01-10-2015, 03:56 PM
Well, I pulled it all out of the cabinet, flipped the chassis over and looked things over carefully.
I fired the thing up on the bench and it worked fine.
I did tap tubes (gently) as well as all RF and IF transformers with the insulated end of a small screwdriver while the radio was playing. No ill effects were noted.
So here's what I did, in no particular order:
I found two questionable solder joints, and resoldered them.
I sprayed the tuning condenser out with compressed air.
All of the coil shields are held in place with two nuts (per can) under the chassis. I noticed that one of the cans was missing a mounting nut. I added one. I made sure that all of the nuts were tight.
I sprayed the band switch and the motor switch with DeoxIT.
After all of that, I tried it out again. Worked fine. I even wiggled the tuning knob rapidly as I tuned on either side of my SSTRAN signal at 660 kc. No problems.
In a little while, I'll put everything back into the cabinet again and we'll see how it behaves.
Oh, I found that Lowe's sells 250 foot rolls of brown 18-2 SPT-1 zip cord. So...now the Zenith has new brown AC cord and a new plug.
I fired the thing up on the bench and it worked fine.
I did tap tubes (gently) as well as all RF and IF transformers with the insulated end of a small screwdriver while the radio was playing. No ill effects were noted.
So here's what I did, in no particular order:
I found two questionable solder joints, and resoldered them.
I sprayed the tuning condenser out with compressed air.
All of the coil shields are held in place with two nuts (per can) under the chassis. I noticed that one of the cans was missing a mounting nut. I added one. I made sure that all of the nuts were tight.
I sprayed the band switch and the motor switch with DeoxIT.
After all of that, I tried it out again. Worked fine. I even wiggled the tuning knob rapidly as I tuned on either side of my SSTRAN signal at 660 kc. No problems.
In a little while, I'll put everything back into the cabinet again and we'll see how it behaves.
Oh, I found that Lowe's sells 250 foot rolls of brown 18-2 SPT-1 zip cord. So...now the Zenith has new brown AC cord and a new plug.
--
Ron Ramirez
Ferdinand IN