[TowerTalk] 75 ohm hardline/twinlead

[Greg Becker]

Message-ID: <3457B7E5.3696@ifam.com>
Date: Wed, 29 Oct 1997 17:25:41 -0500
From: Greg Becker <na2n@ifam.com>
Reply-To: na2n@ifam.com
Organization: IFAM - Ideas For American Manufacturers
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To: Press W Jones <n8ug@juno.com>
Subject: Re: [TowerTalk] 75 ohm hardline/twinlead
References: <0041200001935478000002L082*@mhs> <19971029.145602.12327.17.N8UG@juno.com>
		<34579DCA.55B8@ifam.com> <19971029.164512.12327.24.N8UG@juno.com>
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Press W Jones wrote:
> 
> Holy cats, Greg - what problems? We work hard at putting together good
> product that stands with or above the best of them, and we back it up all
> the way. If you had a problem, we want to know about it -- please!
> What problems can occur making coaxial baluns?

At KY2J's. Baluns acted REAL screwy - dozen 5-6" turns or so, put a 50
ohm resistive load on the output, sweep the input, & get
frequency-dependant variations at the input ranging from 20 ohms to over
100 ohms. Wound a second balun - same effect. Crimp on connector instead
of solder - same effect. Different jumpers - same effect.  Put the load
directly across the meter - fine. Identical balun with different
manufacturer's RG213 - fine. Ferrite cores on the coax - fine. 

Don't know what was causing the variation, but it was definitely related
directly to the coax Bob got from you. 

-- 
Greg Becker   NA2N   na2n@ifam.com
IFAM - Ideas For American Manufacturers
Rondout #343 - Hendrick Hudson #875 - F&AM


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