Caesar Chorus Question

[steviejr92]

So i was looking at the schem for the Caesar Chorus and R28 which is a 330k is attached to Vref. Just would like to know what its doing exactly. Is it helping pull down voltage for Q5 or is that what the other Resistors 29-31 are doing? Is having an exact value there necessary i have a 360k and dont think itll affect the circuit much but thought id ask to be safe.

 

[Robert]

Those are a series of high-pass / low-pass filters.

Section 7.3

ElectroSmash - Boss CE-2 Analysis

Chorus Effect,Architecture,Circuit, Achematic,Layout,Components Part List,JFET Bypass Switch, Power Supply,Boss ACA vs. PSA Power Supply Adapters,Input Buffer,Input Impedance,Pre-De Emphasis Filters,Shelving Filters with Operational Amplifiers,Inverting O

www.electrosmash.com

 

[steviejr92]

Those are a series of high-pass / low-pass filters.

Section 7.3

ElectroSmash - Boss CE-2 Analysis

Chorus Effect,Architecture,Circuit, Achematic,Layout,Components Part List,JFET Bypass Switch, Power Supply,Boss ACA vs. PSA Power Supply Adapters,Input Buffer,Input Impedance,Pre-De Emphasis Filters,Shelving Filters with Operational Amplifiers,Inverting O

www.electrosmash.com

Awesome thank you so much!

 

[steviejr92]

Funny enough i cant access that website idk whats going on says your connection is not private every time i click on it....

 

[Robert]

Same here, their SSL certificate has expired but I just ignored it and went ahead.

In the meantime:

 

[steviejr92]

Perfect! Now to read it 100 times to make sense of it (not kidding)

 

[Robert]

Long story short, changing the values will change the cutoff frequencies.

Changing the 330K to 360K will change the high pass cutoff frequency from 14.6Hz to 13.4Hz.

 

[steviejr92]

So how dramatic of a change is that when were talking about listening by ear? Is it noticeable? I believe i have a 300k im assuming itll change the the high pass cutoff freq in the opposite direction. Would that be better in this situation?

 

[iamjackslackof]

So how dramatic of a change is that when were talking about listening by ear? Is it noticeable? I believe i have a 300k im assuming itll change the the high pass cutoff freq in the opposite direction. Would that be better in this situation?

I really doubt you would be able to hear a change from 14.6Hz to 13.4Hz. It's on the upper end of hearing for most adults anyway, which I read tends to cap out at about 15KHz. There are calculators to determine the cutoff frequency of different RC networks.

 

[steviejr92]

I really doubt you would be able to hear a change from 14.6Hz to 13.4Hz. It's on the upper end of hearing for most adults anyway, which I read tends to cap out at about 15KHz. There are calculators to determine the cutoff frequency of different RC networks.

Awesome info just reassured me in placing the 360k there!