10-13-2014, 09:22 PM
While waiting for some help on the electrical issues (I know I need to provide more symptoms and voltage readings for anyone to start giving suggestions - I just needed to walk away from the electrical side of the radio after such a let down), I decided to tackle some mechanical issues.
The first was the dial hub that was not always rotating with the vernier drive and tuning capacitor. I was getting ready to disassemble the veneer drive to see if there was an issue in there, when I looked down between the metal plates. i noticed this seemed to be the area where the slipping was occurring. I stuck an allen wrench in this set screw, and sure enough, i was able to tighten it a little. Now the dial hub is moving with the veneer drive.
The second issue was to tackle the old dried up flex coupling. The rubber was stiff and cracking:
I followed Mondial's guide on the Phorum on creating a new one. Minus the saving the brass rivets, cutting new rivets on a lathe, and using a punch to cut the holes. I opted for a couple #8 screws (3/8" to replace the brass eyelets, 1" to replace the steel rivets), washers, and nuts. I just used the Dremel to grind away the lip on one end of the rivit, and they popped out with a punch. Then I traced out a 2" circle and in it, a 7/8" circle. I cut the 2" circle with scissors, and the inner circle with an exacto knife. Then I drilled the screw/rivet holes with a 3/16" drill bit.
It's not nearly as pretty as Mondial's, but it gets the job done witht he tools and skills I had at hand.
So, now back to collecting readings and symptoms. At least now I can reattach the tower and mask/dial scales, so I can see what I'm tuning to.
The first was the dial hub that was not always rotating with the vernier drive and tuning capacitor. I was getting ready to disassemble the veneer drive to see if there was an issue in there, when I looked down between the metal plates. i noticed this seemed to be the area where the slipping was occurring. I stuck an allen wrench in this set screw, and sure enough, i was able to tighten it a little. Now the dial hub is moving with the veneer drive.
The second issue was to tackle the old dried up flex coupling. The rubber was stiff and cracking:
I followed Mondial's guide on the Phorum on creating a new one. Minus the saving the brass rivets, cutting new rivets on a lathe, and using a punch to cut the holes. I opted for a couple #8 screws (3/8" to replace the brass eyelets, 1" to replace the steel rivets), washers, and nuts. I just used the Dremel to grind away the lip on one end of the rivit, and they popped out with a punch. Then I traced out a 2" circle and in it, a 7/8" circle. I cut the 2" circle with scissors, and the inner circle with an exacto knife. Then I drilled the screw/rivet holes with a 3/16" drill bit.
It's not nearly as pretty as Mondial's, but it gets the job done witht he tools and skills I had at hand.
So, now back to collecting readings and symptoms. At least now I can reattach the tower and mask/dial scales, so I can see what I'm tuning to.
