TV Treasures - Page 34 - Videokarma.org TV - Video

Jeffhs · #**496** 12-09-2007, 12:00 PM

Quote:

Originally Posted by Tubejunke

It looks quite a bit bigger than a 19" to me. There were some large round tubes made, mostly used by DuMont. The 19AP4 does seem to get a bad rap. I wonder if other metal/glass crts are as troublesome. The issue is vacuum loss at the seam. If that were the case they all would be trouble.

I wonder why they ever made the metal tubes.

I once had a Majestic TV (1951 model) which had a round 16GP4 CRT (metal cone). Never had one bit of trouble with the tube losing vacuum or anything else. Also, I did not realize that round CRTs had seams anywhere in or on them; in fact, I don't recall seeing a seam anywhere on the 16GP4 in my set. (I learn something new all the time reading the posts in these forums.)

Round metal-cone CRTs: I agree with you one hundred percent. Those tubes worked well enough, but the metal cone created the heck of a HV shock hazard, as I think the cone was one half of an HV filter capacitor, the bell of the tube being the other (this technique, IIRC, replaced doorknob HV caps in many if not most 1950s sets with round CRTs). IMHO, the best thing ever to happen to television CRTs was when the manufacturers gave up on metal-cone tubes and switched to glass exclusively, which all but eliminated the shock hazard.

Whirled One · #**497** 12-09-2007, 03:13 PM

Quote:

Originally Posted by jpdylon

Just a rarity. I see the standard looking SC stuff from time to time, but never ones that look like this.

I suppose I should have said, 'Its not one you'll see anytime soon'

THe SC modular chassis were very well designed and are a breeze to work on. They also produce a pretty damn good picture.

I think you may be confusing Stromberg-Carlson with Setchell-Carlson; they were two different companies. Setchell-Carlson sets were known for having a modular "unitized" chassis, but weren't Stromberg-Carlson sets more typical in construction..?

***Eric H*** · #**498** 12-09-2007, 05:06 PM

Quote:

Originally Posted by Jeffhs

I once had a Majestic TV (1951 model) which had a round 16GP4 CRT (metal cone). Never had one bit of trouble with the tube losing vacuum or anything else. Also, I did not realize that round CRTs had seams anywhere in or on them; in fact, I don't recall seeing a seam anywhere on the 16GP4 in my set. (I learn something new all the time reading the posts in these forums.)

The metal cone tubes have a seam where the glass face is bonded to the metal cone, they also have a seam where the neck is joined to the other end of the cone.
That said I have a 50+ year old 16AP4 that is still holding vacuum as was the worn out tube it replaced.
I think the bigger tubes (19", 24" 30") probably had more problems because of the larger joint surface and the extra expansion contraction problems.

The metal tubes don't hold a charge on their own but I guess you could still get shocked with the set off if the doorknob cap was charged up.

jpdylon · #**499** 12-09-2007, 07:10 PM

Quote:

Originally Posted by Whirled One

I think you may be confusing Stromberg-Carlson with Setchell-Carlson; they were two different companies. Setchell-Carlson sets were known for having a modular "unitized" chassis, but weren't Stromberg-Carlson sets more typical in construction..?

You're right setchell carlson is what I was thinking of.

Tony V · #**500** 12-10-2007, 01:12 PM

Quote:

Originally Posted by jpdylon

You're right setchell carlson is what I was thinking of.

Dont feel bad as i get the two confused once in awhile myself. Still a cool tv though.
-Tony

Captain Video · #**501** 12-12-2007, 12:46 AM

http://cgi.ebay.com/16-VINTAGE-TELEV...QQcmdZViewItem

jpdylon · #**502** 12-12-2007, 11:39 PM

A mid 50s Halolight
http://sandiego.craigslist.org/csd/clt/505328826.html

Not mine.

YamahaFreak · #**503** 12-13-2007, 12:52 AM

I didn't see this one on the first page, so here it is:

http://cgi.ebay.com/ws/eBayISAPI.dll..._promot_widget

The seller says he blew a resistor by turning up the focus control. I wonder what that means? Maybe he incorrectly replaced a cap or two?

Looks like a nice little set.