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Rickenbacker International Corporation - Forum • View topic - Rickenbacker cap .0047mF - What is the cut off frequency?

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 Post subject: Re: Rickenbacker cap .0047mF - What is the cut off frequency
 Post Posted: Sun Nov 06, 2011 12:49 am 
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Joined: Fri Oct 21, 2011 12:43 pm
Posts: 27
In case anyone follow this, I'd like to add a couple of pics of the filter data.
And for my own reference. ;)


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 Post subject: Re: Rickenbacker cap .0047mF - What is the cut off frequency
 Post Posted: Fri Nov 11, 2011 2:33 am 
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 Post subject: Re: Rickenbacker cap .0047mF - What is the cut off frequency
 Post Posted: Sat Nov 12, 2011 10:28 am 
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Joined: Mon Mar 05, 2007 12:33 am
Posts: 3403
Location: Denver
I think you're just saying what I said--albeit with more detail--correct me if I'm wrong? I read your post and agree 100%, it's what I was trying to get across with what you quoted. I think where I may have erred from your perspective is mentioning cancellation in zero degrees phase (which is the norm) although what you may not be thinking about that I was is that due to spatial differences in the pickups there are some frequencies that do indeed cancel and some that add together like you said. Thanks for adding to the discussion.


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 Post subject: Re: Rickenbacker cap .0047mF - What is the cut off frequency
 Post Posted: Sat Nov 12, 2011 4:08 pm 
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Joined: Fri Oct 21, 2011 12:43 pm
Posts: 27
Any 360/12c63 owners out there!
Have anyone tried to measure the cut off frequency (calculated to 273 Hz)?
Would anone agree to my calculations earlier in this topic
Do you have 330k(neck)//330k(bridge)//500k(blender)-all parallel? (would be total 124k)

Keep posting!
Thanks!


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 Post subject: Re: Rickenbacker cap .0047mF - What is the cut off frequency
 Post Posted: Sat Dec 17, 2011 2:26 pm 
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Joined: Sat Jan 08, 2011 8:34 pm
Posts: 35
Location: Cornwall, UK
Unless I missed it, nobody has mentioned that the input impedance of the amp will affect the cut-off frequency. An amp with a lower impedance will cause this frequency to rise, as you are trying to draw more current through the capacitor.


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 Post subject: Re: Rickenbacker cap .0047mF - What is the cut off frequency
 Post Posted: Sun Dec 18, 2011 7:20 am 
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Joined: Sun Oct 08, 2006 6:07 am
Posts: 3848
Another reason we all like tube amps: the input impedance from jack straight into the grid of a 12AX7, whatever impedance that is, is an optimal impedance for jangle.


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