[amsat-bb] Diplexer recommendation

[Brad Brooks]

I reckon the duplexer is required as there is no direct connections to the 70cm antenna.

Brad WF7T

On Jan 8, 2018, 3:20 PM -0600, Greg D <ko6th.greg at gmail.com>, wrote:
> Hi Rico,
>
> So, two questions:
>
> First, what are you planning to use for your radio(s)? I'm a bit
> puzzled by the need to swap Tx and Rx connections, if you are using a
> diplexer. And, most of the satellite operations I do involve either two
> separate radios, or a satellite radio that has separate VHF and UHF
> antenna connections. In those cases, you'd not need the diplexer at
> all, since the purpose of a diplexer is to use one feed line to cover
> two antennas. Could you share your "two diplexers and two switches"
> diagram?
>
> Second, that's a really cool antenna that you have built. Are the plans
> available online somewhere?
>
> Greg KO6TH
>
>
> Rico van Genugten wrote:
> > Hi all,
> >
> > I'm slowly assembling my satellite base station setup bit by bit, I have
> > recently mounted an antenna system on my roof consisting of two
> > perpendicular VHF/UHF open-sleeve yagi's mounted at a fixed elevation of 25
> > degrees on an azimuth rotator, more info here:
> > https://twitter.com/PA3RVG/status/942710621375815680
> >
> > So I have two feed lines coming into the house, both suitable for VHF and
> > UHF operation. I want to be able to independently select one of the two
> > antennas for RX and TX. This can be realized using two diplexers and two
> > switches, but now for the million dollar question: Which diplexer?
> >
> > I'm curious to know which diplexers you guys use if you use them, and which
> > can be recommended in terms of insertion loss, VSWR and isolation. If you
> > believe the manufacturer specifications they are all great, but I'm more
> > interested in real life performance or test measurements.
> >
> > 73,
> > Rico
> > PA3RVG
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> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
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> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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