On Sun, 16 Jul 2006 17:16:44 GMT, "peter" wrote:

I want to buy a wireless mic set and it comes in one of three bands that I
have to choose at the time of purchase:

518 to 554 MHz
626 to 662 MHz
740 to 776 MHz

The goal is to pick the band with the least interference.

The manufacturer's web site has a table showing TV stations in my city
(seattle), and it look like it's clear in the 740 to 776 MHz range. So
should I buy the set in this range or is there more research to be done?

If you're in a small city (it sounds as if this is the case), you
don't have to worry too much. If not, the only "research" that would
do you any good, aside from [tie in to a scanner group] listening and
finding out which band actually is the least used, would be finding
out which bands will be used more heavily in the future, and that's
impossible.

You may want to research how wireless mics actually work. Unless
you're looking for very long range (illegal) with large antennas
(illegal), you probably won't have anyone else running a wireless mic
close enough to your site to have to worry about it. If the situation
is indoors, it's even better for you - you have some control over
ambient signals.

BTW, they said the table is created in 2002. Does anyone know where to find
an updated frequency usage table for a given city?

The FCC's web site, but it's not easy getting that information out of
the database. There's no site I know of that'll present it to you in
the simple way Sennheiser did in that table.