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#1 |
Registered User
![]() Join Date: May 2011
Location: Long Island NY
Posts: 787
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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. ![]() 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. ![]() 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. ![]() 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. ![]() 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. ![]() ![]() ![]() ![]() ![]() ![]() 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 |
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#2 |
VA72C10
![]() Join Date: Mar 2008
Location: Midlothian, VA
Posts: 25,269
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Re: AUX input jack for 67-72 AM radio
very cool! recommending for an FAQ!
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Looking for a 67-72 swb or blazer project in or around VA. ![]() |
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#3 |
Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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Re: AUX input jack for 67-72 AM radio
awesome
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John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
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#4 |
Charlie Daniels w/ a Tq Wrench
Join Date: May 2009
Location: Statesville, NC
Posts: 1,570
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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.
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ΜΟΛΩΝ ΛΑΒΕ 67 C10 Shortbed "Great Grandpa's Truck" I6 3 on the Tree 71k original miles 5.3 swap in the works69 K5 Blazer-Family Beach Cruiser Project 78 K30 Dually Semi-Retired Fire Truck 350/SM465 35"s SOLD01 2500HD ECSB 6.0 4x4 5.13's 8" lift 38"s |
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#5 |
Registered User
![]() Join Date: May 2011
Location: Long Island NY
Posts: 787
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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.)
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#6 |
Registered User
Join Date: Dec 2010
Location: NC
Posts: 666
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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!
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#7 |
Kvn1011
Join Date: May 2009
Location: kankakee il
Posts: 560
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Re: AUX input jack for 67-72 AM radio
Nice!
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#8 |
Registered User
Join Date: Feb 2008
Location: sacramento california
Posts: 204
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Re: AUX input jack for 67-72 AM radio
great.. no i can do it my self
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#9 |
Registered User
Join Date: Nov 2009
Location: farmington nm
Posts: 15
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Re: AUX input jack for 67-72 AM radio
Does it work the same for a factory am/fm radios?
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#10 |
Registered User
Join Date: Nov 2009
Location: farmington nm
Posts: 15
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Re: AUX input jack for 67-72 AM radio
Will it work the same for a am/fm radio?
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#11 |
Registered User
![]() Join Date: May 2011
Location: Long Island NY
Posts: 787
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Re: AUX input jack for 67-72 AM radio
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.
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#12 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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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
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#13 |
Who's got steelies?
![]() Join Date: Feb 2006
Location: Morrison, Oklahoma
Posts: 1,026
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Re: AUX input jack for 67-72 AM radio
It uses the stock speaker and stock radio....just lets you connect an ipod, mp3 player, or cd player to the radio.
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#14 |
Registered User
![]() Join Date: May 2011
Location: Long Island NY
Posts: 787
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Re: AUX input jack for 67-72 AM radio
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#15 |
Registered User
Join Date: May 2007
Location: Southern, Saskatchewan
Posts: 640
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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.
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Kerry My build thread. http://67-72chevytrucks.com/vboard/s....php?p=3657823 1971 Chev SWB with 68 nose, 6.2 diesel th350, and 3.73 rear gears 1988 Chev Extendacab 2010 Honda VT1300CS Sabre 2005 Buick Rendezvous wife's ride |
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#16 |
The Red Menace
Join Date: Feb 2009
Location: Roseburg, OR
Posts: 577
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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!!! ![]()
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1971 Custom 10 - 350/350TH - Pwr steering, gauges, Chrome front bumper, Chrome hubcaps, Door edge guards, HD rear springs (current) 1968 C-20 Custom Camper - 350/350TH (orig 327), Pwr steering & brakes, gauges w/tach (former) 1968 C-20 - 307/3sp column (Dad's when I was a kid) "Driving is like coloring. Things get messy if you can't stay inside the lines." |
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#17 |
Registered User
Join Date: May 2008
Location: 505
Posts: 447
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Re: AUX input jack for 67-72 AM radio
Very cool!
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'68 SWB Fleetside '98 K1500 Silverado |
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#18 |
Registered User
Join Date: May 2007
Location: Southern, Saskatchewan
Posts: 640
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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???
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Kerry My build thread. http://67-72chevytrucks.com/vboard/s....php?p=3657823 1971 Chev SWB with 68 nose, 6.2 diesel th350, and 3.73 rear gears 1988 Chev Extendacab 2010 Honda VT1300CS Sabre 2005 Buick Rendezvous wife's ride Last edited by chevy88; 03-15-2012 at 03:58 AM. |
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#19 |
Registered User
Join Date: Feb 2012
Location: wilton nh
Posts: 35
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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!
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#20 |
Registered User
Join Date: Dec 2010
Location: Dallas, TX
Posts: 32
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Re: AUX input jack for 67-72 AM radio
This is too awesome! I am going to do this this weekend.
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#21 |
Registered User
Join Date: Nov 2010
Location: Fairbanks Alaska
Posts: 126
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Re: AUX input jack for 67-72 AM radio
This is very cool. I think I will do this as well.
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You're not old, it IS loud! 1970 CST-10 BB 400 ![]() |
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#22 |
Registered User
Join Date: Aug 2010
Location: RTP, NC
Posts: 518
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Re: AUX input jack for 67-72 AM radio
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...
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![]() ![]() 71 C-10 - 307 - 3 on tree 01 Ford Explorer 5.0 v8 96 Mercury Cougar v8 79 Trans Am 403 Olds |
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#23 |
Registered User
Join Date: Nov 2010
Location: Fairbanks Alaska
Posts: 126
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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
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You're not old, it IS loud! 1970 CST-10 BB 400 ![]() |
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#24 |
Registered User
Join Date: Apr 2012
Location: des moines ia
Posts: 28
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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?
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#25 |
Recalculating.....
Join Date: Nov 2010
Location: New Lenox Il
Posts: 686
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Re: AUX input jack for 67-72 AM radio
Sweet!
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Brian - (BBrendal) 1969 Chevy Camaro Z28 1972 Chevy Blazer CST 2004 GMC Yukon (The truck that pulls the car trailer) 1972 Chevy Blazer CST #2 (Finished and sold!) Blazer build link... http://s1213.photobucket.com/albums/...rendal/Blazer/ |
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