[aprssig] Return loss bridge

[Bob Donnell]

Hi Scott,

Minicircuits has a 10 dB coupler with some decent directivity

http://minicircuits.com/pdfs/ADC-10-4.pdf

The first trick will be to get it hooked up with connectors - but that was
with a very quick search, and it covers a lot wider bandwidth than you asked
for.

73, Bob, KD7NM 

-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Scott Miller
Sent: Tuesday, September 08, 2009 10:55 AM
To: TAPR APRS Mailing List
Subject: [aprssig] Return loss bridge

My HP 8920A has the tracking generator and spectrum analyzer options, so if
I can find a suitable return loss bridge or directional coupler I can use it
to plot VSWR for antenna testing.  I've found lots of plans out there, but
not many affordable assembled units.  Anyone know where I can get one for a
reasonable price that covers at least 140-160 Mhz?

On a related note, I've got a batch of 2 meter 'Hershey kiss' type magmounts
on the way in the next month or so, and they're coming factory-tuned for
144.39 Mhz.  The factory's test report looks good, but it'd be nice to be
able to reproduce the results here.

73,

Scott
N1VG



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