1956 Zenith Z733Y Clock Radio Service and Telechron Clock Repair

[@indieshack4476]

Thanks sooo much for posting this. I have a "project" from eBay arriving soon, looks identical (same color, model etc) except the clock has an extra knob above the dial. You did a great job!

[@kilcar]

I've learned like many others the hard way that the little plastic clock knobs will fall apart upon contact one out of three times. I lube the clock mechanism before I turn them. The big mechanical gears are dirt and grease magnets, so a spray of Break Free or WD- 40 loosens them enough to help keep the plastic knobs from being over stressed.

[@kilcar]

Thanks for this video. I just aquired the identical radio- chassis, but in maroon.Note the 6volt tube ( in a 12 volt filament string!) on the far right corner. Note some Chassis used a 12- volt tube at that position. Lots of variety in the chassis on this model. Aga in n, that's for your expose'!

[@levimevis5192]

I’ve got the black version of this radio that I picked up at goodwill for $5 and it was working still when i got it but then I had to recap it later on, mine has all of the original Zenith Tubes in it.

[@mechtrician1]

I have another video coming on it. It developed silver mica disease in the first 2 days. So I am recapping the IF cans now.

[@levimevis5192]

@@mechtrician1 mine actually did something similar but it turns out it was a bad tube, it was the 12AT7 tube that was bad it was intermittently shorting, I also replaced the 19T8 tube as well because those are notorious for going bad in these radios. I was always told that the bigger IF cans don’t develop silver mica disease and that it’s mainly the smaller cans that do that.

[@mechtrician1]

Also had this issue with a 12ba6. The filament was shorting to the grid.
These definitely develop silver mica disease, but yes the smaller ones are much worse.
You’ll see in this next video how much the wafers have degraded.

[@levimevis5192]

@@mechtrician1 I think it depends more on the storage conditions whether or not these radios developed Silver Mica Disease as well. I’m actually self-taught when it comes to electronics repair, I’m 33 years old and I grew up during an era when stuff was made to be “throw-away” but I was always fascinated by the older “repairable” electronics from the 1970s on back (like TVs, VCRs, Stereo receivers, record players, tape players, etc. so I taught myself how to diagnose and repair them.

[@stun3282]

Could someone help me try to fix the alarm on mine? Someone else fixed it and made it so I can’t pull out the back clock adjustment mechanism to se the alarm

[@dancook4993]

Those telecrons last forever I have 2 1920s telecrons with Westminster chimes