Small footprint pots? Little blue plastic square backs?

[ericcoleridge]

I need to find some very small backed pots and I've seen these particular ones on Thomas Whites "Natural Rhythm" site and elsewhere. Pictured here:

Just wondering what kind/where to find them; Also, if they're smaller than the little Alpha pots Futurlec sells (what I already have)?

[urbanscallywag]

Aren't they Bourns 90 series?

http://www.bourns.com/pdfs/90SERS.pdf

[djthomaswhite]

Yeah, those are the Bourns 91A series. Very loose feeling compared to Spectrol/Vishay, but they don'e get any looser with use like Vishay/Spectrol. Now they are actually cheaper than the Spectrol 248/148 series. Allied Elec has them I think. I have found them on eBay before too.

Thomas

[/mr]

Bourns series 90 (used in MOTM) is not very small (16*18mm)
compared to for example Bourns series 50 (13*13mm).
I'm planning to use the wonderfully dampened metal-shafted 50 instead of the way too loose plastic 90.
Here is a picture of a 51 and a 91, both with MOTM-sized knobs (PKES90):

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[BananaPlug]

FYI, last time I tried to actually buy some of those small Bourns pots nobody had stock or would sell in small quantities. If you find a good source please let us know.

[ericcoleridge]

Yes, this smaller Bournes 50 is exactly what I need-- thank you very much for pointing it out. Very nice.

I figured these-- pictured Bournes pots above-- were a common species. I've seen them in many peoples' projects-- but I've just never looked further than the $0.50 small Alphas offered by Futurlec. But now I need something even smaller.

I wonder, if the Bournes 50 is indeed unavailable, if there is a Spectral pot, for instance, with similar specs, size, etc.

[ericcoleridge]

Incidentally, here's a link to the Bournes product page, with all their panel control pots (you may have to cut and paste it):

http://www.bourns.com/components.aspx?cmsphid=7631383|7163299|4003686#cpc

However, I'm having a little trouble finding either the 51/53 or 90 series at Mouser or Allied.

[/mr]