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Author Topic: Dark Dull Colors on my k7000  (Read 443 times)

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Zuul86

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Dark Dull Colors on my k7000
« on: January 27, 2017, 08:45:55 am »
I recently re-caped, and replaced the flyback on my WG k7000.  The colors are still very dark and dull.  I can't turn up the brightness higher or the picture starts becoming grey and white.  I'm not sure what to do next.  See videos and pictures below.  Any suggestions?

https://goo.gl/photos/knNBLvyJ8xbBP7qi7
https://goo.gl/photos/U4hNenEzsxt55f4e7
https://goo.gl/photos/xGwoMQafFWdEF95U8

Zuul86

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Re: Dark Dull Colors on my k7000
« Reply #1 on: January 27, 2017, 11:42:18 am »
Yeah I've been doing that.  I turned up the brightness on the flyback has high as I could without the raster lines showing.  I also have been playing with brightness and contrast on the breakout board but I'm not happy with how it looks.  I doesn't look as good as other CRTs of the same era.

Zuul86

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Re: Dark Dull Colors on my k7000
« Reply #2 on: January 27, 2017, 07:24:29 pm »
That is a nice doc on monitor calibration.  Unfortunately I'm still not able to make the colors brighten up.

Zuul86

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Re: Dark Dull Colors on my k7000
« Reply #3 on: January 28, 2017, 11:17:57 am »
Yeah that's probably my next option.  I'll have to find someone who does that in Milwaukee.

Zuul86

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Re: Dark Dull Colors on my k7000
« Reply #4 on: February 03, 2017, 10:49:31 am »
So I bought a tube rejuvinator but I'm not sure if it's going to work.  It's a B & K Model 400 Cathode Rejuvenator Tester.  I have a Zenith  g-a63adg25x tube.  I'm not sure what the tube type is to setup the tester.  Advice?

Manual - https://archive.org/details/bk_440_cathode_rejuvenator

lilshawn

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Re: Dark Dull Colors on my k7000
« Reply #5 on: February 03, 2017, 03:15:14 pm »
almost all color tubes are 6.3 volts on the heater and a 50 volt grid voltage. that thing you got there is a real oldie made for b/w tubes.

it might still work, but you'd have to break out the cable and hook it up manually and do each gun separately.

ed12

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Re: Dark Dull Colors on my k7000
« Reply #6 on: February 03, 2017, 04:15:47 pm »
holy crap
i do not think a rejuv will help that jug
please note the lack of the main gun >green<

ed
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Zuul86

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Re: Dark Dull Colors on my k7000
« Reply #7 on: February 03, 2017, 09:53:00 pm »
I do get green.  When I run the screen test on MK II I see red, blue, and green.  Whites are very grey, and the colors dull.

ed12

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Re: Dark Dull Colors on my k7000
« Reply #8 on: February 04, 2017, 01:12:34 am »
if u are getting grey ? from that jug ?
then it is gunned down
u might get it with a re-juv..
is it a zenith ? >tube< ?

ed
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Ken Layton

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Re: Dark Dull Colors on my k7000
« Reply #9 on: February 04, 2017, 01:38:34 am »
So I bought a tube rejuvinator but I'm not sure if it's going to work.  It's a B & K Model 400 Cathode Rejuvenator Tester.  I have a Zenith  g-a63adg25x tube.  I'm not sure what the tube type is to setup the tester.  Advice?

Manual - https://archive.org/details/bk_440_cathode_rejuvenator

That model is 50 years old! Belongs in a museum.

The oldest B & K rejuvenator model still worth a darn is the 467. If you can find an updated model 466, that will work too.

Zuul86

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Re: Dark Dull Colors on my k7000
« Reply #10 on: February 04, 2017, 07:48:26 pm »
New development!  I didn't look closely enough when I got this cabinet.  The the wire plug with the ground and composite sync was shifted over by one.  So the ground was hooked up to nothing, and the sync was hooked up to ground. The picture is now bright with no interference.

  
 

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