Smallest Color Crt,disassembled,working.

[rca2000]

With a flash, it just reflects and washes out the picture totally. I tried to get a good picture.

maybe, If I place the unit on a black surface, and THEN remove that little mirror, I could get a good flash picture. I'll try-- I want you to see what I am talking about, with the photocells in front of the CRT.

[rca2000]

I tried with a flash, lying the unit on the black bag the camera came in-- a little better, perhaps. Maybe someone wiht a photoshop program can ""clean it up" a bit(I don't have photoshop)

If you look at the front of the crt, that little yellow-orange thing looks like a photocell, and there is another black one next to it. This HAS to be how the index ckt operates!!

While I am at it, the item behind the color viewfinder is an EVF (bw) from a 1979 RCA cc-004 camera.

[Richard D]

Hi Jack, You are correct. Upon closer examination I found the two devices in the bottom of the viewfinder. One looks like a photocell the other a photodiode or transistor. I noticed that if I block off the photocell looking one the colors all shift and red is green or blue or something else. If I block both of them it goes to a perfect black & white picture with real blacks and pure whites. When playing a B&W tape it looks better in I cover them. Live and learn. Thanks for the lesson. But why go to all the trouble when Panasonic was making conventional 1.5 inch CRTs.? It says RCA but I bet it was made by JVC or Panasonic.

[rca2000]

Seeing all of that circuitry in both of our color EVF's, I would gather that a normal, in-line type tube like the one in the panasonic sets would have been simpler to implement in the EVF. All of that extra circuitry (including several SMD chips)to guide the beam with those photocells and such, when they could have used Panasonics crt and a normal circuit!!

BTW- it is a HITACHI tube, as I removed mine (temporarilly) from the sleeve. It says "Hitachi 6289" or something like that. ( I think the whole camera may be made by them!!)

Has ANYONE else EVER seen a Crt like this, using external guidance from the SCREEN?? The Sony vidimagic uses photocells, from the REAR of the tube and a seperate, green phospor for indexing.


BUT- the unusual design DOES make for som fun "messing around"!!

[rca2000]

PERHAPS(and maybe someone can help me here) a shadow-mask tube would had looked too coarse and grainy up that close to the eye, and that had to go another route. After all, color LCD-s often look grainy in VF's today. Maybe the panasonic tube was just not sharp enough at that close eye distance, or such.

But STILL -- LOOK at ALL of this stuff in here!! (on the one board, the white squares indicate SMD chips underneath, and there is a couple of others on the top board, too!!)

I do feel it would be difficult to use this in a normal color tv set, due to the external indexing of the CRT.

[Richard D]

Just for the heck of it I used a 3X eye loupe and looked at the Panasonic, and at about the same magnifacation it looked better than the Viewfinder. When I backed up the loupe and the image was magnified a lot more then you could see each set of pixels changing color and brightness. Can 7.5 KV. produce x-rays? I was using the ct-101 with the broken and pieces missing cabinet, I can just imagine holding an X-ray tube up against my right eye.
Richard.

[wiseguy]

OK,this test set is next to a sony kv-4000 ,both are about 2.6",I took a peek inside the removable leader monitor,looks like matsushita made the CRT,but i cant find a label for the electrostatic CRT inside the waveform monitor.just thought you all would be interested.LOL..
terry

[kx250rider]

Panasonic did have a 3" (if I recall size correctly) color set that looked an awful lot like that monitor! I am trying to remember the model; CT-3311? I had one.

Charles

[Richard D]

Hi Charles, Yes you are correct. The model is the CT-3311 with a 3 inch diagonal screen. I have one in great condition and another that was put in a shoe box with no filler and shipped accross the country, so you can imagine what happened to the CRT. I think Mick Jagger summed it up best with the song, SHATTERED. Anyone need CT-3311 parts, or anyone have a ct-3311 CRT on a shelf somewhere?

[Sandy G]

I had one of those CT-3311s that got fried in the Great Lightning Storm of 2001 that creamed a lot of my gear. It was pristine. I got another one from a fella who made it work for its living, he was a video engineer, whatever the hell THAT is, it is NOT pristine. I think I saved the CRT out of the other one; yep, got it in my fat, greasy hand. It is an 85XB22, & I clipped the white wire lead coming off the side of it, but otherwise it's intact. You want it, it's yours. PM me yr addy & it'll be on its way 1st of the week.

[fujifrontier]

This is fascinating!! Now i want one!

What do you mean by "indexing?"

I have a Sony vidimagic on the way by the end of next week BTW