[Elecraft] (no subject)

[Tom W8JI]

Hi Jim

If you are interested in the details of AM you can read it here:

http://www.w8ji.com/amplitude_modulation.htm

Since the ratio of peak power to carrier is 4:1 in a symmetrically modulated 
AM signal, the carrier power must be 25 watts or less with a 100-watt PEP 
radio. I'm sure the K3 would be fine at 25 watts carrier, but without a 
suitable scope and to be safe and allow for any asymmetry in modulation it 
is a good idea to run less.

73 Tom


----- Original Message ----- 
From: "Jim Harris" <w0em at q.com>
To: "Elecraft Email" <elecraft at mailman.qth.net>
Sent: Saturday, June 19, 2010 12:37 PM
Subject: [Elecraft] (no subject)


>
> Hi,
>
>
>
> Recently I was able to do a QSO on AM for the first time using my K3.
> Yes, I have the 6 Khz filter installed.  As I was setting power I found I
> could dial in about 100 watts the same as SSB.  Realizing that would
> over work the PA I brought it back to 25 watts and had a very nice QSO
> with a good audio report.  Afterward, I checked the specs and
> instructions in the Owner's Manual and could find nothing about AM power
> rating.
>
>
>
> What should be the power rating for the K3 when transmitting AM?  Please
> put that information in the manual.  Would it be possible to limit the
> AM power with a software update to eliminate the chance of
> transmitting a signal that might be illegal and/or to prevent possible 
> damage
> to the KPA3?
>
>
>
> Thanks and have a great day.
>
> CU in the Colorado QSO Party Sept 4th, 2010.
>
> 73,  Jim, W0EM
>
>
>
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