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Post by pablogilberto on Jan 24, 2020 5:38:24 GMT -5
Hello!
I would like to create a Guitar Wiring Test Module where in I can see (visual) and listen (audio) in order to compare and identify the effects of potentiometers, capacitors and wiring connections and mods.
I understand their effects but this time, I would love to create a demonstration of it.
I have found this very interesting video on Youtube.
Here is the link:
The guy is using the same technique of checking the frequency response of pickups.
He has his own box for doing the testing.
He is only using 1 control knob for Volume and 1 control knob for Tone.
He changes pots values (250k, 500k, 1Meg, etc) and taper (linear and audio) using only switches.
I'd like to get an idea on how can we possibly do this?
I'm thinking of the technique that he might did for this.
Thank you!
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Post by Deleted on Jan 25, 2020 11:19:25 GMT -5
He is only using 1 control knob for Volume and 1 control knob for Tone. He changes pots values (250k, 500k, 1Meg, etc) and taper (linear and audio) using only switches. I'd like to get an idea on how can we possibly do this? I'm thinking of the technique that he might did for this. Thank you! well can do 1M 500K and 250K easy enough Audio (Log) and Lin i think But adding the 100K , could do it Just in LIN/LOG but not both myself. Unless you cheat and make a LIN to to LOG via a Resister So do 500K+500K=1M , 500K, 1/((1/500K)+(1/500K))=250K and 100K Or just have a Quad Pot that you change the Wafers for 1M, 500K 250K and 100K then have a Switch to add the Resister to make a Fake LOG. |
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Post by pablogilberto on Jan 27, 2020 9:20:36 GMT -5
He is only using 1 control knob for Volume and 1 control knob for Tone. He changes pots values (250k, 500k, 1Meg, etc) and taper (linear and audio) using only switches. I'd like to get an idea on how can we possibly do this? I'm thinking of the technique that he might did for this. Thank you! well can do 1M 500K and 250K easy enough Audio (Log) and Lin i think But adding the 100K , could do it Just in LIN/LOG but not both myself. Unless you cheat and make a LIN to to LOG via a Resister So do 500K+500K=1M , 500K, 1/((1/500K)+(1/500K))=250K and 100K Or just have a Quad Pot that you change the Wafers for 1M, 500K 250K and 100K then have a Switch to add the Resister to make a Fake LOG. Thanks for the input. How do you add a resistor to make a fake LOG? Can you show me a diagram or describe it more detailed? What value should I put? Thank you! |
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Post by Deleted on Jan 27, 2020 11:54:44 GMT -5
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Post by ashcatlt on Jan 27, 2020 13:11:00 GMT -5
its never a nice curve .. but what is ! It’s also not a great idea for a guitar V pot because the tone depends so heavily on the load. This will be just less than 1/4 the total pot value when it’s turned all the way up. The overall effect will be very much like turning the T pot opposite the V pot all the time. Changing taper is kind of silly. It’s the same either way at the extremes. All of the in-between ratios are available on both. All that changes is the percentage of rotation that it takes to get there. That is, you might set one to 5 and the other at 7.5 to get the same values, but once you do absolutely everything else is the same. If we can assume that bottom of all of these pots are going to be grounded anyway, then we just need a switch with two poles and however many independents throws as you want. The Alpha rotaries I use come up to 2P6T on a single wafer, but they also have 2P12T on two decks, and if you need more than that... The common lug of one pole is the top of the pickup and the other is the top of the output jack. Put the appropriate pot lug on the other lugs and go. For the T pots you only need to switch one lug, so things are even easier. |
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Post by Deleted on Jan 27, 2020 17:19:12 GMT -5
While looking around the I did see this box insides and looked switching than pots
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