[amsat-bb] AO-51 update/information Re: AO-51 BBS Uplink

Mark L. Hammond marklhammond at gmail.com
Tue Aug 31 07:24:49 PDT 2010

Hello Franciso,

Thank you for your question about the AO-51 PBBS uplink.  At this
time, there is no uplink available.  The reason for this is power
budget.  AO-51 uses a wide-band receiver, called the SQRX, which we
set to 1.2GHz for the PBBS (and for running L-band uplinks during
voice repeater operations as well).    The receiver draws over 100mA
of power, which is rather limited right now.  So, we cannot support
two trasmitters at useable power levels AND the SQRX right now.
Hopefully in the future we can.

For the record--Your frequency and mode is correct--although many
users (including myself) find that using 1268.703, or even higher,
works better.    It simply isn't turned ON.

We are now running (with power management OFF):

FM Repeater, V/U
Uplink: 145.920 Mhz FM (no tone needed)
Downlink: 435.300 Mhz FM at 500 mW

9k6 PBBS, U
Downlink: 435.150 Mhz FM  at 265 mW


Mark N8MH
AO-51 Command Team

On Tue, Aug 31, 2010 at 10:00 AM, Francisco Jiménez-Martín Sánchez
<ea1jm.fran at gmail.com> wrote:
> Hello dear friends,
> Can anyone confirm if the uplink for the BBS in AO-51 is in 1268.700 at 9k6?
> Thanks in advance,
> 73 de Fran EA1JM
> _______________________________________________
> Sent via AMSAT-BB at 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

Mark L. Hammond [N8MH]

More information about the AMSAT-BB mailing list