OP
OP
Bullwinkle
Member
Indeed it does not connect to anything. thanks.
Tube replacements - question on ohms
- Thread starter Bullwinkle
- Start date
Indeed it does not connect to anything. thanks.
You're welcome! Good luck with the swap. Post pictures!
OP
OP
Bullwinkle
Member
Will do. It actually looks like I'll be using a WG chassis (I think), but I cant figure out which one it is but it does have a 10pin socket (pic below)
Bottom of the board shows DBQ 2061433-040
The old tube I'm replacing doesnt have any helpful markings so I can't simply look it up on the list
Does the chassis look like WG? The tube does have a WG serial # on it.
Also, I thought I read that it's better to use the convergence rings from the tube that I'm putting in place (instead of the one that's going away). The sleeve they sit on is attached to the yoke (one big piece), so I'd have to take them off that and place them onto the ring holder of the outgoing yoke...or should I just try the rings from the outgoing yoke?
thanks,
-tom
Bottom of the board shows DBQ 2061433-040
The old tube I'm replacing doesnt have any helpful markings so I can't simply look it up on the list
Does the chassis look like WG? The tube does have a WG serial # on it.
Also, I thought I read that it's better to use the convergence rings from the tube that I'm putting in place (instead of the one that's going away). The sleeve they sit on is attached to the yoke (one big piece), so I'd have to take them off that and place them onto the ring holder of the outgoing yoke...or should I just try the rings from the outgoing yoke?
thanks,
-tom
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That's a 4900 series. You will definitely need to swap yokes with that board too. The 4900 used a yoke that ohms out around 35 on the vertical winding, which is totally different than the G07 AND the K7000. It's not a low OR high impedance, it's like right in the middle.
When you go to swap yokes on that one, be on the lookout for magnets under the yoke when you pull it. I had 3 magnets under mine (no doubt used for final convergence adjustments) that I had to re-attach with some tape. The old tape had disintegrated, allowing the magnets to fall out when the yoke was slid off the tube. Luckily they left impressions in the windings so I could tell where they had been.
When you go to swap yokes on that one, be on the lookout for magnets under the yoke when you pull it. I had 3 magnets under mine (no doubt used for final convergence adjustments) that I had to re-attach with some tape. The old tape had disintegrated, allowing the magnets to fall out when the yoke was slid off the tube. Luckily they left impressions in the windings so I could tell where they had been.
OP
OP
Bullwinkle
Member
I saw exactly what you were talking about. mine were taped to long thin sticks of paper. I will place them on the new tube. Thanks. ..and yep.. it ohm'd out at 35+ohms on the vertical
Make sure you don't use tape that is conductive at all. I used black electrical tape. Better to tape the magnets to the coils of the inside of the yoke (where the depressions were) than to the new tube itself. That way, if you need to make minor position adjustments to square up your picture by turning your yoke, your magnets will move with the yoke and not stay in place on the tube. That will keep your convergence in line.
Got it? Or was that too much of a run on sentence??
Got it? Or was that too much of a run on sentence??
OP
OP
Bullwinkle
Member
Make sure you don't use tape that is conductive at all. I used black electrical tape. Better to tape the magnets to the coils of the inside of the yoke (where the depressions were) than to the new tube itself. That way, if you need to make minor position adjustments to square up your picture by turning your yoke, your magnets will move with the yoke and not stay in place on the tube. That will keep your convergence in line.
Got it? Or was that too much of a run on sentence??
10-4 ... going to go attach the magnets now. thanks
