....and for most of the directional antennas currently being used and tuned for the higher Sat 2m frequencies this means bad VSWR.
On Wed, Oct 23, 2013 at 3:27 AM, Graham Shirville < g.shirvi...@btinternet.com> wrote: > Hi Greg, > > Please have a look at Footnote 1 at the bottom of the 2 metre bandplan: > > "1 - Designers and operators of satellites using this section shall not > transmit below 144,0025 MHz so that a necessary guard band is provided at > the bottom band edge.” > > This shows that it has been thought about and probably means that it could > be used for a nominally 20kHz bandwidth transponder – so long as it has > decent filtering on board which is relatively easy to achieve these days! > > Of course there are very very few “empty spaces” in the 144-146MHz band > and even fewer that have any sort of existing international alignment. > > thanks > > Graham > G3VZV > > -----Original Message----- > From: Greg D > Sent: Wednesday, October 23, 2013 7:07 AM > To: AMSAT BB > Subject: [amsat-bb] Re: New Satellite Segment in IARU Region 2 Bandplan > > Interesting... Does anyone else find it odd (or possibly irresponsible) > to put a satellite allocation right up against the band edge. Didn't > they consider Doppler shift? That renders the lower 3+ khz of a 25 khz > slice unusable. Or is this only for NSS use? > > Greg KO6TH > > > M5AKA wrote: > > New Satellite Segment in IARU Region 2 Bandplan > > > http://amsat-uk.org/2013/10/22/new-satellite-segment-in-iaru-region-2-bandplan/ > _______________________________________________ > 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 > _______________________________________________ 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
