[ICOM] IC-7000 AM Modulation Problem

[David J. Ring, Jr.]

Boy, you guys are good.  25 watts carrier fully modulated at 100% does 
indeed produce 100 watts peak envelope power (PEP).

I am always amazed when I tell people that the "old standard" of having 1 kW 
carrier INPUT was equivalent to having 4 kW PEP input on AM phone.

Now AMers can only run 375 watts of carrier output - which produces 1500 
watts PEP output.

What people expect to see is 100 watts carrier fully modulated but that 
would be 400 watts PEP output.

Imagine how big the boxes would be if they were to be designed for 100 watts 
carrier full time to be plate modulated for 100% modulation?

They'd be, they'd be ... ... as big as boat anchors!

Of course the BA's were designed for that.

73

David N1EA
----- Original Message ----- 
From: "Larry Harrison" <harrisonl at comcast.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Tuesday, April 04, 2006 11:27 PM
Subject: Re: [ICOM] IC-7000 AM Modulation Problem


Adam

Yes this is what I thought all along.  That is why I used 25 watt carrier in
my original post and tests. The PEP output at 100% modulation would be 100
Watts. (4 X Carrier)  meeting the PA PEP rating for any 100 Watt PEP
transmitter.

Regards, 73
Larry K3JRR


----- Original Message -----