EH - Bass Micro Synth

borislavgajic · Post by **borislavgajic** » 29 Dec 2008, 07:24

OK... I did not post here for a long period of time..........and this is what I was doing lately....

happy New Year

boris

Güero 2.0 · Post by **Güero 2.0** » 29 Dec 2008, 13:31

borislavgajic wrote:OK... I did not post here for a long period of time..........and this is what I was doing lately....

happy New Year

boris

Hi Boris,

Are you insane?

Good work man!

borislavgajic · Post by **borislavgajic** » 30 Dec 2008, 09:39

Güero 2.0 wrote:
borislavgajic wrote:OK... I did not post here for a long period of time..........and this is what I was doing lately....

happy New Year

boris
Hi Boris,

Are you insane?

Good work man!

Yes I am crazy.......but that is nothing special............thank you for compliment

and it is nothing compared to work of analogguru,Bajaman DirkH,Soulsonic,Torchy,modman...and many others posting here..............so enjoy....I will post component valyes soon..........

have a nice day.....

boris

borislavgajic · Post by **borislavgajic** » 30 Dec 2008, 12:33

here are component values.....

pot PCB is bigger then original becouse I have onlly radioohm pots........

next is boxing it up, and that is problem.....

boris

Post by **modman** » 30 Dec 2008, 13:43

Great job, Boris, terrific!

Güero 2.0 · Post by **Güero 2.0** » 31 Dec 2008, 14:06

YEAH!
I am right!
You are insane

Great work!
Big fat project!

kierc · Post by **kierc** » 24 Feb 2009, 21:17

VERY nice work!

Anyway to turn this into the guitar version?

borislavgajic · Post by **borislavgajic** » 25 Feb 2009, 14:18

kierc wrote:VERY nice work!
Anyway to turn this into the guitar version?

thanks
it works nice with regular guitar,and with bass....

...if you have schematic you can see fiew parts are different for guitar, so it is not hard to convert it.......

boris

kierc · Post by **kierc** » 25 Feb 2009, 15:03

Just saw in the other MS thread about the changes

Do you have any clearer component values? Your drawings look great but I just can't make them out very well

Thanks again!

borislavgajic · Post by **borislavgajic** » 25 Feb 2009, 15:48

use this to compare numbers......there is one mistacke....PCB with pots....down to the right ..resistor is marked 33k...should be 3k3.....

and use schematic........this was clone of old unit.....AC powered

himister · Post by **himister** » 05 Oct 2009, 11:13

Covo definitivno "preterano" iscrtana plocica. Kad si ovo radio i kako i koliko ti je trebalo vremena. Do j...!

Trans: Man, this is a kick a.. pcb. When did you made this, how and how long?

borislavgajic · Post by **borislavgajic** » 06 Oct 2009, 16:04

himister wrote:Covo definitivno "preterano" iscrtana plocica. Kad si ovo radio i kako i koliko ti je trebalo vremena. Do j...!

Trans: Man, this is a kick a.. pcb. When did you made this, how and how long?

hvala himister
pre oko godinu dana.....bio mi je original na popravci.......pa sam ga rastavio i precrtao u sitna creva.......mnooogo je skup(potovi i CA3094).....ali sljaka do jaja...i niko ga nije iscrtao do tada

bila je jedna varijanta ali iz delova tako da je bilo nekoliko plocica....i nije licilo na original............eto pa uzivaj

translation...
almost year ago.......I had original one for repair......it is expencive build...becouse of pots and hard to find CA3094-s.....but it works awesome......before this there was one project of microsynth,but diferent layout..........not like original.......this is done and running with some mods...(octave UP..switchable, and foot pedal mode.......also there is one more foot SW to engage or disengage auto filter triggering........)

it took some time, but I was like mad untill I'v finished it.........

next is tubevibe...and boss CE-1.......

cheers

boris

Da Cat · Post by **Da Cat** » 07 Oct 2009, 05:34

E, pa ovo je pravi balkanski forum

borislavgajic · Post by **borislavgajic** » 08 Oct 2009, 18:09

this is what good guts should look like

borislavgajic · Post by **borislavgajic** » 08 Oct 2009, 18:14

control board
lower right side of pcb.....resistor is 3k3......my mistake -I wrote 33k.........but you can see real one on picture and it have three red stripes........3k3

that is all folks

boris

JiM · Post by **JiM** » 08 Oct 2009, 19:48

borislavgajic wrote:resistor is 3k3......my mistake -I wrote 33k.........but you can see real one on picture and it have three red stripes........3k3

Isn't three red stripes 2k2 ?

3k3 would be orange-orange-red, and 33k would be three orange stripes.

borislavgajic · Post by **borislavgajic** » 08 Oct 2009, 20:42

JiM wrote:
borislavgajic wrote:resistor is 3k3......my mistake -I wrote 33k.........but you can see real one on picture and it have three red stripes........3k3
Isn't three red stripes 2k2 ?
3k3 would be orange-orange-red, and 33k would be three orange stripes.

thanks JiM........it is 3k3...orange orange red........you can see schem...that is in filter section.......

jazzmaster · Post by **jazzmaster** » 19 Oct 2009, 14:36

really nice work borislavgajic !!

made a partslist

Code: Select all


ehx bass microsynth partslist

parts marked with * has differences between the bass and guitar version.

resistors:
r01	68k
r02	4k7
r04	470
r05	13k
r07	2k2
r08	3k3
r09	33k
r10	10k
r11	10k
r12	7k5
r13	15k
r15	3m3
r16	27k
r17	2k7
r18	27k
r19	560
r20	3k3
r21	2k2
r22	22k
r23	47k
r24	1k
r25	22k
r26	820
r27	4k7
r29	8k2
r30	2k2
r32	390k
r33	330
r34	2k7	
r35	10k
r37	13k
r38	22k
r39	120k
r40	6k8
r41	220
r42	820k
r43	1k
r44	330k
r45	470
r46	3k3
r47	3k3
r48	10k
r49	220
r50	6k8
r51	10
r52	220
r53	47k
r54	47k
r55	3k9
r56	47k
r57	27k
r58	470
r59	470
r60	27k
r62	12k
r63	10k
r64	10k
r66	3k3
r67	820
r68	1k
*r69	12k	2k2 -> guitar
r70	22m
r71	680k
r72	1k
r73	2k2
r75	3k3
r76	8k2
r77	47k
r78	1k
r79	3k3
r80	8k2
r81	47k
r82	1k
r83	3k3
r84	8k2
r85	47k
r87	330k
r88	47k
r89	4k7
r90	1k
r91	470
r93	3k3
r94	820
r95	4k7
r96	47k
r97	1k
r98	47k
r99	47
r100	22k
r102	8k2
r103	820
r104	1k
r105	1k
r106	15k
r107	5k6
r108	1k
r109	12k
r110	4k7
r111	680


potentiometers:

r06	100klin	guitar
r28	100klin	octave
r31	100klin	trigger
r36	100klin	square wave
r61	100klin	sub octave
r65	100klin	stop frequency
r74	100klin	sweep rate
r86	100klin	resonance
r92	100klin	start frequency
r101	100klin	attack delay


trimmers:

r03	10k	pre amp gain
r14	100k 	squelch

capacitors:

c01	0.1
c02	0.022
c03	0.0022
c04	0.47 tant
c05	0.0018
c06	1uf el
c07	4.7uf tant
*c08	2.2uf el	1uf el -> guitar
*c09	1uf el		0.47 el -> guitar
*c10	0.1		0.056 -> guitar
c11	1uf tant
c12	0.47 tant
c13	0.082
c14	1uf el
c15	0.047
c16	4.7uf el
c17	0.0033
c18	0.1
c19	4.7uf tant
c20	4.7uf tant
c21	0.1
c22	0.0033
c23	1.0 el
c24	0.082
c25	0.0033
c26	0.0033
c27	0.0033
c28	10uf  tant
c29	1uf tant
c30	10uf tant
c31	100uf/35v el
c32	10uf/25V el
c33	10uf/25V el

diodes:
d01-d16	1n914
d17	1n5235 6.8v zener
d18	1n5235 6.8v zener
d19	1n914
d20	led
d21	1n961b 10v zener
d22	1n914
br01	w02m bridge rectifier

ics:
a01	rc4558
a02	rc4558
a03	rc4558
a04	rc4558
a05	rc4558
a06	rc4558
a07	rc4558
a08	ca3094
a09	rc4558
a10	ca3094
a11	ca3094
a12	ca3094
a13	ca3094
a14	ca3094
a15	rc4558
a16	rc4558
a17	cd4013
a18	ca3094

transistors:
q01	2n5087
q02	2n4302
q03	2n5087
q04	2n5088
q05	2n5088
!q05	2n6100 (same part id, but on the powersupply!)
q06	2n5088

only 4 components vary from each version. so we could add a switch to choose between bass and guitar synth.

greets
jazzmaster

borislavgajic · Post by **borislavgajic** » 21 Oct 2009, 08:35

thanks man!

I did not know .....all those parts go in it???...wow

boris

uncleboko · Post by **uncleboko** » 21 Oct 2009, 13:15

Microsynth problem - start frequency point is fixed by start frequency slider, so when triggered the sweep will always rise/fall to this point, which can be boring

Better to control start frequency point from note strength - not easy. Others are trying to do this.