Buchla 200X serie 208X build thread

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DanaFo
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Re: Buchla 200X serie 208X build thread

Post by DanaFo » Tue Feb 23, 2021 12:15 pm

fallout wrote:
Tue Feb 23, 2021 10:27 am
This thread is getting confusing quickly. Can we condense all of the BOMs / Carts into 1 post for clarity?
Yes that would be great - tbh a google doc for the details/exceptions/variants and google sheets for BoMs I think would be ideal.

Thank you again all for doing this terrible work! :love:

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Tue Feb 23, 2021 4:20 pm

fallout wrote:
Tue Feb 23, 2021 10:27 am
This thread is getting confusing quickly. Can we condense all of the BOMs / Carts into 1 post for clarity?
Don’t worry,I drive it,at the end everything on only one post ,and only one pdf ,(in my web site) the problem is that I can not edit the first post ,a new (bad )function of the forum and the boms have to be completed with the parts available now ,not in 2014 as I always find in another 208 build thread.;)
Then Your 208 will be finished the next weeks.
These first links boms infos posts are here to be commented ,and each can share with us,,like the excellent link about NSL 32SR3 vactrol at digikey.

https://www.digikey.com/en/products/det ... AlNIC6AvkA
At low current,the resistance could be fine,above 1k

JUST WAIT THE DEF BOMS POST.
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Thu Feb 25, 2021 2:59 am

Card 4 V2 mouser basket added below with ic socket ( HQ reference ) updated the 27 02 21
https://www.mouser.com/ProjectManager/P ... 9d30a1480e
Last edited by boops on Sat Feb 27, 2021 4:52 am, edited 1 time in total.
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Fri Feb 26, 2021 3:01 am

208X card 5 v2 +ic socket. Updated the 27 02 21
https://www.mouser.com/ProjectManager/P ... dbb38f5378
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Sat Feb 27, 2021 4:28 am

208X card 6 V2 the LM301 in the bom is not available at mouser,cancel it and source it at ebay by example

https://www.mouser.com/ProjectManager/P ... 6bd99ad829

A note about resistors sourcing at mouser,the day of your order .
If ref 603-CFR-25JR-52-xx 25JB
if its not available you can swap with
603-CFR-25JB-52-xx 25JR
The goal here is to have more than 10 resistors of the same ref to have the quantity discount.0,085 to 0,042 ;)
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Sat Feb 27, 2021 9:02 am

Fyi.I will you offer the details of the harware kit ,the next Tuesday.
First pics of the build
The aux /noise pcb,it’s not the easier card.
IMPORTANT NOTE R20 ON THE PCB IS R9= 47K IN THE BOM.

An simple AOP gain stage can be boosted.
If you want more gain in the fx send stage ,replace the jumper (0 ohm )soldered in (R5) by a 47k resistor,add R6 =10k,add C2 =1uF
Then your audio signal will step up with a 5,6 ratio louder .In the 208X prototype ,I didn’t need to use these parts ,it works fine with standard fx devices.

It should be like these pics before the installation on the boat 4UX
The molex 4 colored wire is connected (soldered )to the psu pcb below.
You will need mono audio shielded wires ,not for the switch ,and some heat shrinks
0BCDB5BC-4BE2-4465-9797-5CC3FEECE4A4.jpeg
242A6C3C-6A42-4CE2-B68B-E6635E65B58D.jpeg
11BAB35D-EEEC-4CC0-A858-96918EA2DCB3.png
CC301049-071E-4360-B9C5-6B706D01BCA3.jpeg
3D535E20-4C77-447D-8A3A-C09F857D3F00.jpeg
Last edited by boops on Mon Mar 01, 2021 3:42 pm, edited 11 times in total.
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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ikkini
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Re: Buchla 200X serie 208X build thread

Post by ikkini » Sat Feb 27, 2021 9:31 am

:yay:

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fallout
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Re: Buchla 200X serie 208X build thread

Post by fallout » Sat Feb 27, 2021 6:59 pm

boops wrote:
Sat Feb 27, 2021 9:02 am
If you want more gain x 5,6 ,add C2 1uf/R5 0 ohm resistor or a jumper become 47k/R6 10k .
I'm not sure I fully understand what you are trying to say.

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Sun Feb 28, 2021 2:50 am

fallout wrote:
Sat Feb 27, 2021 6:59 pm
boops wrote:
Sat Feb 27, 2021 9:02 am
If you want more gain x 5,6 ,add C2 1uf/R5 0 ohm resistor or a jumper become 47k/R6 10k .
I'm not sure I fully understand what you are trying to say.
An simple AOP gain stage can be boosted.
If you want more gain in the fx send stage ,replace the jumper (0 ohm )soldered in (R5) by a 47k resistor,add R6 =10k,add C2 =1uF
Then your audio signal will step up with a 5,6 ratio louder .In the 208X prototype ,I didn’t need to use these parts ,it works fine with standard fx devices.
03BB31F5-30D1-417C-AFF8-3799B7BF5888.png
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Sun Feb 28, 2021 3:47 am

208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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fallout
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Re: Buchla 200X serie 208X build thread

Post by fallout » Sun Feb 28, 2021 8:50 am

boops wrote:
Sun Feb 28, 2021 2:50 am
An simple AOP gain stage can be boosted.
If you want more gain in the fx send stage ,replace the jumper (0 ohm )soldered in (R5) by a 47k resistor,add R6 =10k,add C2 =1uF
Then your audio signal will step up with a 5,6 ratio louder .In the 208X prototype ,I didn’t need to use these parts ,it works fine with standard fx devices.
Thanks! That's a much better explanation.

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boops
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Re: Buchla 200X serie 208X build thread

Post by boops » Sun Feb 28, 2021 12:14 pm

fallout wrote:
Sun Feb 28, 2021 8:50 am
boops wrote:
Sun Feb 28, 2021 2:50 am
An simple AOP gain stage can be boosted.
If you want more gain in the fx send stage ,replace the jumper (0 ohm )soldered in (R5) by a 47k resistor,add R6 =10k,add C2 =1uF
Then your audio signal will step up with a 5,6 ratio louder .In the 208X prototype ,I didn’t need to use these parts ,it works fine with standard fx devices.
Thanks! That's a much better explanation.
;),I ve written the first one at the end of a long day of work and I was tied. ;)

Here the goal of this project,I love so much the NOS parts ,modern design with vintage vibes.
The 208X Mother board and the 12 daughter boards.

79CCC2F2-A988-4C70-A50A-EB7E21FFFF45.png
208X 200X modules serie ,Buchla 200 upgraded viewtopic.php?f=17&t=243688&p=3444875#p3444875
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 price down atm/
HQ small case buchla psu PCB
viewtopic.php?p=3118393#3118393
viewtopic.php?t=211862&highlight=

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Radiance2021
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Re: Buchla 200X serie 208X build thread

Post by Radiance2021 » Sun Feb 28, 2021 2:11 pm

Can't wait to start this project!

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