CGS35 - 47K output resistor

[Flareless]

Quick question;

In Ken's documentation of the CGS35 he states that if fitting the output level with a potentiometer "The associated 47K resistor can be replaced with a link". Does this mean it SHOULD be replaced with a link? Is there any benefit to using a link versus a resistor?

Since I plan to use a potentiometer for the output level I thought I should figure out my course of action before soldering.

[wackelpeter]

i would omit the output potentiometer and therefore add attentuators for the input signals...

The 47k can be ommited and a link instead can be used... with a link you will have less gain at the output... at least the higher the resistance in the feedback path of the op amp is the more gain you have...

Well when self oscillating this thing can become very loud... maybe you just paly a bit around with it... until you find what suits your tastes... perhaps it's a good idea to keep a back door open to add an output pot afterwards or if you don't add attentuators for the inputs first some spare room to add them later on...

[Flareless]

[wackelpeter]

When you will attentuate the input signals you should not remove the original input resistors but add a pot with wiper to that resistor one outer lug goes to gnd and the other to the signal input...

For audio signals i would use log and for CV lin pots... but it's not necessary to have log pots for the audio input... only because the human hearig is more close to a log response...

A good advice is to look over at Ken's other Steiner VCF design or Yves Yusson's design.... i've built both of these designs and i'm happy with them, liking the Yusynth Steiner VCF a bit more...
http://www.yusynth.net/Modular/EN/STEINERVCF/index-v2.html
http://www.cgs.synth.net/modules/cgs35_euro_vcf.html

[Flareless]

Thank you for the tips! I will try them out and see what happens.