Zenith A600 Transoceanic Restoration


One of the members of the ARCH radio club in St. Louis gave me this radio to repair. The most exciting part was that it was completely disassembled when I received it. For some reason it didn't occur to me to take lots of "before" pictures, but I do have some from while I was working on the radio. I first replaced all of the paper "bumblebee" capacitors that by now are electrically leaky. I also replaced the selenium rectifier since they have a reputation for failing catastrophically. I discovered that the ballast tube and the 1L6 were both dead, but the guy who gave me the radio was kind enough to include a set of new tubes for it, so replacing those wasn't a big deal. While I was testing the radio during the repair process, I discovered that the orginal electrolytic filter capacitor was still good, so I opted to leave it in circuit since I don't plan on using this radio frequently. One of the pictures shows the process of replacing one of the dial strings which was an exercise in patience. I eventually gave up trying to follow the diagram provided by Sams and figured it out myself.


I cleaned up the cabinet with some Meguiar's automotive detailing spray and salvaged a compatible handle from a signal generator I was giving away. The fold-out map apparatus was also broken, so I bought a used one off of Ebay. I still need to find one more knob for the radio, but it works great...you can listen for yourself by watching the video at the end of this page.




A look at the chassis before I started



Experimenting with dropping resistors for the new diode rectifier



Cursing out the dial cord



Mostly reassembled radio


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