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Old 01-21-2004, 06:07 AM
Chad Hauris's Avatar
Chad Hauris Chad Hauris is offline
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Join Date: May 2003
Location: West Texas
Posts: 2,085
Doug, thanks a lot for your detailed tips.

Last night I found a 6.3v 250 ma fuse lamp and put it in the cathode fuse clip and left it there. I adjusted the horiz eff coil for minimum lamp brightness (I had to turn the slug several turns into the coil). Also adjusted the horiz. centering control. I let it run for several hours and the burning smell is mostly gone, it is now just a usual smell of hot tubes. Flyback case feels a lot cooler now too. I think the lamp also helps to reduce cathode current by acting as a resistor. A severe overload should blow the lamp.

I measured the horiz. output screen grid voltage, it is 135 v.
and the negative grid voltage is -53 volts which are exactly right according to the schematic. If the cap and resistor that you found are bad, would they cause these voltages to be off?

That cathode current meter is amazing...never saw such a thing!

Last edited by Chad Hauris; 01-21-2004 at 08:10 AM.
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