Walrus Julia Chorus Vibe

PedalPCB

Administrator
Staff member
1 33R
1 470R
1 1K
1 2K7
4 4K7
1 6K8
15 10K
4 12K
1 22K
3 33K
5 47K
1 56K
2 100K
1 330K
1 470K
3 1M

1 47p
2 100p
2 470p
2 3n3
2 6n8
2 8n2
1 10n
3 33n
1 47n
2 100n
2 1u MLCC or Film
2 10u
1 47u
1 100u
1 220u

1 9V1
2 3mm Red or 2.2uF MLCC capacitors (see below)
1 1N914
1 1N914
1 1N5817

1 RC4558
1 V3207D
1 V3102D
1 TL072

5 2N5088

1 SPDT ON/ON

1 B10K
2 B100K
1 B250K
1 50K TRIM


Personally I recommend substituting the two 3mm Red LEDs with two 2.2uF MLCC capacitors. These are part of the Sine/Triangle wave shaping circuit, Neither give a perfect sine by any means, but the capacitors are much smoother than the LEDs.
 

ojeebiso

New member
Any suggestions for alternatives to the RC4558? Only seeing the SMD version of the RC4558 on tayda right now. TL072 or NE5532?
 

lukevosper

New member
looks great, thanks for this! do you think the stereo version 'julianna' would be much different? would love to see your schem for this as i'd love to try and addapt this to stereo out
 

Boba7

Active member
1 33R
1 470R
1 1K
1 2K7
4 4K7
1 6K8
15 10K
4 12K
1 22K
3 33K
5 47K
1 56K
2 100K
1 330K
1 470K
3 1M

1 47p
2 100p
2 470p
2 3n3
2 6n8
2 8n2
1 10n
3 33n
1 47n
2 100n
2 1u MLCC or Film
2 10u
1 47u
1 100u
1 220u

1 9V1
2 3mm Red or 2.2uF MLCC capacitors (see below)
1 1N914
1 1N914
1 1N5817

1 RC4558
1 V3207D
1 V3102D
1 TL072

5 2N5088

1 SPDT ON/ON

1 B10K
2 B100K
1 B250K
1 50K TRIM


Personally I recommend substituting the two 3mm Red LEDs with two 2.2uF MLCC capacitors. These are part of the Sine/Triangle wave shaping circuit, Neither give a perfect sine by any means, but the capacitors are much smoother than the LEDs.

So it is basically a CE2 :)
Yeah I remember doing the led trick to get a sine wave for my CE2B (wonderful and ugly pedal that was easily modded to be a CE2 with a mix pot).
Thanks!
 

youngkong10

New member
Anyone who's making one of these, the pedalpcb version seems to have a much slower maximum rate than the Julia, you can fix this by changing r6 from 1M to 470k and changing the rate potentiometer from B100k to B1M. It will still go as nice and slow as before but also be able to go a little over twice as fast.
 

PedalPCB

Administrator
Staff member
Anyone who's making one of these, the pedalpcb version seems to have a much slower maximum rate than the Julia
That's odd, the component values are correct (and also the same as the CE-2), but hey, nothing wrong with a little more range on the speed pot!

I like my modulation to be able to hit raygun territory. :D
 
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