BAJA Small Clone

WormBoy · Post by **WormBoy** » 28 Feb 2008, 10:54

Incredible, how you could squeeze that in a B enclosure (and it looks great)!

marmora wrote:Is there a way to make this into a dual chorus? As in, with a switchable second rate and depth.

You can simply have a second set of pots and switch between them with a 3PDT toggle. Switch leg 2 of the rate pot, and legs 2 and 3 (or perhaps only leg 2?) of the depth pot. No need for a second LFO.

bajaman · Post by **bajaman** » 28 Feb 2008, 20:52

You can simply have a second set of pots and switch between them with a 3PDT toggle. Switch leg 2 of the rate pot, and legs 2 and 3 (or perhaps only leg 2?) of the depth pot. No need for a second LFO.

this should work fine, but you will have to use a bigger enclosure.

bajaman

Guitar_machine · Post by **Guitar_machine** » 23 May 2009, 23:15

You can simply have a second set of pots and switch between them with a 3PDT toggle. Switch leg 2 of the rate pot, and legs 2 and 3 (or perhaps only leg 2?) of the depth pot. No need for a second LFO.

You can only use the 3pdt should not be a 4pdt?

Ed22 · Post by **Ed22** » 17 Jul 2009, 20:09

Hi,

just finished my baja small clone. nice layout, works fine.
i have just one problem that can be fixed i'm sure : the speed knob is...too speed

. I mean the minimum is already fast. When set to the max, the effect dissappears, as it is really too fast! i compared it to the video-test posted on proguitarshop: the minimum speed on my smallclone corresponds to the 2 hours setting on the EH. I have to fix that because this baby does really nice sounds at low rates...
anyone knows how to fix it?

thanks,

cheers

Ed.

Ed22 · Post by **Ed22** » 18 Jul 2009, 12:43

Ok,

i've changed the 2u2 tantalum cap with a 3u3 electrolytic cap near the RATE pot. Now it works great to me. less speed. Really huge sound

. more sparkling than with my Boss CE2 that is sweetier. Sounds different but as good.
Can anybody tell me the difference between a tantalum and a electrolytic cap? in sonic terms?

thanks Baja for the layout and the PCB transfer file. I really like the 1590B enclosure, even though it's sometimes not quite easy to fit all the stuff in it.

Ed.

HEAD · Post by **HEAD** » 12 Aug 2009, 21:28

Hi,

just wanted to say thanks. Brilliant project. Works like a charme and does easily fit into a B enclosure.
Here are my two builds:

Cheers
Helge

slash555 · Post by **slash555** » 31 Aug 2009, 15:02

hi bajaman, i'm noob in this area so a have couple of questions!
i made two small clones on your layout and none of them are working. sound is pasing trough but no chorus effect. probably same error on both of them.

i'm looking on tonepad schematic and i wonder about diode direction. negative pole on 1n914 i facing Q1 (5087), and on your layout + sign is twords Q1. it's same for D2. maybe i dont know how to read this

here's some voltages from transistors

Q1 5087
E 5,51
B 4,67
C ground

q2 (next to 4047)
E 7,25
B 7,86
C 7,9

q3
E 4,95
B 5,49
C 7,92

are potentiometer's 3 2 1 (like on tonepad layout) or 1 2 3?
what's trimmer for?

station · Post by **station** » 31 Aug 2009, 16:53

Just wanted to say: HEAD - that etch is badass! clean lines, good design, very nice indeed.
OK -back to tech talk.

bajaman · Post by **bajaman** » 31 Aug 2009, 20:50

i made two small clones on your layout and none of them are working

Please post some pictures of your component placement

cheers
bajaman

slash555 · Post by **slash555** » 01 Sep 2009, 07:47

bajaman wrote:
i made two small clones on your layout and none of them are working
Please post some pictures of your component placement
cheers
bajaman

here!

bajaman · Post by **bajaman** » 01 Sep 2009, 12:47

Apart from a 100n capacitor ( should be 10n) I cannot see any obvious errors - the diode orientations are correct

The control pots are supposed to be mounted the other way around and under the track side of the PCB. I use a small rubber insulating stick on pad on the back of the control pots to stop them shorting out against the PCB tracks.
Double check all your component values AND check the board tracks - make sure there are no shorted traces etc.
Also make sure you have the correct transistor type - Q1 is pnp, the others are npn types.
good luck
bajaman

HEAD · Post by **HEAD** » 03 Sep 2009, 11:18

station wrote:Just wanted to say: HEAD - that etch is badass! clean lines, good design, very nice indeed.
OK -back to tech talk.

Thank you! Yeah I must admit that I'm pretty proud of the "Hydra".

Cheers
Helge

HEAD · Post by **HEAD** » 03 Sep 2009, 11:23

slash555 wrote:hi bajaman, i'm noob in this area so a have couple of questions!
i made two small clones on your layout and none of them are working. sound is pasing trough but no chorus effect. probably same error on both of them.

i'm looking on tonepad schematic and i wonder about diode direction. negative pole on 1n914 i facing Q1 (5087), and on your layout + sign is twords Q1. it's same for D2. maybe i dont know how to read this

here's some voltages from transistors

Q1 5087
E 5,51
B 4,67
C ground

q2 (next to 4047)
E 7,25
B 7,86
C 7,9

q3
E 4,95
B 5,49
C 7,92

are potentiometer's 3 2 1 (like on tonepad layout) or 1 2 3?
what's trimmer for?

Hej,

I had a similar problem. Reason was what I tried to mark in the attached file. If you have these tracks on your PCB please cut them, otherwise they can cause a malfunction like you tend to have.

Cheers
Helge

Edit: When I did a second glance on your PCB it seems to me it is indeed the problem. If I don't see it wring you have these traces on your board. Cut them! Then it should work.

Edit: I attached a gut pic of my last built.

bajaman · Post by **bajaman** » 03 Sep 2009, 11:28

i MUST update this PCB picture
apologies to all
bajaman

Crawford · Post by **Crawford** » 28 Sep 2009, 12:15

Hi,I have been a member for a while now but never posted any questions, i have made the Baja Small Clone but have problems with it, i get bypass sound but when switched on no chorus.I've used two 3904's and a 3906 for the trannies but my readings look off

3906 C=0 B=0 E=0

3904 (near CD 4047) C=9.38 B=9.37 E=.01

3904 (near 4558) C=9.4 B=.01 E=0.00

any clues? i can post pics if i learn how and more voltages if required
i've still to check all resistors in case of value errors

I have made fair no of pedals over the years and have had a great deal of success but when i encouner something like this i'm usually stumped,thanks Crawford.

bajaman · Post by **bajaman** » 28 Sep 2009, 20:57

Hi Crawford
Did you check HEAD's post ( 2 back in the thread) that may be your problem

bajaman

Crawford · Post by **Crawford** » 28 Sep 2009, 22:26

Hi,thanks for your reply,yes the traces on my board do not touch as in the thread you mentioned,i made sure they were broken at the points highlighted,as i said i'm stumped unless i have a bad chip??

bajaman · Post by **bajaman** » 29 Sep 2009, 10:05

Corrected PCB picture now uploaded
please refresh your browser
1200 dpi resolution
cheers
bajaman

members/bajaman/Baja/BAJA%20Small%20Clone/

Crawford · Post by **Crawford** » 29 Sep 2009, 11:59

Hi again,success, got it working, not sure but i turned the trimpot very slowly and there it was,chorus!!!!!!!!! and thanks for your replies and updated layout files cheers,Crawford.

bajaman · Post by **bajaman** » 29 Sep 2009, 12:22

bajaman