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#106
09-17-2002, 01:15 PM
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I can't tell if the slot is the same or not, this one was made to mount into a flat panel and yours looks like it meets the grille cloth but who knows.
There is a picture of your set on the ETF Site: http://www.earlytelevision.org/rca8tr26.html and it looks the same as what I have. No way you could reproduce this thing, it is a big chunk of molded plastic, reverse painted, sort of a prism actually. you are welcome to have this one. Here's a photo, note the "scratches" are actually dirt on my scanner 
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#108
09-17-2002, 04:04 PM
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Quote:
Marlin
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#109
09-17-2002, 08:37 PM
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The 721 is looking much better!
I put the last two filter lytics inside the can today (I was able to hide ALL the can lytics because they had paper covers) changed out the rest of the bad resistors, cleaned and oiled the tuner, replaced almost all the 6AG5's because they were weak or shorted, a couple of the 6J6's are weak too but I can't find my new ones just now. Anyway this is channel 7 ABC using rabbit ears. The sound is weak and drifts a lot but I am loath to try and align it, never done that before and I'm not sure I can. Eric
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#112
09-18-2002, 07:01 AM
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Eric and friends:
Thanks for showing if Duct Tape can save Apollo 13 it can help with a TV restoration! Somebody ought to do a site on the myrid uses of this 20th century marvel. Red Green fans unite! While we are on the subject, more or less, of tv's with integrated radio tuners, anybody seen this Dumont before? I found it with badly damaged cabinet in an antique mall. Paid $40 which probably was too much but the radio dial arrangement interested me. It is the same sorta dial the RCA has. Marlin 
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#113
09-20-2002, 01:30 AM
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Getting back to my 721 for a moment.
I cleaned up the cabinet, and reassembled it, made all the little adjustments and so forth. As always some little problem had to rear it's ugly head. When I was working on it I used a small test CRT and a scratched 10BP4, but now I put the original CRT in and it Seems it has a H-K short when it warms up.  I'm getting streaks in the picture and it alternates between a normal and dark picture, tapping on the neck also aggravates it. The B&K tester seems to verify it although it only shows a very small leakage. An isolation transformer should cure this shouldn't it??
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#115
09-20-2002, 07:28 AM
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About the 721's alignment, don't try it without a scope, sweep generator, marker generator, frequency counter, VTVM and special radio/tv-alignment screwdrivers. If you're within a reasonable distance (an hour's drive or so) of Warren, Ohio then you could drop the set off at my shop. I'd do the alignment for 1/2 the price I normally charge and have it ready for pickup in about a week.
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#116
09-20-2002, 07:43 AM
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Radio Shack still sells a small kit of alignment tools, but you'd do better to find a "pro" set on eBay. They're insulated for safety and made of a "low-capacitance" material so the proximity of the tool won't affect the circuit. Once you've got the correct tools and test gear, do some reading about "stagger tuned" television IF systems in an old textbook and follow the alignment instructions in the Sams packet.
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#117
09-20-2002, 09:09 AM
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721
Eric,
I know how hard you worked on the cabinet restoration alone and want to congratulate you on a gorgeous restoration. This set looks just like new! You can come and restore my sets anytime.  That RCA label on the front at the bottom of the glass, is that a new repro? If so where are they available?Rob
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#118
09-20-2002, 07:00 PM
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Rob, actually I haven't done anything to the cabinet except clean it with some Pledge Orange Oil cleaner. I did use a fine Scotch Brite pad to clean off the top a little.
The front is in very nice shape and all original including the RCA logo, I removed the glass and cleaned behind it. The main cabinet has a couple small veneer chips at the back and the bottom where it doesn't show and there is a lot of crazing in the Lacquer that doesn't show up in the photos but overall it's pretty nice and I think I will leave it alone. As for alignment, it's doesn't seem to need it after all, it works great hooked up to the DirecTV satellite box! I might try aligning my Olympic as a learning experience, it is fouled up anyway. Eric
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#120
09-20-2002, 08:28 PM
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Re: 721 restoration
Quote:
I still haven't finished that one. I started Lacquering it and it wrinkled and cracked and basically I have to restrip it and start over. It also doesn't have any audio/video and the non-original HV supply likes to die now and then... 
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