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How to power a vintage CB radio?

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jaspence

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Powera vintage CB

The picture suggests that the screw in the black lead was used to ground it to the car body and the red lead went to the positive connection, which should be directly to the battery or an empty spot in the fuse panel. If this has not been used recently, I would get a good quality variable power supply intended for use with 12 volt two way radios. Connect the radio according to the instructions, making sure the AC power is off, and start with the voltage turned to 0. Turn on the power supply and gradually bring the voltage up to about 13 volts. If you notice any noises or smoke, turn it off fast. If all goes well, hook up your antenna and you are good to go. Old radio have parts that may not age well, and a sudden surge of voltage can spell instant death.
 

LtDoc

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Very basically, the red wire goes to the (+) terminal, the black wire to the (-) terminal. The suggestion about starting at a lower voltage and going to the 'normal' voltage is a fairly good one! Things age, and that sometimes means that they won't work as expected or at all. Finding that out at a low voltage means less components may fail, meaning less repairs (maybe).
Have fun.
- 'Doc
 

Cruiseomatic

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Slow power up is a good idea, But First, take the cover off and visually check it. It may have an obvious short or corroded wire and powering it up could kill it beyond resurrection. I take the same approach with these type of radio's as I do old tube radios before I do a restore on them.
 

KBEX

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I have an old 80s CB I power with a micronta 12volt regulated power supply, check out the Pyramid PS3KX it's pretty reasonable at 17 to 20 bucks online.
 

TheCam

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Oct 19, 2011
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Ponoka, Alberta
Its 12 V, just attach it to a 12 V auto battery, nothing bad can happen, it is only 12 volt. Put a 2-5 amp fuse in, if it blows, put a 10 amp fuse in, if that blows, scrap the project for a 30 yr old CB radio.

Good Luck
 

Big_Ears

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Maybe check the reverse polarity diode where the power wires connect to the circuit board (if there is one). If is shorted, remove (or replace) before powering up.
 

keevel

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Dec 26, 2008
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Koko's Cigar Lounge
Anybody remember those "Booster" power supplies where you passed your antenna output through the power supply and while receiving the radio would be supplied with 12 volts and then when you hit the transmit key the voltage was raised to 15 or 16 volts to give max un amplified output?
 
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