Roller Inductor, 70uh (E.F. Johnson) - $250 - (Belleville, ON)
Please take note: I will be cleaning these up and replacing the hardware. Just wanted to get these listed before months end!! Variable Inductor. E.F. Johnson type = 229-3-6 These are the real things! Manufactured by E.F. Johnson Model: Unknown Inductance = 70uh Amps = ? Coil = .093" (apx.) Solid Copper, Plated. Spacing = 0.15625 Drum dia. = 4.125 od Turns = 39 Length = apx, 8.500'' Diameter = 3.000" Quantities available...3 Perfect for Radio Amateur use. Antenna Tuner, etc.. Take note that the fixed slider shaft has very LITTLE WEAR, and is of course fully plated..Unlike others I've seen.. Although there may some blemishes. You're buying from an experienced RF Engineer... These coils have been removed from an RCA AM Broadcast transmitter. No indications of heating or abuse. I have a container full of coils on hand to meet various applications. Can also design and fabricated custom ATU's, Phasors, Diplexors, etc. 35 years experience. From AM Broadcast to Shortwave applications..Up to 100Kw. Also on hand RF Current Transformers (Toroid) RF Contactors up to 150 amps Large quantity of Vacuum capacitors, fixed and variable. Also MICA Caps, various values and current levels.
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From ebay.com - 1 month ago