Any one have info on this TV?

[prewtv]

Looking for any info on this TV.
Real, fake ?
With so many knobs, why if not real?

[Dave A]

This was in a living room photo on the cover of some home decorating magazine in the late 40's. I have the full photo at home and will try to post later. Pure design fantasy.

[jshorva65]

It's fairly obvious that it's fake, but that's a neat concept that Philco's engineers likely saw and used as the inspiration for the famed Predicta Barber Pole. Among other reasons why it would have to be fake, there appears to be no provision for servicing the CRT neck area to make critical adjustments such as yoke, focus coil and ion trap position. As the technically-inclined are well aware, these adjustments require access to the tbe neck while it appears that the only way to reach the CRT is by pulling it out from the front on this "model", which certainly would make these adjustments extremely difficult.

[Chad Hauris]

There would have to be a seam in the "bonnet" that encloses the CRT...then you could lift the top part off and access the CRT adjustments.
Someone should try building one of these today, like one of us TV collectors...just use a 10" round CRT. Although, the woodworking would probably take a lot of work.

[jshorva65]

Originally posted by Chad Hauris
There would have to be a seam in the "bonnet" that encloses the CRT...then you could lift the top part off and access the CRT adjustments.
Someone should try building one of these today, like one of us TV collectors...just use a 10" round CRT. Although, the woodworking would probably take a lot of work.

Most definitely the woodworking would require amazing skill. Not the least of which would be required for arranging a means of securing and disengaging the top half of the CRT cover for access without any screws, latches or hinges being visible from the exterior. It's a great concept, though. Any master craftsmen among us who could accomplish this feat of engineering without investing hundreds of thousands of dollars in the making of a single set?

[prewtv]

Originally posted by jshorva65
Most definitely the woodworking would require amazing skill. Not the least of which would be required for arranging a means of securing and disengaging the top half of the CRT cover for access without any screws, latches or hinges being visible from the exterior. It's a great concept, though. Any master craftsmen among us who could accomplish this feat of engineering without investing hundreds of thousands of dollars in the making of a single set?

On my profile page is my site that shows I have started to clone this set.
I will be using a 10" electrostatic crt so no adjustments would be needed. The CRT housing started life as a CONGA drum. The table top is being made at a wood shop.
A plywood place in CALIF. has pre made 24" plywood tubes for sale. 27.5 tall 24 inch DIA.
AS a section is completed I will post to my site.
http://home.earthlink.net/~dchoinski/
http://www.aitwood.com/catalog_table..._cylinders.htm

[Steve K]

Prewtv:

I was just going to reply with a post stating that I would take on the challenge to build this set (after I complete a few other ongoing projects) but I then saw your post. What a great idea to use a drum and an electrostatic tube! I get back to Milwaukee a few times a year, too bad I couldn't work with you, I could build the base unit.

Steve

[jshorva65]

I will be using a 10" electrostatic crt so no adjustments would be needed.

Oops! I forgot about the few 10" electrostatic sets that were produced and that such tubes were excellent candidates for this application. Problem solved.

[bgadow]

Ha! I was, honestly, about to suggest a Congo drum!

This has the makings of quite a nice set.

[Chad Hauris]

Yes...had thought an electrostatic 10" CRT would work but didn't know there were any made. They must be fairly rare.

[prewtv]

Originally posted by Chad Hauris
Yes...had thought an electrostatic 10" CRT would work but didn't know there were any made. They must be fairly rare.

I guess they are rare but had good luck to find one on Ebay and no one was interested.
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2597143596

[prewtv]

Originally posted by Steve K
Prewtv:

I was just going to reply with a post stating that I would take on the challenge to build this set (after I complete a few other ongoing projects) but I then saw your post. What a great idea to use a drum and an electrostatic tube! I get back to Milwaukee a few times a year, too bad I couldn't work with you, I could build the base unit.

Steve

If you mean below the plywood tube, all the wood shops I have shown the PIC. to think there is no base, that the 4 legs just extend down below the tube?
If anyone thinks different would like to hear your ideas.
Thanks for the offer of help. I still have many items I need help on like the speaker grill area. The slats are rounded and on a round surface. I do not know how to do that and several wood shops had no answer.

[Steve K]

Pwretv:

By the base I meant the entire thing under the picture tube housing (cabinet, knobs, speaker, chassis and everything else).

Steve

[jshorva65]

The main things I'd be concerned about with a 10" electrostatic CRT is what its maximum anode voltage was, whether that voltage was enough to produce a bright raster on a 10" screen, and perhaps whether a 10" electrostatic tube with a post-deflection anode might be available (obviously a better choice for high-brightness displays from an engineering standpoint).

The old Tektronix scopes used an interesting circuit with an approx. 5" CRT where the cathode was at about -1250V and the Second Anode ran at about +8.5kV ... beam current being supplied from an approx. 10kV RF-type HV supply. The HV circuit, IIRC, consisted of a 12AU7 (Osc), 6AV5 (Pwr Amp) and five subminiature 5642 (Multiplier) tubes producing about 10kV from 100kHz RF.

[Steve McVoy]

The tube you bought on Ebay may be a 10HP4

http://www.earlytelevision.org/crtcollection.html