On Sat, 15 Jul 2006 22:37:55 -0700, "Peter Duniho"
wrote:

"Don Byrer" wrote in message
.. .
I discovered, once I started using an FM transmitter with my MP3 player in
the car, that once my FM transmitter is turned off, the car radio will
pick
up the ATIS broadcast on the frequency I'm using for the FM transmitter
(107.3...but I doubt it matters much).

Hmm...inquiring minds want to know...is the ATIS around 128.7-128.9
'ish???


As a matter of fact: 128.65

I guess that's "around" 128.7

Close enough...within the bandwidth anyway...think about how well you
can receive a strong FM station at "one channel off" may be fuzzy,
but understandable. And this being AM, it may come in clear quite a
few KHz off...even on an FM radio.

I should mention that this particular car radio is highly susceptible to
radio interference generally. Down at the lower end of the "dial", say
93.3-ish and below, it's quite common for me to get interference from cell
phone towers. Or, at least it's my presumption that it's cell phone towers,
since they are pretty much the only ubiquitous kind of RF interference that
I know of.
Could be all the other transmitters....VHF/UHF comms, paging, etc,
that may ALSO be on those towers...

When the interference happens, whatever I'm listening to turns to
high-volume static, without any intelligible signal at all. It practically
never occurs while I'm standing still, so presumably I'm moving into
interference range and then back out (the interference generally lasts
between 30 seconds and a few minutes, depending on how fast the car is
moving and whether I get stuck at a light ). And it never happens on the
higher frequencies (when I do get static, I can just switch to a
higher-frequency station and everything is fine there).

been dere, done dat...not the high/low freq difference, but it
happens.

--Don
Don Byrer
Radar Tech & Smilin' Commercial Pilot Guy
Amateur Radio KJ5KB
kj5kb-at-hotmail.com

"I have slipped the surly bonds of earth; now if I can just land without bending the gear..."
"Watch out for those doves...smack-smack-smack-smack..."