Analog abstracts Z plane rotation?

[AnAnonymousParty]

This is what I use:



2208s are not impossible to find, you have to null all the offsets to zero with all the trim pots after grounding all the inputs and then it just works.

[glorocks]

Thanks- That looks like it will do it! I use 2208's in the multiplier section of my abstract generator- I like the way fooling with the offsets skews the image. On my console I have the offsets tied to joysticks on the front panel. You gotta buffer them though, because the op amp in the 2208 is fragile. Very fragile- I lost a few before I buffered them.
I have been able to get 2208's from Chinese suppliers thru Ali Baba for about $1.50 ea in 50 quantities. You can also get 8038's for about the same price. The 2208's you find on Ebay come from China mostly.
I'm still fooling around with the AD-633, though, just to prove to myself Gary's circuit is viable. The unused inputs need to be grounded, and you have to have a 10X gain stage on the output.
I really appreciate your input- when time permits, I will post my complete rotation stage with x, y and z stages (tested, of course).
Thanks

[glorocks]

Now I'm wondering what would happen if you played with the offsets on your circuit! So many circuits, so little time.................