I was browsing around in the back of Anchor Electronics a couple of days ago and came across some clean (but dusty) vintage HP test gear - and several very cool large variable resistors. I've attached some pictures of both. BTW: Those of us in Silicon Valley are fans of Anchor - because they carry lots of IC's, parts, connectors, etc. Their catalog can be downloaded here: https://anchor-electronics.com/ If you're interested in the HP test gear or large variable resistors contact Alicia - for parts, contact any staff member. Note: I receive NO financial benefit from this email and my only relationship with Anchor is as a long time customer. Phone: (408)727-3693 Best, Lyle -- 73 NM6Y Bickley Consulting West Inc. https://bickleywest.com "Black holes are where God is dividing by zero"