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RF TRANSFORMERS / SIGNAL TRANSFORMERS, New, old stock (NOS). I bought a ton of these - and am selling my extra stock. These isolation RF / signal / pulse transformers have 2 sets of windings with the same inductance (2.5 mH) and resistance (2.5 ohm) on each side. The coil is a spool-wound coil with a ferrite shroud, 1/2" diameter. 3 pins on each side (middle pin is center-tapped), with pin-to-pin spacing of 3/20" (which means that the end pins are 0.3" apart), and spacing between pin rows of 9/16". Because the inductances and resistances are equal on both sides, these make great 1:1 isolation transformers. And because these transformers are center-tapped, you can do 1:2 step-up and 2:1 step-down transformer applications with them. I found that removal of the ferrite shroud is best done by using a small grinding wheel to carefully grind off the ferrite bridge at the top of the coil (across the label), at which point the shroud comes to pieces and is easily removed. When the ferrite is removed, the about 1/4"-thick spool has a 3/16" through center hole, where you can boost some of the inductance lost due to the removal of the shroud by inserting a piece of ferrite slug or soft iron rod (e.g. an iron nail head). NOTE: Later availability not guaranteed. LIMITED QUANTITY. Seller listing codes: LD097, LR000-S00, LS000-R00, MM000, CC000. (all content is the responsibility of the poster) |
soniatran@oklahomaselltoday.com (Sonia Tran) for more information. All emails will be forwarded to the poster's actual email address.