[Johnson] Richard Measures

[Jim Brannigan]

Lets set the record straight.  Eimac did not bitch about Measures articles,
the amplifier manufacturer's did. Read his web site.
I'm a MBO business man (Management by objective) "if it works you use it"
Most engineers I've run into spend all their time theorizing and eventually
run up their own butts in conclusion.
Measures has come up with answers.   Try them or not, but he doesn't talk
about how many angels can stand on the head of a pin.
The Measures parasitic suppressors have been in my SB-220 for over 15 years.
It does not spit, burn wafer switches, or tubes.  I don't care if his theory
is strange, it works......
That is the bottom line.

Jim





> I will throw in the towel about Richard Measures -- I know he has his
> following. However, engineers are not among them, to my knowledge.
>
> If you stop and consider what a parastic oscillation is, you will
understand
> that it is cured by bringing its frequency down to the frequency where the
> tube is self neutralized. The parastic is then killed (suppressed) by
> loading it with resistance. That's a fact. Using Nichrome wire according
to
> Measure's voodoo concepts a very strange approach, to say the least.
Rather,
> the use of a parallel tuned circuit with decent copper wire is a much more
> sound approach.
>
> Now, that said, it is entirely reasonable that a parallel turned circuit
> using Nichrome wire will work, PROVIDING the parallel tuned circuit with
the
> Nichrome wire just happens to lower the freqency of the parastic to a
better
> point where the existing circuit can deal with it. There are lots of
> variables. But it is the luck of the draw, it is not sound science, and it
> is not the best way. And it has nothing to to with Nichrome wire. But if
it
> works for some hams -- Great! I am sincere about that. And Mr. Measures
has
> made some sales, too. It's hard to make a dollar, and I admire his hard
> work.
>
> However, I am puzzled by the report in this thread that parasitics had
> burned up a band switch. That's hard to understand -- unless there is
> another problem occuring, or the switch were rotated with RF on it .. or
> maybe even if the rig were being tuned into a reactive load. Amplifiers
> prefer 50 ohms j0, and I've run into hams loading their finals into all
> sorts of really wacky loads, which causes a real wreck in the final. To
that
> end, for the folks who are reporting success with the Measures parasitics
> kits, I would be curious to know what the frequency of the parastic was
> before the Measures Nichrome modification, and afterward. That would be
> really useful information.
>
> By the way, Mr. Measures earned the wrath of Eimac (and I don't blame
them)
> when he alleged that Eimac tubes had internal parastics. Excuse me? That
is
> ridiculous. Parasitics are caused by external elements, not internal.
> Period.  And it embarassed the heck out of QST.And it should have
embarassed
> them.
>
> I'm fortunate to have a friend who is an electrical engineer who was so
> incredulous by the Measures views on parasitics that he even called Mr.
> Measures on the phone and reprimanded him for foisting that stuff on the
> amateur radio community.
>
> In truth, Measures has written some good stuff. But he has also written
some
> bad stuff, and his understanding of parasitics is questionable. And I know
> of rigs that were really toasted when some Richard Measures modifications
> were installed. And yet, we have here in this thread some testimony that
it
> worked. That reinforces my belief that some of his improvements DO work,
but
> (like I said ) they work by the luck of the draw. But what works, works!
>
> I have always wondered if these rigs with the Measures mods really are
> stable -- if they are completely parasitic free. Maybe yes, maybe no. Not
a
> lot of hams know how to run a rig through its paces to see if it has
> parasitics.
>
> But, again, I have no desire to debate this author's view of the world,
nor
> to anger those who have had luck with his approach -- except to say I am
> troubled by his views on parasitics.
>
> I will let the matter drop.
>
> Thanks.
>
> Richard, WB5NEN
>
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