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DIY Stompboxes => Building your own stompbox => Topic started by: nonoxxx on April 11, 2017, 05:17:04 PM

Title: Best way to add a volume knob to a delay kit
Post by: nonoxxx on April 11, 2017, 05:17:04 PM
Hello,

I am actually building the bluelay kit from musikding ( really cool analog delay, I had build one for a friend and it was a pain to send it to him lol ) and i am wandering what should be the best way to add a volume knob

Considering this schematic :

http://diy.musikding.de/wp-content/uploads/2015/11/bluelayV2schem.pdf (http://diy.musikding.de/wp-content/uploads/2015/11/bluelayV2schem.pdf)

I will go for replacing R19 for a 100k pot (voltage divider) and setting the 25k trimer (R5) a little higher to get something louder than unity level at max.

Do you have any suggestion or a better practice ?
Thanks
Title: Re: Best way to add a volume knob to a delay kit
Post by: blackieNYC on April 11, 2017, 07:19:22 PM
Should do nicely. Not very important but calculate the freq of the 25k/100p combo and adjust the cap value to work with the new trimmer, but it's a variable resistor application so it's not exact. Theoretical.
Title: Re: Best way to add a volume knob to a delay kit
Post by: nonoxxx on April 12, 2017, 09:37:29 AM
Thanks I was missing this point :)

It shoul not affect alot the sound , but It should reduce some highs .

edit :

After calculating the RC filter with the trimer at max (50k) the frequency cut start at 31kherz so it should be good as is
Title: Re: Best way to add a volume knob to a delay kit
Post by: nonoxxx on April 12, 2017, 09:54:20 AM
I am also wandering if this trimmer can be after replacement with a standard pot  be used as a volume pot