WTB NAD 3155 volume potentiometer

[rosienej]

After a recap of my NAD 3155 I dropped and fractured the volume control. I repaired it with a Panasonic volume control which has loudness taps and two shafts for balance, but I would like to get the correct pot in it.

 

[rayma]

You'll have to post a good photo of the original.
Anything like this?
https://reverb.com/item/58692223-made-in-japan-alps-50k-16mm-stereo-volume-control-potentiometer

 

[rosienej]

Image Below:
Rear section (according to schematic and from the part) 50KMN balance connected to inner shaft.
Front section (according to schematic and from the part) 20KBX2, I believe this one is an audio/log taper since the center tap is 5.87K from the low side of the control.

Thanks for the help!!

 

[rosienej]

For others who might have a similar issue. My current approximate solution is to reorder that stages of the attached part. It is available from aliexpress for a moderate price. Incorrect resistance, taper and the pin spacing is slightly off.

 

[rayma]

That's gonna be a custom part that you can only order in high quantities, direct form the mfr.

 

[rosienej]

Thanks. I feared as much. I found the stages so I will build one up using the Panasonic's mechanicals.
I will post the steps in the Forums.

 

[Egamaster]

Hi, did you manage to build up a new pot and did it finally work well ? I am looking at getting a NAD 3100 that has a faulty pot so may have to look at doing something similar. Thanks for any inputs...

 

[Pars]

That pot seems to have been used on some other NAD products as well (7140), etc. You might try emailing NAD at Parts-USA@Lenbrook.com. The NAD part number is 41-686-0-0. I've attached the service manual as well.