[Amps] Parasitics & Filament Sag

[R L Measures]

On Aug 27, 2006, at 12:22 AM, Ian White GM3SEK wrote:

> R L Measures wrote:
>>> N7WS made independent measurements of this.
>>
>> N7WS, Wes, was the man who single handedly ended the grate parasitics
>> debate between Tom and me by measuring the Q and parallel- 
>> equivalent R
>> (Rp) of a conventional parasitic suppressor and that of a low VHF-Q
>> parasitic suppressor -- And publishing the results without first
>> consulting with Tom. The results:
>> http://www.somis.org/Rp-comp.html
>>
>
> :
>
> Rich gives only one part of the story. For the information of relative
> newcomers, "let the record show" the other part as well:
>
> N7WS categorically disagreed with Rich's interpretation of his
> measurements. He considered that Rich had misused the data in his web
> pages.

 From the beginning of the Grate Parasitics Debate alt.amateur- 
radio.homebrew, N7WS, Wes had been in the Rauchian camp.  Wes was one  
of the few in theSince Wes correctly realized that the Q of a VHF  
suppressor could be reduced to whatever was needed by simply  
increasing L-supp and increasing R-supp, he argued against the  
benefit of resistance wire in VHF suppressors.  IOW, it is possible  
to make just as low of a Q VHF-suppressor aut of silver or copper  
wire as it is with resistance wire.  However, the tradeoff with using  
a metal with high conductivity is that doing so - for the same Q  
result - increases the dissipative burden on R-supp .  Wes apparently  
did not realize that the reason I use resistance-wire to achieve  
lower VHF suppressor Q and lower Rp - which lowers VHF gain - was  
because there was no off the shelf source of MOF resistors of  
sufficiently low inductance that could dissipate the additional power  
caused by using a virtually lossless conductor material such as  
silver or copper.
   The day after Wes' measurements were published, I received a  
telephone call from a friend in Maine informing me that following  
Wes' publication of his measurements, Tom had gone on a somewhat  
fuzzy tirade on 160m that lasted into the wee hours.  A pall fell  
over the Rauchian camp.  A few days later, they accused me of doing  
the teenage girl who was doing mail orders for low-Q parasitic  
suppressor retrofit kits. After that, they left en-masse.  Shortly  
thereafter, I got an e-mail informing me that Tom et al. had moved to  
the AMPS reflector.  After subscribing to AMPS, I received a  
telephone call from AMPS moderator-censor-administrator informing me  
that he had followed the debate on alt.amateur-radio.homebrew and  
that I was under suspicion.  The special treatment struck me as a bit  
odd.   The debate on parasites with Tom continued and I was  
jackbooted off of AMPS.  I got the impression that AMPS was a part of  
the Rauchian camp that was intended to protect Tom from unmoderated  
discussions like the misfortunate one that had just taken place on  
alt.amateur-radio.homebrew.
>
> Although N7WS cannot prevent Rich from re-publishing his own
> interpretation of the measurements, Wes Stewart does not wish to be
> associated in any way with Rich's web page.

  Ian --   Interpretation?  Are you suggesting that there is more  
than one type of Q ?
>
>
>
> -- 
> 73 from Ian GM3SEK
> http://www.ifwtech.co.uk/g3sek
>
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R L MEASURES, AG6K. 805-386-3734
r at somis.org