fader wiring

[enginefire]

I have a couple of old faders that I am trying to wire up to my console... I tried wiring them in a manner that seemed logical to me, but they do not attenuate the volume completely.

I have attached two photos of the fader diagram and physical wires, maybe someone will have an insight as to what I am doing wrong?

FWIW, the old faders were 10k, and the new faders are around 1k.

[JohnRoberts]

When you say they do not attenuate completely have you considered using 10k faders instead?

If the issue is with fader kill it may be from the fact that there is 10x the current flowing in a 1k fader, while proper differential wiring should still provide decent fader kill.

So your problem may be a combination of two things. lower than design impedance and the fader should have two ground connections. A wire to carry the ground current, and a ground sense wire so when the wiper is all the way down it is read relative to the ground sense read at the fader, and will ignore our voltage build up across the ground wire.

JR

[enginefire]

the 1k faders were free, so i figured i would try them because they are much smoother than the faders i am using now.

would adding a 9k resistor help in any way?

how would i identify the ground sense wire on the fader wiring diagram, or how would I add one? I forgot to mention that there is a push button that engages when the fader is all the way down, which has 3 wires of its own that are not visible in the picture.

I guess this is mostly just an experiment, to see if i can get these faders working or not, or to what level of functionality. If in the end they cannot serve this purpose, I will try and repurpose them in another project.

[Matt Syson]

Hi
Red is fader top (signal in)
Yellow is wiper (signal out)
Black is metalwork (chassis) and usually the green and blue (the pictures disappear when replying on GS) are 'ground', one being the 'bottom' of the fader element, the other being a small seperate pad that the wiper goes to when right at the bottom (hop off).
Being 1K rather than 10K MAY upset the circuitry DRIVING the fader (a TL072 would not be happy) but would not show as 'leakage'.
Any other wires would be other track switching not connected with audio.
Matt S