[RFI] Old wives tail, or true?

[Cortland Richmond]

Tweren't me neither -- but I had a similar background; Ham Radio had 
gotten me going as WV6CCP, some time around age 15 or 16.


When I retired from the Army and  interviewed at Wang Labs in 1983, they 
grabbed me, diploma or not.  The Secret clearance needed for TEMPEST 
*and* troubleshooting experience was a  hard to find catch -- and I had 
a career employed or contracted via engineering firms or other employers 
and even some contracts after  I retired from GE Aviation (formerly 
Smiths Aerospace ) .


EMC we encounter in our hobby is almost all Physics 101,  QUITE common 
in an Avionic MOS in the Army, and I'd given a few "lunch and learns" 
for engineers later who didn't know how to get rid of the noise.; all of 
us who were in EMC will know what they don't learn and sometimes can't 
understand.

My last project-at GE Aviation was to teach the EMC portion of an 
Engineering A Course to degree'd new-hires.   The head instructor told 
me not to have them calculate the area of a sphere.... Heck I'd learned 
about that when I was 8, using flashbulbs on a box camera.

And so it goes.

Time to put  antennas back up in the trees. and get back on CW again.



Cortland


.On 4/9/2021 6:07 PM, David Eckhardt wrote:

> Who wrote EMC guru"?  It wasn't me!!!!
>
>    I just stated at the end that I had taken the referred Henry Ott courses
> at HP's expense and the Howard Johnson's 4-day course at the expense of
> StorageTek.  I don't consider myself a "guru", just been doing this for
> some 35 years professionally and still do a bit of consulting.
>
> I try my best not to blow my own horn.  If you believe it was me, I beg
> forgiveness.
>
> Dave - WØLEV
>
> WIKI on ABBREVIATIONS I (and others) commonly use:
>
>       CMC = Common Mode Choke
>       DM = Differential Mode
>       CM = Common Mode
>       RF = Radio Frequency
>       MHz = MegaHertz (or maybe for us fossils, Megacycles)
>       Ω = Ohms (complex or pure resistance)
>       Zo = Characteristic Impedance
>       Zs = Source impedance
>       Zl = Load impedance
>       j = + or - and represents the complex portiin of an impedance....
> minus is capacitive or bottom of the Smith Chart........positive is
> inductive or top of the Smith Chart
>       R = pure resistance (no reactance)
> ask about others......
>
> On Fri, Apr 9, 2021 at 8:58 PM Wes Stewart via RFI <rfi at contesting.com>
> wrote:
>
>>   I'm sorry, I can't help myself...
>> Wes  N7WS
>>
>>      On Friday, April 9, 2021, 11:04:31 AM MST, Jim Brown <
>> jim at audiosystemsgroup.com> wrote:
>> "(Please use WORDS,not abbreviations)"
>> And then goes on to write:
>> "EMC guru"
>>
>> 73, Jim K9YC
>>
>>
>>
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>