I found some toroid cores (they were labeled "iron powder", but that was hand-written, so...) The markings say "A4088-02EE" and (on the other side) "4G-L 9972" The OD is 2.4", the ID 1.4" and the hgt about 1.2". The epoxy is a light chocolate.
Does anyone recognize anything at all about these? I suspect they might date back to the 1960s. The numbers don't look like Arnold or Magnetics, the only two I'm still familiar with.
OK, the other shoe. I need some inductors. So, I'm winding one of these beasts with some 22 AWG to see what kind of AL I get. I think the last time I handwound a toroid must have been pre-arthritis. I made a little shuttle out of a fork and that's OK, but I'm running close to 30 seconds a turn. If I need a couple hundred turns, I may grow old and die on this! Anybody got a better idea on winding this?
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Help with a toroid
Re: Help with a toroid
