Using Blender Pots For Tone??

[zozoe]

Greetings,, having moved over to a 4-way for my
B-BM-BN-N sounds, none of my CTS EP4185's Blender pots I'm ditching will work as simple tone pots?? I mean, I put them to the meter & they're not reading what they should be...??
thnx

 

[beaubrummels]

A CTS EP4185 is a 250k audio-taper no-load tone pot. If you wire it correctly as a tone control, it should work fine. From your description, it's not clear exactly how you are testing the pot and why it's not reading what you think it should read.

 

[zozoe]

BEAU'B,,, how should I be testing it? I thought the middle lug to either outer lug...

 

[beaubrummels]

Well, since it's no-load, you'd have to turn it to "9" and put a probe between the middle lug and the output/ground lug to read the resistor track. The other way would be to turn it to 0 and measure from the middle lug to the input lug.

 

[zozoe]

okay,,, on the high end they're reading 19 meg, which perhaps is so high, it's as good as open...? I have other non blenders, that read the expected zero to approx. 250k, but I just put the blenders in & that work just fine.... Maybe that upper end reading is so hi it's the same, or close to out of the circuit.....? Sounds fine though...
thnx

 

[beaubrummels]

If you're getting 19 Mohm on a 250k pot, either your meter is set wrong, or you aren't testing it out of circuit, or something else is not right. I actually can't imagine how to get 19 Mohm testing a 250k pot.