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Re: Trying AO-40



If you skip the equation and tune in the beacon, set the uplink to .666, and
tune away from the beacon with reverse tracking before finding yourself, you
can fully ignore any downconverter drift. That is what makes it so easy.

73, Drew


----- Original Message -----
From: "Don Woodward" <dbwoodw@alltel.net>
To: "Andrew Glasbrenner" <glasbrenner@mindspring.com>; "Reinhard Schulze"
<dc8ts@onlinehome.de>; "Jon Ogden" <na9d@speakeasy.net>
Cc: "David Rush" <david@davidarush.com>; <amsat-bb@AMSAT.Org>
Sent: Sunday, June 01, 2003 1:57 PM
Subject: Re: [amsat-bb] Trying AO-40


> The conversion equation I have used in the past is:
>
> 2836.99 - S2RX = UTX
>
> so...
>
> 2836.99 - 2401.323 =  435.667
>
> This assumes no Doppler or error/drift in the downconverter.
>
> I have a conversion chart at: http://kd4app.webhop.org/ao40/conversion.htm
>
> Don Woodward
> KD4APP
> AMSAT 33535
> kd4app@amsat.org
> http://kd4app.webhop.org
>
>
> ----- Original Message -----
> From: "Andrew Glasbrenner" <glasbrenner@mindspring.com>
> To: "Reinhard Schulze" <dc8ts@onlinehome.de>; "Jon Ogden"
> <na9d@speakeasy.net>
> Cc: "David Rush" <david@davidarush.com>; <amsat-bb@AMSAT.Org>
> Sent: Sunday, June 01, 2003 13:43
> Subject: Re: [amsat-bb] Trying AO-40
>
>
> 35 khz difference is sweeping a lot of QSOs. 435.666 gets you within 10
khz
> every time. There is no substitute for accurate information. If you don't
> know, let someone else answer, because Hardy is right, and you are not.
>
> 73, Drew KO4MA
>
> ----- Original Message -----
> From: "Jon Ogden" <na9d@speakeasy.net>
> To: "Reinhard Schulze" <dc8ts@onlinehome.de>
> Cc: "David Rush" <david@davidarush.com>; <amsat-bb@AMSAT.Org>
> Sent: Sunday, June 01, 2003 12:24 PM
> Subject: Re: [amsat-bb] Trying AO-40
>
>
> >
> > On Sunday, Jun 1, 2003, at 09:23 America/Chicago, Reinhard Schulze
> > wrote:
> >
> > > I wonder about 435.700 MHz as a corresponding uplink frequency for the
> > > beacon. For me it's abt. 435.666 MHz.
> > > On my website I have compiled some information about
> > > preparing for AO-40 from my experience.
> > >
> > > 73 de Hardy DC8TS/KC2DMA
> >
> > 435.7 is about the theoretical uplink if you chart it out from the
> > published frequency tables.  It may be different for you due to
> > doppler, radio variations, etc.  Regardless 435.666 is still fairly
> > close to 435.7.
> >
> > 73,
> >
> > Jon
> > NA9D
> >
> > -------------------------------------
> > Jon Ogden
> > NA9D (ex: KE9NA)
> >
> > Citizen of the People's Democratic Republik of Illinois
> >
> > Life Member: ARRL, NRA
> > Member:  AMSAT, DXCC
> >
> > Ham Radio Webpage: http://www.qsl.net/na9d   <- Updated on 1/12/03!!!
> > Digital Photography Page:
> > http://homepage.mac.com/jogden/Photography.html
> >
> > "A life lived in fear is a life half lived."
> >                                                - From "Strictly
Ballroom"
> >
> > ----
> > 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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