e-licktronic Forum

jeroenbvo

Part 2:

http://secretlifeofsynthesizers.com/rol ... or-update/

jeroenbvo

Interesting article Gihaume. Although I don't really agree with their statement: " If you put a standard 2SC828-R into a TR-808 in place of the noise selected part the sound completely changes. " I can say that mine sounds pretty damn close to an original. Maybe I accidentally, by luck pla...

jeroenbvo

Hi Echo, It was more changes because Mouser ran out of stock. Carbon or metal resistors for the analog parts doesn't matter. The original was mainly carbon resistors 5% anyway at that time. Regarding the Capacitors, 50V or 100V no issue either. As long as they stay above 16V as that is the highest v...

jeroenbvo

** Bump **

Curious to know if it worked out for you?

jeroenbvo

Hi,

Switch S17 has only 2 of its 4 pins connected. Looking at the schematics I see the shift register is normally held low to ground. Pushing the switch makes it high.
Just bridge the contacts 1 and 3 with a ceramic or film capacitor <1nF.

jeroenbvo

What do you mean by double pressing? It has bounce?
Put a capacitor <1000pF to ground over the contacts.

I had an encoder doing that on the Nava, the caps solved it. See my post here: viewtopic.php?f=24&t=1005

jeroenbvo

Hi, Due to the size of the pcb, it is in my opinion not worth buying a pcb holder. I made both thee yocto and the nava, just using my cutting mat. Flux vs IPA. Flux cleaner has IPA in it. I use both, first clean the majority with flux cleaner and a brush. Then clean up the remainder of the residue w...

jeroenbvo

It's the resistor ladder of the DAC. You want it as precise as possible to have the closest linear proportion between your analog output value and the digital input value. It's why at the start Vincent has you measure 5 x 10K resistors that are as close as possible to the 10K. Now, I don't know how ...

jeroenbvo

Hi Vincent,

Great news!

I suppose with Order Number you mean the order reference on the invoice? Because for the Nava it seems to differ from what I saw in the order history on your site.
Anyway I have filled the gdoc, looking forward to the mod.

Thanks!

jeroenbvo

Yes that is correct.

Bass Drum
C8
C9

Low Tom
C21
C22
C23

Mid Tom
C35
C36
C37

High Tom
C98
C99
C100

Should be the list.

Search "Tantalum" in the Nava forum, there was already a tread about it.

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