Same seller has an Interesting lot of Test gear with some up for delivery too https://www.ebay.com/sch/Business-Industrial/12576/m.html?item=402956962238&ViewItem=&_ssn=capitolcityloans
Did a double-take on this item....
Vintage 8uF MFD 600V Oil Filled Capacitor - Speaker Crossover? eBay auction: #384249153806
I'd like to see those speakers....
Might look something like this...
http://jazzman-esl-page.blogspot.com/ Guidelines for Symmetrically Segmented Wire Panels (hybrid ESL):
· Diaphragm-to-stator gap (d/s): 0.063” (+.015/-.000)
· Span between diaphragm supports: 70-100 x d/s
· Wires: 18-22 AWG single-strand copper, PVC or XLPVC insulation only
· Max span between wire supports (wire gauge/inches): 22/2, 20/3, 18/4
· Wire O.D. (insulation included) should not exceed d/s
· Gap between wires (insulation-to-insulation) should not exceed d/s
· Ideal (max output) open area: 42% (gap/OD)
· [Down to 12mm] more/narrower wire groups = wider/smoother dispersion
· Transformer(s) power/ratio (each speaker): 100-160VA / 50-100:1
· Bias voltage: 1.8kV – 4kV
· X- over frequency/filter slope: >200Hz / 24db