[Amps] Parasitics & Filament Sag

[R L Measures]

On Aug 26, 2006, at 11:41 PM, Joe Subich, W4TV 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,
>
> Your statements concerning the tests by N7WS are completely
> inaccurate.  Your use of his graph without also reproducing
> his extensive analysis of the results is completely dishonest
> and distorts Wes Stewart's own conclusions.

I used Wes' numbers and I let the reader draw their own conclusions.   
I'm pretty sure that Wes' measurements are accurate because  
subsequent tests by another tester show a similar difference between  
a conventional parasitic suppressor and a low-Q parasitic suppressor.

> Wes was clear,
> there was no substantive difference between the nichrome and
> conventional suppressors when the value of load resistor in
> the conventional suppressor was reduced by about 35% to more
> accurately reflect the true value of the load resistance in
> the nichrome suppressor.

Thanks for the laugh, Joe.  George Orwell* called this doublespeak.
* Eric Arthur Blair. 1903-1950, author of "1984".
>
> The same conclusions have been reached by several other regular
> readers of this list and been confirmed by engineers from three
> amplifier manufacturers and two different tube manufacturers.
> The only difference between your nichrome suppressor and a
> conventional suppressor with the lower value swamping resistor
> is that the conventional suppressor shows LOWER LOSS on 10 Meters.
>
> Like patent medicines made of alcohol and opiates that were
> in such vogue before the pure food and drug act, your nichrome
> suppressors may make their users feel good but they are not a
> magic cure for the illness.
>
> That not one manufacturer of amateur amplifiers uses nichrome
> suppressors -

guffaw

> even though the marginal cost is insignificant -
> should be a very clear indication that the professionals
> consider your "science" to be without merit and your arguments
> to be completely lacking in integrity.

If I'm wrong, alternating-current circuit analysis is also wrong.
>
> 73,
>
>    ... Joe, W4TV
>
>
>

R L MEASURES, AG6K. 805-386-3734
r at somis.org