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  #1  
Old 02-21-2011, 01:09 PM
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Default Amplifone Tube Swap ...
I am swapping my old Amp tube with a NOS one. I've removed the rings, the yoke, and I have pulled the tube from the cabinet. I have a few questions though.

There is tape around the neck of the old tube. See the first pic. Do I need to put a similar type of tape on the new tube?

There is tape inside the yoke. See pics 2 and 3. Should I leave it there or remove it?

The yoke windings are dirty. Would it hurt to wipe down the windings with a dry rag?

http://cid-4127ea3a33b50049.office.l.../tubeswap1.jpg
http://cid-4127ea3a33b50049.office.l.../tubeswap2.jpg
http://cid-4127ea3a33b50049.office.l.../tubeswap3.jpg
http://cid-4127ea3a33b50049.office.l.../tubeswap4.jpg

Thanks,
Kent
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Old 02-21-2011, 01:18 PM
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Do you mean the strips here:



Those are the strips to be used to do the edge convergence
(see my video about doing this, but this is the LAST step !: http://www.youtube.com/watch?v=QYB1L8AIeq4)

The tape on the yoke I would definitely leave, it looks like it's holding the wiring in place !!!

Please post everything about your swap here, I'm going to have to swap a 25" tube on an Amplifone (yikes !) soon !!
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Old 02-21-2011, 01:28 PM
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no ... do you see the white tape wrapped around the neck? ... that is what I am referring to ...

Kent
Last edited by kentmurphy; 02-21-2011 at 01:37 PM.
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Old 02-21-2011, 01:31 PM
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ooops ... just read your whole response ... the white tape is on the old tube ... not certain if I need it on the new one ....
Last edited by kentmurphy; 02-21-2011 at 01:37 PM.
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Old 02-21-2011, 01:34 PM
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I really have no clue about that tape around the neck....anyone else ??
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Old 02-21-2011, 01:38 PM
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Quote:
Originally Posted by Level42 View Post
I really have no clue about that tape around the neck....anyone else ??
When I swapped the tube in a 6100 it had some tape like that under the yoke. I don't know if it is required or not, but it seems to be a nice buffer for tightening the yoke enough to not move while helping prevent you from cracking the neck in doing so. So I put tape on the new one. I had some really similar bandage tape that I used.
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Old 02-21-2011, 01:44 PM
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thanks guys ... note, the same tape is also inside the yoke ... any thoughts on that?

Kent
Last edited by kentmurphy; 02-21-2011 at 01:48 PM.
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Old 02-21-2011, 01:50 PM
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Like I mentioned in the first reply:

It looks like that tape is also holding the wiring in place. Definitely leave it there ! (Also for the reason VectorJunkie mentions...)

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Old 02-21-2011, 01:58 PM
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ok ... thanks ... got to read more carefully ... I just discovered that the tape is more than tape ... under each strip is what appears to be a magnet ... I'll post a pic in a second ...

Kent
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Old 02-21-2011, 02:01 PM
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O wow, that's very interesting !!!
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