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 Forum index » DIY Hardware and Software » Thomas Henry designs
TH VCO-1 parts list in the making
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Hedefar



Joined: Feb 07, 2013
Posts: 15
Location: Denmark

PostPosted: Sun Feb 17, 2013 12:19 pm    Post subject: TH VCO-1 parts list in the making
Subject description: I'm making a list and checking it twice!
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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.
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elmegil



Joined: Mar 20, 2012
Posts: 1473
Location: Chicago
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PostPosted: Sun Feb 17, 2013 8:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

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...
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Hedefar



Joined: Feb 07, 2013
Posts: 15
Location: Denmark

PostPosted: Mon Feb 18, 2013 3:52 am    Post subject: Reply with quote  Mark this post and the followings unread

elmegil wrote:
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...


Great, thanks for helping me out again, elmegil Smile

Any comments on what kinds of capacitors should be used?
Only C3 was specified and should be of polystyrene type.
I am guessing that the rest should be obvious... but I am a newbie, so to me, it isn't. There are so many kinds to choose from!

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.
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Hedefar



Joined: Feb 07, 2013
Posts: 15
Location: Denmark

PostPosted: Mon Feb 18, 2013 4:55 am    Post subject: Reply with quote  Mark this post and the followings unread

Hedefar wrote:
elmegil wrote:
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...


Great, thanks for helping me out again, elmegil Smile

Any comments on what kinds of capacitors should be used?
Only C3 was specified and should be of polystyrene type.
I am guessing that the rest should be obvious... but I am a newbie, so to me, it isn't. There are so many kinds to choose from!

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 Smile
http://www.mutable-instruments.net/forum/discussion/comment/47468#Comment_47468
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elmegil



Joined: Mar 20, 2012
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PostPosted: Mon Feb 18, 2013 5:58 am    Post subject: Reply with quote  Mark this post and the followings unread

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 Smile.
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james.watkins@gmail.com



Joined: Aug 30, 2013
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Location: Seattle, WA

PostPosted: Fri Aug 30, 2013 2:53 pm    Post subject: jameco part numbers for VCO-1 Reply with quote  Mark this post and the followings unread

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
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Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
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PostPosted: Sat Sep 07, 2013 1:10 pm    Post subject: TH VCO-1 parts list in the making Reply with quote  Mark this post and the followings unread

==================
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 Smile
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
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siri



Joined: Apr 04, 2014
Posts: 2
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PostPosted: Mon Apr 21, 2014 9:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

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

Code:
VCO-1 PARTS

RESISTORS
-----------
R1= 47R
R3= 390R
R4= 820R
R5,R6= 1K
R7= 1K8
R9-R11= 2K2 (qty=3)
R12= 3K
R13= 5K1
R14-R17= 10K (qty=4)
R18,R19= 12K
R20,R21= 18K
R22= 20K
R23= 22K
R24= 27K
R26-R31= 100K (qty=6)
R40= 150K
R41= 330K
R42= 1M
R43= 1M5
R44,R45= 2M2
R46= 3M3

TRIMMERS
--------
R2= 100R
R25= 50K
R32,R33= 100K

POTENTIOMETERS
--------------
R34-R39= 100K LIN(qty=6)

CAPACITORS
----------
C1= 47pf any kind
C2,C3= 0.001uf polystyrene cap (or low-tolerance cap)
C4>C11= 0.01uf (qty=8) ceramic or tantalum
C12= 0.22uf any kind
C13,C14= 10uf electrolytic

ICS
---
IC1= CA3080
IC2-IC4= TL072 (qty=3)


OTHERS
------
R8= 2K TEMPCO 3300ppm (or 3500)
D1= 1N914
Q1-Q4= 2N3904 (qty=4)
Q5-Q6= 2N3906
IC SOCKETS
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acidblue



Joined: Jun 26, 2009
Posts: 192
Location: The Darkside

PostPosted: Tue May 13, 2014 4:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

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