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#1
07-25-2013, 07:45 AM
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16TP4 - gun alignment
See http://i.imgur.com/TQaP0Qq.jpg
This tube seems to be fairly similar to the 16KP4 - no aluminization, almost the same specs. Looking at the gun assembly, it whole of it is tilted in the base by some amount. I thought that ion-trapping was done in only part of the gun assembly, not with the whole - but what the heck to I know. Does it look right? 
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#2
07-25-2013, 08:34 AM
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Looks like sloppy alignment at the factory. I have seen the "bent guns" you are talking about. Does this tube work?
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#3
07-25-2013, 12:16 PM
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I've seen tubes like that before, pretty sure it's for Ion trapping.
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#4
07-25-2013, 06:12 PM
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I have a 17RP4 that arrived here looking like that. I thought it was dammaged in shipping. I installed it, set the ion trap, GREAT PICTURE...
 Turns out some guns were made that way. Unless it tests bad, i wouldnt worry about it  SR
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#5
07-25-2013, 09:48 PM
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its ok , they where made that way .
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#6
07-25-2013, 10:23 PM
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Yes, the gun was intentionally installed that way. It needs an ion trap or "beam bender" to function properly.
The ion trap is used to pull the electron beam back on-axis, while the heavier ions shoot harmlessly into the inside walls of the tube.
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#7
07-25-2013, 10:27 PM
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Ion traps were also known as beam benders, for what are now obvious reasons.
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