TH VCO-1 parts list in the making

[Hedefar]

Hey guys,

I'm planning on building the Thomas Henry VCO-1.
But because I am still a DIY newbie, I felt that I was missing a summary of all the parts that would be used, in order to help me better understand the proportions and expenses of the project. Therefore, I have made a spreadsheet containing all the needed parts.

The spreadsheet can be found here and was based on the schematics that can be found here.

But because I am inexperienced, I would like it if someone could look through the list while looking at the schematics, and comment on what kind of capacitors I should choose in the different places. Apart from the caps, I think everything else is in place but I am open to (and hoping for) suggestions for improvement.

Please let me know what you think of this list.
If you think that it is useful, I will send it to Scott Stites so he can add it to the website, if he wants to.

[elmegil]

I checked list to schematic, marking off the list and it looks good from that direction. I didn't go back and do it the other way, marking off on the schematic...

[Hedefar]

[Hedefar]

[elmegil]

In general I haven't yet found any practical difference between using polystyrene, mylar film, or C0G/NP0 ceramics. Part of the point is that you need to use a high quality cap that is temperature stable.

Of course, keep in mind I've been doing this just about a year now, so you should pay more attention to things more experienced folks have to say .

[james.watkins@gmail.com]

Well, i couldn't seem to download the list, but here's one i put together with part numbers from Jameco (this doesnt include the thermistor or the polystyrene cap, since they don't have those?) I'm new to all this, but want to contribute somehow, so if i missed something please feel free to correct me...

661183 47 Ω - Qty: 1
240725 100 Ω Trim - Qty: 1
2160972 390 Ω - Qty: 1
661482 820 Ω - Qty: 1
661503 1 K - Qty: 2
661562 1.8 K - Qty: 1
661589 2.2 K - Qty: 3
661618 3 K - Qty: 1
691032 5.1 K - Qty: 1
661757 10 K - Qty: 4
661773 12 K - Qty: 2
661811 18 K - Qty: 2
661829 20 K - Qty: 1
661837 22 K - Qty: 1
661853 27 K - Qty: 1
853791 50 K Trim - Qty: 1
661992 100 K - Qty: 6
240470 100 K Trim - Qty: 2
255557 100 K Pot - Qty: 6
662039 150 K - Qty: 1
662119 330 K - Qty: 1
662231 1 M - Qty: 1
691622 1.5 M - Qty: 1
662311 2.2 M - Qty: 2
691690 3.3 M - Qty: 1
332567 47 pF - Qty: 1
15190 0.001 µF - Qty: 9
25540 0.22 µF - Qty: 1
94212 10 µF - Qty: 2
12116 3080 Operational Transconductance Amplifier - Qty: 1
213073 72 Op Amp - Qty: 3
112206 4x 8-Pin DIP IC Sockets - Qty: 4
178597 2N3904 - Qty: 4
178618 2N3906 - Qty: 2
281738 1/4" TS Jack - Qty: 7


also a version is here: https://docs.google.com/spreadsheet/pub?key=0AsnRxVvcUub-dHFnazBobE9menhCZU5RSDVsMTNUTUE&output=html

[Tim Servo]

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And, by the way, is "polystyrene" the same as "styrene"? Polystyrene is nowhere to be found and I can only find the latter at Mouser.

I got the question answered at here, if anyone is interested
http://www.mutable-instruments.net/forum/discussion/comment/47468#Comment_47468
===================
Actually, no, the answers there were not correct. The tolerance of the cap isn't really the issue here. The value can be slightly off in a VCO, and it is very easy to compensate by just tweaking the Coarse or Fine tune pots. What you really want in a timing cap is something that is temperature stable. As mentioned before, mylar film, styrene, or ceramic C0G caps are good candidates. If you get a styrene / polystyrene cap, just be careful with your soldering as they can be damaged with too much heat.

One more note: when I build a VCF, then I want the tuning caps to match as closely as possible. In that case, I usually just buy ten or even twenty film or polystyrene caps and measure them to get the four closest together.

Tim (timing is everything, especially if you're a capacitor) Servo

[siri]

The list i made, if any errors i can edit (i checked twice)

[acidblue]

The links to the spread sheet are dead.
Any chance of getting new links??