[ICOM] IC-7000 AM Modulation Problem

[D C *Mac* Macdonald]

Kinda makes you wonder if this is the procedure
that is required for  ALL  of the Icom transceivers.

73 - Mac, K2GKK/5
Oklahoma City, OK



----Original Message Follows----
From: msole at loxinfo.co.th
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Subject: Re: [ICOM] IC-7000 AM Modulation Problem
Date: Thu,  6 Apr 2006 00:00:32 +0700

An interesting point Peter.  I'd go so far as to say dropping
peak modulation depth to about 65% doesn't overly hurt
especially if you run 6dB of compression to bring down the
peak to average ratio so boosting the low level audio bits.
Professionally I am involved with aviation comms which of
course is all AM, well some digital as well now but that's
another thing again, mostly we set peak mod on the
transmitters to be about 80-85%, no reduction in
performance ever noticed.  We do have some 250 watt
carrier transmitters in service, good for 600km at times
over a sea path.

Setting your transmitter to show 25 wats carrier and
increasing the audio so it 'sounds' good is most likely
safe and adequate for most.  Amazing just how good AM
can sound, even from an Icom!

73
Martin, HS0ZED