Cbs Columbia b&w tv

[timmy]

Has anyone heard of a cbs Columbia tv from the 50s, are they worth getting or even holding onto. I don't have the model but it is complete, I can get it along with a 50s magnavox probably cheap with a tub of tubes, both are the tall box type black and white sets.

[Sandy G]

Well, it COULD be a Natalie Kalmus model... She was the wife of the head knocker of Technicolor, & was a reasonably important woman back when. I've seen pics of a couple "Natalies", & they are VERY "1950" looking. Dunno who made them, & they might be full of "Unobtainium" parts, but you never know. If you can get it cheap, might be well worth it. I THINK CBS-Colombia was in cahoots w/ ol' Nat... Could be wrong, though..

[electronjohn]

Found this one on Bing:

https://www.bing.com/images/search?v...pvt=cbs+tv+set

[timmy]

Ok so I picked this cbs Columbia model 22c38 set up and checked the 21yp4 crt and it came up pretty high on the scale. But I don't know if this model is even worth holding onto or restoring. It is complete but the front safety glass is broken. Does anyone know who made the chassis or where to get a chassis number from or did they go by model of the set to match a schematic.

[Tim]

That model is covered in Sams 214-2 and 255-3. Possibly 2 revisions of the chassis. The chassis type may be a 4 digit number beginning with 7 or 8.

[timmy]

Is there another number that cross references the equivalent to a fly 58 flyback transformer.

[timmy]

Well I don't like brighteners but does anyone know which brightener I would need for a 21yp4 tube. I didn't realize how many different ones there are. Would this tube be a 110 degree tube ? The chassis is parallel wired. Unless someone here has a brightener that would work for this tube that wants to sell it.

[DavGoodlin]

21YP4 is a 70 degree tube, but any brightner with the same base such as a 90-degree 21CBP4/21ATP4 will work. I bet you might have one! This was the era of DIY ad-ons at least for BW TV, so these are pretty common.

I acquired a CBS 22C07 21" console from Kamakiri and its a solid set with a good CRT and all out favorite common tubes, just that its in a 10-year plan backlog before I get to it.

After losing the color war, CBS was just trying to stay in the game with a decent monochrome, so its probably worth your efforts

[Tom9589]

The 21YP4 is a 70 degree CRT. The type of brightener you need is based on the filament arrangement and the physical base of the CRT. In your case you need a parallel brightener with the common 12 pin base.

I see Dave beat me to the punch.

[Electronic M]

In a pinch you can also take a brightener with a different base yank the heater step-up transformer (the part that makes it a brightener) out and wire that in series with the heater.... I've done that before.