[AMRadio] 32V-2 speech amp question


Brett gazdzinski brett.gazdzinski at verizonbusiness.com
Mon Jan 23 15:55:30 EST 2006


Because, if it does go down to say 50 cycles, 
and up to 15,000, it will be much cleaner and flatter 
running 100 to 5000 cycles.

And when conditions are good, you might want to run it 
almost hifi, a good clean hifi signal is very 
nice to listen to.

I cant say I spend much time and money in doing good sounding
audio, its more like time and money having fun with ham radio.

You want to talk cheap with communications audio, 
all you need is a cell phone really.


Brett
N2DTS


  

> -----Original Message-----
> From: amradio-bounces at mailman.qth.net 
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Jim Wilhite
> Sent: Monday, January 23, 2006 3:02 PM
> To: Discussion of AM Radio
> Subject: Re: [AMRadio] 32V-2 speech amp question
> 
> 
> ----- Original Message ----- 
> From: "Brett gazdzinski" <brett.gazdzinski at verizonbusiness.com>
> To: "'Discussion of AM Radio'" <amradio at mailman.qth.net>
> Sent: Monday, January 23, 2006 10:53 AM
> Subject: RE: [AMRadio] 32V-2 speech amp question
> 
> 
> >I agree its pointless to run hifi at 100 watts, but making the rig
> > able to run hifi, and then restricting it is a good way to go.
> 
> 
> This seems counterproductive to me.  Why expend time and money on a 
> transmitter that can pass down to 10 cycles up to 15 Kc and 
> then restrict 
> it?  Why not build one that will go down to 200 and up to 8.  
> Frequencies 
> below 200 Cy do not contribute to the information transmitted 
> and rob from 
> frequencies that do.  With some SSB groups that like to crowd the AM 
> operator, those low and high frequencies are filtered anyway.
> 
> > As far as bandwidth goes, I hear much more problems from people over
> > modulating
> > than from people running hifi audio. That may cause some ssb guys to
> > complain
> > about AM. On 40 meters last weekend, I heard 4 stations in 
> the short time 
> > I
> > was listening (Sunday morning) and 3 were over modding and 
> quite wide.
> > The scope showed they were closing down the carrier quite 
> well, and were 
> > 15
> > kc wide.
> >
> >
> > I assume most AM guys on 40 have no way to monitor their 
> modulation and
> > just turn it up to what the book says, then a little more.
> > Or they set it up on the scope, and when they operate, they 
> get excited
> > and talk louder or something.
> >
> > I feel if you are going to operate AM, you need to be able to
> > see and hear your modulation. The ssb guys do not have 
> problems as much as
> > they have ALC built into their rigs.
> >
> > Brett
> > N2DTS
> >
> 
> 
> This is a particularly bad problem near where I live.  Not 
> everyone does it, 
> but a significant few do and they cause problems for all in 
> this area.  The 
> bad thing is they don't really know how to set the modulation 
> on a scope. 
> Some of them monitor their audio signal off air and think 
> they can do it by 
> ear.  It is one thing to have a wide signal and totally 
> another to have one 
> because of overmodulation.
> 
> 73  Jim
> W5JO 
> 
> 
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