http://cgi.ebay.com/1954-RCA-CT-100-first-Color-set-working-15GP22-/330572134392?pt=LH_DefaultDomain_0&hash=item4cf7a277f8

Here's another one for 3K.

Hope Sandy doesn't mind-

Homina homina homina! lol

Ho Hum, another CT-100, how about something really rare: http://cgi.ebay.com/super-rare-1951-Prototype-Color-TV-Developmental-CRT-/330572137613?pt=LH_DefaultDomain_0&hash=item4cf7a2848d

:yes:

WOW!!! way out of my league, just WOW.

Really? I can't believe he's going to sell that! Someone should buy it, and donate it to the ETF!

Ps: Someone test that crt!!!

simply amazing. I wonder where Harry unearthed that miracle?

I think someone should resore and post pics!!!!!!!!!!!!!!!!

Too much money

:tears::yes::drool:

simply amazing. I wonder where Harry unearthed that miracle?

Maybe Harry Poster is really Harry Potter. :scratch2: Only one letter different.

Harry Poster and the Chamber of Vacuum?

Even though the filiments have continuity, I would not count on that crt having a good vacuum. It is possible, but I would guess the odds are very slim at best.

Someone needs to hit that crt neck with a high voltage tesla coil to see if there is a purple glow. That is the best test to see if it is holding vacuum.

Even though the filiments have continuity, I would not count on that crt having a good vacuum. It is possible, but I would guess the odds are very slim at best.

Someone needs to hit that crt neck with a high voltage tesla coil to see if there is a purple glow. That is the best test to see if it is holding vacuum.

Hear, hear....

I take it you're not interested, Bob?

Realistically speaking, how many 'good' 15GP22 kine's are left out there in the wild? I'm guessing not many at all (!)

the rest is in great shape though & well worth the cash.

...

Even though the filiments have continuity, I would not count on that crt having a good vacuum.

You're referring to the prototype, right? Even if the set could be restored (it's incomplete) could it ever produce a color picture? This chassis appears to be from the early evolutionary period of NTSC.

I'm wondering the same thing...

I can program my converters for whatever standard this set uses. I currently generate signals for the British experimental 405 NTSC and SECAM, so whether this set uses some form of early NTSC or dot sequential, there would not be a problem generating a signal for the set if it ever becomes operational.

Darryl

Hope Sandy doesn't mind-

Homina homina homina! lol

Not ay all...You beat me to it ! (grin)

Mr. Galanter

Could you or someone else point me to the description of this high-voltage tesla-coil test you mentioned? I'm curious as to how it works and how it's done.

Drool, drool, drool....(opens wallet big cloud of dust appears), sigh.

At least I can dream.

Tom C.

It could be a prototype of the receiver RCA demo'ed to the FCC in December 1950. In those days they were using a circuit that sampled the three color primaries one at a time at 3.58 mc. Would be a bear to reverse-engineer and restore. But...

Pete

Does that mean it had seperate inputs for the 3 primary colors, or received a signal containing color info for all 3?

Holy crikey!!!!! It is AMAZING what shows up on Ebay, I don't think I've even seen any photos of such a prototype on the ETF site, so this is a new discovery!!!!! I hope ETF will pounce on that prototype and have it proudly on display at the musuem!!!!! :D

The museum is run by donation, but you never know... Maybe Steve has been saving his pennies for just such an occasion.

too risky all around. I bet they both don't sell.

Why not? A CT-100 with a good tube should easily be worth that much.

Does that mean it had separate inputs for the 3 primary colors, or received a signal containing color info for all 3?Like today, it was a single carrier system containing luminance, chroma, and sync. However, if this is a 1950 set, that would be before Philco introduced quadrature modulation to the mix. The set would include bypassed monochrome circuitry, but probably not constant luminance developed by Hazeltine; it probably used the RCA system that sampled the R, G, and B at 120 degree intervals.

Again, the set would have to be reversed engineered and its expected transmission system reproduced by Darryl's magic.

Pete

Hopefully the museum gets this to restore. Even if set was half the price wouldn't be interested, the shipping charges have gone up past several years. I sure RACS could do something w/ crt. The seller would be wise to lower price if doesn't sell. maybe someone would bid if complete? Does museum have schematic of power supply? Has got to be at least several hundred dollars to duplicate a large enough transformer supply to power set.

CT-100 went for $5,200.

Which seems reasonable to me.

Same here, considering the good CRT. The getters looked really good to me, which would suggest the tube has no leaks whatsoever. Anyone here win it?

The prototype sold for $3650.

Phil Nelson
http://antiqueradio.org/index.html