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Component questions
MUFF WIGGLER Forum Index -> Oakley Sound Systems  
Author Component questions
oldenjon
Found using Oakley Parts Guide
Blinkar blå
OP275: http://parts.digikey.com/1/parts/463864-ic-amp-audio-ster-class-ab-8di p-op275gpz.html

But I didn't see one in the VRG parts list? hmmm.....
oldenjon
Thanks for the tip on the Op275 and sorry for the confusion. I'm shopping for multiple Oakley builds.

The AD712 is for the VRG.

And these are for the SVCO-B:
74HC14 hex schmitt trigger U3
74HC138 decoder U1
74HC192 up/down counter
Paradigm X
Tonys very useful indeed parts guide :

http://www.oakleysound.com/parts.pdf
oldenjon
Thanks that helped quite a bit. Still some questions though as not every part is included in the guide.

The top-adjusting 25-turn cermet trimmers needed for the VCO, Croglin, and VRG are a little pricy on Newark. I see some 12-turn cermet trimmers at a good price, is this an acceptable substitution? If not, it could make sense to make a small order with Rapid for these parts that are 28 turn.

There are 2 - 1K 6mm cermet trimmers required for the VCO. The VCA, and ADSR also call for 6mm trimmers, are they the cermet type as well?

Also, this part required for The SVCO-B is very mysterious to me: "2SK30A-GR
Japanese JFET"
oldenjon
Wow, the shipping cost for a small order from Rapid is exorbitantly high, so guess I won't be going that route.
Blinkar blå
Maybe try Tayda or Musikding for multiturn trimmers:

http://www.taydaelectronics.com/potentiometer-variable-resistors/cerme t-potentiometers/3296w.html

http://www.musikding.de/index.php/cat/c144_Precision-Trimpot.html

If it doesn't have to be exactly the (GR) version of 2SK30A Tayda & Musikding have them:

http://www.musikding.de/product_info.php/info/p1697_2SK30A.html
(doesn't say which version)

http://www.taydaelectronics.com/2sk30-2sk30atm-y-n-channel-50v-6-5ma.h tml

(I've seen the (GR) version @ Small Bear)
Barcode
oldenjon wrote:
Wow, the shipping cost for a small order from Rapid is exorbitantly high, so guess I won't be going that route.


Many of the parts from Rapid are available from Mouser. Just search the part from Tony's list, grab the manufacturers part number, and search on Mousers site. If the part doesn't show up just search for the specs and find a suitable replacement.
Blinkar blå
2SK30A-GR:
http://www.smallbearelec.com/servlet/Detail?no=315
Synthbuilder
Also of use is GTXDude's parts manifests. This single zipped file contains spreadsheets with Mouser and other US suppliers' part codes for 25 individual Oakley projects.

Tony
oldenjon
Synthbuilder wrote:
Also of use is GTXDude's parts manifests. This single zipped file contains spreadsheets with Mouser and other US suppliers' part codes for 25 individual Oakley projects.

Tony
Neat! That is incredibly helpful.
Ok one question though, the VCO calls for a 1nF 1% polystyrene capacitor.
The radial cap that is linked to in the parts guide has a pitch spacing of 7.62mm, and I'm required to buy a min of 5 at $1.94 each. GTXDude's list has links to a 5% axial polystyrene cap. Which one should I go with?
gtxdude
oldenjon, i can say with personal experience that the 1nf cap specified in my list works fine. I built 3 VCOs using that cap. They calibrate fine and track well (after I figured out how to calibrate them properly).

good luck with your project!
oldenjon
Thanks GTX dude.
Ok, so my order is 99% complete, I just need to tie up a few loose ends.

The on-off spdt switch required for the VRG is changed to a On-On spdt switch in your list. The On-off is a bit more expensive. Is there a way to wire the on-on to function as an on-off type?

Can someone point me towards suitable 3mm green and orange/amber leds for the SVCO build?

And finally, I could use some pointers for the wire requirements. I've already got 22awg hookup wire, but i still need these:

55mm (2 in) jumper lead 8-way
Thin solid core wire
10-way IDC 0.05" cable

Mousers/Small Bear Links and lengths required for the last 2 would be great.
gtxdude
3mm green led = 859-LTL-4231

3mm yellow led = 859-LTL-4251

3mm amber led = 859-LTL-4291

(all of the above are Mouser numbers)

The following are available at allelectronics.com

2 inch ribbon jumper = RJ-211 (11 pins, cut them down as needed)

25 ft solid core wire = 22RD-25S

10 ft of 14 cond ribbon cable 0.05" pitch = RCBL-14 (cut down for 10 cond)

10 pin IDC conn (2 X 5) = RCSC-10

If you have never made IDC cables from scratch you may find parts of this helpful:

http://www.midibox.org/users/jim_henry/building_a_midibox_lcd_cable.pd f

About the VRG switches... Look closely at the spread sheet. There are two switches listed. An on-off-on (line 53) and a on-on (line 54). Those are long part numbers and only differ by one digit.
oldenjon
gtxdude wrote:

About the VRG switches... Look closely at the spread sheet. There are two switches listed. An on-off-on (line 53) and a on-on (line 54). Those are long part numbers and only differ by one digit.

The parts list calls for an on-off-on switch and an on-off switch, both spdt types
Synthbuilder
oldenjon wrote:
The parts list calls for an on-off-on switch and an on-off switch, both spdt types

The on-off (SPST) switch is a subset of the on-on (SPDT) switch. A true on-off switch only has two solder tags. It simply makes or breaks a circuit. An on-on switch has three terminals and the wiper of the switch (the middle solder tag) makes contact with either of the remaining tags.

So an on-on switch will function as an on-off switch just by not connecting the third tag. It is quite often the only way you can sometimes buy simple SPST switches. Most of my build photos will show on-on switches even though they are quite often wired only as on-off switches.

Tony
oldenjon
Synthbuilder wrote:
oldenjon wrote:
The parts list calls for an on-off-on switch and an on-off switch, both spdt types

The on-off (SPST) switch is a subset of the on-on (SPDT) switch. A true on-off switch only has two solder tags. It simply makes or breaks a circuit. An on-on switch has three terminals and the wiper of the switch (the middle solder tag) makes contact with either of the remaining tags.

So an on-on switch will function as an on-off switch just by not connecting the third tag. It is quite often the only way you can sometimes buy simple SPST switches. Most of my build photos will show on-on switches even though they are quite often wired only as on-off switches.

Tony

Thanks, I suspected as much but just wanted to clarify.

Does anyone know if there is a Neutrik (Rean) equivalent of the Switchcraft 112apcx?
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