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

[bluebunny]

If you tell me how to insert photos I post here. Thank you all

• Find a home for your picture on the intenet (e.g. imgur.com).
• Click on Mona:
• Put the URL of the picture¹ from step 1 between the [img] tags.
• Check your picture is visible using the "Preview" button.
• Hit "Post"!   

---

¹ Has to be a picture, not an HTML page.  So something ending .PNG or .JPG or similar.

[Dylananto]

Sorry but I can not put any images

[Dylananto]

I've done it 
To be my first pedal DIY is not bad

[bloxstompboxes]

I've done it 
To be my first pedal DIY is not bad

I like the font and the image. Reminds me of the movie Dazed and Confused.

http://www.imdb.com/title/tt0106677/mediaviewer/rm3954875648

[duck_arse]

Sorry but I can not put any images

incorrect!

I've done it 
To be my first pedal DIY is not bad

correct, and correct! well done, both counts.

[Dylananto]

Sorry but I can not put any images

incorrect!

I've done it 
To be my first pedal DIY is not bad

correct, and correct! well done, both counts.

Thank's

[Dylananto]

Hi everyone, my Epic Chorus suddenly stopped running, at normal volume not by any sound, if I raise the volume of the amplifier at most it feels a bit chorus sound. I checked everything, welds, potentiometers, I checked the values ​​of q1, q2, q3, MN3007,4047,358,4558 and all the values ​​are ok. What could be the problem?
Regards
Antonio

[deadastronaut]

hi guys, didnt want to start another chorus thread....but

am i losing it or what?

in the data sheet for a mn3007   pins are

1 gnd
2 cp1
3 in
4 vcc  +voltage
5 vdd 
6 cp2
7 out
8 out

correct?
http://pdf1.alldatasheet.com/datasheet-pdf/view/14235/PANASONIC/MN3007.html

https://www.google.co.uk/search?q=mn3007&client=opera&tbm=isch&imgil=aToXEGogR_NS-M%253A%253BdWfKvotdgkS3wM%253Bhttps%25253A%25252F%25252Fwww.musikding.de%25252FMN3007&source=iu&pf=m&fir=aToXEGogR_NS-M%253A%252CdWfKvotdgkS3wM%252C_&usg=__FbcUAuX7VZt8P2YBVCw70zJunxc%3D&biw=992&bih=731&ved=0ahUKEwiYibf3jYXWAhXKC8AKHcQaAvYQyjcIQQ&ei=9eipWdi6JcqXgAbEtYiwDw#imgrc=aToXEGogR_NS-M:

whereas on the chorus's ive looked at, zombie etc etc..

they have used

1 +voltage
2
3
4 gnd
5 gnd
6
7  +voltage via resistor
8  +voltage via resistor

whats that about..

[bluebunny]

Hmmm... weird.  I thought it's due to 3007 vs. 3207, but I can't see a difference in the datasheets I'm looking at.  But at least two Madbean projects (Current Lover, Pork Barrel) can accommodate either chip; however, you have to set a pair of jumpers one way or the other because, as Brian states, the power and ground pins (1 and 5) are reversed.  But like I said, the datasheets don't appear to reflect this.  Perhaps I'm looking at bad datasheets... 

[deadastronaut]

Hmmmm yeah very strange...i looked at a few sheets, all the same...

[duck_arse]

does your datasheet spec Vdd as -15V? the one I was looking at does. so if you have -15V, then pin 5 is supply and pin 1 is ground. if'n it's +15V you have, then pin 1 goes supply (shown in the application circuit as connected to Vcc, no less) and pin 5 goes ground. (I'll stand now, waiting to be corrected .....)

from a sheet marked "Panasonic MN3000 series   MN3007".

[deadastronaut]

hi guys, revisited this old zombie tick lark......

i breaded up the old zombie as it is a nice lush chorus....and yes it had the usual ticky /sound of crickets in the background....annoying as hell..
and has rightly peed me off the last few days...tried all the anti tick stuff..to no avail..

however i think i cured it in a strange unorthadox way....

on the 4046 in the schemo the 9v goes to pin 16.....however, i connected the 9v to pin 15 too (which on the datasheet they call 'zener' (pin-15)

and voil'a, utterly silent....whether the 4046 will suffer later is another thing..

but yay it bloody works....great.

but its working very nicely.

i swapped out the schemo lfo for my own too...(but it did tick with the original, and mine..)

putting this out there for any other future zombies...

but why would that work??? cheers guys.  back to playing rush songs again. 

[Mark Hammer]

VERY interesting.  I will have to try that.

[deadastronaut]

^ yeah give it a go mark......still working nicely on breadboard...

edit: just to test i swapped out the 062 for an 072 too...still fine. 

[bluebunny]

It looks like that pin is intended "to assist supply regulation".  It's a 7V zener, so I guess it's having the effect of dragging your supply down to 7V?  Although I think it's intended that there's a resistance between the power supply and a zener for this regulation to happen (that's a zener thing, not a 4046 thing).

Caveat: I'm just regurgitating what I'm reading on Wikpedia and the TI website.  I am a very tired bunny (gonna turn into a pumpkin any time now) and may be talking bollocks.  Sooo... YMMV.

[deadastronaut]

Cheers Marc,  I,ll have a measure up when I get a mo to see if its pulled down to 7v then....

[bluebunny]

Cool.  I'm awake now and I've had coffee.  It would be nice to know if I was making any sense at all!   

[Elijah-Baley]

Cool, deadastronaut!

I built the layout from tagboard, and it's fine enough. It ticks just at extreme setting, but in normal chorus sound it's pretty ok.
I read, but I still never tried, that the Sabrotone layout is ticking-less. I don't remember, but the schematic is almost the same, just some 9v and Vref filtering differences. But I'm not sure if it's really meaning.

So, just it? Should we have add a jumper from the pin 16 to the pin 15?

[deadastronaut]

^ yep that's it.....try it.

I had seperate vref for opamps and lfo,  still ticked, more like a cricket sound...


edit: pin 14/15/16 at 9v... not 7.

[duck_arse]

just wait till anotherjim sees this ......