Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks


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#479378 03/07/23 12:29 PM
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I have seen some posts on this subject and they have interested me. I would like to be able to charge my cell phone as well as be able to plug in a GPS unit in my 6 volt system. Does the following product description sound correct?

6V to 12V Step Up Converter, DROK DC 5V-11V to 12V Boost Converter Voltage Regulator Module 3A 36W Volt Transformer Power Supply for Car Stereo Radio Brand DROK
Power Source Corded Electric
Current Rating 3 Amps
Minimum Frequency 50 Hz
Item Weight 0.22 Pounds

Hawkeye #479386 03/07/23 03:31 PM
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My gps and phone’s charge fine on 6 volts.


Dens Chevys 1927 Speedster 1928 coupe 1941street rod 1947Fleetline 4 door 1949 1/2 ton Pickup (sold) 1954 210 4 door 1972 Monte Carlo 2003 Corvette convt..
dens41 #479388 03/07/23 05:01 PM
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According to Garmin, using less voltage than what the unit calls for could damage the unit.

Hawkeye #479389 03/07/23 05:30 PM
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Check what the power supply actually is supplying to your phone / GPS. Most USB chargers drop the voltage to 5v 2.5 amp or something like that. If yours does that then I see no reason that the charger could not drop 6 volt to the correct amount. Test it with a multi-meter and see if it works.


I have found that having an old car is a constant project that is never done. I think that is a good thing. Keeps me learning new things. Having two from different eras is just a form of higher education.
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I put a step-up in my 38 for my GPS. After reading all of the folks saying their GPS's work fine on 6v I tried it with my 53. No good. It didn't/doesn't like a 6v supply. It would work OK for a few minutes then cut to internal battery for a while then work OK on car voltage for a while. I was afraid I was going to ruin it so I put a step-up in the 53. I have since converted the 53 to 12v so it's no longer an issue. Personal opinion is put a step-up in your car for the peace of mind if nothing else and charge on.


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Tiny #479400 03/07/23 10:30 PM
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I have 6 v to 12 v converters in 2 of my cars to run 12 v radios, they work fine, I have not tried to run a phone or GPS with them. Both cars have an original type control head in the dash with cables that run to the firewall mounted radios so they appear stock.


Ed
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Tiny and Ed - what 6 volt to 12 volt unit did you buy? Is it similar to the product information below? Thanks

6V to 12V Step Up Converter, DROK DC 5V-11V to 12V Boost Converter Voltage Regulator Module 3A 36W Volt Transformer
Power Supply for Car Stereo Radio Brand DROK
Power Source Corded Electric
Current Rating 3 Amps
Minimum Frequency 50 Hz
Item Weight 0.22 Pounds

Hawkeye #479408 03/08/23 09:02 AM
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The two I bought for the 38 and 53 were on ebay and were hand made by a fellow in the USA. I can no longer find them on ebay so he may have died or stopped making them. I did find similar from other sellers on the web but they are now made in China. <CLICK> I don't remember the exact specs but they would handle about everything except a high power thump-thump stereo. Sorry I can't be more help.


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Hawkeye #479415 03/08/23 11:54 AM
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I don't remember the brand or the specifications and I am not at the cars right now. The one you show looks like it should work.


Ed
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I tested the voltage booster today with a 6 volt flashlight battery. I connected a voltage meter to the output end and the reading was just above 13 volts. I also tested it using the actual 6 volt car battery and got the same reading. Is 13+ volts too high for a GPS or phone charger?

Also, if I wanted to install an inline fuse holder that would attach to the Accessory Junction Block, what size glass fuse should I use? I don't think the cigarette lighter had a fuse.

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I would think 13 volts would be OK the voltage in a 12 volt car battery can test 13 volts fully charged
. Not sure about fuse size, I would start small and move up until it didn't blow in normal use.

Last edited by Ed_Osier; 03/14/23 10:32 PM.

Ed
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Most 12v systems the Alternator (and possibley generators) have an output of 13.8 to 14.2v and most equipment is built to handle this as a normal setting.
Tony


1938 1/2 ton Hope to drive it before I retire
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Most lead acid batteries have a voltage of 2.1-2.2 volts per cell and require a slightly higher voltage to charge them .


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