Quote:
Originally Posted by Rocket
Tom, did you do that fan inside of your HV cage? I know they make some smaller sized computer fans that I probably get to fit into that cage. What do you think of pulling off the heater power from focus tube, the connections are right there inside of the HV cage? I even thought about placing a normal sized PC fan under the chassis blowing up under the HV cage drawing in cool fresh air from below.
Anyone got any suggestions on doing grey/white scale setup without having a usable service/normal switch? I have the RCA book that explains how to do purity, convergence and the grey/white black/white setups. and I can tell its off a bit and I had to eye the blue/green/red screen pot controls since I move them all out of adjustment when I hit them with contact cleaner and lube. I may just have to wait until I get the new switch and get it installed.
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The customer's CTC16 I did I never installed a fan on the HV cage. Given HV arcing tendencies I would never install a fan on the inside of better than 95% of the sets I've seen... The CTC16 seems like an especially bad choice for an internal fan. I'd also strongly advise against powering the fan from a flyback winding... you will probably cause more extra current/heat in the flyback than the cooling the fan provides can balance....use the heater winding on the main 60Hz power transformer or a separate power supply for the fan (you could wire a wall wart in parallel with the main power transformer so the fan comes on with the TV power switch).
Blowing up from underneath is a valid approach. On my 21CT55 I glued a fan to a 3" PVC pipe section about 4" tall. The PVC sits on top of the cage over a factory vent hole that has a bulgy cover and extends that vent into a duct for the fan which pulls hot air out of the cage. I used the two power leads to tie down the fan/PVC assembly to the chassis so it won't be displaced in normal use.
You could pull a vertical yoke lead with brightness at min and adjust the screens or pull the vertical output tube... I've done it both ways in sets that lack a service switch by design.