AM radio conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**richard2717** · 05-26-2023, 04:18 PM

I picked up a load of parts today and what I thought was a standard original AM radio in really nice shape is actually one that has been converted with an aux. port in the back. I am trying to find info on it to know what ohm speaker it would require with the conversion done. It has a label of who did it on the back but the website no longer exists and I have come up empty handed in my searches. Not being able to hear nixes calling the number as well. I want to test the radio before I go thru the trouble of putting it in the suburban I am putting together, but don't want to fry anything using the wrong speaker. Does anyone know anything about this particular conversion?

Thanks
Richard

.

**Boog** · 05-26-2023, 04:37 PM

I can't answer your questions but regarding AM radios, I heard just this week the auto makers will discontinue AM radios soon. My guess is there are fewer and fewer AM broadcasters out there. I haven't listened to AM stations in over 50 years.

**richard2717** · 05-26-2023, 04:43 PM

I have not listened to ANY stations in over 10 now. At least I got to hear the good music from the 50-90's

**HO455** · 05-26-2023, 05:06 PM

I would remove the top cover and look to see if you can ID the new modules. Maybe someone like Aurora Design. You can go to Aurora's website to see what their modules look like. You could also try talking to them and ask if the company on the sticker was a customer of theirs.

With the aftermarket modules then 8 ohm would be a safe guess.

**richard2717** · 05-26-2023, 05:38 PM

Quote:

Originally Posted by HO455

I would remove the top cover and look to see if you can ID the new modules. Maybe someone like Aurora Design. You can go to Aurora's website to see what their modules look like. You could also try talking to them and ask if the company on the sticker was a customer of theirs.

With the aftermarket modules then 8 ohm would be a safe guess.

Thanks for the idea. It definitely has an electronic board in it so maybe that will work.

**dmjlambert** · 05-27-2023, 07:24 PM

May be worth trying a couple of their other numbers and see if anybody is still answering. Here's an old snapshot of their website contact page.
https://web.archive.org/web/20161109...t/contact.html
I don't think filling out the form on the archived page would result in anything, but the numbers and email address are listed on that page. Their web page said "Old guys working on old radios."

**Richard** · 05-28-2023, 12:53 AM

Stock radio used a single 10 ohm speaker. Using an 8-10 ohm speaker/speakers for testing will not hurt anything, even if output will handle 4 ohms. Volume will just not go as loud with the higher load speaker. If there is more than one speaker connection the output section has been changed and would bet it will handle 4 ohm speakers. The Aux input implies the preamp section has been changed. Any newer replacement/upgrade boards would be designed for automotive speakers which are commonly 4 ohms for many years now. Looking at the board is a good idea, would bet board is labeled where output wires connect to it. Would help with connections.

toms68cst · 05-28-2023, 08:23 AM

An aux input would be connected to an output from an older iIhone or the like. (or bluetooth adapter) It would play through the speaker connected to the radio.

**richard2717** · 05-28-2023, 08:24 AM

Quote:

Originally Posted by dmjlambert

May be worth trying a couple of their other numbers and see if anybody is still answering. Here's an old snapshot of their website contact page.
https://web.archive.org/web/20161109...t/contact.html
I don't think filling out the form on the archived page would result in anything, but the numbers and email address are listed on that page. Their web page said "Old guys working on old radios."

Thanks I sent an email to that address. It did not bounce back so maybe someone still looks at it.

Quote:

Originally Posted by Richard

Stock radio used a single 10 ohm speaker. Using an 8-10 ohm speaker/speakers for testing will not hurt anything, even if output will handle 4 ohms. Volume will just not go as loud with the higher load speaker. If there is more than one speaker connection the output section has been changed and would bet it will handle 4 ohm speakers. The Aux input implies the preamp section has been changed. Any newer replacement/upgrade boards would be designed for automotive speakers which are commonly 4 ohms for many years now. Looking at the board is a good idea, would bet board is labeled where output wires connect to it. Would help with connections.

I am going to pull the top cover off today and see what I can see. Thanks for that bit of info as well.

05-26-2023, 04:18 PM	#1
richard2717 Equal opportunity joke ofender Join Date: Oct 2011 Location: Eastern Shore of MD Posts: 9,885	AM radio conversion I picked up a load of parts today and what I thought was a standard original AM radio in really nice shape is actually one that has been converted with an aux. port in the back. I am trying to find info on it to know what ohm speaker it would require with the conversion done. It has a label of who did it on the back but the website no longer exists and I have come up empty handed in my searches. Not being able to hear nixes calling the number as well. I want to test the radio before I go thru the trouble of putting it in the suburban I am putting together, but don't want to fry anything using the wrong speaker. Does anyone know anything about this particular conversion? Thanks Richard . Attached Images __________________ Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type.

05-26-2023, 04:37 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	Re: AM radio conversion I can't answer your questions but regarding AM radios, I heard just this week the auto makers will discontinue AM radios soon. My guess is there are fewer and fewer AM broadcasters out there. I haven't listened to AM stations in over 50 years. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

05-26-2023, 04:43 PM	#3
richard2717 Equal opportunity joke ofender Join Date: Oct 2011 Location: Eastern Shore of MD Posts: 9,885	Re: AM radio conversion I have not listened to ANY stations in over 10 now. At least I got to hear the good music from the 50-90's __________________ Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type.

05-26-2023, 05:06 PM	#4
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,804	Re: AM radio conversion I would remove the top cover and look to see if you can ID the new modules. Maybe someone like Aurora Design. You can go to Aurora's website to see what their modules look like. You could also try talking to them and ask if the company on the sticker was a customer of theirs. With the aftermarket modules then 8 ohm would be a safe guess. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

05-27-2023, 07:24 PM	#6
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,563	Re: AM radio conversion May be worth trying a couple of their other numbers and see if anybody is still answering. Here's an old snapshot of their website contact page. https://web.archive.org/web/20161109...t/contact.html I don't think filling out the form on the archived page would result in anything, but the numbers and email address are listed on that page. Their web page said "Old guys working on old radios."

05-28-2023, 12:53 AM	#7
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,697	Re: AM radio conversion Stock radio used a single 10 ohm speaker. Using an 8-10 ohm speaker/speakers for testing will not hurt anything, even if output will handle 4 ohms. Volume will just not go as loud with the higher load speaker. If there is more than one speaker connection the output section has been changed and would bet it will handle 4 ohm speakers. The Aux input implies the preamp section has been changed. Any newer replacement/upgrade boards would be designed for automotive speakers which are commonly 4 ohms for many years now. Looking at the board is a good idea, would bet board is labeled where output wires connect to it. Would help with connections. __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746

05-28-2023, 08:23 AM	#8
toms68cst Registered User Join Date: Jun 2000 Location: Bismarck, ND Posts: 4,274	Re: AM radio conversion An aux input would be connected to an output from an older iIhone or the like. (or bluetooth adapter) It would play through the speaker connected to the radio. __________________ Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.