Hi Barrie, B&W used to make a model 3853 which was 72 uH. Close enough? There is also a surplus piece, which I've seen a few exemplars go by over the years. It has large, circa 8" x 10" ceramic end plates with an approx. 4" diameter by 10" long coil mounted toward one corner of the plates. I vaguely recall figuring it at over 100uH long, long ago. You might troll for one on... Ebay. Neither of these are wound with particularly large wire... perhaps #16? 73 & Good morning, Marv WC6W -- "Barrie Smith" wrote: Hello All: For an antenna project, I have need for a 100 microhenry adjustable inductor. I can wind one, and provide taps throughout. However, I'm wondering if there is such a thing as a 100 microhenry rotary inductor. And, if there is, where would I find one? 73, Barrie, W7ALW _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps ___________________________________________________________________ Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 250MB of Email Storage. Visit http://www.juno.com/value to sign up today!