[SHIPPING] E.A.S. "miss10" VCO and VCF/VCA!!!

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E.A.S.
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[SHIPPING] E.A.S. "miss10" VCO and VCF/VCA!!!

Post by E.A.S. » Wed Jul 13, 2011 5:35 pm

UPDATE:As of late I've had quite a few requests both on and off forum for another run of the 'Miss 10' VCF and VCO pcb. So I am opening orders for a Second and perhaps LAST run. Im making a few modifications to the layout to allow more standard transistor pinouts to be used also there will be euro power connectors on this run. There may be a few more changes made but those are the only that are set in stone.

Note: My costs have gone up slightly for manufacture and shipping. so the cost has gone up slightly. Now, $25 each, shipped anywhere. I'm hoping this isn't a deal-breaker for you guys!

-Mike



There are two seperate boards,
First is the VCO
It can be built like original or you can build it up with trim-able v/oct and temperature compensated resistors.

Second is the VCF/VCA

This pcb is based on the original "korg35" version of this filter.
On this PCB I've made accommodations for switching the Mode from low pass to high pass, with either jumpers or via a double pole double throw switch.

This board also includes the "single transistor" vca from the ms10.

Essentially what you get is the entire audio signal chain of the miss10!! (minus noise)

If you are Interested these are $25.00 usd each. including shipping anywhere.

the boards are extremely high quality, ROHS compliant 2 layer board, with solder mask and white silkscreen.
Size is 2.5"x 3.8"

Payment by paypal to michael (dot) alan (dot) schmidt at gmail (dot) com

At the same email as above send me your order and include,

quantity of each type
muff-name
real name
shipping address

Image
E.A.S. "Miss ten" partially assembled vcf/vca pcb by itsfatmike, on Flickr



----------------------------------------------------------------------------------
If building the VERSION 2 PCB the build documentation is HERE.

Here is the "miss10" (a little word-play,on the 70s japanese synth) I've been working on lately. currently all pcbs
(vco, lp/HP vcf w/vca , noise, mg, hadsr, even keyboard and psu pcbs)

Heres a look at the vco.

Image
production vco pcb 2 by itsfatmike, on Flickr
Image
production vco pcb by itsfatmike, on Flickr
parts placement.
Image
vco parts placement by itsfatmike, on Flickr
schematic.
Image
MISS10 VCO w/ TEMPCO option. by itsfatmike, on Flickr

VCO v1.1 Bill of materials.
---------------------------------------------------------
C1...... 6200p.....polystyrene
C2...... 100p.......ceramic
C21..... 0.1uf......
C22..... 100uf/16v....electro
C23..... 10uf/16v......electro

D1....... 1N4148
D2....... 1N4148
D3....... 1N4148
D4....... 1N4148
D12...... 1N4148
D13...... 1N4148

F1......... 2SK30A (O)
F3......... 2SK30AGR

IC1....... TL081
IC4....... TL081
IC6....... LM4558

I use 1% metal film 1/4w for all resistors unless otherwise noted.

R.......... 22M
R9........ 10M
R11...... 10K
R12...... 10K
R13...... 2.2K
R15...... 100K
R16...... 100K
R19...... 33K
R20...... 1.5M
R21...... 10M
R48...... 560K
R70...... 100K
R73...... 427R
R75...... 427R
R76...... 56K
R77...... 10K
R78...... 4.7K
R79...... 6.8k
R80...... 43K
R81...... 330K
R82...... 4.7k
R83...... 100K

These three are 0.1% 1/4w resistors.
I used mouser part number, 71-CMF55100K00BHEB

R84...... 100K
R85...... 100K
R86...... 100K

R v/oct...110K

Use 'a' for non scalable, non temperature compensated v/oct(original to 10/20)
Use 'b' for scalable, temperature compensated v/oct (original to the 50)
R10a...... 5.11K
R10b...... 43.2K

R18a...... 110K
R18b...... 100K

R8a........ 100R
R8b........ 1K +3000PPM

All 'RS' resistors need to be 0.1% tolerance for accurate octave switching.

I used mouser part number, 71-CMF55100K00BHEB.

RS1....... 100K
RS2....... 100K
RS3....... 100K
RS4....... 100K
RS5....... 100K
RS6....... 100K
RS7....... 100K
RS8....... 100K

SW1 SCALE (OCTAVE).... SP4T
SW2 WAVEFORM... SP4T

TR1........ 2SA933AS (mouser p/n... 755-2s933ASTPS)
or 2sa733
TR2........ 2sc1740s (mouser p/n... 755-2sc1740STPS)
or 2SC1685
TR3........ 2sc1740s (mouser p/n... 755-2sc1740STPS)
or 2SC1685
TR4........ 2SC1583 or hand matched EBC discrete trasistors

VR2........ 100KB TRIM
VR4........ 100KB TRIM
VR6........ 100KB
VR9........ 100KA
VR10...... 100KA
VR11...... 1M
VR100.... 10K (use jumper in place of VR100 if building non-scalable version)

---------------------------------------------------------------------------
VCF/VCA!!!

PCB
Image
E.A.S. "Miss ten" production vcf/vca pcb by itsfatmike, on Flickr
PARTS PLACEMENT

VERY IMPORTANT, the KTR4 silkscreen is reversed!!! just reverse the placement
of the FET into the pcb. Filter will not pass audio if this transistor is in backwards!!

Image
vcf-vca parts placement by itsfatmike, on Flickr

SCHEMATIC
Image
MISS TEN VCF VCA schematic by itsfatmike, on Flickr

VCF/VCA WIRING DIAGRAM.
Image
vcf-vca wiring diagram by itsfatmike, on Flickr

Instructions for anyone wanting to use two boards and build a ms20 style dual filter.

On the first filter you'll want to leave off the vca.

Do not install the components beyond R88 on the schematic.
This is not speaking of parts designators but referring to the signal path
A.k.a Do not install the top right section of the schematic (R88 and beyond)

Install a jumper in place of R67.

Connect a wire from the cw lug on the peak control (same pot lug as yellow wire on the wiring diagram) on the first vcf/vca to the input on the second vcf/vca.



E .A.S. "MISS TEN" VCF/VCA B.O.M.

C11....... 10uf/16v radial electro
C12....... 0.0033uf axail polystyrene (mouser p/n 23PS233)
C13....... 0.001uf axial polystyrene (mouser p/n 23PS210)
C14....... 10uf/16v radial electro
C15....... 0.001uf radial polystyrene (mouser p/n 23PW210)
C16....... 10uf/16v radial electro
C17....... 1uf/50v radial electro
C18....... 100p ceramic disc
C19....... 33uf/16v radial electro
C20....... 10uf/16v radial electro

D9......... 1N4148 (mouser p/n 78-1N4148-TAP)
D10....... 1N4148 (mouser p/n 78-1N4148-TAP)
D11....... 1N4148 (mouser p/n 78-1N4148-TAP)

IC5....... LM4558 (mouser p/n 513-NJM4558D)
IC7....... LM4558 (mouser p/n 513-NJM4558D)

KTR1..... 2sc1740s (mouser p/n... 755-2sc1740STPS)
or 2SC1685

KTR2..... 2sc1740s (mouser p/n... 755-2sc1740STPS)
or 2SC1685

KTR3..... 2sc1740s (mouser p/n... 755-2sc1740STPS)
or 2SC1685

KTR4..... J201 or BF245A
VERY IMPORTANT, the KTR4 silkscreen is reversed!!! just reverse the placement of
the FET into the pcb. Filter will not pass audio if this transistor is in backwards!!


KTR5..... 2SA933AS (mouser p/n... 755-2s933ASTPS)
or 2sa733

TR9....... 2sc1740s (mouser p/n... 755-2sc1740STPS)
or 2SC1685

For all resistors I use 1% metal film 1/4w

KR1....... 47K
KR2....... 680R
KR3....... 470K
KR4....... 10K
KR5....... 820R
KR6....... 10K

R47........ 100K
R49........ 1K
R50........ 100K *

*If Using this filter with modular levels, i.e. 10v pp Install 30K. This reduces the +- 5v to the 1.5v pp that the filter wants to see.

R51........ 470R
R52........ 100K
R53........ 100K
R54........ 100K
R55........ 15K
R56........ 18K
R58........ 220R
R59........ 47R
R60........ 220R
R61........ 5.1K
R62........ 2.2K
R63........ 4.7K
R64........ 270K
R65........ 1K
R66........ 100K
R67........ 150K
R68........ 470K
R69........ 680K
R71........ 220R
R72........ 1M
R87........ 100K
R88........ 3.3K
R89........ 1K
R90........ 1M
R91........ 470K
R471...... 100K
R561...... 0 ohms or link
R591...... 47R

SW1....... DPDT

VR3........ 100KB TRIM (mouser p/n 858-67WR100KLF)
VR12...... 100KB
VR13...... 10KB
VR14...... 100KA
VR15...... 100KA
VR100.... 10KB


-Mike
Last edited by E.A.S. on Wed Sep 26, 2012 8:25 pm, edited 72 times in total.

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Low-Gain
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Post by Low-Gain » Wed Jul 13, 2011 6:04 pm

:sb: :sb: :sb:

Would love to try one of these out!
Nicely done!

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cerebrosis
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Post by cerebrosis » Wed Jul 13, 2011 6:08 pm

Good job.

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Post by mikecameron » Wed Jul 13, 2011 6:09 pm

Will you be offering boards for sale? Definitely interested!

mckenic

Post by mckenic » Wed Jul 13, 2011 6:20 pm

Cool!

Looks like a nice and simple layout :tu: Hope you might be offering these for sale some time!

Welcome to Muffs Mike!

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Post by boothnavy » Wed Jul 13, 2011 8:08 pm

FTW this would be a cool DIY project if the PCBs become available... just sayin'...
Last edited by boothnavy on Wed Jul 13, 2011 11:09 pm, edited 2 times in total.
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Post by E.A.S. » Wed Jul 13, 2011 10:44 pm

I've made the vcf switchable between lopass and hipass,
so if you desired you could build 2 filters and have lopass into a hipass
ala the ms20 and then flip a switch and have lopass into lopass
or even vise versa.

good times.

-Mike
Last edited by E.A.S. on Sun Jul 31, 2011 6:32 pm, edited 1 time in total.

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sanders
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Post by sanders » Thu Jul 14, 2011 12:34 am

Wow, these look great!

Do you plan to post the artwork? I've had a dual MS20 VCF in my box of projects for a couple years now just waiting for VCOs.

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Post by Dego » Thu Jul 14, 2011 1:25 am

Is it Hz/V ?

Looks good :tu:

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Post by iopop » Thu Jul 14, 2011 1:25 am

Nice work!

It looks like it does not use a tempco or an obsolete transistor pair? (The black 5-pin at the top could otoh be the transistor pair?)

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Post by numan7 » Thu Jul 14, 2011 1:30 am

:loves: what a lovely little missy! :sb:

cheers,
7n7
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Post by falafelbiels » Thu Jul 14, 2011 3:24 am

Nice little project you have there.

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Post by gwaidan » Thu Jul 14, 2011 3:29 am

Looks great. That is the largest styro cap I've ever seen tho :eek:

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mamonu
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Post by mamonu » Thu Jul 14, 2011 7:04 am

looks interesting.... i will be watching for further news on this....

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Dego
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Post by Dego » Thu Jul 14, 2011 10:12 am

iopop wrote:Nice work!

It looks like it does not use a tempco or an obsolete transistor pair? (The black 5-pin at the top could otoh be the transistor pair?)
Its obsolete:

SC1583 G or F

http://www.korganalogue.net/korgms/serv ... manual.pdf

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Post by E.A.S. » Thu Jul 14, 2011 10:28 am

Dego wrote:Is it Hz/V ?

Looks good :tu:
It has inputs for Hz/v as well as Oct/v just like the original.
It also has connections for pitch pot, octave switch, pwm input/pot, as well as tri, square, saw output.

The polystyrene cap is a 0.0062uf at 600v I could have used a lower voltage
But I had this one on hand.

The dual transistor is a 2sc1583, there are other parts you can use, I.e. nte42.
You could also use hand matched transistors if you wanted.

I laid the board out to use the original parts. Any substitutions you make, you would want to look at the data sheets.

-Mike Schmidt

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Post by Peake » Thu Jul 14, 2011 4:28 pm

I'd buy a few boards. Please keep us updated. Thanks for the project!

(Are the traces hidden beneath layers? Some solder pads look like they aren't connected to anything else!)
This is not the place I'd imagined it to be.

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Post by keninverse » Thu Jul 14, 2011 4:37 pm

I'm in for a couple of VCOs....and any of the other boards.

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Post by emdot_ambient » Thu Jul 14, 2011 8:38 pm

:mrgreen: Everybody wants you to do a PCB run. Come on...you know you want to... :mrgreen:

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Post by iopop » Fri Jul 15, 2011 3:03 am

His biggest mistake ever, now he will be stuck in doing pcb runs and that miss10 will never see the light of day... ? :hide:

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Post by E.A.S. » Fri Jul 15, 2011 8:24 am

Well, I'd love to do runs of all of the boards, as you know though, the more boards we have made the cheaper they get.

If I do start doing runs of all of the boards, I'd more than likely do one or two types of board at a time. To keep overhead low, and it would also keep things simple.

Also remember these are essentially building blocks to build the "miss10", the circuit linked by dego above. So no circuit additions have been made.

-Mike

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E.A.S.
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Post by E.A.S. » Fri Jul 15, 2011 8:31 am

Peake, the picture above are both of the top layer of the 2 layer boards.

As you probably imagine, not much would happen if those were the only traces 8_)

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Post by brother303 » Fri Jul 15, 2011 9:05 am

Hi,

I´m in for two boards if it comes to a run.

Thanks lot,cool project! :tu:

Cheers
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Post by rosch » Fri Jul 15, 2011 11:47 am

awesome project, to do the miss10!
and the idea of doing one or two types at a time is ++awesome!
thread already bookmarked...

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Post by theglyph » Fri Jul 15, 2011 12:05 pm

Wow a fellow synth DIYer here in Jacksonville! :sb:

Where is your shop located? We should meet up and get into some nerd talk!

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