1957-58 Zenith Z2230RZ (Ch. 19Z32) 21" B&W tabletop project log

[Electronic M]

That ain't a locking mech on the knobs. Just a spring to help them grip/keep the plastic from splitting. Don't try to remove the springs, just pull the knobs normally as they were designed to be.

If you plan on collecting more sets you really should get a variac or make a dimbulb tester to soft power your sets.

[cj_reha]

Originally Posted by Electronic M

That ain't a locking mech on the knobs. Just a spring to help them grip/keep the plastic from splitting. Don't try to remove the springs, just pull the knobs normally as they were designed to be.

If you plan on collecting more sets you really should get a variac or make a dimbulb tester to soft power your sets.

Thanks for the heads up. I'll try to gently pull off the broken knobs later, hopefully they won't put up too much of a fight. Patience is key...

As for needing a variac/dim bulb tester, I am well aware. I'll get around to it somepoint, this is one of the few exceptions in which I powered on the TV before going through the caps/resistors/etc.

[zeno]

As Tom C said the knobs just pull off. On some sets the horz hold
is an exception. The knobs are common & used up till abt 1970
with different sizes etc.
You will enjoy restoring this much more than the Philco. They were
not famous for there ease of service ! Zeniths are easy & as well built
as any & better than most if not all.

73 Zeno
LFOD !

[cj_reha]

Originally Posted by zeno

As Tom C said the knobs just pull off. On some sets the horz hold
is an exception. The knobs are common & used up till abt 1970
with different sizes etc.
You will enjoy restoring this much more than the Philco. They were
not famous for there ease of service ! Zeniths are easy & as well built
as any & better than most if not all.

73 Zeno
LFOD !

The knobs turned out to be much easier to remove than I thought, I found an old clamp used originally for pulling ICs out of their sockets and it worked flawlessly. You guys were right! Hoping this'll be a nice break from the pain and suffering that is the Predicta chassis, point-to-point soldering is very therapeutic. Parts are on order...

[cj_reha]

I pulled the chassis tonight, took a bit of elbow grease but it eventually slid out. Looks relatively unmolested, lots of ceramic encased paper caps and bumblebees. I already see a cap which wasn't listed in the Sams, a .0015uF ceramic.

The CRT is branded Channel Master, appears to be a rebuild. I also spy some non-Zenith tubes littering the chassis (the horizontal output and damper tubes are GE), so it's obviously got some hours on it, but nothing appears to be majorly worn out.

Parts are being shipped right now, so I can hopefully start recapping in the next few days...