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-   -   AUX input jack for 67-72 AM radio (https://67-72chevytrucks.com/vboard/showthread.php?t=502427)

blkcorvair 01-08-2012 08:19 PM

AUX input jack for 67-72 AM radio
 
Here is my simple install of a Stereo type 1/8” input lack into my stock 67-72 AM Radio. This allows for the use of any low signal output to be played right through the radio without sacrificing the AM portion of the radio. Such devices like an MP3, Ipod, or portable CD player, or in my case my adroid phone with Pandora app. You won’t need any separate switch. The stereo jack used will give priority to any device plugged into it. And when the device is remove from the jack your AM radio will function as it normally would.
This is a pretty basic install and with a few basic tools and a careful approach nearly anyone should be able to do this for about $20 including the 3’ patch cable.

You’ll need to visit your local radio shack and obtain a pack of small resistors 1k or 2k ohms and an 1/8” Stereo Phone jack (Closed circuit) If you don’t have one already grab a 3’ or so patch cable. (This is a standard headphone type end)

Below is a diagram I found very useful that I found out on an antique radio forum. Basically you’ll need to remove the top cover of the radio and locate the blue wire from the volume potentiometer to the circuit board. You’ll be installing the input inline between the board and the pot in this circuit.

http://i174.photobucket.com/albums/w...t/SAM_3096.jpg

First I assembled and soldered my input jack. If you are installing the jack in a ground metal opening then there is no need for a ground wire and the #1 terminal need not be used. The two resistors get soldered together at the #5 and #2 Terminal and then one lead gets attached. The #3 and #4 terminal get “jumped” and than a second lead will be attached. For the leads I used some old thin speaker wire off an other radio I had.

http://i174.photobucket.com/albums/w...-09-58_158.jpg


I than removed the chrome face of the radio and located and drilled a 15/64 hole all the way to one side. (I wanted to be sure the AM dial needle would not hit my stereo jack inside the radio once completed) Be sure to carefully de-burr the inside and outside edges of the new hole.

http://i174.photobucket.com/albums/w...-34-47_614.jpg

The terminal lugs on the back of the stereo jack are very close to the edge and once installed could ground out on the inside edge of the faceplate. So I slightly bent the terminals inward with a needle nose pliers and put a few small scraps of heat shrink tubing in different spots. Im sure electrical tape would work fine too. I than carefully installed and tightened the stereo jack into the faceplate.

http://i174.photobucket.com/albums/w...-39-38_415.jpg

Once I fished the leads into the case and re-installed the faceplate I was ready to connect the leads.
I “de-soldered” the blue lead at the circuit board. The lead without the resistors was than soldered in its place. The lead with the resistors is than soldered to the blue lead going to the potentiometer.

And that’s it! I used a small wire tie to keep all the leads away from the dial and put the top cover back on. Check out the picture below of my Android playing music through my radio.

http://i174.photobucket.com/albums/w...-10-20_514.jpg

http://i174.photobucket.com/albums/w...-51-03_788.jpg

http://i174.photobucket.com/albums/w...-52-05_519.jpg

http://i174.photobucket.com/albums/w...-53-41_454.jpg

http://i174.photobucket.com/albums/w...-55-38_327.jpg

http://i174.photobucket.com/albums/w...t/SAM_3095.jpg

Just so everyone is aware. Im in no way any kind of electronics wiz. I used all this info that I found on the net and combined it to set up a 67-72 Delco AM radio as shown above. I plan to install this in my truck and don’t forsee it will damage anything but do this conversion at your own risk.

Below are a few links to other people who have posted thier "succesful" conversions and from where all my info has come from

http://www.antiqueradios.com/forums/...p?f=6&t=166720


http://www.spridgetguru.com/TA0041.html

http://autoxer.skiblack.com/nallm/mp3jackinamfm.htm

VA72C10 01-08-2012 08:55 PM

Re: AUX input jack for 67-72 AM radio
 
very cool! recommending for an FAQ!

oldblue1968chevy 01-09-2012 02:08 PM

Re: AUX input jack for 67-72 AM radio
 
awesome

GCncsuHD 01-09-2012 02:23 PM

Re: AUX input jack for 67-72 AM radio
 
Great job, I did a similar conversion on the stock BOSE radio in my 2003 GMC Duramax a few years ago using the same stereo jack.

blkcorvair 01-09-2012 03:19 PM

Re: AUX input jack for 67-72 AM radio
 
I forgot to mention. If you make the wires longer there is no reason you cant install the input jack somewhere on the dash or even in the glovebox out of site. (Just if it is not installed in grounded metal you must add a ground wire to the #1 terminal.)

cjohnson6772 01-10-2012 01:30 PM

Re: AUX input jack for 67-72 AM radio
 
Very very slick. I am now on the hunt for a stock AM radio and will be selling my ken harrison piece of junk!

kvn1011 01-22-2012 10:02 PM

Re: AUX input jack for 67-72 AM radio
 
Nice!
Posted via Mobile Device

camaney 02-05-2012 02:15 PM

Re: AUX input jack for 67-72 AM radio
 
great.. no i can do it my self

70 supersport 02-23-2012 12:28 AM

Re: AUX input jack for 67-72 AM radio
 
Does it work the same for a factory am/fm radios?
Posted via Mobile Device

70 supersport 02-23-2012 12:39 AM

Re: AUX input jack for 67-72 AM radio
 
Will it work the same for a am/fm radio?:chevy:
Posted via Mobile Device

blkcorvair 02-26-2012 09:20 AM

Re: AUX input jack for 67-72 AM radio
 
Quote:

Originally Posted by 70 supersport (Post 5206800)
Will it work the same for a am/fm radio?:chevy:
Posted via Mobile Device

I would think it would as they were mono as well. If you open the cover and it has three leads into the potentiometer I'd say your good to go. Ive only done this one, but Ive heard it relativly easy to do to a "stereo" radio as well. Never tried....Yet.

71meangreenc10 02-26-2012 06:35 PM

Re: AUX input jack for 67-72 AM radio
 
Do you only use "one" speaker with this mod or did you add something for multiple speakers?

Curious......

Smitty

oldgold70c10 02-26-2012 08:28 PM

Re: AUX input jack for 67-72 AM radio
 
Quote:

Originally Posted by 71meangreenc10 (Post 5214178)
Do you only use "one" speaker with this mod or did you add something for multiple speakers?

Curious......

Smitty

It uses the stock speaker and stock radio....just lets you connect an ipod, mp3 player, or cd player to the radio.

blkcorvair 02-27-2012 03:05 PM

Re: AUX input jack for 67-72 AM radio
 
Quote:

Originally Posted by oldgold70c10 (Post 5214396)
It uses the stock speaker and stock radio....just lets you connect an ipod, mp3 player, or cd player to the radio.

Thanks

chevy88 03-12-2012 07:29 PM

Re: AUX input jack for 67-72 AM radio
 
Will a 3 terminal 1/8" input jack work instead of a 5 terminal? Can't find a 5 terminal, and from my understanding you are just taking the left and right speaker side and putting them into one as you are just hooking up the one original speaker.

red71c10 03-12-2012 11:23 PM

Re: AUX input jack for 67-72 AM radio
 
Perfect! That is just what I want! To be able to keep the factory radio and have an easy way to run my iPod through it! I know I can do that! I'll have to buy a new speaker to go along with the input install!

Very Cool!!!
:metal:

tommyd241 03-13-2012 12:57 PM

Re: AUX input jack for 67-72 AM radio
 
Very cool!

chevy88 03-15-2012 03:30 AM

Re: AUX input jack for 67-72 AM radio
 
To save people looking up parts, here are the part #'s from radio shack.

The resistors in picture are 1k ohm 1/4 watt. part # 271-1321 package of 5 for $1.19

1/8" stereo panel mount phone jack with 5 terminals. part # 274-0246 for $2.69

Original replacement speaker 4" x 10" delco style special rectangular $49.95
Phone # US 1-877-780-2861 or outside US 1-763-780-2861 here is website http://www.turnswitch.com/speakers.htm

I jumped the gun and ordered 2k ohm resistors 1/2 watt before I knew what was exactly in the picture can some one tell me if this matters???

Normru45 03-21-2012 01:05 PM

Re: AUX input jack for 67-72 AM radio
 
very cool, just posted somthing kinda on the same page as this but i really like what you have done!

claytonisbob 05-07-2012 02:27 PM

Re: AUX input jack for 67-72 AM radio
 
This is too awesome! I am going to do this this weekend.

MistaGavin 05-07-2012 08:20 PM

Re: AUX input jack for 67-72 AM radio
 
This is very cool. I think I will do this as well.

Kidd-7 05-07-2012 09:18 PM

Re: AUX input jack for 67-72 AM radio
 
Quote:

Originally Posted by chevy88 (Post 5252848)

I jumped the gun and ordered 2k ohm resistors 1/2 watt before I knew what was exactly in the picture can some one tell me if this matters???

It will not matter, they may be a little larger. That rating only has to do with how much power before the smoke comes out of the resistor...

MistaGavin 05-07-2012 10:51 PM

Re: AUX input jack for 67-72 AM radio
 
Just got my parts for this upcoming small project. Resistors and 1/8 jack were a whopping $3.88

Bassetlounge 05-14-2012 11:53 PM

Re: AUX input jack for 67-72 AM radio
 
I am about to try this myself.. How have the others done implementing this? Anything to watch out for? I assume the radio still works if the aux jack is unplugged?
Posted via Mobile Device

BBrendal 05-15-2012 12:46 AM

Re: AUX input jack for 67-72 AM radio
 
Sweet!


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