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MOTOROLA PM400 Gets really hot.

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keymason

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Hey there, So I recently picked up a Moto pm400 from a pawn shop (he thought it was a CB radio) anyway I got it home ordered the ribless cable and CPS. have it powered by a car battery next to my computer while I program it. But this sucker gets really hot, Like burn you kind of hot. I'm not transmitting. Just have it plugged into the computer and programming it. The case says "Caution hot surface" so this might be normal? I have it at 130 Degrees f. Its hottest where the power cord enters the case but the entire bottom of the radio is over 100 degrees. Is this normal?

On a separate note it never stops "receiving" constant static and if you key up on the freq its set to it will light up the signal bar on the screen but no audio comes out just static. I think it might be broke.
 

MTS2000des

5B2_BEE00 Czar
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Jul 12, 2008
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Cobb County, GA Stadium Crime Zone
sounds like a baked PA. If the radio is not keyed up, it shouldn't be overheating. Some heat (around 85-95) is normal while on, but if it's boiling like it's keying up and it's not, the PA may be shorted and thus, drawing current. Normal standby current for that radio shouldn't be more than 1/2 to 3/4 amp with no audio. If it's more than that, something is wrong electrically. A current limiting power supply with a meter is your friend.
 
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