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

----- Original Message ----- 
From: "T Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, September 16, 2007 12:41
Subject: Re: HD Radio is alive at night and DX is still available too!


>    Steve:
>
> The hiss goes away if I switch the Super III. to narrow mode, but so does
> the signal strength.  And, yep, I know that the Super III. isn't the
> greatest radio for A M dxing.  Actually, the Super II. was better, and a
> good communications receiver with SSB capability would be the best.
>
> One of these days, I'll invest in one.  I actually have been thinking too 
> of
> getting a good HD A M radio receiver, but don't quite know what to look 
> for
> in terms of affordability and capability at this point.  Here in 
> semi-rural
> central lower Michigan, there aren't many digital AM stations yet anyway.
>
> 73 from Tom Behler:  KB8TYJ
>
>
>
> ----- Original Message ----- 
> From: "Steve Dresser" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, September 16, 2007 12:27 PM
> Subject: Re: HD Radio is alive at night and DX is still available too!
>
>
>> Tom,
>>
>> Does the hiss go away if you switch the Super Radio III to narrow mode?
>> Come to think of it, I'm not sure how much you can expect from that radio
>> for adjacent channel rejection anyway.  You'd probably be better off with
>> a
>> real communications receiver in SSB if you want to play that way.
>>
>> Steve
>>
>> ----- Original Message ----- 
>> From: "T Behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Sunday, September 16, 2007 12:10
>> Subject: Re: HD Radio is alive at night and DX is still available too!
>>
>>
>>>    Well, Bob, I think you're basically correct, although I did notice
>>> something interesting last night, which I hope isn't a sign of things to
>>> come.
>>>
>>> I noticed, with my GE Super III (which is analog, of course), that one 
>>> of
>>> the strongest digital AM signals here in west-central lower Michigan is
>>> WJR
>>> A M 760 from Detroit.  I have noticed now that, because of the sidebands
>>> associated with their digital signal, WSB in Atlanta (A M  750) is
>>> greatly
>>> attenuated, with a lot of hiss.
>>>
>>> It remains to be seen, of course, how all of this will play out, but
>>> things
>>> as far as A M  dxing aren't completely dead yet, for sure.
>>>
>>> 73 from Tom Behler:  KB8TYJ, Big Rapids, MI
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "Bob Tinney" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Saturday, September 15, 2007 11:13 PM
>>> Subject: HD Radio is alive at night and DX is still available too!
>>>
>>>
>>>> Hi All,
>>>> This is the second night that the FCC has allowed A M broadcasters to
>>>> broadcast HD radio after sunset.  There are not a lot of stations on 
>>>> the
>>>> digital band wagon yet, but I have heard about 6 stations with strong
>>>> enough
>>>> signals to occasionally trigger the digital mode in my HD radio.  The
>>>> one
>>>> that comes in the best here in southwest Michigan is
>>>> W H A M 1180khz in Rochester NY.
>>>> As to D X ing, though the band has some additional hiss on it, D X ing
>>>> has
>>>> not been impacted as much as I thought it would be.  What do you think?
>>>> 73
>>>> Bob, [log in to unmask], K8LR
>>>> Skype Name: bobtinn
>>>> Life is full of challenges, that's what makes it interesting!
>>>>
>>>
>>>
>>>
>>
>
>
>