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

[boops]

@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

[Minimoog56]

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.

[boops]

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.

[boops]

pcb in stock

[AlanP]

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

[AlanP]

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.

[boops]

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.

[boops]

up

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up

[boops]

Important info
Dont forget to short N and Q grounds pin 15 /pin16 on molex card 12 .

[boops]

Up

[sendepause]

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....

[madtextureenvy]

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.

[HipDestroyer]

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

[boops]

Many thanks

[sendepause]

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?

[boops]

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.

[boops]

Up of the lockdown

[boops]

Up of chistmas

[boops]

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

viewtopic.php?f=17&t=243688

[boops]

Forget to write,blue or black pcb color available

[LED-man]

R4 and R6 can be easily installed wrong.
is R6 on the bottom of R8 or is this R4 ?

[thecivildefense]

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. :

[LED-man]

Thanks