I am working on this as part of my other P10 thread, but I thought this deserved its own discussion.
I used the Tone Stack Calculator application to plot the frequency response of the tone stack, and compare it to those of Pathfinder 15r and an old school VOX stack. And then try to find values that could work and give a similar curve.
I do not know much about filters and plotting curves, so I would appreciate any feedback
This is the plot of a classic VOX. I tried different schematics like that of AC15c1, but the curve was very close to this one.
You cannot view this attachment.
This is the stock pathfinder 10. The bass pot is a bit off to compensate for the extra resistor in the circuit. And yeah it's quite off...
You cannot view this attachment.
This is pathfinder 15r. Still a bit off, but much better
You cannot view this attachment.
This is what I am planning to do on my pathfinder 10. I tweaked it to come as close to the classic Cox curve with values that I have. I plan to do this point to point on top of the pots. I know that the pots won't track the same as the original, and the curves won't be identical, but the starting point should be close enough to give a good approximation
R4 will be replaced with a single resistor. That's why it's shown at 100%.
You cannot view this attachment.
Any thoughts? Did I miss something?
I used the Tone Stack Calculator application to plot the frequency response of the tone stack, and compare it to those of Pathfinder 15r and an old school VOX stack. And then try to find values that could work and give a similar curve.
I do not know much about filters and plotting curves, so I would appreciate any feedback
This is the plot of a classic VOX. I tried different schematics like that of AC15c1, but the curve was very close to this one.
You cannot view this attachment.
This is the stock pathfinder 10. The bass pot is a bit off to compensate for the extra resistor in the circuit. And yeah it's quite off...
You cannot view this attachment.
This is pathfinder 15r. Still a bit off, but much better
You cannot view this attachment.
This is what I am planning to do on my pathfinder 10. I tweaked it to come as close to the classic Cox curve with values that I have. I plan to do this point to point on top of the pots. I know that the pots won't track the same as the original, and the curves won't be identical, but the starting point should be close enough to give a good approximation
R4 will be replaced with a single resistor. That's why it's shown at 100%.
You cannot view this attachment.
Any thoughts? Did I miss something?