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The speaker rattles at anything above a whisper volume control setting and mainly on FM where the bass is heavier. I will attempt to repair it if possible.
I've got a '67 plastic solid state Zenith clock radio that's built on a steel chassis with plug in transistors. I have a '69 Zenith SS radio that I got from my uncle when he passed away that's built on a PC board chassis that's riveted to a metal frame, IIRC. Then, I've got the higher end Zenith here.
As shocking as it may seem, I have a '50's Zenith tube type AM clock radio that's on a PC board chassis. Imagine my shock when I found that.
Zenith did make handwired TV sets up into the '70's. The early solid state ones used PC board modules that plugged in to a steel handwired chassis that looked like a tube chassis. These were probably the best solid state TV's that Zenith made. Then, the vertical chassis chromacolor II's came out. These still used PC board plug in modules on a handwired chassis. Then, the System 3 chassis came out in '78. This chassis consisted of near 100% modular PC board construction and the modules were connected via cables. The last vertical chassis CCII's with the handwired chassis was made in late '79. There could have been some made in early '80; but, Nov, '79 is the newest one I've seen.
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