Phattline Posted October 2, 2004 Report Share Posted October 2, 2004 I find this and I am horny on it-aahhhI have found all parts - but not thishttp://www.analog-synth.de/synths/tr909/909bd_pcb.pdfI will build this: But before I have a questionWhats that-maby a operation ampliefier-Do you now whats the full name- or a second product072 071 And this sitehttp://www.introspectiv.eclipse.co.uk/I have ordert this pcbs: but I dont find this types in Germany (Reichelt)ZTX1051A2SC2878 (have high reverse current gain)2SD1469 MAX 525 NJU7304DLM723What 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 capacitorPolyester MKT: Is this the same like Foil capacitors or is this styroflex capacitorI now this is much question, but when you see the partlist- its not much ;D Quote Link to comment Share on other sites More sharing options...
chriss Posted October 2, 2004 Report Share Posted October 2, 2004 hi PhattlineWhats that-maby a operation ampliefier- Do you now whats the full name- or a second product 072  071Thats 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 clone2SC2878 (have high reverse current gaini 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.LM723should 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 thoughPolyester: Is this the same like Foil capacitors or is this styroflex capacitori also would like to know this.Polyester MKT: Is this the same like Foil capacitors or is this styroflex capacitorThese 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 helpsBut why do you need the NJU7304D? chriss Quote Link to comment Share on other sites More sharing options...
moebius Posted October 2, 2004 Report Share Posted October 2, 2004 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 thoughI'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 Quote Link to comment Share on other sites More sharing options...
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