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Old 18th February 2009, 12:48 AM   #1
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Default Outer foil k40y-9

Does anyone know which side of a k40y-9 is the outer shield? I read that the backward E indicates this, but it's been awhile and I forgot.
Tried google but after an hour I give up. I don't own a scope so that method won't work for me. Richard
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Old 4th May 2009, 04:59 PM   #2
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This is my understanding. I'm hoping someone will correct me if I am wrong.

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Old 4th May 2009, 10:09 PM   #3
surfstu is offline surfstu  United Kingdom
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Is this really necessary? I have just built a linestage and the final output caps are audionote foil, I was on the website earlier and it appears that i have installed them the wrong way round! beginners luck!! my question is... will i really notice if i turn them around?

cheers stuart
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Old 4th May 2009, 10:36 PM   #4
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Auricap says the outer foil should go to the signal source (driver stage) and the inner foil goes to the circuit output (power tube's grid). Many people who have tried say it doesn't make much difference either way.

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Old 4th May 2009, 11:37 PM   #5
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If you ground the shield it does not matter, but if not it may pick up lower frequencies a bit better when outer shield is soldered to a grid.
The Devil is not so terrible as his math model is!
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