If you can't find either the JLH-822 or 831 you may want to consider these:
The Synthesizers.com Q123 Standards module will do what 1/2 of the JLH-822 does and includes a 440 Hz refrence.
http://synthesizers.com/q123.html Another option is the Yusynth CV Standards module which is sort of a 3-channel JLH-822.
http://yusynth.net/Modular/index_en.html The Yusynth module is DIY and can be made in MOTM format, the Q123 comes assembled and is MU format.
James
To: motm@yahoogroups.com
From: sean_krell@...
Date: Fri, 6 Sep 2013 08:51:13 -0700
Subject: [motm] need to buy a JLH-822 or JLH-831! help!
anyone have one they are willing to sell me? i desperately need this for my live setup.
-sean