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Re: an amateur satellite for $295



Hi Greg, KO6TH

In early august 1960 I was able to receive the 100 mW beacon carried out
by ECHO-1 operating on 108.000 and 108.030 MHz

My 108 MHz crystal converter uses two low noise triodes 6AN4 in cascode
configuration the best available at that early time maybe 6 or 7 dB noise
figure at best.

The antenna was a cubical quad

The IF was about 32 MHz on a SX-28 Hallicrafters Superskyrider

ECHO-1 was visible by naked eyes like a first magnitude star running
fast in the sky with respect to the other stars.

In early 1960 the 108 MHz band in Italy was a virgin band free of any
type of emission so that aiming manually the antenna toward the sky
it was possible to detect the noise coming from our galaxy the Milky
Way ...........nice to remember !

73" de

i8CVS Domenico

----- Original Message -----
From: "Greg D." <ko6th_greg@hotmail.com>
To: <domenico.i8cvs@tin.it>; <bruninga@usna.edu>; <amsat-bb@amsat.org>
Sent: Sunday, July 23, 2006 7:44 AM
Subject: Re: [amsat-bb] an amateur satellite for $295


> Actually, Echo-1 is exactly what I had in mind...
>
> Greg  KO6TH
>
>
> ----Original Message Follows----
> From: "i8cvs" <domenico.i8cvs@tin.it>
> To: "Greg D." <ko6th_greg@hotmail.com>,"Bob Bruninga"
> <bruninga@usna.edu>,"AMSAT-BB" <amsat-bb@amsat.org>
> Subject: Re: [amsat-bb] an amateur satellite for $295
> Date: Sat, 22 Jul 2006 08:47:32 +0200
>
> Hi Greg, KO6TH
>
> Read please the following article
>
> http://msl.jpl.nasa.gov/QuickLooks/echoQL.html
>
> 73" de
>
> i8CVS Domenico
>
> ----- Original Message -----
> From: "Greg D." <ko6th_greg@hotmail.com>
> To: <bruninga@usna.edu>; <amsat-bb@amsat.org>
> Sent: Saturday, July 22, 2006 5:51 AM
> Subject: Re: [amsat-bb] an amateur satellite for $295
>
>
>  > Actually, what about bouncing a signal off the balloon, Oscar Zero
style?
>  >
>  > In fact, if you sent a very steady carrier at it, I bet you'd be able
to
>  > "hear" the golf balls inside hitting the skin, by the very tiny blips
of
>  > doppler caused by the skin moving.  Probably below the threshold of
>  > detection... oh well.
>  >
>  > Greg  KO6TH
>  >
>  >
>  > ----Original Message Follows----
>  > From: "Robert Bruninga" <bruninga@usna.edu>
>  > To: <amsat-bb@amsat.org>
>  > Subject: Re: [amsat-bb] an amateur satellite for $295
>  > Date: Fri, 21 Jul 2006 08:46:50 -0400
>  >
>  > Only possible COMMS method from inside to outside I can see is
>  > Accoustic, to modulate the aluminized bubble skin, and then
>  > Laser reflection to recover that on the ground <GRIN>...
>  >
>  > Or, from outside-in, use a wrap-around LCD display on the tiny package
>  > that can display packet messages sent from the ground with high-
>  > power transmitters.  The messages are seen on the on-board
>  > camera that views the items and then to the website.... Bob
>  >
>  >  >>> "Tom Clark, K3IO" <K3IO@verizon.net> 07/20/06 5:44 PM >>>
>  > It appears that the keep the items contained and flying loose within
the
>  > inflatable module(see the graphic at
>  > http://www.bigelowaerospace.com/fly_stuff/items/examples.php), so you
>  > must be prepared to occasionally contact somebody else's item and the
>  > balloon's walls. Also, as Pieter noted, it's not clear how much solar
>  > energy leaks thru the VECTRAN (http://www.vectranfiber.com/)skin if you
>  > want to try some solar mini-panels for power.
>  >
>  > I also note that Vectran has a dielectric constant = 3.3, so when you
>  > design your antennas, you need to take into account that you will be
>  > executing a random walk inside a "balloon" which has a velocity factor
>  > of 1/sqrt(3.3)=0.55 and an aluminized skin.
>  >
>  > Have fun !! -- 73, Tom
>  > ----
>  > Sent via amsat-bb@amsat.org. Opinions expressed are those of the
author.
>  > Not an AMSAT member? Join now to support the amateur satellite program!
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>  > ----
>  > Sent via amsat-bb@amsat.org. Opinions expressed are those of the
author.
>  > Not an AMSAT member? Join now to support the amateur satellite program!
>  > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>  > ----
>  > Sent via amsat-bb@amsat.org. Opinions expressed are those of the
author.
>  > Not an AMSAT member? Join now to support the amateur satellite program!
>  > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
----
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