I tend to stray from the transistorized models. They are a little more crammed and the success rate in the long run is not always worth it to me. The electrolytics can open and cause the output stage to oscillate at high frequency and can destroy the output transistors. You might check to see if they are shorted.
The fact is although the transistorized series are nice collectibles, the older transoceanic series was built at the pinnacle of tube radio technology. The build quality and sensitivity of the older tube TOs far outweighs that of the later transistorized counterparts. However, zenith was pressed by surrounding companies and the public to go the way of the transistor . They feared that their sales would decline of they stuck with the older technology due to the demand for shrinking portable radio.
Don't get me wrong, they're still cool sets, I just like the tube stuff better
