in in December, 
1996.  The rope began to unravel on 28 November, 1996 when Mr. Rauch 
proposed that We add 5 ohms of ESR to Ls and perform some calculations.  
However, he quickly cancelled his post, and he has stonewalled the 
subject ever since. .  .   Ironically, when Wes measured a typical 
nichrome resistance-wire Ls, the 200MHz ESR turned out be 4.99 ohms!

-  So, where does one buy a a sub10nH 200 ohm resistor that can dissipate 
45w?  Not at Radio Shack (tm).    Cesivid, Inc. [716 286 7610] can make 
such resistors.  Their rep told me that a minimum order would be 1000 
pieces at roughly $11 each.  
> 
> Let's knock off the vitriolic personal attacks, please, people... ...snip...
> 
There is always a tender nerve behind the bull's-eye.  

> Geez...this reminds me of the medicine man versus the shalaman.
-  -  or maybe the not-an-expert versus the self-declared 'expert'.
 
> 73, Steve Ko0U/1
>  >>
>
>Here here Steve! 
>It was so nice...the last month or so...with no pissing contest going on !
>Lets see...who was missing?...Oh ya...that W8 STATION!
>TG - W6TG

In a debate, if you aren't sure who won, it's a pretty sure bet that the 
guy who fired off the most piss is the one who lost.  

---Rich---

R. L. Measures, 805-386-3734, AG6K   


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm

<Prev in Thread] Current Thread [Next in Thread>