Big Kidz - do you still have access to a service manual for the 5000a? I need one, but, for now, maybe you could identify the part number of the gain control for this unit? One of mine came apart.
Noble 50k SVNOB stereo. A DACT CT2-50-2 Stereo attenuator should fit as it was part of Mike Elliot's upgrades and I have seen a pic of it installed. You could also try TDK.
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