OKKO Dominator  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.

Re: OKKO Dominator

Postby Ted Thailand » 16 Oct 2011, 16:10

irombrus85 wrote:Hi guys,i write from Italy :D sorry for my english
Mundry's layout it's VERIFIED because I did and the Dominator is a bomb! coooool
Thanks to all for their work, some pictures of the toy:
ImageImageImageImage

Hello! irombrus85 Is that Mundry's Dominatrix V1.2 and How about your Q1,Q2 ...Is it BF245 ?
Ted Thailand
 
Posts: 9
Joined: 09 Oct 2011, 16:32
Has thanked: 2 times
Have thanks: 1 time

Re: OKKO Dominator

Postby sikheadzraf » 27 Oct 2011, 14:21

thanks for the dominator!
the only things that bothers me though is that i couldn't get a 7.5k, 51 ohm resistor & 51nF capacitor here at our place in aklan, phils.
what could be a better option?
im not that good in electronics though. :/
a lil help would be much appreciated thank you in advance!
huhhhhh?
User avatar
sikheadzraf
 
Posts: 11
Joined: 31 Oct 2010, 05:32
Location: The West!
Has thanked: 5 times
Have thanks: 0 time

Re: OKKO Dominator

Postby roseblood11 » 27 Oct 2011, 15:38

Use parts that are close to those values...
47Ohm, 47nF and maybe a 3.3k and a 4.7k in series instead of the 7.8k

That's not critical at all, some parts have quite large tolerances anyway.

For this message the author roseblood11 has received thanks:
sikheadzraf (30 Oct 2011, 12:49)
roseblood11
Tube Twister
 
Posts: 1834
Joined: 23 Aug 2008, 15:21
Has thanked: 352 times
Have thanks: 315 times

Re: OKKO Dominator

Postby mictester » 27 Oct 2011, 17:29

sikheadzraf wrote:thanks for the dominator!
the only things that bothers me though is that i couldn't get a 7.5k, 51 ohm resistor & 51nF capacitor here at our place in aklan, phils.
what could be a better option?
im not that good in electronics though. :/
a lil help would be much appreciated thank you in advance!


7.5k = two 15k resistors in parallel

51R = two 100 ohm resistors in parallel

51n = two 100n capacitors in series
"Why is it humming?" "Because it doesn't know the words!"

For this message the author mictester has received thanks:
sikheadzraf (30 Oct 2011, 12:49)
User avatar
mictester
Old Solderhand
 
Posts: 2894
Joined: 11 Sep 2008, 21:29
Location: Somewhat closer to Amsterdam than before!
Has thanked: 33 times
Have thanks: 806 times

Re: OKKO Dominator

Postby grrrunge » 28 Oct 2011, 06:22

grrrunge wrote:
ezs wrote:I see you did both the OKKO & Wampler, which do you like best?


I don't know yet. I haven't played them (loud) enough to find out ;) They both transformed the Special 6 combo i have in my living room to an insane metal machine though :)

The triple wreck was faster to finish though, and its tone controls seem to be more versatile. I really like the first impression of them both though! I also built the Dr. Boogey, which is a whole other mahine. Not as tight but just as growling and aggressive.
Next on my list is the seventheaven. This month is dedicated to hi-gain builds :)


I brought them both to rehearsals yesterday. I liked the Dominator better for rythm stuff, and the Triple Wreck better for lead stuff. The Dominator seems raunchier while the Triple Wreck seems a bit fuller and smoother.

IMO the Dominator is very tight and easy to control, the tones I get from it are really well defined, and there's really very little idle hum from the pedal even though I have the gain turned up full.

If i had to go with just one, I'd go with the Dominator, but I'm glad I have both 8)
A true believer in the magic of Sherwood Forest Pedal Pirates
---
New base of operations: http://www.knucklehead.dk
User avatar
grrrunge
Diode Debunker
 
Posts: 760
Joined: 20 Mar 2010, 11:51
Location: Copenhagen, Denmark
Has thanked: 59 times
Have thanks: 207 times

Re: OKKO Dominator

Postby sikheadzraf » 29 Oct 2011, 05:38

mictester wrote:
sikheadzraf wrote:thanks for the dominator!
the only things that bothers me though is that i couldn't get a 7.5k, 51 ohm resistor & 51nF capacitor here at our place in aklan, phils.
what could be a better option?
im not that good in electronics though. :/
a lil help would be much appreciated thank you in advance!


7.5k = two 15k resistors in parallel

51R = two 100 ohm resistors in parallel

51n = two 100n capacitors in series



thank you very much guys :) anyway could i sub the ICL7660s with MAX1044? or which ic will be a better replacement? thank you
huhhhhh?
User avatar
sikheadzraf
 
Posts: 11
Joined: 31 Oct 2010, 05:32
Location: The West!
Has thanked: 5 times
Have thanks: 0 time

Re: OKKO Dominator

Postby roseblood11 » 29 Oct 2011, 10:16

max1044 is a direct replacement, but the ICL7660S is much cheaper.
Note that the max input voltage of the max1044 is 9V, the icl7660s accepts 12V.

For this message the author roseblood11 has received thanks:
sikheadzraf (30 Oct 2011, 12:49)
roseblood11
Tube Twister
 
Posts: 1834
Joined: 23 Aug 2008, 15:21
Has thanked: 352 times
Have thanks: 315 times

Re: OKKO Dominator

Postby sikheadzraf » 29 Oct 2011, 19:45

roseblood11 wrote:max1044 is a direct replacement, but the ICL7660S is much cheaper.
Note that the max input voltage of the max1044 is 9V, the icl7660s accepts 12V.

so it will work as the same as the 7660 with no sound difference then? hehe thanks! sorry for the noob question though
huhhhhh?
User avatar
sikheadzraf
 
Posts: 11
Joined: 31 Oct 2010, 05:32
Location: The West!
Has thanked: 5 times
Have thanks: 0 time

Re: OKKO Dominator

Postby euronymous0001 » 01 Nov 2011, 13:33

Image

guys,
what can I sub C8 and C23 with? :scratch: I ran out of 22uFs. TIA
euronymous0001
Breadboard Brother
 
Posts: 87
Joined: 26 Jun 2010, 04:11
Has thanked: 19 times
Have thanks: 29 times

Re: OKKO Dominator

Postby irombrus85 » 15 Nov 2011, 15:22

Hello! irombrus85 Is that Mundry's Dominatrix V1.2 and How about your Q1,Q2 ...Is it BF245 ?

I feel sorry for the delay is the same ... or you can use BF245A J201 but I used a piedini.Io attention to BF245A the first stage while the other is a J201 are personal tastes!
irombrus85
 
Posts: 2
Joined: 11 Nov 2010, 22:13
Has thanked: 1 time
Have thanks: 0 time

Re: OKKO Dominator

Postby Ted Thailand » 16 Nov 2011, 05:04

irombrus85 wrote:
Hello! irombrus85 Is that Mundry's Dominatrix V1.2 and How about your Q1,Q2 ...Is it BF245 ?

I feel sorry for the delay is the same ... or you can use BF245A J201 but I used a piedini.Io attention to BF245A the first stage while the other is a J201 are personal tastes!
Thank. Which version is your project. Can you repost this layout/PCB.
Ted Thailand
 
Posts: 9
Joined: 09 Oct 2011, 16:32
Has thanked: 2 times
Have thanks: 1 time

Re: OKKO Dominator

Postby grrrunge » 19 Nov 2011, 20:04

GodSaveMetal wrote:WOULD you please post the seventheaven?? thanks a lot!! :thumbsup


I just posted my successful build in the seventheaven thread: viewtopic.php?f=13&t=2633&p=170261#p170259
A true believer in the magic of Sherwood Forest Pedal Pirates
---
New base of operations: http://www.knucklehead.dk
User avatar
grrrunge
Diode Debunker
 
Posts: 760
Joined: 20 Mar 2010, 11:51
Location: Copenhagen, Denmark
Has thanked: 59 times
Have thanks: 207 times

Re: OKKO Dominator

Postby rasta_maleek » 29 Jan 2012, 12:37

Lets stay here to learn a little.
User avatar
rasta_maleek
Resistor Ronker
 
Posts: 258
Joined: 11 Jul 2009, 13:56
Has thanked: 64 times
Have thanks: 48 times

Re: OKKO Dominator [schematic, layout]

Postby Pefren » 16 Feb 2012, 18:30

Esorp wrote:It seems IC1 was broken and yes, the BF245As had to be rotated. Now I get sound out from there and all pots are working fine, but it lacks gain. Even with gain pot maxed it sounds like a clean booster. Why would that be?

yeah! I have same problem
What would that be? My brain is boiling....
My dominator just a bad clean booster. :slap:
Pefren
 
Posts: 1
Joined: 08 Jan 2012, 17:15
Has thanked: 0 time
Have thanks: 0 time

Re: OKKO Dominator

Postby mundry » 28 Feb 2012, 17:18

Hi, i've build the Dominatrix by using my V1.2 layout, it works ...not perfectly but it works.

there's a mistake in my layout: Q1 and Q2 must be turned 180° if you use two BF245, the position is ok if you use J201 or MPF102.

i used two BF245C but the sound wasn't good enoug (good distortion but....need more) , with two J201 the sound became pretty good,but i must test it on a good amp.
User avatar
mundry
 
Posts: 17
Joined: 14 Aug 2009, 10:04
Has thanked: 6 times
Have thanks: 8 times

Re: OKKO Dominator

Postby STRONGHOLD69 » 02 Mar 2012, 04:21

Which layout sounds better? (cause i saw some different components) Vero or Dominatrix?(maybe a stupid question :( )

mundry wrote:Hi, i've build the Dominatrix by using my V1.2 layout, it works ...not perfectly but it works.

there's a mistake in my layout: Q1 and Q2 must be turned 180° if you use two BF245, the position is ok if you use J201 or MPF102.

i used two BF245C but the sound wasn't good enoug (good distortion but....need more) , with two J201 the sound became pretty good,but i must test it on a good amp.


With bf245 sounds equal to original(the original for me need a little more gain) or with j201 it sounds more agressive like openhaus/seventheaven?
how much more gain, 20%?
Thank you
STRONGHOLD69
 
Posts: 15
Joined: 14 Feb 2012, 09:04
Has thanked: 2 times
Have thanks: 0 time

Re: OKKO Dominator

Postby mundry » 08 Mar 2012, 22:56

first i used two BF245C instead of BF245A, C should be the higher gain version of 245 but they gain less than J201.

The distortion is good with both of Jfet but with J201 recover some ...."gheddu" or in other word: a little more aggressive and compact, my dominatrix still had some problems , it sound good but a little too "closed"...it should be more puchy...more "chugga-whagga", iby made some confrontation with ironbrush i've some voltage differences on 3/4 of positive input of quad opamp.
User avatar
mundry
 
Posts: 17
Joined: 14 Aug 2009, 10:04
Has thanked: 6 times
Have thanks: 8 times

Re: OKKO Dominator

Postby marshmellow » 09 Mar 2012, 17:14

No, the A/B/C doesn't stand for gain, it denotes the IDSS current and the corresponding VGS cut-off voltage range. All three are about the same gain, only at different drain currents. So if you change from C to A without adjusting the source resistor, you will see different gains because they are at different operating points.
marshmellow
Cap Cooler
 
Posts: 456
Joined: 16 Aug 2007, 08:31
Location: Germany
Has thanked: 14 times
Have thanks: 123 times

Re: OKKO Dominator

Postby STRONGHOLD69 » 09 Mar 2012, 23:35

dominator would be perfect with a footswitch boost like OKKO Diablo.
OKKO Dominator Gain+
PS: http://www.youtube.com/watch?v=W26bGI5RX3Q
STRONGHOLD69
 
Posts: 15
Joined: 14 Feb 2012, 09:04
Has thanked: 2 times
Have thanks: 0 time

Re: OKKO Dominator

Postby mundry » 13 Mar 2012, 10:18

some photos of mine:

Image

Image

Image
User avatar
mundry
 
Posts: 17
Joined: 14 Aug 2009, 10:04
Has thanked: 6 times
Have thanks: 8 times

PreviousNext

Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: FiveseveN, jalmonsalmon, pietro_moog and 3 guests