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Old 11-03-2017, 05:33 PM   #1
Hugger 71
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Original AM radio with FM and Aux input

I just bought a nice 1971 Cheyenne after years of looking for the right truck. It has what appears to be an original radio. This radio has apparently been rebuilt with FM capabilities and an aux input. When I turn the radio on I get stereo FM. I cannot figure out how to switch to AM or the auxiliary input. Anyone know about these?
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Old 11-03-2017, 05:49 PM   #2
Jcfcamaro
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Re: Original AM radio with FM and Aux input

The FM/AM selector should slide left to right.
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Old 11-03-2017, 06:25 PM   #3
Hugger 71
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Re: Original AM radio with FM and Aux input

I am trying to attach photos. The aux cord is in the glove box.
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Old 11-03-2017, 06:30 PM   #4
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Re: Original AM radio with FM and Aux input

If you are getting FM stations out of that radio, someone has been inside the radio and done a conversion, of some sort. Aux use and AM use are dependent upon the conversion done and there are too many alternatives for me to definitively help. Bruce
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Old 11-03-2017, 06:38 PM   #5
Hugger 71
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Re: Original AM radio with FM and Aux input

Yes it has been converted. I know it probably has something to do with the preset buttons but they don't seem to change the radio off of FM. They seem to just be presets. I was just hoping someone had some knowledge of how these things work. I have seen a few companies that convert radios but I haven't been able to get any info. Thanks for replying
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Old 11-03-2017, 06:40 PM   #6
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Re: Original AM radio with FM and Aux input

try the tone knob behind the volume knob
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Old 11-03-2017, 06:42 PM   #7
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Re: Original AM radio with FM and Aux input

Did you try cycling it on and off quickly? Mine is able to change functions that way.

I have one in my 69 Z/28 that was converted by Greg at S&M Electro-Tech, Inc. Link Below
http://www.turnswitch.com/
The instructions are on his website.
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Old 11-03-2017, 07:42 PM   #8
Jcfcamaro
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Re: Original AM radio with FM and Aux input

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Originally Posted by ajviper View Post
Did you try cycling it on and off quickly? Mine is able to change functions that way.

I have one in my 69 Z/28 that was converted by Greg at S&M Electro-Tech, Inc. Link Below
http://www.turnswitch.com/
The instructions are on his website.
I watched a video on this. Cycle the power on and off real quick.
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Old 11-03-2017, 09:40 PM   #9
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Re: Original AM radio with FM and Aux input

On some of those conversions, when you plug your devise into the aux input, it automatically overrides the FM signal. No button to push, just plug it in.
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Old 11-04-2017, 12:18 AM   #10
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Re: Original AM radio with FM and Aux input

Mine you turn on off quickly also
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Old 11-04-2017, 12:35 AM   #11
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Re: Original AM radio with FM and Aux input

Who's doing this to the radio's? I'd like to up grade my AM/FM
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Old 11-04-2017, 04:27 AM   #12
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Re: Original AM radio with FM and Aux input

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Originally Posted by Jcfcamaro View Post
Who's doing this to the radio's? I'd like to up grade my AM/FM
A guy named Gary Tayman did mine, google him, he’s in Florida, mail him your radio and he transforms it to fm and Bluetooth
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cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394
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Old 11-04-2017, 10:49 AM   #13
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Re: Original AM radio with FM and Aux input

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Originally Posted by hdff View Post
A guy named Gary Tayman did mine, google him, he’s in Florida, mail him your radio and he transforms it to fm and Bluetooth
I've had Gary Tayman do 4 for me so far, very satisfied and have another I need to send him
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Old 11-04-2017, 09:27 PM   #14
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Re: Original AM radio with FM and Aux input

What’s he charging to do the conversion, anyone know? I would like to have the Bluetooth and audio line in as well.

Last edited by b.sharp; 11-04-2017 at 09:32 PM.
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Old 11-04-2017, 09:48 PM   #15
PAWS 72
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Re: Original AM radio with FM and Aux input

I've done the aux conversion several years ago. I guess it still works.
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Old 11-05-2017, 09:25 AM   #16
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Re: Original AM radio with FM and Aux input

That FM chip comes from Aurora designs.

I have not seen their products sold to the DIY crowd.
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