All ready there guys!
but only as a hashed up bodge, with paxolin as a front panel! I have built a pair of 553 based passive eq's. 6 positions switchable HF from @10k to 24kHz thatv fit my API rack. Unbelievable! I am saving up for a multi-value inductor for LF Sowter loadsa dosh, but what I want. again, i want to have switchable frequencies. Other option is one frequency as a shelf, and switchable bells using one value of inductor, say cinemag. i have no room for MF on my front panel, but i've added two more frequencies on my original 553 by doubling/halving the capacitance in the mid-range. Sounds great to me. so @5kHz/2k5Hz/1k2Hz, and bells sound similar(unmeasured). I believe Mr Wolff said that this was practical . . .
Sadly no phantom available on my rack, cos its a BBE rack. Bah! I wish I still had access to the BBEQ;s that I used 15 years ago. full of chips, but SO sweet! API 500 sized. Never seen anymore. I would love to clone some of them . . . . .
I'm with them lot above me on the page!
ANdyP