Re: [amsat-bb] NO-84 questions

8 Aug 2016

      Those satellites all had resonant 10 meter antennas (as the downlink).
Even so, attenuation when the band is open is easily noticeable.
NO-84 has a non-resonant whip for the uplink. It's 72" long. A
full-size 1/4 wave monopole would be 99.8". That presents an
additional challenge requiring higher uplink power (WB4APR recommends
75 watts to a 1/4 wave vertical, about 3 times what was suggested at
launch).
73,
Paul, N8HM
On Sun, Aug 7, 2016 at 8:55 PM, Joe nss@mwt.net wrote:
...
if it did then Oscar 7 and similar would not have worked, how about the
Russian birds too 15 and 10 meters.
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 8/7/2016 7:07 PM, Mvivona via AMSAT-BB wrote:
...
Just curious. Doesn't the ionosphere have an attenuation on 10 meters?
Michael KC4ZVA
On Aug 7, 2016, at 7:28 PM, Mark Lunday wd4elg@triad.rr.com wrote:
2315Z pass.
I could see someone in the passband, but it showed as 6 traces rather than
one.  Does that mean the transponder was overdriven with PSK?
I attempted to see if I could get through and at least see my downlink,
but
no luck.  I figured even without the Doppler-compensated software, I
should
see my signal..30 watts to an off-center-fed dipole at 56 feet.
Thoughts/suggestions welcome.
Mark Lunday, WD4ELG
Greensboro, NC  FM06be
wd4elg@arrl.net
http://wd4elg.blogspot.com

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Re: [amsat-bb] NO-84 questions

Paul Stoetzer