[AMRadio] RE: 30s-1 !

Rob Atkinson, K5UJ k5uj at hotmail.com
Thu Jan 18 16:28:37 EST 2007

think again.  ham ssb amps that are rated for 1.5 kw cannot usually be used 
for AM legal limit service for very long because:

A.  They usually do not have the cooling needed (hams all want quiet amps 
these days).
B.  They do not have power supplies that are robust enough to handle the 
demand of a carrier plus sidebands for several minutes or more.
C.  They are not designed to dissipate the heat that is generated when they 
are used as amps for AM and the 60% or so power dissipation as heat.

the 30s-1 may be an exception.  the henrys that had lots of blower cooling 
and big power supplies were probably okay.   but it's a mistake to assume 
any ham ssb amp designed for 30% duty cycle can handle legal limit AM.

rob / k5uj

From: "Ed Sieb" <esieb at sympatico.ca>
Reply-To: Discussion of AM Radio in the Amateur Service 
<amradio at mailman.qth.net>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Subject: RE: [AMRadio] RE: 30s-1 !
Date: Wed, 17 Jan 2007 14:52:40 -0500

Probably used a 4CX1000, if I'm not mistaken. If it does 1500 W
out max, then it'll do about 375 W max on AM.  If 2000W, then
500W out on AM.


Brett gazdzinski wrote:
What tube did it use?
I wonder how much AM its good for....

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