Bass variable freq high pass filter

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Bass variable freq high pass filter

johnk
This post was updated on .
some of you bass players might be interested in this one. it's a variable high pass filter for cutting the subs out of your signal to help in muddy environments and/or limit excessive low frequency cone excursion. the filter knob is sweepable from 140Hz to 35Hz. it also has a phase reverse switch and a volume control. volume control set to the maximum is at unity gain.

here's the verified vero layout for it:






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Re: Bass variable freq high pass filter

Sergio
Seems great! Thanks John!
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Re: Bass variable freq high pass filter

rocket88
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In reply to this post by johnk
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Re: Bass variable freq high pass filter

johnk
rocket88 wrote
That's awesome john. Do you usually add this to a circuit or have this as a separate pedal?
as a separate pedal so I can use it with anything. it also works well in an amp's effects loop.
it's the exact same circuit as Fdeck's HPF.
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Re: Bass variable freq high pass filter

rocket88
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That's an even better idea. I didn't even think about putting it into the effects loop. I always forget that its there. lol
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Re: Bass variable freq high pass filter

cylens
Thanks for the layout, john!

Just built a stripped down version (no phase switch, no volume pot and fixed frequency) in a 1590LB for a friend of mine, works perfectly!
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Re: Bass variable freq high pass filter

AC_FX
In reply to this post by johnk
Hi John - is the black circle in the 5th column, 2nd row, indicating a double link?
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Re: Bass variable freq high pass filter

johnk
AC_FX wrote
Hi John - is the black circle in the 5th column, 2nd row, indicating a double link?
yes.
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Re: Bass variable freq high pass filter

rudeez
In reply to this post by johnk
you're my star johnk, my long time bas playing friend asked me for this about 4 months ago, im sure he will be very happy when i tell him i'll do one for him :D
he had tested version 1 without the volume and phaseswtich so this is even better :)
thanks again!
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Re: Bass variable freq high pass filter

Mark SL
In reply to this post by johnk
How would we change the circuit to make it a low pass filter?

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Re: Bass variable freq high pass filter

AC_FX
In reply to this post by johnk
boxed this last night, works great, thanks.

bass hpf bottom feeder
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Re: Bass variable freq high pass filter

AC_FX
John, I'm building another one of these and noticed that the jumper from Source of Q1 is shown in two different locations.  It should jump that Q1 source to the phase switch row, and not to Q2 source, right?
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Re: Bass variable freq high pass filter

johnk
yep. I corrected it on the vero posted above today.