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  • Electrical: Radio: conversion to 12v

    Did a search but couldn't find much. Has anyone used a step up converter to use a modern radio on there 6v neg ground?

  • #2
    Your car is supposed to be six volt, POSITIVE ground. That's the way the factory built it.

    There is only one GOOD 6 to 12 volt converter available, and that one is only available to Aurora dealers.

    https://www.tech-retro.com/aurora-de...eet%201.2b.pdf


    The little silver cube converter has very limited power, but can be installed by amateur mechanics.

    There is one on eBay that looks good at first glance, but it will not reverse polarity.

    Last edited by RadioRoy; 09-22-2020, 01:01 PM.
    RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

    17A-S2 - 50 Commander convertible
    10G-C1 - 51 Champion starlight coupe
    10G-Q4 - 51 Champion business coupe
    4H-K5 - 53 Commander starliner hardtop
    5H-D5 - 54 Commander Conestoga wagon
    56B-D4 - 56 Commander station wagon
    60V-L6 - 60 Lark convertible

    Comment


    • #3
      Many years ago, I put a cassette player in a '54 Champion that was my daily driver, and I built an inverter that used a 1:1 turns ratio transformer, and a pair of power transistors. Basically, it stacked the input 6 volts with the output 6 volts, and put out 12 volts, positive ground. I simply isolated the cassette player from the body. Best of all, the inverter only ran if it saw a load. Quiescent, its draw was trivial. It worked just fine.

      But I don't remember how it was wired. I do remember I just sort of fluked into it.
      Gord Richmond, within Weasel range of the Alberta Badlands

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      • #4
        This inverter will handle 8A

        Click image for larger version

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        https://www.amazon.com/dp/B07CKMG22C...v_ov_lig_dp_it

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        • #5
          Years ago, I installed an invertor/convertor in my 1953 Commander Starliner to operate a 5 Watt CB radio. I mounted it up behind the dash and it worked fine.
          Gary L.
          Wappinger, NY

          SDC member since 1968
          Studebaker enthusiast much longer

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          • #6
            Originally posted by Matt N View Post
            Good work! Are you going to try one? I wonder if it will switch polarity also. It almost looks like it will, but cannot be sure. For that price, it's worth a gamble.
            RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

            17A-S2 - 50 Commander convertible
            10G-C1 - 51 Champion starlight coupe
            10G-Q4 - 51 Champion business coupe
            4H-K5 - 53 Commander starliner hardtop
            5H-D5 - 54 Commander Conestoga wagon
            56B-D4 - 56 Commander station wagon
            60V-L6 - 60 Lark convertible

            Comment


            • #7
              I put a modern radio in my 1954 3R6 pickup (6 volt, positive ground) and used this. It converts both the voltage and the polarity, if needed. Works well. Interestingly, it is made in New Zealand.

              https://www.vintageautogarage.com/6-...V-p/ce412v.htm
              Skip Lackie

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              • #8
                Originally posted by RadioRoy View Post

                Good work! Are you going to try one? I wonder if it will switch polarity also. It almost looks like it will, but cannot be sure. For that price, it's worth a gamble.
                No it doesn't switch polarity, but I believe if isolated the ground on the device (car stereo) you want to power you won't need it.
                Last edited by Matt N; 09-23-2020, 08:51 AM.

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                • #9
                  Originally posted by Matt N View Post

                  No it doesn't switch polarity, but I believe if isolated the ground on the device (car stereo) you want to power.
                  Yes, you can do that. Be sure to cut the shielding from the antenna wire somewhere near the radio.
                  RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

                  17A-S2 - 50 Commander convertible
                  10G-C1 - 51 Champion starlight coupe
                  10G-Q4 - 51 Champion business coupe
                  4H-K5 - 53 Commander starliner hardtop
                  5H-D5 - 54 Commander Conestoga wagon
                  56B-D4 - 56 Commander station wagon
                  60V-L6 - 60 Lark convertible

                  Comment


                  • #10
                    ​​​​Success
                    Click image for larger version

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                    I used two inverters (one for main power, and one for memory).
                    Click image for larger version

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                    I tied the out put grounds together
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                    I haven't installed it yet, haven't sorted it all out yet?


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                    • #11
                      The memory power will drain the battery if the car is not driven at least once a week. Maybe even more often since the car is 6 volts.

                      I hope you don't chop up the dashboard for that butt ugly radio.
                      RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

                      17A-S2 - 50 Commander convertible
                      10G-C1 - 51 Champion starlight coupe
                      10G-Q4 - 51 Champion business coupe
                      4H-K5 - 53 Commander starliner hardtop
                      5H-D5 - 54 Commander Conestoga wagon
                      56B-D4 - 56 Commander station wagon
                      60V-L6 - 60 Lark convertible

                      Comment


                      • #12
                        Originally posted by RadioRoy View Post
                        I hope you don't chop up the dashboard for that butt ugly radio.
                        Haha, that's just a cheap radio I had lying around in the garage. I wanted to test things before I invested too much. I won't cut anything for the installation, I might try this one first, it has Bluetooth.

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