This is driving me crazy. First off, these are the fuses for the X & Y circuits, not the power circuits. They are the 3 amp normal blow fuses on the deflection board. I shall summarize so please read carefully. I have gone completely thru the deflection board and checked all components. Yes, it took a long time. All cold solder joints fixed. LV2000 installed. This was a tested and working deflection board till one day the monitor quit on a Tempest. All the bottle cap transistors are fine. Yes, I do know how to test them.
Every time I try to power up the monitor using a known good Tempest board set, I blow the fuses at these locations. I have tried the monitor and 3 different board sets in 3 different cabinets. I decided to try a different deflection board to see if it might work but the same result. This one does not have the LV mod but that shouldn't matter anyway. AT NO TIME is the HV section connected so we can keep that completely out of the loop here. If I hook up the large connector only all is well. I have good 26V on the LV 2000. When I hook up the power transistors and deflection circuits and yoke and neckboard, KABLOOEY. The fuses blow in about 2 seconds. I am thinking that the yoke may be shorted somehow but would like to know the definitive way to test it. Mind you this monitor has no burn on it and the tube looks like it just came from the factory. However, the yoke mounting looks like it was done by a guy on his first day at work so I don't know if this is a factory install or somebody bought a new tube and mounted the yoke on it a few years back. I know the monitor came from Callan in Houston but have not contacted him as I doubt he will remember the providence of a tube from about 6 - 8 years ago. But I digress...........
I checked the resistance of the 2 different windings on the yoke and they are close to another monitor I have here in the garage.
1. Do we know the "values" the 6100 yoke is supposed to put out?
2. Is there a good way to test the yoke that I don't know about?
3. Can I put a bare yoke on a piece of wood and plug it into the deflection board and power up the circuit without blowing anything? That is, no tube?
4. What order would you plug in the power and deflection transistors to test each circuit?
5. Does the yoke have to be plugged in to test the deflection board or will I cause Magic Smoke to leak out of something if I leave the yoke unplugged?
Some of these questions may seem pretty basic but that is the kind of guy I am. Very basic. Until then, I'm going to try another monitor with the same boardset to see WTF is going on. I'm running out of 3 amp fuses.
Every time I try to power up the monitor using a known good Tempest board set, I blow the fuses at these locations. I have tried the monitor and 3 different board sets in 3 different cabinets. I decided to try a different deflection board to see if it might work but the same result. This one does not have the LV mod but that shouldn't matter anyway. AT NO TIME is the HV section connected so we can keep that completely out of the loop here. If I hook up the large connector only all is well. I have good 26V on the LV 2000. When I hook up the power transistors and deflection circuits and yoke and neckboard, KABLOOEY. The fuses blow in about 2 seconds. I am thinking that the yoke may be shorted somehow but would like to know the definitive way to test it. Mind you this monitor has no burn on it and the tube looks like it just came from the factory. However, the yoke mounting looks like it was done by a guy on his first day at work so I don't know if this is a factory install or somebody bought a new tube and mounted the yoke on it a few years back. I know the monitor came from Callan in Houston but have not contacted him as I doubt he will remember the providence of a tube from about 6 - 8 years ago. But I digress...........
I checked the resistance of the 2 different windings on the yoke and they are close to another monitor I have here in the garage.
1. Do we know the "values" the 6100 yoke is supposed to put out?
2. Is there a good way to test the yoke that I don't know about?
3. Can I put a bare yoke on a piece of wood and plug it into the deflection board and power up the circuit without blowing anything? That is, no tube?
4. What order would you plug in the power and deflection transistors to test each circuit?
5. Does the yoke have to be plugged in to test the deflection board or will I cause Magic Smoke to leak out of something if I leave the yoke unplugged?
Some of these questions may seem pretty basic but that is the kind of guy I am. Very basic. Until then, I'm going to try another monitor with the same boardset to see WTF is going on. I'm running out of 3 amp fuses.

