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Old 07-20-2010, 11:23 PM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
swapped out some horz tubes (hot and driver) minor change. there were a couple out of spec resisotors the screen on the hot had a 47 that was 60+. it was in series with a 7 watt 4200ohm resistor. I am guessing the 47 was there to measure voltage drop to determine current since it gives a screen ma of 21 in the sams.

there was one cap that came off a winding from the fly that connected to the horz bias adj (which is a pot that goes to the HOT grid). I dont recall checking that cap.

there were a couple other 5% resistors that were out 20% again in the grid circuit of the HOT. the coupling cap from the horz osc to the HOT is a .0047 but its a disc so I really doubt its a problem, but again, I may just shot gun the parts in the horz circuit when I pull the chassis. I will leave the 5% caps (the clear tube ones) in the horz osc tank circuit since the horz freq seems fine. Will just replace the screen and cathode bypass caps.

there is a VDR in the bias circuit off the fly, but it has no specs so I cant check it. I assume this is used in the HV regulation, there is no shunt tube.
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