Ion Traps

[Eric H]

I junked a 630 chassis, I'll see if I have the trap from it tomorrow.

[vts1134]

Thanks Eric.
I disassembled the trap this morning and found that the smaller of the two coils is still intact and reads 3ohms. The break is in the larger coil.

[old_coot88]

How is the focus range now while using the pm trap?

[vts1134]

For those who don't know I was trouble shooting my focus control in relation brightness issue with Bill in some private messages.

Originally Posted by old_coot88

How is the focus range now while using the pm trap?

I'll check on it tonight and let you know. Even though I was 70 ohms low on my bleeder resistor which would have increased current flow, half of that was made back up do to my ion trap being open. I should have read 56 ohms across the trap instead of the normal 21.913 ohms with a good ion trap making me only 34 ohms low on the entire circuit (assuming all other components are on spec).

[vts1134]

The focus is good with the pm trap. I have to turn the focus coil to a strange angle because the trap is pulling the beam in a different angle. I think once I get a replacement electromagnetic trap I'll be in business.
Any one out there have a spare?

[old_coot88]

Originally Posted by vts1134

The focus is good with the pm trap. I have to turn the focus coil to a strange angle because the trap is pulling the beam in a different angle. I think once I get a replacement electromagnetic trap I'll be in business.

What happens if you flip it around?
Are you using the pm unit with the EM one still in place? If so, residual magnetism in it could be throwing things off a little.
Does the EM unit have solder lugs where the leads attach? If so, it is likely you can spot the break, because it'll usually occur right where the fine coil wire joins the lug.

[vts1134]

What is the wire on the coil coated with? I found a break close to the end of the coil but I can't get continuity on the wire. I've tried melting it with fire and holding probe leads onto what looks like bare wire to me and it won't conduct. Is there something else I need to get off of the wire that can't be burned off? If I cant figure out how to expose the conductor in that wire and that point is the only break then I think I'll be able to repair the trap and be in business.