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Newer GM car stereos for DX

O

OKCRadioGuy

Has anyone tried to use a modern GM car stereo (I have a 2005 Chevy Siverado with the "Bose" cd changer) for DXing off a 12volt supply seperated from the car? As selective as mine is in the truck I'd like to have a duplicate at home to DX with. Are there any known pitfalls to doing this such as their serial data needing to talk back to the mothership to make it work or theft lock issues if I went and bought one at a salvage lot?

Thanks!
 
You'd need to add some filtering for the average 12v supply to not hear hum.
I use a car battery well past its prime and have it on charger set to run 2-3 AM.
I hear NO hum ever, unless it's on the real air signal.

Car radios on batteries are the best cheap on-air monitors possible, they are super-shielded, and it's easy to attentuate the input.
DC power isolated from the AC line is pure magic.
This is very helpful in use as an air-monitor where the local xmit RF gets into AC wiring , and the incoming rf bypassing is not perfect.
In such a case you get hum modulation on the air-monitor that's not really on the actual air signal.
This is why stations spend so much for monitors, among other things , to make sure the ONLY signal to the detector
came properly through a tuned circuit, not leaked in through the power supply.

I can't guess what happens when an On-star serail code is declared junked by the system. ???
I'll bet they've never closed that part of the loop, and unless reported stolen (maybe a problem) it should work.
Do these things have two antennas? You'd think so. Maybe just don't connect the high-freq data antenna....?

How's that sound on the AM for DX?
 
"How's that sound on the AM for DX?" They are acceptable AM radios. I've heard nicer sounding AM radios but the quality is acceptable. The FM is stellar, espcially for DX. The nice thing about DX'ing FM is there's actually something sometimes out there that's worth listening to. Personally I find AM programming these days to be nothing short of a wasteland of speech. With the exception of KCJJ on 1630 I can't imagine there is ever a reason to regularly check the AM band. It might be cool strictly from a technical standpoint, but then again AM DX'ing is pretty easy in a lot of ways... a lot easier than FM.
 
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