07-14-2017, 07:20 AM
I received the new dial, from Radio Daze, this week. The quality looks great! Good color match and translucency. I am really satisfied with it. I have not mounted it yet, but looking at the rivets, it looks like an 1/8" pop rivet is just a little too large in diameter. A #4-40 screw looks about right. I won't be mounting it until after finishing up the chassis work.
Speaking of the chassis, it is very dirty/dusty, no rust, but almost black. I usually do not do more than dust removal. (After all it is over 80 years old! And should look like it.) But in this case I think I would like to clean it up a little better. It seems as if I have read, somewhere, about using a bathroom cleaner, like Scrubbing Bubbles, for cleaning up the chassis. Any comments on using something like this, or anything else? I have not decided yet about removing the coil cans to clean them up. I know that Simple Green and the ultrasonic cleaner did a great job on the aluminum cans.
The bottom side of the chassis is a real mess! The last guy in there was a real hack! He cut the terminal tabs off the Bakelite blocks when they did a half a** job of recapping! He just let them float. Thanks to VntgRads and Nathan for their under side photos. It really helps to identify what should be there. Thanks to Chuck Schwark for providing a READABLE schematic! His copies are much better than the others I have found. Otherwise, I was just guessing.
I am going thru the Bakelite restuffing now. I am pulling them, removing the old cap, and throwing them in the ultrasonic cleaner with heat and Simple Green. It removes the last traces of tar/wax potting and provides clean terminals for resoldering. It takes a while, but worth the effort.
Speaking of the chassis, it is very dirty/dusty, no rust, but almost black. I usually do not do more than dust removal. (After all it is over 80 years old! And should look like it.) But in this case I think I would like to clean it up a little better. It seems as if I have read, somewhere, about using a bathroom cleaner, like Scrubbing Bubbles, for cleaning up the chassis. Any comments on using something like this, or anything else? I have not decided yet about removing the coil cans to clean them up. I know that Simple Green and the ultrasonic cleaner did a great job on the aluminum cans.
The bottom side of the chassis is a real mess! The last guy in there was a real hack! He cut the terminal tabs off the Bakelite blocks when they did a half a** job of recapping! He just let them float. Thanks to VntgRads and Nathan for their under side photos. It really helps to identify what should be there. Thanks to Chuck Schwark for providing a READABLE schematic! His copies are much better than the others I have found. Otherwise, I was just guessing.
I am going thru the Bakelite restuffing now. I am pulling them, removing the old cap, and throwing them in the ultrasonic cleaner with heat and Simple Green. It removes the last traces of tar/wax potting and provides clean terminals for resoldering. It takes a while, but worth the effort.
Chris H
N9WHH
