[amsat-bb] NO-84

[Ted]

Excellent point, Paul.

28.120 is a long standing default frequency for 10m PSK. It is actually fortunate that 10m propagation has been in the tank and, thus, activity is negligible. Fortunately, the PODX 070 Club does not have any events that will utilize 10m until next year. However, the 10-10 Club has 2 events upcoming where it can be expected that there may be increased activity on 28.120, worldwide: Oct 10 - Sprint - all modes and 11-14 - Digital.

73, Ted
K7TRK

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Paul Stoetzer
Sent: Thursday, August 06, 2015 7:45 PM
To: Robert Bruninga
Cc: amsat-bb at amsat.org
Subject: Re: [amsat-bb] NO-84

Except it's uplink is the terrestrial frequency. We can't tell terrestrial users to not transmit in order to protect the satellite.

This problem (and the problem reported earlier this week) is the reason satellite designers should always be using the international OSCAR subbands for satellite uplinks and downlinks. On 10 meters, that's 29.300-29.510 MHz. No satellite should have an uplink at 28.120 MHz.

Also, why can't the transponder's transmitter be commanded off to prevent it from depleting the battery?

73,

Paul, N8HM

On Thu, Aug 6, 2015 at 9:26 PM, Robert Bruninga <bruninga at usna.edu> wrote:
> We let PSAT go into its first eclipse season with everything on.  Not 
> a good idea.  Now it is trying to dig out of its power hole.  The 
> digipeater is turned off to conserve power, but we need users on the 
> PSK31 uplink to not transmit so that the UHF transmitter does not come up.
>
> It is the PSK31 that is running it down on every orbit.
>
> Bob, Wb4aPR
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Joe
> Sent: Thursday, August 06, 2015 8:51 PM
> To: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] NO-84
>
> I thought this Bird was temporarily shut down.
>
> Joe WB9SBD
> Sig
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
> On 8/6/2015 7:12 PM, Bob Cutter via AMSAT-BB wrote:
>> The 435.35 downlink seems weak to me, anyone else?
>>
>> Bob KIØG
>>
>>
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_______________________________________________
Sent via AMSAT-BB at 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