Elininating Ppts(tone control)

argonrepublic · 29th April 2005, 05:39 AM

I am a beginner at this stuff. I have very old very transparent Allen and Heath Mixer that I would like to modify. It has no monitor matrix so I cut the channel strips from the outputs. I am gfoing to use the direct outs from the strips. I would like to use channel 11 and 12 for monitoring. It is diificult to get all of the pots on the EQ section exact so I want to cut pots from the circuit and solder in resistors. The pots are 100k ohm and I want to simulate "dead centre". I went to Radio shack who only had 47k ohm resistors. Any tips greatly appreciated

Leslie Horn · 1st May 2005, 07:04 PM

If tolerance is that critical, replace each pot with with 4 ea 100 K resistors in series-parallel.

But watch out for log taper pots! Make sure they are linear taper, by measuring their resistance at center detent.

argonrepublic · 2nd May 2005, 05:45 AM

I am not sure what arrangement to put them in. I have three positons.

29th April 2005, 05:39 AM	#1
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	Elininating Ppts(tone control) I am a beginner at this stuff. I have very old very transparent Allen and Heath Mixer that I would like to modify. It has no monitor matrix so I cut the channel strips from the outputs. I am gfoing to use the direct outs from the strips. I would like to use channel 11 and 12 for monitoring. It is diificult to get all of the pots on the EQ section exact so I want to cut pots from the circuit and solder in resistors. The pots are 100k ohm and I want to simulate "dead centre". I went to Radio shack who only had 47k ohm resistors. Any tips greatly appreciated

2nd May 2005, 05:45 AM	#3
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	pots I am not sure what arrangement to put them in. I have three positons.

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1st May 2005, 07:04 PM	#2
Leslie Horn diyAudio Member Join Date: Feb 2005 Location: -124.22760W, 40.64431N	If tolerance is that critical, replace each pot with with 4 ea 100 K resistors in series-parallel. But watch out for log taper pots! Make sure they are linear taper, by measuring their resistance at center detent.

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