[amsat-bb] Re: ISS power output ? MM

[MM]

The Kenwood D700 on ISS has been specially modified
not to exceed 25 watts.  The stock terrestrial version
will run 45-50 watts.

The default software setting on the ISS D700 is set
for 10 watts.
Every time the crew powers on the radio or hits a PM
Key, the power is reset to 10 watts.
This setting is for all modes, Packet, Voice, etc.
Power levels available to the crew are 5, 10 and 25
watts.

There are tentative plans to reprogram the D700 on ISS
and turn down the power to 5 watts.  The reason for
the change is two fold, the 5 watt signal is good
enough for most terrestrial stations running a 0 dBd
antenna and the lower letting will keep the radio
cooler.  In Space there is NO Convection Cooling, so
all electronics run hotter.  The primary cooling for
the D700 is from the fan mounted to the back of the
heat sink.

www.marexmg.org

Miles

--- Zachary Schrempp <zach.km7i at gmail.com> wrote:

> I have heard in the past that it is 10 W.
> 
> Zach Schrempp
> KM7I
> 
> On Dec 29, 2007 7:08 AM, Andrew Rich
> <vk4tec at people.net.au> wrote:
> > Does anyone know what power the ISS is running on
> 145.825 ?
> >
> > I see it is a D700, perhaps on 5 watts ?
> >
> >
>
----------------------------------------------------------------------------
> > Andrew Rich VK4TEC
> > vk4tec at people.net.au
> > http://www.tech-software.net
> >
> >
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