CurtPalme.com Home Theater Forum

stefuel · Posted: Sun Jan 17, 2010 11:40 am Post subject:

OK, today's the day. I've told everyone to leave me the F alone so I can finish this up. I have two tubes to install followed by a couple of hours of carefull stig and flare tweaking and a complete ground up for three memory locations and rough color calibration. Fine tuning the color will be next weekend after the new tubes have settled in for a while. I'm really looking forward to seeing how this set's up with all three new Thomas tubes Thumbs Up

stefuel · Posted: Sun Jan 17, 2010 11:44 am Post subject:

Now we need to find a functional G-90 with torched tubes to modify with Thomas tubes. Hmmmm, a functional G-90 might be a little hard to find Laughing

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

stefuel · Posted: Sun Jan 17, 2010 1:03 pm Post subject:

stefuel · Posted: Sun Jan 17, 2010 5:59 pm Post subject:

Neck rest time. Besides just re-tubing, I have to check the CPU battery and clean up all the wiring. I may also shorten up all three HV leads as they are about a foot to long. It's a bitch to do if you are to short to do it standing on the floor and to tall if you are standing on a foot stool.

stefuel · Posted: Sun Jan 17, 2010 9:36 pm Post subject:

Been pulling my fugging hair out for a couple of hours. I said earlier that the red neck board is layed out different to allow for tube swing but I did not notice that the tube socket is wired a bit different and that there are multiple G1 pins to choose from. Pin 5 on the AmPro blue and green card is un-used. However, pin 5 on the red is a G1. That pin on the Thomas tube is G2. I'm glad I decided to slide the used green in the red position to test the red board. I unknowingly tied G1 and G2 together. I don't think I harmed the used tube as I slid on the extra modded blue card and it fired right up. I think I have it worked out now. I just have to rewire the G2, snip one more socket leg and jump G1 from pin 13 to pin 5 on the trace side.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Chip, on the thomas tube, pin 5 is a heater. Pin 4 is the G2.

EDIT, Ok a see how your counting them, not by the diagram but Physically.

use pin 3 then for the G1 instead of 13(12).

Athanasios

stefuel · Posted: Mon Jan 18, 2010 12:04 am Post subject:

OK having one small problem. What size resistor did you tell me to go from the arc surpressor to ground? I used 1/4 watt 1M resistors on all three. Now the new green is in. I have seen a couple of arcs in the tube neck and the 1/4 watt 1M sparks accross making a snap. I think you said 1/2 watt but all I had was 1/4 watt. Can I put 2 side by side and make 1/2 watt? The tube might just be clearing it's self of impurities. I'm tempted to leave it running and see if it settles down.
I had the same problem when I installed brand new tubes in my NEC. The blue is fine and the red is also just the green.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Chip, not sure of the wattage. I used a 1 watt I had lying around.
If you put two in parallel it will reduce the ohm vale by 2.

I think it's just the tube clearing out some crap from shipping.

Athanasios

stefuel · Posted: Mon Jan 18, 2010 1:56 am Post subject:

The snapping does seem to be less frequent now. It doesn't make me feel all warm and fuzzy with my hand up there doing stig and flare. It started doing it about twice a minute. Now it's down to once every ten minutes or so.
Strange that it's only the new green. Having something to eat now then back to work on beam focus. I'm only going to get one memory location done tonight. That red board set me back a couple of hours.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Thats funny its the green, The used green i first tested also snaped and had the beautiful plasma show in the tube neck, you should see how it looks if you tapped it while it was arcing Very Happy

Athansios

stefuel · Posted: Sat Jan 23, 2010 4:11 am Post subject:

I no longer think it's the tubes fault. I came home tonight and fired up the PJ. Again I got a snap from the 1M resistor. I pulled both the green and blue neck boards to double check my work. Both boards are modded identical. I re-installed the boards but on different tubes and the snap followed the board. I'll have to go through my stock and see If I have another g or b neckboard to mod or resolve the streaking in the first one. No sense in calibrating until all the bugs are worked out.
The red which was giving me head with braces on is working perfectly. I just need to get one more neckboard to work correctly and all will be well with the world.

These tubes are for sure sharper than LCP's. I don't know how well they stack up to LUG's

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Chip, try potting around your work on the one that is snapping. use Silicon, on one of mine the solder work was too close to another line ( I think the G2) and it arced over. it might be that simple.

oh and Chip go help this guy out on AVS...

http://www.avsforum.com/avs-vb/showthread.php?t=1219215

Athanasios

CRT_Ben · Joined: 28 Aug 2006 Posts: 1684 Location: Northern Virginia

Chip I ended up potting my modded neckboards with hot glue, because my G2 line was arcing just like Tom's was.

stefuel · Posted: Sat Jan 23, 2010 1:16 pm Post subject:

I just got home from work. I have a little bit of house work to do, then a hair cut. Then I'll have to choose between chasing the old lady or play with the projector.

**AnalogRocks** · Posted: Sat Jan 23, 2010 1:42 pm Post subject:

stefuel · Posted: Sat Jan 23, 2010 7:02 pm Post subject:

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

stefuel · Posted: Sun Jan 24, 2010 12:51 pm Post subject:

**AnalogRocks** · Posted: Sun Jan 24, 2010 6:48 pm Post subject:

Interesting info on the setup. I'll have to look for that