[amsat-bb] Re: [CubeSat] advice request for FUNcube

[i8cvs]

Hi Jan and Graham

If the biggest problem in a Cubesat is making the short bends as
possible it seems that the RG-178 B/U is preferable because it is
PTFE  rated at -55 to +200 °C and only 0.072" in diameter and
its minimum bending  radius is 9 mm against 15 mm for the type
RG-188 A/U

The RG-178 B/U can be used with  IPEX MHF connector, MMCX
Connector, MCX Connector, SSMB Connector and SMA Connector
or directly soldered in place if possible.

I have a few meters of RG-178 B/U and if necessary I can send
to you a piece of it into an envelope for test and experimentation.

See the RG-178 B/U specifications in the following page.

http://www.shbing.com/rg178-e.htm

73" de

i8CVS Domenico

----- Original Message -----
From: "Jan King" <jking at eclipticenterprises.com>
To: "Graham Shirville" <g.shirville at btinternet.com>
Cc: "AMSAT BB" <amsat-bb at amsat.org>; "CubeSat @ CubeSat.org"
<cubesat at cubesat.org>
Sent: Friday, April 22, 2011 2:22 AM
Subject: [amsat-bb] Re: [CubeSat] advice request for FUNcube


> Graham,
> My vote would be RG-188A/U.  See my AMSAT-IARU Link Model Rev 2.4.3; Line
> Loss Tools and Tables Tab; First entry.  Use the calculator there to get
> losses at various frequencies.  It's PTFE wrapped and there are SMA and
SMC
> connectors made for it.  Or you can solder it directly to the transmitter
> output, if you are careful.  It's pretty flexible and can have about the
> shortest bend radius of any coax available.  In the end, however, that
might
> be your biggest problem in a Cubesat - making the short bends.
> Jan
>
>
> On Wed, Apr 20, 2011 at 9:41 PM, Graham Shirville <
> g.shirville at btinternet.com> wrote:
>
> >  hi All,
> >
> > A simple question this time!
> >
> > What is the best coax cable to use in a cubesat? Size, flexibility/min
> > radius, existing space heritage, ease of applying connectors are our
main
> > design drivers - we are only using UHF and VHF so losses are not going
to be
> > too much of a problem hopefully..
> >
> > many thanks in advance
> >
> > 73
> >
> > Graham
> > G3VZV
> >
> >
> > _______________________________________________
> > CubeSat mailing list
> > CubeSat at cubesat.org
> > http://lists.cubesat.org/mailman/listinfo/cubesat
> >
> >
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