KNOB Volume for PV12

Got a problem? See if other members can help you out. Registered users can download schematics, manuals and pictures.
Post Reply
New User
New User
Posts: 1
Joined: Mon Mar 09, 2015 6:18 am

KNOB Volume for PV12

Post by discosoul » Wed Jan 11, 2017 3:43 pm

Hi everybody
I'm a french owner of a preamplifier Conrad Johnson PV12
The volume knob is need to be replacing...(I try since several month ago, to solve the problem with contact spray....but no result)
Actually it's an ALPS 616N 50KDX2 (but it doesn't exist more)...
Anyone knows by what other ALPS Knob volume I must replace it (according the resistance and length of the spindle)
Thanks for your help
Bonjour de France ;-)

Super Advanced
Super Advanced
Posts: 40
Joined: Thu Jun 19, 2014 9:38 am
Location: Australia

Re: KNOB Volume for PV12

Post by plurn » Sat Jan 14, 2017 11:56 am

Sorry - I don't know. I would guess it is 50 kilo-Ohms (50kΩ, or 50,000 Ohms) based on the name. Also would need to be dual channel.

You could try asking Alps what the current equivalent is for a ALPS 616N 50KDX2, or try asking Conrad Johnson what the specifications are for the volume control.

I just had a look at the schematics for the PV12 and it seems to indicate that the volume control is 100k - so I might be wrong about the 50kΩ.

schematics available here viewtopic.php?f=17&t=128

Found this also which says how to clean the volume control. I know you already tried this but you could check that you did it the way that CJ advised - or try again:


Good luck.

Posts: 9
Joined: Tue Feb 14, 2017 5:51 pm

Re: KNOB Volume for PV12

Post by pedalhead » Sat Jun 03, 2017 4:03 pm

Hi guys. My PV12 also has a faulty pot (I think) as it's going from zero to very loud with just a mm or two of knob travel. I'm wondering if you found a suitable replacement? Thanks. Mark.

Post Reply