From oh2aue at kolumbus.fi  Tue Nov  1 02:49:02 2016
From: oh2aue at kolumbus.fi (Michael Fletcher)
Date: Tue, 1 Nov 2016 08:49:02 +0200
Subject: [Microwave] testing waveguide coax transitions
In-Reply-To: <0M6UVZ-1cow1129ql-00yTa8@mrelay.perfora.net>
References: <98B47FC136EA4D1F98055ABE932D7F5C@athlon3200>
	<5817A09C.3000801@netins.net>
	<0M6UVZ-1cow1129ql-00yTa8@mrelay.perfora.net>
Message-ID: <89a57730-adf3-ccc6-c7e1-033c36c6a39a@kolumbus.fi>


FWIW, I regularly use WR75 and occasionally even WR62 at
10368/10450 MHz. Bends, corners (miters) etc. need to be
measured of course. But generally speaking, working so
close to cutoff, the adapters need to be redesigned, for
for both coupling into the respective E/H field and also
for the increase WG impedance.

Motto: any arbitrary waveguide size can be used at least
on one ham band. No such thing as useless waveguide size.

/Michael, OH2AUE

---

Kirjoitettu ajatuksella, tietokonetta ja t?ysikokoista n?pp?imist??
k?ytt?en. L?hetetty harkinnalla, kiinte?n valokuituyhteyden turvin.

From tractorb at ihug.co.nz  Wed Nov 23 15:02:22 2016
From: tractorb at ihug.co.nz (Dave Brown)
Date: Thu, 24 Nov 2016 09:02:22 +1300
Subject: [Microwave] flexible UT-141 equivalent
Message-ID: <96E1506113C74AABADDCA1715BD3A1E7@athlon3200>

Looking for an eight inch (~20cm) length of a flexible equivalent or near 
equivalent to UT-141. Ideally no more loss that UT-141 and preferably less.
 Any suggestions as to where I might get this without selling the house?
73
 Dave, ZL3FJ



From geraldj at netins.net  Wed Nov 23 17:31:07 2016
From: geraldj at netins.net (Dr. Gerald N. Johnson)
Date: Wed, 23 Nov 2016 16:31:07 -0600
Subject: [Microwave] flexible UT-141 equivalent
In-Reply-To: <96E1506113C74AABADDCA1715BD3A1E7@athlon3200>
References: <96E1506113C74AABADDCA1715BD3A1E7@athlon3200>
Message-ID: <583618AB.9080503@netins.net>

Anything flexible and the same diameter will have more loss than the 
best UT-141. A couple years ago at MUD I took a length of LMR-240 with 
crimp on Emerson SMA connectors and at the VNA it measured half the dB 
loss as the best UT-141 at 10 GHz. Its not horribly expensive but it 
does take some care to get all the foil off the cut end of the dielectric.

73, Jerry, K0CQ

On 11/23/2016 2:02 PM, Dave Brown wrote:
> Looking for an eight inch (~20cm) length of a flexible equivalent or
> near equivalent to UT-141. Ideally no more loss that UT-141 and
> preferably less.
> Any suggestions as to where I might get this without selling the house?
> 73
> Dave, ZL3FJ
>
>
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