700MHz Kickout Notice

Sun Feb 07, 2010 11:11 pm   

http://www.pcworld.com/article/187024/fcc_tells_wireless_mics_to_get_off_700mhz_spectrum_band.html

Dave.

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Mon Feb 08, 2010 1:22 am   

"David L. Jones" <altzone_at_gmail.com> wrote in message
news:Y%Fbn.23529$aU4.8021_at_newsfe13.iad...

Pretty good article, although I'd point out...

-- The vast majority of those wireless users were never authorized in the
first place, and were initially sold to (almost always ignorant) customers by
unscrupulous professional sound companies. Over time it became a very
well-known secret and -- since the FCC didn't respond -- an accepted practice
even among nominally above-board companies. The FCC clamping down is
unfortunately going to hurt some of those customers, particularly small vanues
such as churches and schools.

-- The idea that a lack of spectrum is what caused public safety agencies to
be unable to communicate with each other on 9/11 is almost entirely a red
herring: The biggest factor is probably numerous proprietary,
incompatble-with-each-other (often by design, to try to force vendor lock-in)
radio systems out there. Indeed this is what prompted the APCO P25 standard,
which began cookin in the '90s. Other difficulties with 9/11 is that, for any
large scale situation like that, there's inevitably some amount of
interference and desense when you have thousands of radios all end up in the
same place at the same time. And finally, many of the radios didn't work
particularly well just given the sheer height and reinforced-concrete nature
of the World Trade Center building itself.

-- Those Public Interest Spectrum Coalition folks are really the "we want
faster mobile Internet coalition." There's nothing inherently wrong with
that, although I think that -- like almost all coalitions today, it seems --
the name doesn't accurately reflect what they really want.

---Joel

Mon Feb 08, 2010 4:10 am   

David L. Jones wrote:

Thanks! That'll affect both Joerg & me, and possibly others in
the newgroup. AFAIR, he's got Sennheiser in his church - mine's
Shure. We'll both have to check the frequency to see if we need
to replace them.

Ed

Mon Feb 08, 2010 5:31 am   

On Feb 7, 6:22 pm, "Joel Koltner" <zapwireDASHgro...@yahoo.com> wrote:

If I may just add my $0.02 here...
First, you're right. 700 MHz wireless mic were no secret at the FCC.
The carriers (Verizon & AT&T mostly) want the mics gone so they can
build out their LTE networks ASAP.
It really doesn't have anything to do with Public Safety.

But speaking of Public Safety, I (respectfully) submit that one reason
communications were so screwed up on 9/11 is that the WTC was the
"Command Center" for the city's emergency network operations center.
Well that, and the whole city is unionized. And the last thing you
want is an "electrician" running coax for you. They don't seem to get
the concept of "minimum bending radius", and stuff like that.

I was invovled with several radio projects on the 83rd floor at
Empire. We would wait until after all the union guys left, then re-do
their work. It cost 2X+ time & materials, but at least the radios
would work.
I offered to pay them to just sit around and do nothing, while we did
the work, but they wouldn't go for it.

Mon Feb 08, 2010 10:51 pm   

"mpm" <mpmillard_at_aol.com> wrote in message
news:27dba9c8-9064-478b-933a-ec1aa837ea23_at_y33g2000yqb.googlegroups.com...

Wow! I thought it was bad when I heard a somewhat similar tale from a guy I
used to work with -- albeit with PLC control/power wiring rather than coax --
but in that case the union guys *were* willing to sit around and "supervise"
him doing the actual work.

Mon Feb 08, 2010 11:09 pm   

Joel Koltner wrote:

A guy who did service in Australia was _summoned_ into the office where
he was read the riot act because he had dared to do the unthinkable. He
had closed up an electronics cabinet after fixing the electronics.
Screwing the door back on was according to the union not the job of an
electronics guy. The fact that the other guy would have had to drive
tens of miles to the location left them completely unimpressed. The fact
that no radio link was available out there and that dirt could otherwise
get in was brushed aside as well, it didn't matter. Pathetic.

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Regards, Joerg

http://www.analogconsultants.com/

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Mon Feb 08, 2010 11:27 pm   

On Mon, 08 Feb 2010 13:09:18 -0800, Joerg <invalid_at_invalid.invalid>
wrote:


I got called on the carpet at MIT (Building 20 MHD Lab) for ordering a
400VDC wire-up, waiting forever with no-show after no-show, finally
doing it myself. When the unionized electrician finally showed I told
him to go away.

Head of RLE (Research Laboratory for Electronics) calls me into his
office, with a union steward standing there. Starts to chew on me. I
interrupt him, "I'm a student here, you two can GFY!", and walked out.
Never heard another word

...Jim Thompson
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Tue Feb 09, 2010 1:13 am   

ehsjr schrieb:

<http://www.sennheiser.com/sennheiser/home_en.nsf/root/press_archive_3-2007_17.09.2007>

Wed Feb 10, 2010 1:11 am   

Reinhard Zwirner wrote:


Also, most of that gear is programmable so you can move it below 700MHz.
Older gear may have to be re-crystaled and aligned but that's not
super-expensive.

--
Regards, Joerg

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Wed Feb 10, 2010 9:05 pm   

On Sun, 07 Feb 2010 21:10:27 -0500, ehsjr <ehsjr_at_nospamverizon.net>
wrote:


Yeah, thanks! I had done a sound system at the city a couple of years
ago, and needed to be sure that the Shure mics I used weren't on the
list.

Charlie