EMS Synthi A Clone
Projecttitel: EMS Synthi A Clone
Status: IN PROGRESS
Startdate: September 2014
Duedate: Late 2017
Manufacture link:
status:
all pcbs are completed but untested,
case is in progress,
open: powersupply and mounting of all parts inside the case, testing, calibration
modification later
Children pages
Panel here:
http://www.muffwiggler.com/forum/viewtopic.php?t=65022
pcbs here:
Case:
http://www.explorer-cases.de/explorer-cases-laptop-koffer-4412-b-c.html
dosn´t fit with my panel
BOM parts dealer:
http://www.williges-elektronik.de/
http://www.sequencer.de/synthesizer/viewtopic.php?t=70270&p=744735
further builder/mods
http://www.hinton-instruments.co.uk/ems
http://monopole.ph.qmul.ac.uk/~thomas/synthdiy/vcs3project.htm
http://www.sequencer.de/synthesizer/viewtopic.php?f=13&t=70270&hilit=vcs3+sammelbestellung&start=25
http://anothersynthiclone.blogspot.ch/
http://spanishsynthiclone.blogspot.de/2013_05_01_archive.html
manual
Die schwer zu beschaffenden Bauteile kann man durch aktuelle Teile ersetzen.
Für die 2C746 nimmt man den LM394, der TAB101 kann durch einen CA3046 ersetzt werden (wenn man dazu einen passenden Adapter auf Lochrasterplatine bastelt).
Für die ME9002 (in der Bucht, aber teuer!!!) nimmt man den BSX20, den MFC6070 gibt es auch in der Bucht (acpsurplus).
Den TAB101 bekommt man noch bei littlediode.com (habe ich auch schon bestellt).
Ich habe alle Transistoren bei http://www.williges-elektronik.de bestellt, und die Lieferbarkeit wurde mir bestätigt (kann aber noch etwas dauern, da momentan nicht alle Teile am Lager sind).
Einige Transistoren kannst du auch bei Derek Revell kaufen, aber sie sind billiger, wenn man beim Händler bestellt.
Die Diode DK10 kann durch eine beliebige Ge-Diode ersetzt werden, z.B. 1N60, AA143, 1N34A,...
Reverb:
die 1er Serie ist nicht im Vertriebsprogramm.
Die 8er Serie ist äquivalent ABER hat 3 Federn und damit einen deutlich höheren Qualitätsstandard.
Die entsprechende accutronics ist sofort lieferbar und hier zu finden: http://www.tubeampdoctor.com/catalog.php?product_search=BC2D1B
Matrix:
Part |
| Quantity |
| source | ordered | price w.shipping |
|---|---|---|---|---|---|---|
Panel |
| 1 |
| ca.170 | ||
pcbs |
| kit (3pcbs) |
| 85€ | ||
Ghielmetti matrix 20x20 Type 621 | ghielmetti.ch | 1 |
| new
20 pins | 370€
32€ | |
Joystick |
| 1 |
|
| 25€ | |
speaker |
| 2 |
| 15€ | ||
reverb tank 1BC2D1B |
| 1 |
| http://www.tubeampdoctor.com/catalog.php?product_search=BC2D1B |
| 30€ |
pcb connector 32way |
|
|
|
| 10€ | |
edge connector |
|
|
|
| -- | |
powersupply parts |
|
|
|
|
| 30€ |
Vernier Dials 45KN100 |
|
|
| 45KN100 mouser | 125€ | |
add. pcb |
|
|
|
| 30€ | |
pots and switches, midi, lamp, fuse holder, power jack, headphone |
|
|
| USA import, banzai | 130€ | |
powersupply |
|
|
| DIY |
| 25€ |
case |
|
|
| DIY | 25€ | |
screws, THT parts except trannys |
|
|
|
| 50€ | |
knobs |
|
|
|
|
| 85€ |
BNC jack female |
|
|
| tue : 1-1337452-0 | (X) |
|
|
|
|
|
|
|
|
|
|
|
|
| TOTAL | 1237€ |
ICs/Trannys | quantity | avaibilty | sources |
| example | ordered | price w. shipping |
|---|---|---|---|---|---|---|---|
Tip3055 | 2 | normal |
|
| banzai | 1,20 | |
DK10 | 6 | rare | ebay | use any small signal diode like OA47, 1N34A or 1N60 etc, | banzai 1n34a | 1N34A | 3€ |
BFY51 | 2 | rare | ebay |
| 15€ | ||
AC153K | 2 | rare/normal |
|
| ebay | 5€ | |
AC176K | 2 | normal |
|
| banzai | 3,34€ | |
2N5461 | 1 | normal |
|
| banzai | 1,43€ | |
2N5163 | 6 |
|
| or use BF245C Vp 3,4V | ebay | BF245C | 7,50€ |
2N4288/BC258 | 30 |
|
| or use BC214L, BC258 | ebay | BC258B | 60€ |
2C746 | 2 | ultra rare |
| or use LM394CH or 2N2916 = pin compatibe use 2x 2x BC169 (epoxy together) | http://www.williges-elektronik.de/lm394ch-japan-schaltkreis.html | ca15€ | |
TAB 101 | 1 | ultrarare |
|
| NOS 10€ | ||
ME9002 | 6 |
|
| or 2N2369 | http://www.ebay.de/sch/i.html?_from=R40&_sacat=0&_nkw=me9002&rt=nc&LH_PrefLoc=2 | 2N2369 | 6 |
MFC6070 | 1 |
|
|
| http://www.amazon.com/American-Microsemiconductor-MFC6070/dp/B001HFAVEM | 30€ | |
2n5172 | 57 |
|
|
| banzai - mouser ab 100stück | homestock | ebay/mouser a 0,8€
|
|
|
|
|
|
|
| total around 160€ |
|
|
|
|
|
|
|
|
Potis:
amount | value |
|
|
|---|---|---|---|
2 | 1k lin |
|
|
13 | 10k lin |
|
|
18 | 5k log |
|
|
3 | 1m log |
|
|
|
|
|
|
|
|
|
|
Panel:
Build notes
source: https://www.muffwiggler.com/forum/viewtopic.php?t=65022&start=700
figured out the VCO shape cv via the patchbay problem I was having, with input from Derek, who's been really nice with helping me troubleshoot stuff. You need to remove resistors R197, R226 and R260 from the Z PCB and replace with wire jumpers. Then remove the wires connected to the wipers of the 3 shape pots, and attach a 68K resistor to VCO 1's wiper, and 36K resistors to VCO 2 and 3 wipers. Then attach the wires that were attached from the pcb, and the wires from the patch bay to their respective resistors. Then you'll have working shape controls via the knobs and the patch bay.
The On and Off pot wiring is corrected as so -
so basically you're just switching the On and Off pots.
Other knobs that are indicated wired backwards according to the wiring diagram - in other words the "1" is on the wrong side are
Attack
Decay
filter response (resonance)
output filters
Channel 1 & 2 output levels
source: https://www.muffwiggler.com/forum/viewtopic.php?t=65022&start=700
how to bugfix: https://diysynth.wiki.dsl-man.de/wiki/spaces/SKM/pages/336101402/How+to+bugfix
non commercial pages, all infos are best can do without warranty, without liability.