Attenuator from E-bay connections

[stenak]

Hello.

Bought these attenuators from e-bay. I wonder where the signal in/out and ground should be connected?

2P 24 Step Attenuator Volume Control Pot Log A 100K Mono Potentiometer Ladder | eBay

 

[jan.didden]

Maybe the label 'GND' could be a clue?

After that it is 100milliseconds with a multimeter. 😎

Jan

 

[stenak]

You know I am not so smart, and I thought that there are lot of smart persons on this site. That is why I am asking for some advice.

 

[kodabmx]

Have you asked the seller!? They should be able to provide a pinout for their product, no?

 

[merlin el mago]

Mine is near knob RED wire is input signal center is RED wire is output signal. To be sure as others pointed take measurements with a DVM.

 

[stenak]

Have you asked the seller!? They should be able to provide a pinout for their product, no?

Sendt the seller an e-mail, but no answer yet.

 

[merlin el mago]

Attached other pic more clear, all grounds input&output same channel same point. With DVM full anti-clock wise 0 ohms, full clock-wise 100 Kilo ohms. If it's more easy for you, you can connect at the extremes of attenuator.

 

[merlin el mago]

I used the same pic you posted to be more clear, waiting it help you. Input & output ground connected together at the same point. N.B. you need two attenuators due to the fact are mono.

 

[stenak]

Thank you!!
Appreciate the help!

 

[ColinA123]

This is the documentation for the ones I use.

 

[merlin el mago]

This is the documentation for the ones I use.

Yours it's a series type stereo.

 

[pboser]

Hi,
I have a similar situation - I bought a ladder attenuator on ebay 10 years ago and am now trying to use it. I have attached a photo.
It has only 4 wires, but I think I have figured out that ground is at the wire connecting the resisotors at either end.
I have a couple of questions:
1. What am I looking for with my multimeter to make sure I have the correct connections for in and out?
2. In his picture above Merlin el mags shows a separate ground for the input and the output. Is that necessary, or can I ground both input and output (for each channel) at the same spot?
Thanks in advance.
Pete

 

[pboser]

Never mind, I figured it out - turns out I know more than I think I do, whnn I take the time to put it all together. Unfortunately, when I installed it I found it had been damaged (I had stored it carelessly and it got banged around), and rather than try to find and replace the bad resistors, I decided the $10 I paid for it 10 years ago was okay.