Add “Mix” knob to Lectric-FX Karaoke Chorus (CE-1) ?

[pricklyrobot]

Picked up a Karaoke Chorus PCB. Probably won’t get around to actually building it for a while, but was wondering if there’s an easy way to add a Mix pot?

Comparing it to my old Pork Barrel (CE-2) schematic, the output sections look fairly similar.
Could I just do this:



* full, hi-res Karaoke schematic is here: https://lectric-fx.com/wp-content/uploads/2022/05/KARAOKE-CHORUS.pdf

 

[Brinkman]

How did this go?

 

[pricklyrobot]

Predictably, this board is still languishing in the ‘to be built’ queue.
Hopefully I get to it before the 2-year mark

 

[Locrian99]

Predictably, this board is still languishing in the ‘to be built’ queue.
Hopefully I get to it before the 2-year mark

It’s a bit if a beast, but worth it

 

[Feral Feline]

What do you wish to do?

• 1 Have a dry signal and be able to blend in modulation?
• 2 Have a wet signal and be able to blend in some dry?
• 3 Have a 50/50 blend, with both dry & wet at max when the knob is at noon?

1) As shown in the OP — insert a pot at R45, the stock resistor feeding the pot.

2) Insert a pot at R46, retaining the stock resistor (or maybe a slightly lower value)

3) Dual-gang with one gang wired to R45, and the other gang wired to R45 — some additional resistor fettling will be required to balance out the two gangs when pot-knob is set to noon.

 

[pricklyrobot]

Option 1 should be fine for my purposes.

Thanks for explaining the other iterations as well though

I’ve got an Aion Small Clone (w/ some mods) all ready to assemble. After that the Karaoke will definitely be my next chorus build.