I was having a play today, substituting resistors in the HPF on one of the channels on my soundcraft delta console, using online calculators, listening, running sweeps and basically having some fun.
Then I wondered about using one of the aux pots, as a variable resistor so I could have a sweep able HPF.... I can't be the first one to think of this...
The aux pot is a 22k pot.
The resistor values would need to go between 10k and up to say 82k to cover the range I want... 40 Hz to 340hz.
The way I figure it, I could wire the pot as avariable resistor in series with a 10k resistor so when the pot is shorted I get my 10k, but I can't figure how to get up to 82k....
Any thoughts?
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HPF on console
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HPF on console
Peter Knight
Cant ego loquemur Latine
http://www.peterknightmusician.com
Cant ego loquemur Latine
http://www.peterknightmusician.com
- Wiz
- Valued Contributor
- Posts: 1147
- Joined: Thu Dec 03, 2009 10:17 pm
Re: HPF on console
Replace the pot with a larger value one? 100k perhaps?
I don't think there is a simpler solution. Slugging more resistors in series will increase your minimum resistance. Slugging any resistors in parallel will decrease your minimum resistance.
I don't think there is a simpler solution. Slugging more resistors in series will increase your minimum resistance. Slugging any resistors in parallel will decrease your minimum resistance.
- Sammas
Re: HPF on console
I think you might be right... I was just hoping to use the one in there already..
thanks
thanks
Peter Knight
Cant ego loquemur Latine
http://www.peterknightmusician.com
Cant ego loquemur Latine
http://www.peterknightmusician.com
- Wiz
- Valued Contributor
- Posts: 1147
- Joined: Thu Dec 03, 2009 10:17 pm
Re: HPF on console
can you make the filter sweepable using just a single gang pot? Most HP filters are 2 or 3 pole and require two or three resistor values to be simultaneously changed. Thus you'd need a two or three gang pot.
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rob - TRM Endorsed
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- Location: Adelaide
Re: HPF on console
I should post a follow up.
It's all work d out and going.
Joe Malone, helped me out... I have one channel done... And Joe is overnighting the parts to me to do the remaining channels....
I pulled out the aux 4 pot and replaced it ... And that's now a high pass filter that sweeps from down around 35 up to about 350.
Just killer
8)
Joe, what a guy
It's all work d out and going.
Joe Malone, helped me out... I have one channel done... And Joe is overnighting the parts to me to do the remaining channels....
I pulled out the aux 4 pot and replaced it ... And that's now a high pass filter that sweeps from down around 35 up to about 350.
Just killer
8)
Joe, what a guy
Peter Knight
Cant ego loquemur Latine
http://www.peterknightmusician.com
Cant ego loquemur Latine
http://www.peterknightmusician.com
- Wiz
- Valued Contributor
- Posts: 1147
- Joined: Thu Dec 03, 2009 10:17 pm
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