Steve:

I'm going to wait for a while before I do anything about HD radio receiveing 
equipment, exactly because of what you are saying.


Heck, for the money I might spend on something like that, I could almost buy 
another piece of ham gear, or save a substantial amount of money toward 
something of that nature.

It'd be nice if money weren't an object, but we all know that's not the 
case.

Thanks for all the helpful information.

73 from Tom Behler:  KB8TYJ

----- Original Message ----- 
From: "Steve Dresser" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, September 16, 2007 12:53 PM
Subject: Re: HD Radio is alive at night and DX is still available too!


> Tom,
>
> Unless you're really hot to trot, I'd wait.  Some people are speculating
> that HD radio won't last on AM because it's not really practical.  You'll
> spend between $200 and $250 for a tabletop HD receiver, or you can get a
> tuner to connect into an existing stereo system for $200.
>
> The reason for the signal attenuation is that the sidebands from the
> adjacent channel station at 860 are swamping the radio's AGC circuits,
> probably because the station itself is overmodulating.  That's pretty 
> common
> with AM stations; they usually modulate at 110% or better if they can get
> away with it.  On analog stations, you'll notice that their audio 
> splatters
> over to the adjacent channel for the same reason.  Of course, you may not
> notice the attenuation as much because the audio peaks aren't as constant,
> but it's still there.
>
> Steve