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#1
02-25-2016, 05:38 PM
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Zenith 12" Porthole
Just picked up this zenith porthole, model G2745-OX. It has the metal coned 12" 12UP4. It uses chassis 27F20. It looks lik the schematic glued in the lower inside part of the cabinet, has a second schematic glued on top of another one. I guess zenith made changes. I'm trying to determine if it's a 1948 or 1949 set. It came with its knobs, I just left them on s bag on top for now. After I finish my 1951 philco 16", I will move in to this set next. I love the flip open doors and prismatic viewing dials on the 1949 portholes and have been searching for a console. It's wierd this model is not listed in the sand index, only the chassis? The CRT tests weak, but I think after a little cooking it will be viewable. This seller also had a extra set of knobs that I need for my zenith 29t926 I've been working on!
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#2
02-25-2016, 05:58 PM
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Chassis # = way to tell electronic guts apart, Model # = way to tell the different wood boxes they often put the same guts in as other boxes apart. It was common to not bother to list all the wood box identifiers in the schematic indexes.
The chassis number is always the first number to search on all, but the more unique sets.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#3
02-25-2016, 08:02 PM
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Whoa, nice looking set. That cabinet doesn't look like it even needs much attention Plus you got the knobs to finish your 29t926. Can't beat that. You are a porthole magnet.
 
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#4
02-25-2016, 09:03 PM
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Ok I hate to jump someones post but does anyone have a good 12UP4 to sell? Also could use the left side knob door Thanks and sorry again
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#6
02-26-2016, 02:42 PM
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Quote:
__________________
Vacuum tubes are used in Wisconsin to help heat your house. New Web Site under developement ME http://AntiqueTvGuy.com
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#8
03-03-2016, 12:13 AM
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Restoration is under way on this porthole. I've replaced a couple open sand coated resistors and as many capacitors as I had replacements on hand for. This set has 7 multi section electrolytics, so I have got to order plenty of those too. I'm amazed at how many bumblebee caps and white colored caps are cracked open on this set. Many 1meg+ resistors are lower in value, instead of the normal drift above value. I'll finish correcting the horizontal rolling on my 1951 Philco 16" while I'm waiting on parts.
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