----- Original Message -----
From: "Brett gazdzinski" <[EMAIL PROTECTED]>
To: "'Discussion of AM Radio'" <amradio@mailman.qth.net>
Sent: Monday, January 23, 2006 10:53 AM
Subject: RE: [AMRadio] 32V-2 speech amp question
I agree its pointless to run hifi at 100 watts, but making the rig
able to run hifi, and then restricting it is a good way to go.
This seems counterproductive to me. Why expend time and money on a
transmitter that can pass down to 10 cycles up to 15 Kc and then restrict
it? Why not build one that will go down to 200 and up to 8. Frequencies
below 200 Cy do not contribute to the information transmitted and rob from
frequencies that do. With some SSB groups that like to crowd the AM
operator, those low and high frequencies are filtered anyway.
As far as bandwidth goes, I hear much more problems from people over
modulating
than from people running hifi audio. That may cause some ssb guys to
complain
about AM. On 40 meters last weekend, I heard 4 stations in the short time
I
was listening (Sunday morning) and 3 were over modding and quite wide.
The scope showed they were closing down the carrier quite well, and were
15
kc wide.
I assume most AM guys on 40 have no way to monitor their modulation and
just turn it up to what the book says, then a little more.
Or they set it up on the scope, and when they operate, they get excited
and talk louder or something.
I feel if you are going to operate AM, you need to be able to
see and hear your modulation. The ssb guys do not have problems as much as
they have ALC built into their rigs.
Brett
N2DTS
This is a particularly bad problem near where I live. Not everyone does it,
but a significant few do and they cause problems for all in this area. The
bad thing is they don't really know how to set the modulation on a scope.
Some of them monitor their audio signal off air and think they can do it by
ear. It is one thing to have a wide signal and totally another to have one
because of overmodulation.
73 Jim
W5JO
