Potmeter "a" logo identification

[TTL]

I'm trying to identify some 100K logarithmic potmeters I bought years ago, and ideally want the exact same kind.
But I can't identify the brand which is an "a" inside a circle. Can anyone recognize it and shed some more info on the matter?
I believe I purchased them from an electronics firm in the UK (Maplin, Bonex or Rapid perhaps) during the late 80s or early 90s I think.

 

[kellys_eye]

The 'A' designation usually indicates the 'law' of the potentiometer - in this case A usually means 'linear' (B usually Log).

Whilst this is common practise it's by no means standard practise though and depends on where in the world you are. See below:

 

[TTL]

Sorry, I wasn't quite clear about my request. The "a" I'm referring to isn't the "A100K" designation but the logo above it which I hope would reveal the manufacturer.

PS. these are indeed logarithic potmeters (they were purchased from the UK). Thanks for the chart -a handy reference!

 

[kellys_eye]

Sorry, I wasn't quite clear about my request.

Yes you were! Silly me didn't pay proper attention - d'oh....

 

[TTL]

No problem

 

[Arouse1973]

The company is Alpha.
Thanks
Adam

 

[TTL]

Thanks, Arouse1973!
Is this website of the Alpha you're referring to? The logo looks different, but they could have changed it since back then.
Also I couldn't find the specific pot I already have, but again I suppose they could have changed their design. Does anyone recognize this exact pot and know where I can order one from (so it matches the "feel" and design of the other ones on my PCB)?

 

[kellys_eye]

Body size and pcb fittings is relatively easy: check out this one I found on eBay although you might have to cut/file the shaft to length.

http://www.ebay.co.uk/itm/Long-Shaf...hash=item1c28b130d0:m:mP6cn5gMdgGY1iuA5947KDw

but as to 'feel' - of this is important to you then it might mean changing all the pots to the same manufacturer.

Check out ALPS and BOURNS for suitable replacements.

 

[Arouse1973]

Thanks, Arouse1973!
Is this website of the Alpha you're referring to? The logo looks different, but they could have changed it since back then.
Also I couldn't find the specific pot I already have, but again I suppose they could have changed their design. Does anyone recognize this exact pot and know where I can order one from (so it matches the "feel" and design of the other ones on my PCB)?
View attachment 35331

Yes that's the same company.
Adam

 

[TTL]

Thanks guys!
I'll keep on looking for the exact pot pictured in the postings above, but will keep the other options suggested in mind if I don't succeed.