Most older car radios are listed under United Motors. Didn't see that exact model number:
http://www.nostalgiaair.org/Resources/429/T0000429.htm
Six volt car radios draw a lot of current. If you don't have a 6 volt car battery need a power supply that can supply near 10 amps. Can drop a 12 volt battery down to 6 volts but there will be wasted power/heat.
Norm
:Hi: I'm attempting to repair a car radio for a friend. It is from a 1941 Chevy Master Deluxe. The radio model #is 985697. Anyone have or know where I can get a schematic for this radio. I am also not familar with 6 volt radios. What could I use as a power supply to test this radio? Thanks for any help you can provide. Al
:
Re: 6 volt radio, my '49 Chev radio could kill a battery in 20 minutes. Then you got to walk home in the dark. :>)
Here's an old trick - A 12 volt car battery is six 2 volt cells joined together with lead coupling bars. If you drill into the center a couple of inches from the edge, the edge opposite to the edge with the battery poles, you will hit the coupling bar with a bit of luck. Drive in a screw and that will give you 6 volts, either + or -, depending on which battery pole you choose. If you run one side down, move your wires to the other side.
:Hi
:
: Most older car radios are listed under United Motors. Didn't see that exact model number:
:
:http://www.nostalgiaair.org/Resources/429/T0000429.htm
:
: Six volt car radios draw a lot of current. If you don't have a 6 volt car battery need a power supply that can supply near 10 amps. Can drop a 12 volt battery down to 6 volts but there will be wasted power/heat.
:
:Norm
:
::Hi: I'm attempting to repair a car radio for a friend. It is from a 1941 Chevy Master Deluxe. The radio model #is 985697. Anyone have or know where I can get a schematic for this radio. I am also not familar with 6 volt radios. What could I use as a power supply to test this radio? Thanks for any help you can provide. Al
::
:
:
Hi:
:
: Most older car radios are listed under United Motors. Didn't see that exact model number:
:
:http://www.nostalgiaair.org/Resources/429/T0000429.htm
:
: Six volt car radios draw a lot of current. If you don't have a 6 volt car battery need a power supply that can supply near 10 amps. Can drop a 12 volt battery down to 6 volts but there will be wasted power/heat.
:
:Norm
:
::Hi: I'm attempting to repair a car radio for a friend. It is from a 1941 Chevy Master Deluxe. The radio model #is 985697. Anyone have or know where I can get a schematic for this radio. I am also not familar with 6 volt radios. What could I use as a power supply to test this radio? Thanks for any help you can provide. Al
::
:
:
::Hi: I'm attempting to repair a car radio for a friend. It is from a 1941 Chevy Master Deluxe. The radio model #is 985697. Anyone have or know where I can get a schematic for this radio. I am also not familar with 6 volt radios. What could I use as a power supply to test this radio? Thanks for any help you can provide. Al
::
:Al,
:You can download the service info here:
:http://chevy.oldcarmanualproject.com/radios/pdf/6D835ums.pdf
:Carl T
:
Peter:
I wonder if you could run a car radio by placing 12 Volts 60 Hz. AC on the primary of the power transformer? I seems that the vibrator switches 6 Volts across the two halves of the primary winding at a low frequency rate, so maybe the transformer would not know the difference with 12 Volts applied to the whole winding????
I have an old 6V radio in the basement, I think I will try that. My isolation transformer is two 6V 20A filament transformers wired back to back, if I series the secondaries I can get 12 Volts at 20 Amps, or maybe use the 6 Volt connection between the transformers and connect to one half of the radios power transformer. Read the B+ as I turn it up with a VARIAC. Huh, Huh?
Lewis
:
You can operate a 6 volt car radio off of 6 volts AC but there are catches. The radio has to use a 4 pin vibrator (3 pin for 12 volt radios), not more. Radios with more vibrator pins do not have rectifier tubes.
Also a vibrator operates closer to 115 cycles. Sixty cycles will cause more heating of the transformer. You can actually remove the vibrator and jump a couple pins since input voiltage is already AC.
Due to lower frequency and more heating best to operate the radio off of lower voltage. Try 5 or 5.5 volts.
Car radios are generally very good as most have RF stages.
Norm
::Here's a low cost lead-acid 6-Volt 10AH ($10) battery.
::You can probably buy a low cost trickle or float charger at the same time.
::http://www.ecomelectronics.com/prodinfo.phtml?id=3301519&ref=froogle
:
:Peter:
:I wonder if you could run a car radio by placing 12 Volts 60 Hz. AC on the primary of the power transformer? I seems that the vibrator switches 6 Volts across the two halves of the primary winding at a low frequency rate, so maybe the transformer would not know the difference with 12 Volts applied to the whole winding????
:
:I have an old 6V radio in the basement, I think I will try that. My isolation transformer is two 6V 20A filament transformers wired back to back, if I series the secondaries I can get 12 Volts at 20 Amps, or maybe use the 6 Volt connection between the transformers and connect to one half of the radios power transformer. Read the B+ as I turn it up with a VARIAC. Huh, Huh?
:Lewis
::
:
:
Norm:
Yea, you couldn't have a rectifing vibrator, but you might could jumper in a couple of diodes while you have the vibrator out. Hadn't thought of 115 Hz., tho. Most of my work was between 400 and 60 Hz., where ignorance could (and has) spelled disaster. OK, 5.5 Volts and watch the transformer. My radio is from a 1947 Ford, has PP 6V6s, so it must use a lot of 6V to operate. I'll keep you posted, if I it doesn't do something really embarrasing.
Lewis
Lewis
:::Lewis
::: You can operate a 6 volt car radio off of 6 volts AC but there are catches. The radio has to use a 4 pin vibrator (3 pin for 12 volt radios), not more. Radios with more vibrator pins do not have rectifier tubes.
:::
::: Also a vibrator operates closer to 115 cycles. Sixty cycles will cause more heating of the transformer. You can actually remove the vibrator and jump a couple pins since input voiltage is already AC.
:::
::: Due to lower frequency and more heating best to operate the radio off of lower voltage. Try 5 or 5.5 volts.
:::
::: Car radios are generally very good as most have RF stages.
:::
:::Norm
:
:Norm:
:Yea, you couldn't have a rectifing vibrator, but you might could jumper in a couple of diodes while you have the vibrator out. Hadn't thought of 115 Hz., tho. Most of my work was between 400 and 60 Hz., where ignorance could (and has) spelled disaster. OK, 5.5 Volts and watch the transformer. My radio is from a 1947 Ford, has PP 6V6s, so it must use a lot of 6V to operate. I'll keep you posted, if I it doesn't do something really embarrasing.
:Lewis
:Lewis
:
Norm
:I saw somewhere on the net a picture of a console radio with a car radio chassis factory installed, probably wartime, so it would be a 6 volt radio. The curious thing is there is no sign of an external power supply. Maybe it used a curtain-burner power cord, but the supply would be AC for sure.
:
:
::::Lewis
:
:::: You can operate a 6 volt car radio off of 6 volts AC but there are catches. The radio has to use a 4 pin vibrator (3 pin for 12 volt radios), not more. Radios with more vibrator pins do not have rectifier tubes.
::::
:::: Also a vibrator operates closer to 115 cycles. Sixty cycles will cause more heating of the transformer. You can actually remove the vibrator and jump a couple pins since input voiltage is already AC.
::::
:::: Due to lower frequency and more heating best to operate the radio off of lower voltage. Try 5 or 5.5 volts.
::::
:::: Car radios are generally very good as most have RF stages.
::::
::::Norm
::
::Norm:
::Yea, you couldn't have a rectifing vibrator, but you might could jumper in a couple of diodes while you have the vibrator out. Hadn't thought of 115 Hz., tho. Most of my work was between 400 and 60 Hz., where ignorance could (and has) spelled disaster. OK, 5.5 Volts and watch the transformer. My radio is from a 1947 Ford, has PP 6V6s, so it must use a lot of 6V to operate. I'll keep you posted, if I it doesn't do something really embarrasing.
::Lewis
::Lewis
::
:
: