10-27-2019, 08:31 PM
Back to work on this radio. Finally.
I installed replacements for the R18-R19 candohm resistor a few evenings ago.
Much of today was spent rebuilding the electrolytic cans. One of the two, C39 (10 uF) had been replaced with a Solar cap with positive and negative terminals under the chassis molded into what appears to be Bakelite. It is a very hard substance. More on that shortly.
Here's the Solar can, cut open:
Now that Bakelite (?) base. I found that the inside end of the terminals were aluminum, not steel or copper. Naturally. So the only way this could be rebuilt (without aluminum solder, that is) would be to drill two holes through the Bakelite.
A regular drill bit barely put a dent in the stuff. I have a few concrete bits, so I selected the smallest one I have, chucked it in my battery operated Ryobi drill, set it for hammer drill operation, and easily drilled the two holes I needed.
I then added a new 10 uF Solen Fast capacitor.
Finally, the parts of the can were put back together.
I installed replacements for the R18-R19 candohm resistor a few evenings ago.
Much of today was spent rebuilding the electrolytic cans. One of the two, C39 (10 uF) had been replaced with a Solar cap with positive and negative terminals under the chassis molded into what appears to be Bakelite. It is a very hard substance. More on that shortly.
Here's the Solar can, cut open:
Now that Bakelite (?) base. I found that the inside end of the terminals were aluminum, not steel or copper. Naturally. So the only way this could be rebuilt (without aluminum solder, that is) would be to drill two holes through the Bakelite.
A regular drill bit barely put a dent in the stuff. I have a few concrete bits, so I selected the smallest one I have, chucked it in my battery operated Ryobi drill, set it for hammer drill operation, and easily drilled the two holes I needed.
I then added a new 10 uF Solen Fast capacitor.
Finally, the parts of the can were put back together.
--
Ron Ramirez
Ferdinand IN
