dotcom pots?

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diophantine
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dotcom pots?

Post by diophantine »

Ok kids, I feel rather embarrassed and silly!

I was going to order some 100K (linear) pots for dotcom purposes this past weekend. On Small Bear they're this (I am pretty sure?):
http://www.smallbearelec.com/Detail.bok?no=9
But, they're out of stock!

So I went to Mouser and ordered what I thought were the correct pots.

Got 'em today and they sure ain't correct! They're like mini-me versions of the pots used on man-sized synths!

Tried searching a bit here & on the .com mailing list without success, so... does anyone know what are the correct Mouser part #s for the .com pots?

:help:

Thank ye!

(P.S. I figured I would get a quicker response here than in the general DIY section.)

Oh, and while I'm at it, are these the correct knobs for .com?:
http://www.smallbearelec.com/Detail.bok?no=739
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Bryan B
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Post by Bryan B »

You have the correct knob linked there. I have ordered those from them before.

What is the Mouser part number on the wrong pots?
The 16mm pots look like mini pots to me.
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JohnLRice

Post by JohnLRice »

Are you doing repairs? Or just custom work?

For repairs/replacements of pots on DotCom modules it might be easiest to get them from the source since the cables are already attached:

http://www.synthesizers.com/cabinets.html#parts

794 1" Round Knob (dual dots) Price: $4.00 US.

QP-P16 Pot, 100K, 6" cable and connector Price: $4.00 US.
QP-P26 Pot, 1M, 6" cable and connector Price: $4.00 US.
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diophantine
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Post by diophantine »

Bryan - great about the knobs.

The Mouser # is 31CN501-F
Looks like they are actually 17mm. I need to always look at the PDF catalog pages - guess the HTML product descriptions don't have all the info.
(I've only ordered from Mouser before with BOMs with product numbers, or just simple stuff like resistors.)

John - It is just for some projects I have in mind, no repairs. I contemplated just grabbing some from Roger, but for the price it didn't seem worth it.

At least I think I can use these pots for a different project... gotta dust off some schematics I drew up last year!
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Bryan B
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Post by Bryan B »

My guess would be either #31VA501-F or #31VC501
Those are both 100K linear and appear to be the larger size.

The difference between them is shaft length:
Shaft length*: .335"(31VA series), 1.32"(31VC series)

http://www.mouser.com/catalog/specsheets/TW-700187.pdf
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diophantine
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Post by diophantine »

Thanks Bryan!! - yeah, those look right.

The 1.32" shaft sounds a bit long - I'll have to measure when I get home.
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dslocum
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Post by dslocum »

Besides Mouser, I've been very pleased with Jameco for pots and lots of other stuff. Their catalog is a LOT easier to find things in. I think this is 24mm pot he one you need (100k lin):
http://www.jameco.com/webapp/wcs/stores ... -1?CID=PDF
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dslocum
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Post by dslocum »

OH - BTW Folks...

Small Bear now has _all_ Moog style knobs!!!!!!!!!!!!!!!!

http://www.smallbearelec.com/Categories ... 5&total=61

:yay: :bananaguitar:
Doug Slocum
Synthetic Sound Labs
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"I guess all the Forest Mims Radio Shack books I read finally paid off!"
"I ordered twice as many _______ as I thought I'd need, only to find out that I'm still less than half way to having enough."
"...this whole thing was started by a dream and a mouse." - Walt Disney
"Flatulence sounds aren't just for brass and reed instruments anymore, thanks in large part to Dr Moog." - Ockeghem
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diophantine
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Post by diophantine »

Thanks Doug! They're cheaper there too!

(Are these the pots you use on your modules?)
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dslocum
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Post by dslocum »

diophantine wrote:Thanks Doug! They're cheaper there too!

(Are these the pots you use on your modules?)
Some are, but some are also 16mm PCB mount types that we use to reduce wiring, etc.
Doug Slocum
Synthetic Sound Labs
www.steamsynth.com
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"I guess all the Forest Mims Radio Shack books I read finally paid off!"
"I ordered twice as many _______ as I thought I'd need, only to find out that I'm still less than half way to having enough."
"...this whole thing was started by a dream and a mouse." - Walt Disney
"Flatulence sounds aren't just for brass and reed instruments anymore, thanks in large part to Dr Moog." - Ockeghem
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Thalassa
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Post by Thalassa »

As Bryan B said the pots are the model 31VA (Linear ) and 31VJ ( Audio ) . The length is .335" , I've bough them few times :)

http://es.mouser.com/Alpha-Taiwan/Passi ... x8Z1z0vod6
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Post by cornutt »

diophantine wrote:
The 1.32" shaft sounds a bit long - I'll have to measure when I get home.
It'll probably be all right by the time you account for the panel thickness and the attaching nuts. If it does turn out to be a bit long, you can always cut the shaft with a hacksaw.
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diophantine
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Post by diophantine »

cornutt wrote:It'll probably be all right by the time you account for the panel thickness and the attaching nuts.
The shaft length, at least for that particular one, is just for the length of the shaft beyond the threading (per the datasheet).

Ended up ordering the ones from Jameco!
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