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i believe you would just take out C17, and then the bypass circuit from C16 to R11 on the schematic.

RnFR wrote:i believe you would just take out C17, and then the bypass circuit from C16 to R11 on the schematic.

awesome thanks.. kinda what I hoped.. and I'd forgotten about c17.. but that's cool.. will go on with that as the plan.

here rocklander i took a pic of the schematic and adjusted it with paint sorry about the crudeness but thats all you do to change it now look up how to do a millenium bypass or just a standard 3pdt switch with a led and use that as i have shown the change in the pic as the circuit. It will work fine i have just removed the fet switching that ibanez uses that is not true bypass enjoy

pedalgrinder wrote:here rocklander i took a pic of the schematic and adjusted it with paint sorry about the crudeness but thats all you do to change it now look up how to do a millenium bypass or just a standard 3pdt switch with a led and use that as i have shown the change in the pic as the circuit. It will work fine i have just removed the fet switching that ibanez uses that is not true bypass enjoy

nb10.jpg

thanks for that.. so do I not need R11 to VBIAS either?

no you don't exactly as the pic shows r11 bias the second fet q2 it has nothing to do with how that circuit operates only the switching for the non true bypass

awesome.. that saves me some room.... should have first draft available soon.

Nice one! I like the example from the 1894 datasheet too(pcb included...), but it's in stereo ...
I'd try both versions and compare, maybe next year
Best regards!

okay... since you seem pretty keen.. I'm posting my first draft, but I have NOT even gone over it once to check as yet.. it's a start.. and as soon as I get a chance I'll go over it... unlikely for a few days though.

please lemme know if you see any errors
expressPCB file.


[edit]added pix... I can already see room for improvement, but no errors so far... I'm hoping it'll fit in a 1590a

what program is your file from eagle or which one? thanks

rocklander wrote:okay... since you seem pretty keen.. I'm posting my first draft, but I have NOT even gone over it once to check as yet.. it's a start.. and as soon as I get a chance I'll go over it... unlikely for a few days though.

please lemme know if you see any errors
expressPCB file.

has anyone been first guinea pig to try this one yet??? Just curious as i want to use it after a compressor as some tend to want to be little snakes once you give them a bit of juice or i was thinking of incorportating it into the same pedal.

now's your chance bro... guinea pig away

My thoughts exactly. Get into the kitchen and turn up the heater

must be winter for you dirk over here in australia it's summer. about 32 deg today lovely. ok time to guinea pig away not sure wheather i should build it stand alone or with a compressor hmmm have to think about that one

for starters, you could just compare the layout to the cct.. cross off components etc... ensure they're consistent .. no need to heat up anything but the laser printer for that

Thank you very much for this schematic and the layout. I modified Rockman's layout (sorry for the two huge jumpers) as there were some deviations from the schematic. I already build it and it astonishingly worked first time. I have no idea how good it works, because I have to test this in my rehearsal room with the noisy Orange Squeezer and his noisy mates but on first encounterI think I might like it.

This is the layout if somebody is interested, the LM1894 I bought here.

The copied schematic without the switching part here

And the BOM (all 1uF are non-polar and SMD and all the SMD pads on the layout are 1uF 1206s):
C1 47n
C2 1u
C3 100p
C4 1u
C5 8n2
C6 100n
C7 1n
C9 100u
C10 8n2
C11 4u7
C12 47n
C13 1u
C14 100p
C15 1u
C18 1u
C19 10u
C25 100u
C26 47u
CX 22n
U1 4558
U2 4558
U3 LM1894
U4 IN
U5 9V
U6 GRD
U7 OUT
VR1 1K
D1 1N4002
R1 1K
R2 510K
R3 10K
R4 10K
R5 4K7
R6 10K
R7 10K
R8 4K7
R12 510K
R13 470R
R14 100K
R26 10K
R27 10K
R28 180E
R29 2K4
R30 100E

ALEX over at GUITAR FX LAYOUTS did a Stripboard-Layout.

What a coincident!

I like the theory behind this pedal, dialling out the specific frequencies with the noise instead of gating noise and signal together.
Would you chaps happen to know if there are any more effects out there (either pedal or rack) that eliminate the noise this way?

Whoops, that would be the Rocktron Hush then. Don't I look silly now.
I suppose I'm just more into creating noise than killing it.