Greetings all,

I'm repairing a friend's super-duper mega blender (brand name shall
remain unmentioned to protect the guilty) whose variable speed pot has
gotten flaky. It's a very thin design (the pot that is) but I think I
can fit in a replacement. The ID markings aren't readable, and searches
don't turn up anything that looks similar. One lug is cut off, making it
just a variable pin and common. I measure 5k between the cut off lug and
common, but the wiper has gotten so bad that it's really jumpy if
touched or moved. That's the problem as it's used...

Anyway, I can't get enough info to tell which type I should replace
with. It seems to not be quite linear, but it jumps around so much and
never does the same thing twice, so who knows. The question is, are
there any designs that use or used an audio taper pot for triac (or
maybe scr) speed control? The board is upside down and a little tricky
to get at, so if one or the other is _always_ used, I'll just go with
that. Anyone with countertop AC appliance motor control experience??

My concern is that they get the same relative speed progression up the
dial, rather than the replacement making it very little change at first,
then all of the variability crammed into the last bit of rotation of the
dial or such.

I also don't want to order something, tear it down, replace it, put it
together, and find it's "not right". ;)

Thanks.
Skip


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