I found the receiver to be more stable than ao73 but I also found the downlink to be much weaker than I thought it should be since it supposed to be the same radio as in the ao73.another good pass about midnight tonight to try it out WB8RJY.JEFF
jeff broughton
Hi Jeff,
Many thanks for the report...actually the same radio but as we are sharing the platform with another radio system we "only" have 1/4 wave monopole antennas rather than the full dipoles that we have on FC1.
The actual effects of this difference in practise may be interesting to observe.
73
Graham G3VZV
-----Original Message----- From: jeffory broughton Sent: Monday, December 21, 2015 8:19 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Eo79
I found the receiver to be more stable than ao73 but I also found the downlink to be much weaker than I thought it should be since it supposed to be the same radio as in the ao73.another good pass about midnight tonight to try it out WB8RJY.JEFF
jeff broughton _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Also note that the filter passband is wider in this satellite and is also less flat. This spreads out the power a bit more, and also created a sweet spot. But the RX should be very sensitive, so it should be no problem to work in the entire passband.
Wouter PA3WEG
On Mon, Dec 21, 2015 at 9:41 PM, Graham Shirville < g.shirville@btinternet.com> wrote:
Hi Jeff,
Many thanks for the report...actually the same radio but as we are sharing the platform with another radio system we "only" have 1/4 wave monopole antennas rather than the full dipoles that we have on FC1.
The actual effects of this difference in practise may be interesting to observe.
73
Graham G3VZV
-----Original Message----- From: jeffory broughton Sent: Monday, December 21, 2015 8:19 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Eo79
I found the receiver to be more stable than ao73 but I also found the downlink to be much weaker than I thought it should be since it supposed to be the same radio as in the ao73.another good pass about midnight tonight to try it out WB8RJY.JEFF
jeff broughton _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
On such a small spacecraft, me thinks the radiation pattern of a quarter wave monopole and half wave dipole are more or less the same. At least that is what we see in our EZNEC models.
Bob
we "only" have 1/4 wave monopole antennas rather than the full dipoles
that we have on FC1.
participants (4)
-
Graham Shirville -
jeffory broughton -
Robert Bruninga -
Wouter Weggelaar