Four terminal pots? What the...

clubsprint · Post by **clubsprint** » 25 Nov 2010, 13:03

Saw this schem of a Boss PQ-4 and the 100k bass,middle, treble and presence pots seem to have 4 legs from the schen, Would someone pls explaaaain this to me?

lolbou · Post by **lolbou** » 25 Nov 2010, 13:52

Casing of the pot?

Hides-His-Eyes · Post by **Hides-His-Eyes** » 25 Nov 2010, 15:07

They do appear to have a fixed tap on them.... Very strange.

Duckman · Post by **Duckman** » 25 Nov 2010, 18:06

lolbou wrote:Casing of the pot?

Kinda case ground?

Solidhex · Post by **Solidhex** » 25 Nov 2010, 20:09

Yeah

The only pots I've seen with 4 terminals have one attached to the casing for grounding.

electrosonic · Post by **electrosonic** » 27 Nov 2010, 16:33

Some of the tone stacks in old brown Fender from the early 60's used tapped pots. Not exactly sure why this was necessary though.

Andrew.