John,
Apology not necessary. I did not take it in any negative manner.
And, just for the record, I really did do what I said. This was all
early in the life of CB licenses and before the "Hey Good Buddy" craze
hit the airwaves. Soon after that happened, I gave it up. Could not
handle all of the lack of respect being shown by every truck driver with
a microphone.
And, back then a CB with a linear amp was the poor man's way of talking
long distance using skip when we could not afford to become amateurs or
Hams. Or could not fathom the need to learn Morse code. But we did use
caution and discretion. If anyone ever complained about our use, we
always backed down and cleared the air. Last thing we wanted was one of
those rolling FCC vans to show up in our neighborhood with their DF
antennas turning round. We had fun and learned a lot. But once the movie
"Convoy" came out, it was all down hill from there.
Scott
On 9/13/2015 5:12 AM, John Allen wrote:
Scott
I think I need to apologise for the tone of my earlier email – a bit
OTT w.r.t. yourself on reflection !
John Allen
*From:*John Allen [mailto:john_e_al...@blueyonder.co.uk]
*Sent:* 13 September 2015 08:51
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* Re: [PSES] RF Common Mode Immunity Test Question
“Lazyboy”
You may not have, and, as a licenced Amateur, I am sure you would not
because you know that you should not, and that there are better and
more challenging ways to talk to your faraway friends – but I don’t
think that some CB operators are as “conscientious” J.
John Allen
W.London, UK
*From:*Scott Douglas [mailto:sdouglas...@gmail.com]
*Sent:* 12 September 2015 23:13
*To:* John Allen; EMC-PSTC@LISTSERV.IEEE.ORG
<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
*Subject:* Re: [PSES] RF Common Mode Immunity Test Question
Well, I never hooked up a 1 kW linear amp to my 5 W CB radio to talk
to South America. And woke the neighbors on Sunday morning so they
could listen to me on their turned-off console radio receiver...
So says
Lazyboy
KDT-8165
On 9/12/2015 12:37 PM, John Allen wrote:
FWIW, 27MHz sounds more like a CB station rather than an “real”
Amateur station which (IIRC) would be using the 28MHz band – and
CB operators (especially in some countries! ) may use illegal amps
(“boosters”) to raise the transmit power beyond the legal limits!
John Allen
W.London, UK
*From:*dward [mailto:dw...@pctestlab.com]
*Sent:* 12 September 2015 20:00
*To:* EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
*Subject:* Re: [PSES] RF Common Mode Immunity Test Question
I agree -an amateur could not and would not use a call sign other
than his or her designated licensed call sign. No blue leader, no
quacking duck, nothing but respective number licensed to him or her.
Sent from my Verizon Wireless 4G LTE smartphone
-------- Original message --------
From: "ce-test, qualified testing bv - Gert Gremmen"
<g.grem...@cetest.nl <mailto:g.grem...@cetest.nl>>
Date: 9/12/2015 11:25 AM (GMT-08:00)
To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] RF Common Mode Immunity Test Question
A Ham never can be a source of interference, by definition (if they
respect their limits- in more than one way).
To me an amateur is not a HAM, but that is a matter of language I
suppose.
My example showed a (spiced up) example of lack of immunity in a
professional audio installation , that due pragmatic testing, too
cables
with average screening properties
and a substantial power output in a "room" with may-i-say very
specific
acoustic properties, lead to an extremely interfering situation.
Gert Gremmen
Van: Ed Price [mailto:edpr...@cox.net]
Verzonden: zaterdag 12 september 2015 20:09
Aan: ce-test, qualified testing bv - Gert Gremmen
Onderwerp: RE: [PSES] RF Common Mode Immunity Test Question
Gert:
Allow me to fine tune your story for accuracy. In the late 1950's, the
USA FCC re-allocated the 27 MHz region (called 11 meter band) from
amateur use to a new "citizens" band. (I don't know how many other
countries followed that example.) This was created from the existing
amateur 10-meter band, making amateurs rather unhappy. This 11-meter
Citizens Band eventually degenerated into unregulated technical and
operational chaos. If you had a device exhibiting a susceptible
response
of a "blue angel calling a red devil" and not something like "WB6WSN
calling..." then the source was not an amateur but an unregulated
CB'er.
Please, hams are sensitive about being the assumed source of
interference.
Ed Price
WB6WSN
Chula Vista, CA USA
-----Original Message-----
From: ce-test, qualified testing bv - Gert Gremmen
[mailto:g.grem...@cetest.nl]
Sent: Saturday, September 12, 2015 10:18 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] RF Common Mode Immunity Test Question
This is a typical standards clause included in a standard by non-emc
"experts".
What is a metal enclosure, and when is it not enclosure ?
Metalized plastic: is not metal but might be as good Painted metal:
complies but may have substantial potential difference between parts
If heavy interference exists, 4 braid connection points are not
enough,
and inferior braided coax and signal cables is all over the market.
This is an example of economic drive "fast cheap & pragmatic
testing"
and this exemption clause
is a recipe for problems in the field.
I remember a customer of mine building PA systems for a church
application ( = 55103-2) Final testing was ok, and the system worked
like a charm.
The first Sunday in real use, the vicar got an unexpected reply on its
questions to the mighty when a local 27 MHz radio amateur switched on
its transmitter and "preached" : "blue angel calling red devil "....
Gert Gremmen
ce-test qualified testing bv
-----Oorspronkelijk bericht-----
Van: John Woodgate [mailto:j...@jmwa.demon.co.uk
<mailto:j...@jmwa.demon.co.uk>
<mailto:j...@jmwa.demon.co.uk%0b%3cmailto:j...@jmwa.demon.co.uk%3e%20>]
Verzonden: vrijdag 11 september 2015 16:48
Aan: EMC-PSTC@LISTSERV.IEEE.ORG
<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Onderwerp: Re: [PSES] RF Common Mode Immunity Test Question
In message
<6165069ea399fe46b1a5148bcb1a75ebd...@ex-ukha-01.ad.s-a-m.com
<mailto:6165069ea399fe46b1a5148bcb1a75ebd...@ex-ukha-01.ad.s-a-m.com
<mailto:6165069ea399fe46b1a5148bcb1a75ebd...@ex-ukha-01.ad.s-a-m.com%0b%3cmailto:6165069ea399fe46b1a5148bcb1a75ebd...@ex-ukha-01.ad.s-a-m.com>>
>,
dated Fri, 11 Sep 2015, Robert Dunkerley
<robert.dunker...@s-a-m.com <mailto:robert.dunker...@s-a-m.com>
<mailto:robert.dunker...@s-a-m.com> > writes:
>Would this not imply that nearly all types of signal cables (most
are
>screened this way?) would be exempt from this test, or is my
>understanding totally wrong? (probably the case!)
Not all products have a metal case. Not all ports meet the
definition of
'screened port'. Not all cables have braided screens/shields.
--
OOO - Own Opinions Only. With best wishes. See
www.jmwa.demon.co.uk <http://www.jmwa.demon.co.uk>
<http://www.jmwa.demon.co.uk> When I turn my back on the sun, it's to
look for a rainbow John Woodgate, J M Woodgate and Associates,
Rayleigh,
Essex UK
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