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Re: 1.2ghz uplink



AMSAT has said in the past that both 70 cm and 23 cm uplinks would be
supported with a 13 cm downlink on some schedule to be worked out after
commissioning. However, all discussions of the 3 cm downlink have assumed a
23 cm uplink.

John
KD6OZH

----- Original Message -----
From: "hasan schiers" <schiers@netins.net>
To: <amsat-bb@AMSAT.Org>; "Edward R. Cole" <al7eb@ptialaska.net>
Sent: Friday, 02 February 2001 15:15 UTC
Subject: Re: [amsat-bb] 1.2ghz uplink


> I've been following these discussions and trying to see what kind of setup
> is going to be required. In theory, I had hoped that we could make the
most
> use of existing equipment for one half of what may still be functional on
> the bird.
>
> Uplink: 70cm
> Downlink: 2.4 gig (or whatever it is close to that), with 144 IF.
>
> This way, we can use our existing 70cm radios/amps/antennas and only have
to
> buy a downconverter and antenna.
>
> Why invest in 1.2 ghz uplink gear if 70cm will work?
>
> Is there something wrong with my plan?
>
>
>
>
> ----- Original Message -----
> From: "Edward R. Cole" <al7eb@ptialaska.net>
> To: <amsat-bb@AMSAT.Org>
> Sent: Friday, February 02, 2001 12:21 AM
> Subject: Re: [amsat-bb] 1.2ghz uplink
>
>
> > >From: "Bob V. Johnson" <w7lrd@juno.com>
> > >Hello
> > >The many threads and ideas on s-band reception have been an education
for
> > >me, and I  hope to have s-band receive capabilty soon.  Receiving
> > >telemetry is ok but I would prefer listening to K0BLT' melodeous voice
> > >drifting down from above.  Or Jerry/oe or Paul/vas,  or anyone else I
> > >enjoy  talking to.  I want to start a thread on what is required to put
a
> > >1.2ghz signal 'up there', no politics, guns, cuss words, someones
values
> > >or lack thereof.  I want to learn the requirements needed, as in;
> > >transverters, antennas, link budgets, etc etc.  I am  working on my
> > >microwave-phobia, and this bb is a fantastic resource.
> > >73...Bob...W7LRD
> >
> > Excellent idea, Bob.
> >
> > There have been a couple articles written about L-band requirements, but
> it
> > should be interesting to get the inputs coming from a discussion on
this.
> >
> > To kick it off, here is what I plan to do:  FT-847 driving a DEM
144/1269
> > Tx upconv. with 20w output, thru 100 foot of 1/2 inch hardline to a 45
> > element loop yagi [20 dBi] mounted inside the az-el frame of my 2m eme
> > array.  I should have about 8-10w at the antenna.  I will suffer 3dB
loss
> > using horizontal pol. with the circular-pol satellite.  This should
result
> > in an EiRP of 400-500w [~26 dBw].
> >
> > If not enough ERP, then I have a K9EK-7289 amp to produce 60-120w.
> > Everything in place except the DEM conv.
> >
> > Ed
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

----
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