Re: Resurrecting my 56’ Patrician
Posted by humanpotatohybrid On 2022/3/26 19:31:04
We are here for the "dumb questions" after all. A lot of times easier than the actual hard questions. 
I assume you've already been looking through the service manuals as needed. They're a good start to have a clue of what's going on.
Quote:
As I hear, usually the vibrator in old car radios is usually what makes them go bad. Radios need DC voltage different than the battery DC voltage, but the only way to convert voltages is AC to AC. So the vibrator essentially produces a square wave from DC, which is fed to a transformer, after which it is rectified back to DC. The vibrator is an electromechanical mechanism and they do freeze/wear out over time. So that would be my first guess on that.
This is the power supply in your radio: the vibrator is "M1". You can see it powers a transformer "T1" which is connected to the rectifier "V7", which then powers part of the radio.
Yours uses this type:
The info is here:https://packardinfo.com/xoops/html/downloads/56ClipperRadio.pdf
You'll also want to check for obvious things like corrosion, and make sure the capacitors look okay. And if everything else checks out make sure the vacuum tubes light up of course.
P.S. I'm by Clarion or Pittsburgh PA.
I assume you've already been looking through the service manuals as needed. They're a good start to have a clue of what's going on.
Quote:
I haven’t seen vacuum tubes since the 70’s. No clue how to diagnosis. Decided to save that one for the spring.
As I hear, usually the vibrator in old car radios is usually what makes them go bad. Radios need DC voltage different than the battery DC voltage, but the only way to convert voltages is AC to AC. So the vibrator essentially produces a square wave from DC, which is fed to a transformer, after which it is rectified back to DC. The vibrator is an electromechanical mechanism and they do freeze/wear out over time. So that would be my first guess on that.
This is the power supply in your radio: the vibrator is "M1". You can see it powers a transformer "T1" which is connected to the rectifier "V7", which then powers part of the radio.
Yours uses this type:
The info is here:https://packardinfo.com/xoops/html/downloads/56ClipperRadio.pdf
You'll also want to check for obvious things like corrosion, and make sure the capacitors look okay. And if everything else checks out make sure the vacuum tubes light up of course.
P.S. I'm by Clarion or Pittsburgh PA.
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