|[AMRadio] AM IARU Region 2 Bandplan|
qedconsultants at embarqmail.com
Wed Mar 10 07:35:33 EST 2010
Hi Brent: yes I agree. since getting the SDR, now about two mo ago, I see
things I never knew were there. probably repeating, but the better sounding
AM needs about 4 to 4.5 each side if the receiver can handle that, a lot do
not. that is just one reason why I stay out of the 3880 area unless a period
of low activity. I was on 3715 last night for about 2.5 hours and ssb
started to move in on both sides. I think AMers are much more aware of
bandwidth and common courtesy than a lot of ssb. I watch the display and
look for a spot that is open for 10 kc, or hopefully more. there is a group
that will fire up frequently on 3710 that clearly does not give a damn.
they send photos and it is full modulation of the entire bandwidth they are
using, about 3 kc, the rx does not like that as much as just ssb. I listened
a few days ago to see just who they were, never heard a call sign, however,
when talking to each other they used the names BUGGER and LIZARD. Again,
yes, I do have my prejudices, but it made me wonder just what sort of photos
they were sending, they were talking about a girl with tattoos at one point.
At the risk of being told I have an attitude problem, I would likely find a
way to QRT if I got a call from BUGGER or mad dog or similar. Bernie
----- Original Message -----
From: "Brett Gazdzinski" <Brett.Gazdzinski at verizon.net>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Tuesday, March 09, 2010 8:23 PM
Subject: Re: [AMRadio] AM IARU Region 2 Bandplan
>I usually limit my audio to between 4 and 6 Kc.
> I cant hear anything over 3000 Hz anyway, so it all sounds like ssb, even
> I am not on the radio!
> What I don't like, and what does all AM'ers a disservice is guys who get
> in prime time, run over 10Kc on both sides of the carrier, using a
> compressor that keeps the entire bandwidth at a high level, and takes out
> other qso's.
> If you take out 25 or 30 KHz and center at 3880, you take out 3765 to
> People see that (and with sdr radios, you CAN see it), and think why don't
> they ban that crap!
> ----- Original Message -----
> From: "Bernie Doran" <qedconsultants at embarqmail.com>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Tuesday, March 09, 2010 6:50 AM
> Subject: Re: [AMRadio] AM IARU Region 2 Bandplan
>> reading these comments about bandwidth suggests to me that there are more
>> than a few the believe under 3 kc bandwidth is fine for AM as it
>> space. if so why does one even operate AM? why not use only ssb, psk or
>> better yet do not operate at all, look at the space saved then!!! I
>> most operated AM because they like the quality of the audio produced. one
>> thing the SDR-Iq that I acquired a few months ago does rather well is
>> the spectrum, on the local BC stations they seem to limit sharply at a
>> total 15 kc. I have watched the male voice spectrum and with the
>> of the S,F and C sounds nearly all is below 5 kc each side. narrowing to
>> kc with below 300 cutoff turns those same voices into something that is
>> really pleasant to listen too. I have noticed the same effect on a few
>> are trying AM with a rice box that uses only 300 to about 3kc. the same
>> thing can be observed with the ESSB guys on the bottom of 80, they sound
>> much better, but still a little strange.
>> again, this is good reason to operate down low on 80 where there is
>> plenty of room. if there are contests it might be best to simply avoid
>> operating, not only to give the contesters a band, but to simply avoid
>> QRM created by others. However, there is so much racket no one would
>> notice if an AM station was 30 kc wide during the contests.
>> RE the comments about power, the antenna is far above every thing else,
>> listen to what the strong stations are using, rarely does an out of the
>> multiband antenna come in at the top of the heap. Dipole, open wire
>> from a good antenna matching device (balanced link coupled) is the
>> way to go with a multiband operation. The always perform well. the
>> comments about " use only the " necessary power and/or bandwidth" I
>> that to mean full quieting and the audio quality of a person sitting the
>> same room with me. It does not mean if I am on a particular freq for an
>> or so and someone decided to operate 1.5 kc away that it is my fault for
>> causing QRM to them. some of these comments sound similar to those I
>> seen where it is believed that we are supposed to be on certain freq (
>> channels) . At least there has been a lot of chatter on this topic.
>> is good. 73 Bernie
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