[AMRadio] why i like am

[Jim in Waco WB5OXQ]

Motorola 2 way communications service monitor.  It can receive or generate 
on any frequency from around 100kc to 999.99mhz.  It has a lcd display for 
frequency error, am modulation, fm deviation, etc.  It also has a scope 
where you can see the recovered audio.  Most 2 way shops have one of these 
built by someone like ifr, Motorola, Cushman, etc.  I have one that was 
lightning damaged but I was able to get it working.  It also measures rf 
watts but only up to 120 a nd has a built in dummyload for 120 watts.  It 
does have a speaker to listen to recovered audio but hard not to get a 
feedback and no headphone jack.
----- Original Message ----- 
From: "Rob Atkinson" <ranchorobbo at gmail.com>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Thursday, December 02, 2010 6:00 AM
Subject: Re: [AMRadio] why i like am


> On Wed, Dec 1, 2010 at 10:47 PM, Jim in Waco WB5OXQ
> <wb5oxq at grandecom.net> wrote:
>  If I then set the carrier
>> control to allow 12 watts of carrier out the alc barely moves on 
>> modulation
>> and the wattmeter moves a great deal with modulation. I have not tried
>> airchecks though to see if others can hear the difference. My service
>> monitor never registers more than 80% modulation with either setting.
>
> I don't know what you mean by service monitor but this setup is
> probably the one you ought to use.  If you have a separate rx to
> listen to yourself off air that can help you check your signal.  You
> can get a cheap solid state Grundig solid state portable rx off eBay
> for $40 to $50.   Such a rx is useful for other things like finding
> RFI.
>
> 73
>
> Rob
> K5UJ
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