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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sat May 11, 2013 2:32 pm Post subject: Picture tube |
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Replacing the red tube in an Ampro 4600 .Bought the tube from Curt. Unfortunately life got in the way of fun for awhile so here I am putting the coils and magnets, etc on and what I have for a model is the other 2 tubes. The positions are different on both blue and green so (scratching head) I'm hoping for any advice.
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When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat May 11, 2013 2:35 pm Post subject: |
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I've read this three times, and don't understand what you're talking about. 
I'm not sure what you mean? Pix, or can you explain?
Thanks!
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sat May 11, 2013 4:03 pm Post subject: |
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The three collars that slip onto the tube neck. The order is no problem but rotationally and the spacing to the astig magnets.?I know they have to be adjusted eventually but does the starting position matter much ?
And don't you sleep in on Saturdays Curt?
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When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat May 11, 2013 4:30 pm Post subject: |
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Oh gotcha! No, just orient them roughly to the other two tubes, and you'll be fine.
Sleep? WHat's that? 
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat May 11, 2013 10:51 pm Post subject: |
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| Curt Palme wrote: |
Sleep? WHat's that? |
Ask all your girlfriends 
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sun May 12, 2013 2:39 am Post subject: |
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| CasetheCorvetteman wrote: | | Curt Palme wrote: |
Sleep? WHat's that? |
Ask all your girlfriends |
 I couldn't resist
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sun May 12, 2013 8:24 am Post subject: |
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| 416ray4538 wrote: | The three collars that slip onto the tube neck. The order is no problem but rotationally and the spacing to the astig magnets.?I know they have to be adjusted eventually but does the starting position matter much ?
And don't you sleep in on Saturdays Curt? |
Rotation should be much the same but the focus coil distance from the astig magnets may vary you will need to find the spot where the focus is sharpest.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Mon May 20, 2013 3:19 pm Post subject: |
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The red tube is in. Wires connected. Tube and neck board checked out by Curt (Thanks). The tube and board visited Curt because I can't get the tube to light up.
No bent pins. 930 VDC on the white wire where it solders to the neck board. Green lights up when the little red G2 knob is turned slowly. Red does not even when turned fully. 
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When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon May 20, 2013 4:04 pm Post subject: |
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Is the heater glowing at the back of the red tube?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon May 20, 2013 4:09 pm Post subject: |
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Oh yeah, you don't have the red turned off at the remote, do you?
Also check the red sub brightness and sub contrast. 1 or both may be turned way down for red.
No raster with G2 up full is not uncommon with red sub brightness turned down.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Mon May 20, 2013 6:29 pm Post subject: |
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Sorry , when I was listing symptoms I should have mentioned that there is a glow from the bottom of the tube. I'm working out of town for the next week so I will check your suggestions next weekend.
Thanks
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Mon May 20, 2013 11:02 pm Post subject: |
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just going over an old post. (Mon , Nov 28, 2011, 12:40 AM) thought i'd walk through in my head and then do it when I get home.
All 3 tubes off at the remote.
G2 up till raster glows.
Down gently till it disappears.
Turn on but with no signal, Brightness at 50, contrast at 20. Then set sub-brightness the same procedure as G2 was adjusted: Up till raster is visible, then down till it's not.
Are the G2 and sub-bright interactive? ie) one changes the other? Should I be asking for a start point for sub-bright before adjusting G2?
A short epistle on what I'm trying to do sure would be fun.
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When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue May 21, 2013 1:52 am Post subject: |
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| 416ray4538 wrote: | just going over an old post. (Mon , Nov 28, 2011, 12:40 AM) thought i'd walk through in my head and then do it when I get home.
All 3 tubes off at the remote.
G2 up till raster glows.
Down gently till it disappears.
Turn on but with no signal, Brightness at 50, contrast at 20. Then set sub-brightness the same procedure as G2 was adjusted: Up till raster is visible, then down till it's not.
Are the G2 and sub-bright interactive? ie) one changes the other? Should I be asking for a start point for sub-bright before adjusting G2?
A short epistle on what I'm trying to do sure would be fun. |
Ha, looks like something I wrote up here some years ago.
When the tubes are turned off the brightness control does not affect the G2. But, sometimes if a tube doesn't have super great emission you won't get a raster even at full G2. If this ends up being your case then you can use Scott's method.
With the tubes on, set master and sub brightness at 50%. Master contrast is lowered so you can look into the lenses. Then adjust the G2's for raster to just disappear. At this point your G2's, sub brightness and master brightness are set. You just have to do your sub contrast and master contrast.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Sun Aug 25, 2013 5:32 pm Post subject: |
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Still no glow
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When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Tue Aug 27, 2013 12:34 am Post subject: |
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This started with a dead battery. Once the battery was replaced there were some lines on the red only. In swapping boards one of the pins on the back of the red tube broke. Replaced tube.
Tube has been checked and is good.
Neck board likewise
Voltage to neck board typical
Tube heater glows
Face of tube doesn't glow
What am I missing?
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Wed Aug 28, 2013 3:08 pm Post subject: |
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Is here any reason I can't swap the red and green tube Or the cables to the neck board one at a time to see if the problem stays or moves?
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Wed Aug 28, 2013 9:27 pm Post subject: |
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| 416ray4538 wrote: | | Is here any reason I can't swap the red and green tube Or the cables to the neck board one at a time to see if the problem stays or moves? |
Swap the cables and see if the problem follows
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crt king of black
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Wed Aug 28, 2013 11:48 pm Post subject: |
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The white G2 cable isn't long enough. Can I assume that G2 is common and constant on the mother board?
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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416ray4538
Joined: 14 Jul 2009
Posts: 517
Location: near Toronto Ont
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| Posted: Thu Aug 29, 2013 12:00 am Post subject: |
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Most of the cables aren't long enough.
I'll swap the tubes green for red.
_________________
When the first clock was invented, how did they know what time to set it to?
No point being pessimistic; it probably would't work anyway.
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mx83toy
Joined: 14 Dec 2012
Posts: 322
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| Posted: Thu Aug 29, 2013 1:56 am Post subject: |
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| the big E wrote: | | CasetheCorvetteman wrote: | | Curt Palme wrote: |
Sleep? WHat's that? |
Ask all your girlfriends |
I couldn't resist |
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