Finally got around to cutting my old tubes out

Yeah id rather not do that, its a pain to fill them without a nozzle on a bottle

You can see it there, ive also glued the spacers in with Ultra Black so they wont move when i go to mount the tubes.

New leads fitted:

All glued in and sealed up:

Im good thanks mate and you?

Its not hard to remove the tubes, just cut down through the silicone all the way around the tube, and push it out from the front. Clean up the excess silicone from the housings, i put a dab of silicone on the 4 little spacers to hold them in, then run a bead around the inside of the housing, and around the outside of the tube, and drop it in. Move the tube around a bit and centre it in the housing, then push silicone down around the edges.

Fix up any scratches inside the housing or glycol with eat them. You must let the silicone cure for 24 hrs before you run your beads to mount the tubes, and id wait a few days before leak testing them. I used Permatex ULTRA BLACK, but id suggest you use something else that doesnt go off so quick.

I got a sim grade green, blue may not be worth the extra, but red and green will be.

Hi Case,

I recently refilled one housing of my 909 with fresh cooling liquid. You need about 600 mL per tube. You'll end up with a little rest. For 600 mL you need 201.6 g glycerol and 488.4 g ethylene glycol.
In the installation manual of the 909 is a safety data sheet. There stands it's a mix of ethylene glycol (ethan-1,2-diol) and glycerol (propan-1,2,3-triol) with specific gravity of 1,15. Temperature is unknown so I assume it's given for room temperature (20°C). Ethylene glycol density is 1.11 g/cm³ @20°C [1] and glycerol density is 1.26 g/cm³ @20°C [2]. Expect there is no volume contraction the glycerol makes about 26.67% of the density in the cooling liquid. So you get about 34 wt% of glycerol or 29 vol% of glycerol. There seems to be no additives since no other substances listed in the safety datasheet.

Is there a real difference between simulation grade and normal LUGs? I only aware of Mikado Seisakusho Co. Ltd. who produce new projection tubes (including LUGs). They only have one type of LUG in their portfolie. Would be interesting if there's a relativ inexpensiv way to get a sharper image on the tube's face.
My 909 has slaved more than ten thousands hour, the tubes (orginal Panasonics) also heavily used and scanlines at 1920x1080x60Hz on green/red is no problem. So I guess you don't need a blue "simulation grade" tube.

regards

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