08-08-2021, 06:05 AM
What is with the cones on these old RCA radios? This is the second one I have had to repair. While I was doing the alignment and testing the radio on all three bands, I noticed distortion when the volume was at all above medium low, getting worse with increased volume. I had looked over the speaker quickly before I began to test the radio, and it looked fine, but there must have been a little crack forming where the cone attached to the voice coil, which just got worse as I used the speaker. So, I repaired it. I used a compass to draw two concentric circles one well outside of the crack, and one just a hair bigger than the center where the voice coil is. I then glued it well to both the voice coil and surrounding cone using RTV rubber cement. I slit the circle from the outside to the inside diameter, so that it could overlap slightly as it accommodated for the cone shape. Now I have to let it sit a day or so for the RTV to set up well before I proceed further. I need to start on the cabinet anyway. The radio itself is working fine.
[Image: https://64.media.tumblr.com/43b11c50c1b5...69fc0b.jpg]
[Image: https://64.media.tumblr.com/43b11c50c1b5...69fc0b.jpg]