Re: [IRCA] Seattle's 1090 Now Using IBOC

["Rick Lewis" <ricklew@xxxxxxxxxxxxxx>]

Hi Dennis,
Let me see if I can remember the model number
Sony Xdr S3-HD (could be SDR, I'm going from memory.)
It's similar to an unamplified unit (F1HD), which many FM DXers use.
I use it mainly for FM DXing. I don't think it's been available since 2010 
or 2011.
I agree about HD, both in its AM IBOC form and on FM, where, like AM, it 
takes up two adjacent frequencies.
However, HD radios need to be selective on FM, and the Sony is both quite 
selective and sensitive, which is why I bought it.
The downside to the Sony is that it "stores" digital FM frequencies, so if 
an HD is off, it takes several seconds for it to register no HD on a 
previously active HD sideband.
The only ways I know of to defeat this, at least for a nontechnical guy like 
me, is to turn off the unit for two minutes or more, and then the memories 
and HD placemarkers are erased, along with the tone and stereo settings; or, 
disconnect antennas and patch cords, thus possibly weakening signals so they 
don't decode.
FM stations with only the main HD channel, as well as AM stations, aren't 
subject to this behavior.
Several other HD radios I've seen don't have this "feature."
For the curious, picture a 93.1 with two additional HD channels. 93.1-1 is 
the main, but turning the dial once yields the space where 93.1-2 would be, 
and then the space for 93.1-3.
If you've listened to those extra channels instead of rapidly tuning past 
them, those empties are stored. Next time you want to check 93.3, there'll 
be two extra slots after 93.1.
Hope I clarified rather than confused.
--
Rick


----- Original Message ----- 
From: "Dennis Gibson" <wb6tnb@xxxxxxxxx>
To: <irca@xxxxxxxxxxxxxxxx>
Sent: Tuesday, March 11, 2014 2:20 PM
Subject: Re: [IRCA] Seattle's 1090 Now Using IBOC


Which AM HD radio do you have? I don't think there has ever been a portable 
AM HD. Those that I know of are component tuners that require amplification. 
There are car stereo radios with HD but I don't know if they receive AM HD.

I would like to see it die a very quick death.

Date: Tue, 11 Mar 2014 10:09:11 -0700
From: "Rick Lewis" <ricklew@xxxxxxxxxxxxxx>
To: "Mailing list for the International Radio Club of America"
   <irca@xxxxxxxxxxxxxxxx>
Subject: Re: [IRCA] Seattle's 1090 Now Using IBOC

Finally checked KFNQ out on the upstairs HD radio.
The HD decodes, but really, it sounds no better than their AM did before
they introduced IBOC noise to it.
Granted, it sounds much quieter than it does on analog, but only because of
the contrast from the hash now mixed with the analog signal.
How absurd!
--
Rick

Sent from my iPad
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