Zombie chorus with anti tick mod 1590b layout?..

[deadastronaut]

hi guys, i remember my zombie chorus ..and i loved it, and lost it ....a great chorus!....however

i can't find a schematic with the anti tick mod included, or a 1590b layout with it added.....unless someone knows better?..

anyway i'll give doing a 1590b layout a go, if nobody else has, i'm in need of a 'lush' chorus for myself at the mo ...

heres the well known schematic.....
http://dl.dropbox.com/u/7464107/zombie.jpg

and the de- tick mod!..
http://dl.dropbox.com/u/7464107/DETICK%7E1zombie.jpg

according to the de-tick mod where do those 2x10k's go on the schematic?...and the lfo cut?......i'd like to get that sorted before i attempt a layout!....thanks guys!..
i presume this will be ok with 2xtlo72's....(as i read that its not a good idea to use a quad)

edit:  and heres RG's layout for reference too..
http://dl.dropbox.com/u/7464107/zombie.pdf

[fretzburner]

Try this Mr.Deadastronaut


upload images

But move the two resistors from pin 10,11 of CD4046 to pin 11 and 12 respectively as per schematic.

[deadastronaut]

ahhhh good man, you saved me a lot of grief with that!!!..cheers, i'll copy that into diylc and move those resistors.....your a star!...thanks.

ill post it up later ok, (to make sure i got it right!..

btw have you built that version?....any ticking?.....

[fretzburner]

Yes i built it and very low ticking almost inaudible but on clone mode i could here little ticking.If used together with pedals using max1044 very loud ticking.

[deadastronaut]

so this doesn't have the detick mod then?....

if so how could i incorporate that into it?...

cheers man!.

[fretzburner]

Look at the orange and brown traces that's the two separate V+/2(vref) traces.In my understanding that's the detick mod.

[deadastronaut]

ok, cheers, but i still don't quite understand that mod...on the detick fix mod link it has 2x10k's ...1 going to 9v (i presume), and 1 to ground with the vref/2 going to pin 7? from the middle of them both....is that right?.

sorry man, i'm being a dumbass....again!...i'm having a hard time comparing 3 different layout/schem/pcb!..

anyway, done the layout and moved those resistors...look ok?..

[Mark Hammer]

I can't see any of these layouts from work, so I'll simply say that you should avoid using a quad op-amp for the circuit if the layout incorporates one.  For deticking, you will want to isolate the dual op-amp used for the LFO from the one used for the audio path.  The ticking occurs because the one is influencing the other.  If you incorporate them into a quad, that isolation becoms impossible to achieve.

[deadastronaut]

cheers mark, its on 2x tl072's...no quads.

[fretzburner]

That's lightning fast deadastronaut.Looks fine and about the detick mod the LFO vref is 2x10k while the audio vref is 10k/15k.I built this with dual LFO to make a dual chorus and the result was okay.I can switch between two different settings of rate and depth.

[deadastronaut]

  yeah i don't hang about....

okey dokey...so like mark said, are the lfo/audio 'isolated' now then?....but  still have some ticking?....hmmm...


btw i was thinking about a mix pot on this too..i remember my old zombie and wanted one on that  for a nice blend choice!.(think alex lifeson) ...

[deadastronaut]

hmmmm on the detick fix it has a cut on pin5?.to seperate / isolate  ..correct!?    (i remember doing that on my old zombie) (which didn't have any ticking)

erm...so should i put a cut in the new layout at all....erm......i'm lost!..

[Perrow]

Haven't I read somewhere about using TL062 instead of TL072 for LFOs, to reduce ticking.

Listened to a few soundclips from this, beginning to get interested  (i.e. curly layout coming soon  )

[deadastronaut]

@pelle; you may be right on that!...i also read about 358's......

not sure though....(it is a great chorus try it.)

ordered up a few mn3007/cd4046's.....i'll still breadboard this to see if there is any ticking first though!...

as i may stick this in a multi fx....if it doesn't tick....i don't fancy building a clock..


@fretz:/mark: /   so is that isolating 'cut' in fretz's layout?....

[deadastronaut]

ahhh the penny has dropped...gotcha!..

so that layout is with the seperate vb's...

still don't get the cut part though!...(to stop ticking/isolation)

isn't there a schematic around with these mods? it would be handy for dumbasses like me who find it a nightmare trying to decipher layouts/pcb/vero/perf/


EDIT:  this guy added vibrato to it too...not sure if he cured the ticking on his rev:B..
http://translate.google.com/translate?sl=es&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.pisotones.com%2FZombie%2FMBC%2FZ2%2FZCh2.htm&act=url


edit 2:

just had a listen/look at the tonepad small clone chorus, sounds nice and no problems on the build reports as far as i can tell....i think i may just go with that instead
i just don't fancy the idea of any ticking at all.....i'm a fussy bugger!.. ..especially as it may go into a multi fx i may build!..
it asks for a cd4047...could i use a 4046?...(that i ordered )...if not no probs!..

thanks for your help anyway guys!..appreciate it.

[Perrow]

The cut was to make separate VBs, and your layout has that. VB resistors circled.



Curlyness coming up.

[deadastronaut]

ahhh gotcha, cheers pelle...

ive read that people still have some issues with noise on it though....so not sure if i'll go with this yet!..
not sure if breading it would be a good idea, as it seems fussy about layout with the cd4046....

the tonepad small clone seems ok...noiseless!..

[Govmnt_Lacky]

the tonepad small clone seems ok...noiseless!..

Uses CD4047 

[deadastronaut]

yeah i know... @#$%ing typical

the @#$%er..i ordered 4046...now to order 4047'...

some cool mds out there for it too...on the vids ive heard sounds nice!!!!..

[Govmnt_Lacky]

yeah i know... @#$%ing typical

the @#$%er..i ordered 4046...now to order 4047'...

some cool mds out there for it too...on the vids ive heard sounds nice!!!!..

I built one a while ago. Did the stereo out mod, cap switch mod, and the depth pot mod. All in all, it is one of the more "lush" chorus' you can find. Definitely recommend it if you want something that can go from subtle to WOW