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" <jk...@eclipticenterprises.com> To: "Graham Shirville" <g.shirvi...@btinternet.com> Cc: "AMSAT BB" <amsat-bb@amsat.org>; "CubeSat @ CubeSat.org" <cube...@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.shirvi...@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 > > cube...@cubesat.org > > http://lists.cubesat.org/mailman/listinfo/cubesat > > > > > _______________________________________________ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
