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#1
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Crosley 9-403M Restoration
Time to start another restoration. This one will be my Crosley 9-403M.
S/N 1528 112320. Overall the tv is in good shape. The cabinet is in great shape except for some scratches on the side and a small piece of missing veneer in one of the top rear corners. All easily taken care of. BTW, no back. Anybody have a picture of one so I can make a back for this tv? The chassis looks like it has never been worked on underneath. No evidence of any work. Of course there were some tube changes along the way. The metal chassis has the usual plating dust all over it. Everything steel has it. A quick trip to the quarter car wash and most of it is cleaned away. Though the metal will have to be scrubbed clean. The chassis looks like it was made from galvanized steel. It appears that something has "run" on the surface of the chassis. This makes me think it's from the galvanizing process. Now the one bit of bad news. When I got this tv I did a quick check on the CRT. It checked real good! Problem was is that the 10BP4 CRT is gassy. Yup, there is a purplish glow around the inside diameter of the tube. BTW, this tube is a rebuild. I have several 10BP4's that checked good from "donor" tv's. |
#2
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Ah, it has one of them new-fangled invisible CRT's. Nice.
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#3
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Crosley
Safer that way, no worries about implosion!
Very nice looking Crosley, best wishes as you restore it!
__________________
[B]"Bee care-eh-full to don't broke thee pic-sher tee-yube!" :-) |
#4
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What are the dimensions of the set? I may have a back that would work.
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#5
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The width would be 20 1/2 inches and the height of 10 1/4 inches. I got the height from "witness marks" on the back edge of the cabinet.
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Audiokarma |
#6
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I used a 1/2 inch square piece of hard maple to make a "stand" while I work on the underneath part of the chassis. I removed the tuning scales to keep them safe. I then tape some folded over paper towels to the top of the power transformer and to the top of the HV cage to protest them while inverted.
I used an existing hole in the chassis and bolted on a small cross-member so the stand will stay in place. Much easier to work on when it is this way. |
#7
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That set is a Dumont made or at least a Dumont based design. Dumont loved those zip-cord capacitors. One or two of my RA-103 chassis used those zip cord caps, the other used a regular capacitor.
__________________
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 |
#8
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Seeing it is a Dumont based design, should it be a good playing tv?
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#9
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Quote:
Was it DuMont-based? Maybe comparing schematics would tell you. Since Crosley eventually used a DuMont clone chassis, the two companies might have had some kind of earlier licensing or technology exchange agreement, short of full cloning. As for replacing the gimmicks with mica caps, why replace them at all? They are just pieces of wire. What could go wrong with them? Phil Nelson Phil's Old Radios https://antiqueradio.org/index.html |
#10
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Phil,
Thanks for the insight. I have to admit, this TV will be a bear to recap. Lots of caps and resistors. Some jammed pretty tight. |
Audiokarma |
#11
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I finished re-stuffing the E-Caps. Then I installed them.
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#12
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O_o weirddddd.
I'm guessing the 'zip-cord' cap is to capacitors what fusible links are to fuses? |
#13
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Also called gimmick capacitors. The (very small) capacitance depends on the wire length and how it is twisted/bent. So don't bend them into cute new animal shapes.
Phil Nelson Phil's Old Radios https://antiqueradio.org/index.html |
#14
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Quote:
BTW, could I just use some micas instead? |
#15
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I forgot to post this picture of the chassis with everything labeled.
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Audiokarma |
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