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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 |
#2
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So many projects, so little time... Last edited by Alex KL-1; 04-11-2024 at 12:48 PM. Reason: Bad spelling |
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The gear on he back of the TV dial makes setup easy. I used the signal generator to output a crosshatch pattern on channel 4 and when it was perfectly tuned, I slipped the dial onto the shaft engaging the dial gear teeth with a lower reduction gear on the tuner and channel 4 illuminated by the dial light and the tuning bar through the opaque portion. I tried checking the accuracy moving the generator to channel 7 output and rotating the dial towards it and that's when I noticed the dial mismatch. I'm curious to know how the FM tuner works. Both dials spin in the same direction but at different rates, the FM dial turning much faster than the TV dial. There's a wide, opaque region on the TV dial labeled "FM" and my guess is by the time that area traverses the dial light, all of the FM stations on its dial will spin through the opening allowing tuning across the broadcast FM band. But none of this is going to happen until I find the appropriate dial or...dare I say...swap out the tuners. That's a daunting prospect for sure.
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#4
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Picture Shaping Up
Sound and picture aligned. I'm going to install the 12QP4 later tonight and see if it's any better but this is performing well. Soon I'll turn my attention to the cabinet. It has all the original brass screening on it and it's in pretty good shape. I have an original hinged metal back on the parts chassis and I got a decal set from RadioDaze.
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#5
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Started on the cabinet. The lacquer on the cabinet is so thick! I hate strippers and the mess they make so I used my scrapers to get the bulk of the finish off. Slow going but this is going to be a collection showpiece so I’m taking my time.
Image deleted...see below Last edited by Chris K; 04-12-2024 at 07:08 AM. |
Audiokarma |
#6
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Great progress. It can be tough along the way but if you persevere you will get there! If you go to page 21 of this Dumont Service News it shows the different dial configurations and part numbers. https://www.earlytelevision.org/pdf/...s_vol23-11.pdf
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Tim |
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Sorry for that gigantic picture. I uploaded it from my phone and I guess it chose the biggest version available. Here's a more reasonably sized group of photos.
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#8
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#9
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I'd switch to lacquer thinner at this point to get the last traces of finish off and even out the color. You don't want to sand through that nice veneer.
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#10
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Will do. I made a vow… no power sanding!
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Audiokarma |
#11
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Swapping tuners on these isn't too hard...3-4 wires and some screws. I had to pull the tuner on one in the last year to get in and fix the antenna coupling cap that had went open... Until I did that I was wondering why the tuner was so darn snowy.
I favor lacquer thinner and steel wool for stripping...Seems to be the best combination of cheap fast and minimal cleanup.
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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 |
#12
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My big concern, for both stripping and finishing, are the angled vented sections that transition the top from the sides. I said earlier the brass screening here and on the bottom of the cabinet are pristine. When I do the front, I intend to remove the safety glass and surround and the brass ring around the tuning 6AL7. The screens are another matter. I can't see removing them (just the vents) but how in the hell am I going to spray a finish on this without getting lacquer all over these screens? Masking them would be very difficult but an option. |
#13
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How are the screens attached? Stapled on the inside? If so, pry they off with a screwdriver.
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#14
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Very small staples maybe 1/8th of an inch across the top. I’ll give it a shot
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#15
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Sometimes you can pull staples with a good pair of needle nose pliers...
__________________
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 |
Audiokarma |
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