Crosley 307-TA restoration part 1
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- Опубліковано 26 вер 2024
- Let there be smoke...
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I hope the collector you are repairing all these television sets for opens a museum to show the world those beauties!
Sylvania, by Buick.
Delco carried, or OEM branded, a line of GM car radio tubes. Was Sylvania the supplier?
Great initial power-up and video! The first antique TV I worked on was an RCA 8TS30, very similar chassis, and it was quite an experience. Best of luck continuing on with this!
That smoking cap brought back memories of the old TVs we worked on in school. I can smell the smoke just seeing that.
Yes, very distinctive smell. Don't know why I said wax cap in the video - I knew it was an electronic from the smell
Bob, I worked on a customers old military receiver. The 'lytic had a can, I kid you not, 3/32" thick. The 'lytic had blown off its base and crushed over 1/2" of the thick aluminum case down flat against the top of the cabinet. That had to have been one heck of a bang! Cans are always interesting when they vent. Some actually whistle like a tea pot. Most hiss or or pretty quiet when they vent.
Great video and yeah hope the collector opens a museum. Never seen a lot of these set out on the west coast. Love this channel thanks Bob your a Top expert never fail to amaze me love the learning. thanks Mike
I still get a chuckle out of seeing that tiny test CRT in such a huge set. 😄
Little test CRTs were common in the day, I believe.
Especially for these type sets that have no support for the CRT on the chassis
This is like mine that I told you about. Electro-magnet ion trap.
I’ll be following closely as I have a slightly newer version of this on my bench right now. The wiring in these gets BAKED! I thought the early Dumonts cooked their insides about as bad as it could get but almost every wire in these RCA you move you end up with cracked insulation.
Built like a Military spec tv.
Nice job !
After the war, RCA and other manufacturers likely had access to some cheap surplus steel and sheet metal originally intended for wartime use, which may be one of the reasons why they used so much of it in their early postwar models. I've got an RCA 75X14 AA5 from 1947 built in a similar way.
Wow, an unmolested, all original TV; the restorer's dream set! Although premium components were not used in the set, there appears to be lots of design margin built in, something you rarely see in most TVs. That power transformer must be good for at least 600 watts, probably accounting for half the weight of the set. Two 5U4's shows how much power they were dumping into resistive voltage dividers and electromagnets. I suspect electromagnets were used in lieu of permanent magnets for two reasons: tradition and to achieve the high intensity magnetic field required. It seems hard to believe that the 1B3 high voltage rectifier tube is becoming hard to find these days. In the 1950's and 1960's, this tube was the default standard for B&W sets. The can of those radial leaded electrolytics are supposed to be kept electrically isolated. Some manufacturers say the can is acceptable to be at the same potential as the negative lead.
Oh they aren't hard to find. I'm looking to make a bulk purchase though. Ideally 100 or more NOS
@@bandersentv Okay, I understand now, thanks!
Maybe the issue with permanent magnets was quality control of their magnetic field strength. The Curie point of various ferromagnetic materials is much hotter than a picture tube neck could plausibly get in normal operation (several hundred degrees F), so losing their magnetic field is not the issue. Weren't the electron guns in early pre-aluminized picture tubes slanted, so that heavy ions would already be aimed away from the screen? And the magnets intended to redirect the actual far lighter electrons back at the screen?
Yes. Within a year RCA switched to PM. My thinking is these were some of the very first TVs sold to the public and they wanted everything be as good as possible
@@bandersentv Built like tanks, and probably wax paper capacitors were at least believed to survive for the couple of years needed to make a good impression. However, all they'd have to do is ask radio repairers to find out that that wax paper capacitors probably would peter out sooner or later. Also the more tubes, the greater the likelihood that one tube or the other would go kaput soon.
It would be interesting, though, that when you recap this puppy with the kind of capacitors that RCA would have wished it had had back in the day, you also make a list of how many of these paper capacitors tested as actually still good per their labeled specs.
@@SeekingTheLoveThatGodMeans7648 They didn't really have any choice. Plastic film caps were 15 years away.
I love this beautiful over engineered chassis. Amazing it’s all original. Great first power up!
This video proves that owners of antiques TV's should NEVER try to test the set powering it up after many years of inactivity.
Considering this set is practically all-original, would that warrant "disguising" new parts inside hollowed-out old caps/resistors? Maybe the owner isn't too concerned about originality of the parts?
Either way, I agree it's a treat finding a nearly mint original device, especially as old as this TV set :)
Thanks for sharing Bob
Owner is not willing to pay the extra for me to do it. I've done it once before with this chassis and it is a LOT of work. Go back and watch my series on restoring an RCA 630TS. Many, many caps and some are quite difficult to restuff. It's also one of the most common early chassis and far from rare.
I wonder how much bigger that power trans was for the 25cycl version (assuming they made one).
The Bandieman can!💪👍. Are you making more money now then ever in your life? Thanks for your Channel❤
Are there differences in the construction / build quality of the RCA chassis versus the Crosley version? I am curious if its identical or if there are differences between the Crosley badged chassis and one sold by RCA
No, they are identical.
is the transformer big so it can run from 25 hz
No, it's big because the set uses that much power.
TV restore-a-holic huh
Clock is ticking
@@bandersentv Hope this just means the collector wants their sets back asap. Not that you wanted that the news will one day read "Survived by over a hundred restored antique TV sets."
He's based out of New York and pickup is scheduled for the first weekend of Sept. Ideally all the sets would be done by then.
@@bandersentv 3 months to go then, more or less. How many sets remain to finish? or even begin?
@@SeekingTheLoveThatGodMeans7648 eight or so. All have been shown on my channel. The two RCA, Dumont, Philco, Crosley, GE locomotive, airline portable and three Zeniths
Guessing you took lots of pics of the underside too before you began?
Yes, the factory service info is also very detailed and includes a wiring diagram
Excellent idea, with all those cap replacements, it is easy to make a wiring error.