[aprssig] Return loss bridge

[ian logan]

Would this work for what you want to do?
http://minicircuits.com/pdfs/ZFDC-10-21.pdf

73,
Ian KC5DAS 
On Tuesday, September 08, 2009, at 01:09PM, "Scott Miller" <scott at opentrac.org> wrote:
>Yikes, that's small.  What I really need is a fully built box, 
>preferably with BNCs.  I just don't have time to spend on building test 
>equipment right now.
>
>I did take about 3 minutes to wire up a serial cable for the 8920 and I 
>can now print test results directly to the PC.  Wish I'd thought to do 
>that a long time ago.
>
>Scott
>N1VG
>
>Bob Donnell wrote:
>> 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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>
>
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