04-10-2015, 02:17 PM
(04-10-2015, 08:14 AM)Chuck Schwark Wrote: I believe those electrolytic rectifiers used a boric acid solution(?) - nothing too exotic...
+1. I recall reading something about this about 100 years ago, back when I was just getting started in this hobby, in Jim Fred's Antique Radio Corner column in Elementary Electronics magazine. I do distinctly remember a boric acid solution being mentioned then; basically the same solution as used in the older Mershon, and later aluminum can, wet electrolytic capacitors. I have read the same thing elsewhere since then.
Now, regarding the car radio: If the model number ends with the letter P (I can't really tell in the photo, but it appears to), then it was made for police use. Which means Bill (exray) is right on the money.
![Icon_smile Icon_smile](https://philcoradio.com/phorum/images/smilies/icon_smile.gif)
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Ron Ramirez
Ferdinand IN