[Ron Ramirez]

Now, a side by side comparison of the 1st IF transformer from the 6-S-128 and the 1st IF transformer from the 6-S-254.

   

Hmmm. The windings are completely different. About all this told me is that (at least in the 1938 model), the two windings are spaced very far apart on the dowel.

So, just out of curiosity, I removed the shield can from the 6-S-128's 2nd IF transformer.

   

Hmmm (again). This one is made like the 1st IF from the 1938 Zenith.

Ultimately, I decided to attempt a repair of the 1937 model's 1st IF transformer.

I moved the lower winding almost to the bottom of the dowel (in a similar manner to the 1938 model's 1st IF) and then used hot glue on the bottom and top of the triple winding to hold them in place.

I had previously found the break in the lower winding and carefully pulled on it (fortunately, it was on the outside which made this possible). Luckily, the wire easily came loose, enabling me to remove a couple of turns. I then reconnected it to the proper terminal on the top ceramic insulator. I also installed new wires.

Here is the finished product:

   

I checked continuity with my DMM. Primary 8 ohms, secondary 7.5 ohms. (It was a primary lead which was broken.)

Success!

Now, two photos showing the original 1st IF can mounted back on the 6-S-128 chassis.

   

   

I failed to mention above that I had placed the mounting nuts and lockwashers in an Evapo-Rust bath and left them to soak all day, so the 1st IF, the 2nd IF shield can, and two nuts from one of the RF coils were not reinstalled until this evening.

I also checked continuity of the 2nd IF transformer. It sort of bothers me that its primary measures 69 ohms while the secondary is around 7.4 ohms. It makes me wonder if there is an issue with its primary? Well, I will find out when I try the set out for the first time.

I reinstalled the 1st IF from the 6-S-254 back onto its original chassis after replacing its wires. I did not hook it back up, though. The 6-S-254 chassis looks restorable and who knows, it may end up being restored as well. I don't know what I would do with it, however.

Anyway...

Other work accomplished today:

• Installed a new, cloth-covered AC cord and an old AC plug.
  
• Installed new LED dial lamps. (Now the burn marks on those light diffuser disks will never get worse!)
  
• Tested the chassis (with all tubes removed) by applying power. When the off-on switch was switched ON, the LED lamps lit up properly. No sizzling or other odd sounds were noted.
  

So after I test the tubes and make sure they are all OK, this chassis is now ready to try out. This will happen in the morning.

Until then...