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Article #6526Re: Impedance match 50 to 75 ohms
From: robert.f.casey
Date: Sat, 12 Sep 1992 01:56
Date: Sat, 12 Sep 1992 01:56
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Many years ago I built a device to do this. But I don't remember clearly what exactly I did, but it was something like this: wrap 5 turns of wire around a toroid core. tap at 4 turns. the tap is 50 ohms, top of coil is 75. Bandwidth was something like 20 to 300 Mhz, maybe even higher. Loss was about 1/2 to 1 db (had access to a network analyzer back then). Believe there is something on this in the ARRL handbook.
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<1992Sep12.015631.10174@cbfsb.cb.att.com>Path:
arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsc!cbfsb!cbnewsb.cb.att.com!wa2iseReferences:
<1992Sep10.175850.24383@lonex.rl.af.mil> <1992Sep11.101819.58812@cc.usu.edu>Show Full Headers
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsc!cbfsb!cbnewsb.cb.att.com!wa2ise From: wa2ise@cbnewsb.cb.att.com (robert.f.casey) Subject: Re: Impedance match 50 to 75 ohms Message-ID: <1992Sep12.015631.10174@cbfsb.cb.att.com> Sender: news@cbfsb.cb.att.com Organization: AT&T References: <1992Sep10.175850.24383@lonex.rl.af.mil> <1992Sep11.101819.58812@cc.usu.edu> Distribution: na Date: Sat, 12 Sep 1992 01:56:31 GMT Lines: 6