Pots and more..

roadkingbluzs · Post by **roadkingbluzs** » Sun Jan 27, 2008 9:13 pm

I was starting to place order with tubes and more and found that the pots listed are not the same value or part number. can anyone clear up values with the designation ##KA & ##KB. Is the KB a basic K (linear) or? Bob

paulster · Post by **paulster** » Sun Jan 27, 2008 11:22 pm

A is audio (logarithmic), B is linear.

roadkingbluzs · Post by **roadkingbluzs** » Mon Jan 28, 2008 12:09 am

Just making sure as the catalog does not list a "B" . Thanks for the note. Now to place order! Bob

gearhead · Post by **gearhead** » Mon Jan 28, 2008 3:14 pm

A is not always "audio". For milspec pots (RVXXXXA), A and B are Linear, and C iand D are Log(audio).

However, from the same manufacturer (ex PEC), for the commercial part number the A -is- audio, and U is linear.

Go figure.

statorvane · Post by **statorvane** » Mon Jan 28, 2008 5:32 pm

A is not always "audio". For milspec pots (RVXXXXA), A and B are Linear, and C iand D are Log(audio).

Okay, I know this will sound ridiculous. I replaced a tone pot in my son's guitar with one of the Mighty Mite dime sized pots - 500k (trying to shoe-horn a Sustainer in there you see). Anyway, the pot has "D500" stamped on the back. I assume the "D" doesn't necesarily mean "dime" (Asian hardware I'm sure), nor would I presume that Mighty Mite hardware is built to MIL standards.

Just curious if anyone knows what the"D" means here. I had assumed it would be audio (GC parts area - salesman didn't know); tone is controllable.

Thanks.

novosibir · Post by **novosibir** » Mon Jan 28, 2008 6:18 pm

With some exceptions as already mentioned above almost always

A = audio/logarithmic

B = linear

C = reversed audio

D = special taper after customer's request

Larry (neither linear, nor logarithmic)

gearhead · Post by **gearhead** » Mon Jan 28, 2008 7:24 pm

I would always suggest going to the manufacturers website and looking it up to just to make sure.

http://www.mightymite.com/e_parts/index.html

They do list the D500k as being an audio pot.

statorvane · Post by **statorvane** » Mon Jan 28, 2008 10:12 pm

I would always suggest going to the manufacturers website and looking it up to just to make sure.

Well hey, thanks for the link. Now I can sleep at night!

David Root · Post by **David Root** » Tue Jan 29, 2008 1:41 am

Maybe not! On some schematics, both relating to audio taper pots, -A means old log taper (70/30), -B means new (90/10).

I know, I know, you didn't want to hear that! Me neither.

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