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EH - Bass Micro Synth
Posted: 29 Dec 2008, 07:24
by borislavgajic
OK... I did not post here for a long period of time..........and this is what I was doing lately....
happy New Year
boris
Re: EH-BassMicroSynth-HELP
Posted: 29 Dec 2008, 13:31
by Güero 2.0
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!
Re: EH-BassMicroSynth-HELP
Posted: 30 Dec 2008, 09:39
by borislavgajic
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
Re: EH-BassMicroSynth-HELP
Posted: 30 Dec 2008, 12:33
by borislavgajic
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
Re: EH - Bass Micro Synth
Posted: 30 Dec 2008, 13:43
by modman
Great job, Boris, terrific!
Re: EH - Bass Micro Synth
Posted: 31 Dec 2008, 14:06
by Güero 2.0
YEAH!
I am right!
You are insane
Great work!
Big fat project!
Re: EH - Bass Micro Synth
Posted: 24 Feb 2009, 21:17
by kierc
VERY nice work!
Anyway to turn this into the guitar version?
Re: EH - Bass Micro Synth
Posted: 25 Feb 2009, 14:18
by borislavgajic
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
Re: EH - Bass Micro Synth
Posted: 25 Feb 2009, 15:03
by kierc
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!
Re: EH - Bass Micro Synth
Posted: 25 Feb 2009, 15:48
by borislavgajic
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
Re: EH - Bass Micro Synth
Posted: 05 Oct 2009, 11:13
by himister
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?
Re: EH - Bass Micro Synth
Posted: 06 Oct 2009, 16:04
by borislavgajic
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
Re: EH - Bass Micro Synth
Posted: 07 Oct 2009, 05:34
by Da Cat
E, pa ovo je pravi balkanski forum
Re: EH - Bass Micro Synth
Posted: 08 Oct 2009, 18:09
by borislavgajic
this is what good guts should look like
Re: EH - Bass Micro Synth
Posted: 08 Oct 2009, 18:14
by borislavgajic
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
Re: EH - Bass Micro Synth
Posted: 08 Oct 2009, 19:48
by JiM
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.
Re: EH - Bass Micro Synth
Posted: 08 Oct 2009, 20:42
by borislavgajic
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.......
Re: EH - Bass Micro Synth
Posted: 19 Oct 2009, 14:36
by jazzmaster
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
Re: EH - Bass Micro Synth
Posted: 21 Oct 2009, 08:35
by borislavgajic
thanks man!
I did not know .....all those parts go in it???...wow
boris
Re: EH - Bass Micro Synth
Posted: 21 Oct 2009, 13:15
by uncleboko
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.