Kuba PAL PortaColor on E-Bay Germany - Videokarma.org TV - Video

jhalphen · #1 03-13-2009, 06:00 AM

Hi ! to All,

Many of us like the GE small color portable which paved the way to "color TV for everyone".

Well here's one on the "right side of the pond" for us, Euro early color TV fans. Saw this seldom found PAL Euro version under the Kuba name:

http://cgi.ebay.de/Kuba-Porta-Color-...1%7C240%3A1318

It's in Bielefeld, Germany, 4 days to go, some Euro collector please save it!

Not my auction of course,

too "big" for me

Best Regards

jhalphen
Paris/France

PS: if someone gets its running, it would be nice to see some pictures of the "Venetian Blind effect" of the Simple PAL decoder coping with a color signal having phase errors.

Sandy G · #2 03-13-2009, 06:07 AM

Yep, that's a Porta-Potty alright. And at 2 euros, looks like they get the same level of respect over there as they do here...

jhalphen · #3 03-13-2009, 06:11 AM

Hi Sandy,

Well, you're up early! (noon here).

I wanted to upload the pictures for AK user convenience, but the server says i'm 10Mb over my quota.

I would be sorry to delete all the pix from my old posts, is there a way to increase the allowable quota, pay $?

Thanks! for info

jhalphen
Paris/France

bgadow · #4 03-13-2009, 11:49 AM

I think I read right, that you can post in the member's gallery and link it from there. Or use another photo hosting service. (Grumpy was enouraging us to have them hosted here, though) I haven't tackled it yet, but I'm sure I'm also over limit so will have to learn. (I use photobucket on my ARF postings)

The one Kuba radio I had was pure junk; no surprise that they would be the one to offer this in Germany. Not that I would call the Portacolor pure junk! They are better built than that radio I had!

yagosaga · #5 03-17-2009, 02:01 PM

Quote:

Originally Posted by jhalphen

It's in Bielefeld, Germany, ..., some Euro collector please save it!

I have saved it, and I will report the restorting process here.

Kind regards,
Eckhard

Sandy G · #6 03-17-2009, 02:05 PM

Awrite, Eckhard !! Way to go !! Glad to see someone "In the Family" saved it !! I know it'll be safe now...(grin)

jhalphen · #7 03-17-2009, 05:57 PM

Hello Eckhard,

Good work, Congratulations!

Do you still have over the air PAL transmissions in your area of Germany? otherwise it's going to need a RF modulator or baseband video input.

Best Regards

jhalphen
Paris/France

yagosaga · #8 03-24-2009, 07:10 AM

Hello,

yesterday, I have picked up the Kuba Porta-color. It is in good condition, much better than other ones, I have seen. The emission of the 11SP22 is 0.4 mA on Blue, 0.38 mA on Green, and 0.38 mA on Red. This seems to be low, but keeping in mind that only a small screen has to be illuminated, this might be enough. What's your opinion?

The set is operated with a rainbow colour test generator and with Darryl Hock's World converter. In the rainbow, the red bar is missing. Green is yellow, and Cyan tends to purple. The burst signal, which is extracted from the chroma signal, is faulty. Where I should have only a small peak with the burst, I got a sawtooth signal.

Kind regards,
Eckhard

yagosaga · #9 03-24-2009, 04:20 PM

old_tv_nut · #10 03-24-2009, 10:25 PM

Quote:

Originally Posted by yagosaga

http://fernsehmuseum.net/kuba/img/Po..._colorbars.jpg

Meanwhile I have found one fault of the bad colour reproduction. The 7.8 KHz coil has a break, so there is no switch pulse input for the colour demodulator.

- Eckhard

Yes, my first thought was NTSC demodulator on PAL signal - the R-Y cancels out due to alternating phase of the signal without correcting phase switch in the R-Y demodulator.

yagosaga · #11 03-25-2009, 03:46 AM

Quote:

Originally Posted by old_tv_nut

Yes, my first thought was NTSC demodulator on PAL signal - the R-Y cancels out due to alternating phase of the signal without correcting phase switch in the R-Y demodulator.

It is Simple PAL. I.e. an NTSC demodulator with alternating R-Y signal. Here are the schematics:

http://fernsehmuseum.net/kuba/img/CK211Pschematics.jpg

Kind regards,
Eckhard

Robert Grant · #12 03-25-2009, 11:26 AM

Thanks for posting this schematic. I had always wondered how the R-Y was "switched" (on this set, I guess the phase of the 7.8 KHz osc forces the "wrong" diodes to cutoff the undesired output of the R-Y demod).

It must be in there, but I don't see how the set "knows" which lines are R-Y, and which are Y-R.

zenith2134 · #13 03-25-2009, 03:47 PM

Another one saved. Thanks for the pics; very cool.

Sandy G · #14 03-25-2009, 04:04 PM

Yeah, we kinda make fun of Porta-Colors, I know I'm guilty, but they still are pretty neat little sets. Fair amount of engineering went into 'em to make a color TV that small. And despite the fact that they were unashamedly built to a price, how many of 'em STILL work some 40-45 years later ?

zenith2134 · #15 03-25-2009, 04:13 PM

It always amazes me how they continue to make a color picture after all these years. And some were used heavily and abused a fair amount too.

Just look at it sitting there all smug, unaware that it should have been landfill decades ago...