Check this

Miscellaneous
1

I find this and I am horny on it-aahhh

I have found all parts - but not this

http://www.analog-synth.de/synths/tr909/909bd_pcb.pdf

I will build this: But before I have a question

Whats that-maby a operation ampliefier-

Do you now whats the full name- or a second product

072

071

And this site

http://www.introspectiv.eclipse.co.uk/

I have ordert this pcbs: but I dont find this types in Germany (Reichelt)

ZTX1051A

2SC2878 (have high reverse current gain)

2SD1469    

MAX 525

NJU7304D

LM723

What meens unbufferd, what type is this

4011UB (USE unbuffered (4011 U..)device only)

4069UB (USE unbuffered (4011 U..)device only)

CAPS:

Polyester: Is this the same like Foil capacitors or is this styroflex capacitor

Polyester MKT: Is this the same like Foil capacitors or is this styroflex capacitor

I now this is much question, but when you see the partlist- its not much  ;D

2

hi Phattline

Whats that-maby a operation ampliefier-

Do you now whats the full name- or a second product

072  

071

Thats a TL072 or TL071, a standard Op-amp.

I have ordert this pcbs: but I dont find this types in Germany (Reichelt)

Hey i ordered two as well,

ZTX1051A

thats the substitute for the 2SD1496. I didn´t find a supplier as well, but i will use some Fmmt691 SMD substitutes i still have from my old TR909 clone

2SC2878 (have high reverse current gain

i think you don´t need these as the muting circuit is not used.

MAX 525  

Sample order at Maxim.

NJU7304D

i could find it only at Digikey in US.

LM723

should be avaible at Reichel (µA 723 DIL).

What meens unbufferd, what type is this  

4011UB (USE unbuffered (4011 U..)device only)

4069UB (USE unbuffered (4011 U..)device only)

I didn´t do a search on these one, but the UB is just a special variation of the B type. It seems not so common though

Polyester: Is this the same like Foil capacitors or is this styroflex capacitor

i also would like to know this.

Polyester MKT: Is this the same like Foil capacitors or is this styroflex capacitor

These are the standard MKT/MKS Types you get when ordering at Reichelt. The pinspacing for the Trevor board seems to be 7,5.

Hope that helps

But why do you need the NJU7304D?

chriss

3

I didn´t do a search on these one, but the UB is just a special variation of the B type. It seems not so common though

I’m not betting on this, but I think that unbuffered types are the original, first generation CMOS logic. What makes it so attractive to SynthDIY community, is that those are analog devices, that are not being restricted to pure 1/0, high or low operation (buffering probably means something like Schmitt trigger before actual logic circuit forcing it to operate in logic voltages).

Bye, Moebius