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#31
10-18-2011, 08:56 PM
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When your remove that 16EP4 picture tube, take note where a round cardboard insert goes. I'm not 100% sure where mine went and installed it in the back inside the Focus Coil. I wonder if it should have been inserted in the Yoke.
Can you verify this for me? Thanks Carl
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CW 1950 Zenith Porthole - "Lincoln" 
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#32
10-20-2011, 09:09 PM
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Quote:
I only have one set that uses a 16GP4 and I now have 2 good spares for it so I'll pass. I'm sure someone else could use it ? Quote:
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#33
06-09-2025, 11:46 AM
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Since I'm on the porthole bandwagon lately, let's finally dig into this puppy! Hey, it's only been 14 years.
 I'll start with the power supply. 
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#34
06-09-2025, 02:30 PM
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What exactly defines a " porthole tv"?
Is it the round CRT? or something else? Is the RCA 630TS one? or the Maggy Brittany? Is it something only given to the Zenith line? 
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#35
06-09-2025, 02:51 PM
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'Porthole' is when the whole round face of the CRT is surrounded by a bezel (think boat window) vs a 'double D', where the top and bottom are hidden.
Last edited by old_coot88; 06-09-2025 at 10:22 PM.
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#36
06-09-2025, 03:55 PM
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Exactly - fully round bezel. Here are some other brands.
Stromberg Carlson TC-10  Raytheon/Airline  TeleTone 
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#37
06-09-2025, 07:35 PM
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Main filter cap has spewed it guts and will have to go. I started replacing parts then decided it was just too rusty to continue.
Instead, I drilled out the rivets and removed everything.    Prepped for primer then Rustoleum specialty epoxy appliance paint.   I repainted the power transformer too.   Ah, that's better    
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#39
06-10-2025, 10:44 AM
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Thanks.
My plan is to try getting it running using the currently installed replacement flyback. Then, I'll try swapping in the original Zenith flyback from my spare parts chassis. I already recoated it but have not tried it out yet.   
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#40
01-27-2026, 02:40 PM
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Finally getting back to this project.
Having an identical, all original parts chassis makes it much easier to work on. Especially since Sams only published a schematic for it.  There are two 4-section twist locs buried in the center of the chassis under the yoke support. Really no room for adding terminal strips or cutting them open in place. So, I took the time to disconnect and unmount them, cut them open and restuff. I hope to power it up this weekend and see if that recoated flyback works.   
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#41
01-27-2026, 05:23 PM
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You're lucky you found an identical chassis. I've found 3 different variations of chassis that use the 16EP4. One of which did not have the separate power supply, everything was on the main chassis. Damn. that thing was busy underneath.
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#42
01-27-2026, 07:20 PM
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Quote:
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#43
01-27-2026, 07:39 PM
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Quote:
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#44
02-02-2026, 10:19 AM
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Ready for a first power up.
 
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#45
02-02-2026, 10:20 AM
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It's alive!
 They used neon bulbs for the dial lamp.  There's still some work to do. It takes a while for HV to come up and the screen to fill out horizontally. Hoping it's just a tired tube. Tuner also needs a good cleaning. Finally got an image after fiddling with it Normal mode  Porthole mode 
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Linear Mode
