[AMRadio] RE: 30s-1 !


crawfish crawfish at surfmore.net
Thu Jan 18 21:44:29 EST 2007


The 30S-1 will work fine in that service. It has the power supply and rugged
components to do legal-limit AM. I would not trust any of the newer amps to
do it.
                                                     Joe W4AAB
----- Original Message -----
From: "Rob Atkinson, K5UJ" <k5uj at hotmail.com>
To: <amradio at mailman.qth.net>
Sent: Thursday, January 18, 2007 3:28 PM
Subject: RE: [AMRadio] RE: 30s-1 !


>
> 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.
>
> Ed, VA3ES
> -----------------------------------------
>
> Brett gazdzinski wrote:
> What tube did it use?
> I wonder how much AM its good for....
>
>
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