Re: Ultra miniature pots anywhere in the UK?U

Ron(UK) <ron@xxxxxxxxxxxxxxxxxxx> wrote in message
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N Cook wrote:
Ron(UK) <ron@xxxxxxxxxxxxxxxxxxx> wrote in message
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N Cook wrote:
Or a good keyword for searh engines
Well they seem smaller than the sub miniature classification, plain
linear
or logs, not funny balance pots or vol pots with low vol compensation
take-offs etc
Body of order 10 to 12mm diameter or edges but length to end of
spindle
35mm. I'm getting a bit tired of trying to find
space for sub-miniature size and packing out for the spindle to poke
through
the chassis. The wipers on these seem so flimsy that the lubricant
inside
going claggy seems to be enough to lift the tiny wiper wishbones to
break
contact. The tracks are never worn. I'm reluctant to clear out the
grease
and replace as they just seem mechanically so flimsy anyway, the wiper
contacts must be no more than order of 0.5mm.

Rapid Electronics -
http://www.rapidonline.com/

Ron


--
Lune Valley Audio
Public Address Systems
Hire Sales Maintenance
www.lunevalleyaudio.com

Ta, best source so far the Vishay Spectrol ones on Rapid. Strangely the
Vishay site datasheets for those 148/149 types don't have the spindle
lengths but scaling from the 12mm they are about 25mm and also 1/4 inch
diameter. That has solved the pcb footprint aspect.
It looks as though I'll have to get a range of them , cut back their
shafts
a bit and add cut off long shafts from other pots or 5mm or 1/4 inch
diameter rod plus ferules for extenders up to 35 or 40 mm, at least that
way
I won't have the knob mismatch problem of cicular/splined/small D/large
D/5mm and 1/4 inch. Just too many variables unless your a manufacturer
ordering 1000 or more specials


Can you still get those brass shaft extenders (ooer missis!) RS and
Farnells used to sell them? I must admit that I`ve extended one or two
using shaft sawn off old pots and glue lined heatshrink sleeving.

Ron


--
Lune Valley Audio
Public Address Systems
Hire Sales Maintenance
www.lunevalleyaudio.com

I tend to see only plastic shaft opnes and tend to use ballpoint pen tops ,
cut down, to bridge the join 1/4 to 1/4 or 5mm because of taper and liberal
melting/welding of plastic and hot-melt string. Metal ones i've
turned/drilled down brass rod stubs and tapped radial threads for grub
screws

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/


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