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PostPosted: Wed Nov 16, 2016 11:12 am 
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So the original build document for V1 of the analog chorus states the 47pf cap and the 150k resistor control the delay time and increasing either of the values would increase delay time.
If I replace the 150k resistor with a 500k pot there will be three prongs. Do I leave the middle prong alone and just wire the two outside prongs with a 47k resistor on either of those two prongs?
Also, should I use a B500k or A500k potentiometer?


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PostPosted: Wed Nov 16, 2016 11:35 am 
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Joined: Sun Jan 22, 2006 1:39 pm
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Location: Richland, WA
The mega chorus and vibrato kit is essentially the two knob analog delay kit with all the bells and whistles. The delay time mod that you are asking about is implemented on the mega chorus. Take a look at that schematic and let us know if you still have any questions.

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PostPosted: Wed Nov 16, 2016 1:50 pm 
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byoc wrote:
The mega chorus and vibrato kit is essentially the two knob analog delay kit with all the bells and whistles. The delay time mod that you are asking about is implemented on the mega chorus. Take a look at that schematic and let us know if you still have any questions.


Thanks for the reply. I looked at the pdf for the mega chorus and saw it uses a B500k pot, but possibly the 47k resistor is on the board idk.
I'm still learning and unsure how to accurately read a schematic apart from the values of resistors, caps, etc... that it lists.
Ill just try it and see how it comes out.


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PostPosted: Thu Nov 17, 2016 12:20 pm 
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There's a 150k resistor on the regular chorus that connects to +9v. This controls the delay time. You can replace it with 500k pot and the 47k resistor. They are in series, so it make no difference which comes first. You connect one end of the 47k resistor to one of the holes for the 150k resistor. Then you connect the other end of the 47k resistor to the middle lug of the B500k pot. Then you connect one of the outer lugs of the pot to the other open hole of the 150k resistor. If the delay time knob works backwards from what you expect, i.e., the delay time gets shorter when you turn clockwise, then swap which outer lug you connect to.

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