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Re: AO-40: First uplink trial disappointing.....



Hi Michael:

RE: "...it took me 15min. to find the downlink. 50W in 10ele (indoor) are
enough for AO10 but not for AO40 at that time..."

  I believe that 50Watts to a 10ele indoor is very dangerous to anyone near
the antenna.  Microwave ovens operate near 2.4 GHz. for a very good reason.
This is an ideal freq. to cook food containing moisture, which also includes
the human body.

Good luck.

73,

Woody
KJ4SO



----- Original Message -----
From: "Michael Klomfass" <dh5mk@dh5mk.de>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, May 05, 2001 11:51 AM
Subject: RE: [amsat-bb] AO-40: First uplink trial disappointing.....


> same results here,
> at my first try (at MA166, squint 23deg, 10deg. elevation, 60k km) it took
> me 15min. to find the downlink. 50W in 10ele (indoor) are enough for AO10
> but not for AO40 at that time...  U-AGC is moving around 9-15 !!! only,
> because
> to much uplink power??? i don´t think so. U-AGC was around 8dB in some
> orbits
> (orbit 228 upto 18dB !!!) without any uplink signal.  ...i will have the
> next try
> this night.
>
> 73 de Mike
>
> CU on AO-40
>
> dh5mk@dh5mk.de
>
>
> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of Robert Knoblach
> Sent: Saturday, May 05, 2001 12:35 PM
> To: amsat-bb@AMSAT.Org
> Subject: [amsat-bb] AO-40: First uplink trial disappointing.....
>
>
> Hello,
> my first uplink try with AO-40´s transponder on May, 5´th between
> 08:00 and 09:00 UTC results following:
>
> Location: JN57QS, Bavaria, Germany
>
> RX:        MB with 1.2m Dish S3-S5, loud and clear, all telemetry
>               blocks CRC Ok.
>
> TX:        L-Band :10 Watt rhcp,  1,2m Dish: no signal back to receive!
>               U-Band: 10 Watt rhcp, 13 dB Yagi: no signal back to
> receive!
>               U-Band: 70 Watt rhcp, 13 dB Yagi: very weak signal, S0, no
> SSB possible
>
> 73´s de Robert, DD4YR
>
>
>
>
>
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