[Heathkit] Suggestion for legal limit AM amp (was Heath Warrior as an AM amplifier)

[Bry Carling]

Good observations.  Most of the good older AM/CW receivers I have owned had an AVC 
control on them though, including my very first one - an R1155A receiver.
I love the sound of a DX60.

On 17 Jan 2012 at 13:12, Richard Knoppow wrote:

From:           	"Richard Knoppow" <1oldlens1 at ix.netcom.com>
 
> ----- Original Message ----- 
> From: "Robert Nickels" <ranickel at comcast.net>
> To: <heathkit at mailman.qth.net>
> Sent: Tuesday, January 17, 2012 9:36 AM
> Subject: Re: [Heathkit] Suggestion for legal limit AM amp 
> (was Heath Warrior as an AM amplifier)
> 
> 
> > On 1/17/2012 11:04 AM, Carl wrote:
> >> The T Bolt is a bit weak in the PS for extended old 
> >> buzzard transmissions
> >> from what Ive heard on the air and read elsewhere.
> > Carl,
> >
> > Based on your amplifier experience, wonder what you think 
> > about driving
> > linears with controlled-carrier AM exciters?   I've not 
> > tried it myself
> > but hear guys on the air all the time running rigs like 
> > DX-60s,
> > FT-101-series, and even some riceboxes that seem to work 
> > quite well.
> > The lower resting carrier level would seem to be a way of 
> > getting some
> > good power out of the lower-rated linear amplifiers like 
> > the Warrior.
> >
> > All I know is that the audio quality can be very good, 
> > although it is
> > important to set the proper carrier and modulation levels. 
> > Just
> > listening to these stations on AM nets, I can't tell the 
> > difference vs.
> > high-level modulated stations.   I'm guessing that a PEP 
> > wattmeter would
> > be the best way to set up the combination to  operate 
> > within legal limits.
> >
> > 73, Bob W9RAN
> >
>      I think the main advantage of a controlled carrier AM 
> rig is that it _is_ compatible with linear amplifiers. This 
> is because the _average_ level is low since it follows the 
> modulation. Essentially, the rig is modulated nearly 100% 
> all the time except for the residual carrier. The only 
> problem I've observed with it is that the AVC in normal AM 
> receivers (fast AVC) tends to follow the carrier and pumps 
> unpleasantly. For an SSB receiver with slow AVC this is not 
> so much of a problem. For older AM receivers using manual 
> gain may result in better sound.
> 
> 
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com 
> 
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