New buchla 208 card 12,demo sound diy or built pcb no MB mods

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boops
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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Fri Apr 24, 2020 2:35 am

@Klamgbauer

I' ve answered ALL your private mails,you even not take the time to read the entire thread asking me bom ,3 differents working, in the first page
Parts of the schematic needed is in the first page. the LME 49740 can be replaced by a simple TLO74 (modular synthesis page link ,first page).
DIY =read data sheet,ask simple questions here in the forum and his community etc
I ve built a ton of really more complex diy projects without schematic ,example 248r and almost all the series Roman buchla 200r,the papz tool box etc etc.

There is always someone to complain ,thats life.

PCB IN stock
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by Minimoog56 » Sun May 31, 2020 8:10 am

Received my pre-built card 12 and installed. Pretty straightforward. You have to be careful with the reverb pan install. The overall volume of the easel was increased 25% with a good usable sweep of reverb though about 90% of the sweep. The card can get peaky at higher volumes. Overall very pleased with the improvements.
Beatniks and Bongos/Bagels and Bongos/Buchlas and Bongos...

de gustibus....

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Sun May 31, 2020 5:15 pm

you can reduce the gain of each stage with lower resistor value
example if you have a R19/R42 330k ,you can reduce up to 150k(bom value)
R17 and R13 for the others stages (sum mix,reverb) can be ajusted too.
Attachments
4A105FE3-2334-4382-AC4E-1EB255FF3DE7.png
2CA07D49-6E96-4DCD-A406-8438AFF9B904.jpeg
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Sat Jun 13, 2020 5:27 am

pcb in stock
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by AlanP » Wed Jun 17, 2020 4:27 pm

For the four power transistors, the text side should face towards the three electrolytic caps, correct? :)

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by AlanP » Sun Jun 21, 2020 5:19 pm

Also, on the original Card 12, noisy and quiet ground are bridged, should I bridge them on the New Card 12? I don't think they're joined on any of the other cards or the motherboard, as stock.

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Wed Jun 24, 2020 5:26 pm

AlanP wrote:
Sun Jun 21, 2020 5:19 pm
Also, on the original Card 12, noisy and quiet ground are bridged, should I bridge them on the New Card 12? I don't think they're joined on any of the other cards or the motherboard, as stock.
Which psu do you use ?
the best is to keep the Q and N separate up to the card 12.
Last edited by boops on Thu Oct 15, 2020 5:32 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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Wed Jul 08, 2020 9:32 am

up
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Sun Aug 02, 2020 5:54 pm

up
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Fri Aug 21, 2020 3:57 am

Important info
Dont forget to short N and Q grounds pin 15 /pin16 on molex card 12 .
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Sat Sep 26, 2020 3:09 am

Up
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by sendepause » Wed Sep 30, 2020 4:14 am

Hey guys, I need some help. D
oes any has a mouser link for the two Idc male and female connector for J2/J3? No idea how to find these....

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by madtextureenvy » Thu Oct 08, 2020 11:23 am

sendepause wrote:
Wed Sep 30, 2020 4:14 am
Hey guys, I need some help. D
oes any has a mouser link for the two Idc male and female connector for J2/J3? No idea how to find these....
If you go to Dave Brown's page, you will find there a PDF of the BOM he created. The parts you seek will be listed in the BOM.

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by HipDestroyer » Sun Oct 11, 2020 12:26 pm

Finally about finished mine. This board makes a WORLD of difference. The whole instrument is elevated. Fantastic work boops!!!!!!!!!!

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Thu Oct 15, 2020 5:30 am

Many thanks
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by sendepause » Sun Oct 18, 2020 3:06 pm

Quick stupid question:
I forgot to order some 1% resistors but have enough 5% ceramics. What do you advice: use 5% or order 1%?
It’s the small values like 1R2, 47R, 4R7. Stuff like that. Could I do harm? Harm the sound quality?

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Wed Oct 28, 2020 3:37 pm

sendepause wrote:
Sun Oct 18, 2020 3:06 pm
Quick stupid question:
I forgot to order some 1% resistors but have enough 5% ceramics. What do you advice: use 5% or order 1%?
It’s the small values like 1R2, 47R, 4R7. Stuff like that. Could I do harm? Harm the sound quality?
5% are fine ,little more noisy sometimes,but carbon composition has a better sound for my ears.
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Sat Nov 14, 2020 5:38 am

Up of the lockdown
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Mon Dec 21, 2020 3:18 am

Up of chistmas
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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Re: New buchla 208 card 12,PRICE DOWN diy or built pcb no MB mods

Post by boops » Sat Feb 06, 2021 3:22 pm

Price down ,as I ve ordered a bigger batch (for the 208X) now 25eu

viewtopic.php?f=17&t=243688
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by boops » Tue Feb 16, 2021 5:19 am

Forget to write,blue or black pcb color available
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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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by LED-man » Mon Feb 22, 2021 6:25 am

R4 and R6 can be easily installed wrong.
is R6 on the bottom of R8 or is this R4 ?
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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by thecivildefense » Mon Feb 22, 2021 3:06 pm

LED-man wrote:
Mon Feb 22, 2021 6:25 am
R4 and R6 can be easily installed wrong.
is R6 on the bottom of R8 or is this R4 ?
I was also wondering this. Here's how I did it but not testing until later this week so not sure if I'm right. :
IMG_3900.JPG

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Re: New buchla 208 card 12,demo sound diy or built pcb no MB mods

Post by LED-man » Mon Feb 22, 2021 4:10 pm

Thanks
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