balance between clean/od

[ChrisM]

Either use a 100K linear or a 250K audio. Your issue is the pot.....

But the problem is the clean channel that has too little volume..

It's all relative to the pot's position though. You can't compare the two pots that are different value and different taper.

[dogears]

Many Dumbles use a 30% taper pot for the input gain. I'd suggest running a minimum of 1 oclock on the clean gain. I prefer 2 oclock personally. This with a 15% Alpha. Be careful with CTS. Some are 10% taper. You will need 3 oclock then!!!

If setting the clean like this, there is plenty of volume relative to the OD.

Internally, I do not set my OD trim over about 25-28K from ground. This is the sweet spot for me. If you have it cranked, that will also effect the balance.

Lastly, make sure your global master is at least a 15% taper. Remember, CTS 10% is bad.....

Either use a 100K linear or a 250K audio. Your issue is the pot.....

But the problem is the clean channel that has too little volume..

[mat]

I prefer 2 oclock personally. This with a 15% Alpha.

I use also alphas.

If setting the clean like this, there is plenty of volume relative to the OD.

I'll experiment more of this.

Internally, I do not set my OD trim over about 25-28K from ground. This is the sweet spot for me. If you have it cranked, that will also effect the balance.

My build sounds also horrible if the od trim is over 11:00 o'clock.

Lastly, make sure your global master is at least a 15% taper. Remember, CTS 10% is bad.....

How does one measure the taper of the pot ?

I'll remove the relay again and check with the jumpers again..

[Sonny ReVerb]

How does one measure the taper of the pot ?

From the "Secret Life of Pots"

If you have an unknown pot, you can figure out what taper it is. You measure the resistance from end to end, then turn the pot exactly to half its rotation and measure the resistance from the counterclockwise lug. The crosses on curves 1, 2 , and 4 show the most probable values. If the resistance is 50% of the total resistance, then the pot is linear. If you measure only 10% to 20% of the total resistance, the pot is an audio taper. If you measure 80%-90% of the total resistance, the pot is a reverse log taper.

The taper of the pot is the percentage of the value at the midpoint of rotation. So, a 100k pot with a 15% audio taper should measure 15k at the midpoint. A 50k pot with a 20% taper should measure 10k at the midpoint.

[mat]

How does one measure the taper of the pot ?

From the "Secret Life of Pots"

If you have an unknown pot, you can figure out what taper it is. You measure the resistance from end to end, then turn the pot exactly to half its rotation and measure the resistance from the counterclockwise lug. The crosses on curves 1, 2 , and 4 show the most probable values. If the resistance is 50% of the total resistance, then the pot is linear. If you measure only 10% to 20% of the total resistance, the pot is an audio taper. If you measure 80%-90% of the total resistance, the pot is a reverse log taper.

The taper of the pot is the percentage of the value at the midpoint of rotation. So, a 100k pot with a 15% audio taper should measure 15k at the midpoint. A 50k pot with a 20% taper should measure 10k at the midpoint.

Thanks sonny for explaining, that makes sense !