Re: Re: [amsat-bb] Symek IFD Board Installation

["PAT McGRATH" <patricio@xxxxxxxxxxxx>]

Any satellite presently transmitting  38k?

If so which sat and what frequency?


----- Original Message -----
From: "John Melton - Sun UK - ENS" <John.Melton@uk.sun.com>
To: <jbblack@mindspring.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Thursday, March 30, 2000 8:04 AM
Subject: Re: Re: [amsat-bb] Symek IFD Board Installation


>
> Joel,
>
>
> > Thanks for the reply, John.  I now have a question regarding your IFD
> installation.  Are all of your connections (i.e. RF-OUT, RF-IN, and
DATA-OUT)
> connected to the outside pins of the IFD board?
> >
>
> I cannot remember which way round they are.  I will check when I get home
> tonight.
>
> > Second, in the instructions, I thought it said not to connect the GND
> connection as the IFD board was grounded with the shields connected to GND
on
> the 70cm RF board (the mixer and filter connections).  I don't see how
this
> works.  To me, this is isolating the IFD from GND.  Shouldn't the GND
connection
> be "made up" somewhere?
> >
>
> Did you not connect the outer shield of the ptfe coax to ground
connections at
> each end?  The remark in the instructions about not needing to connect to
ground
> was for the power connections as the ground connection is provided by the
outer
> shield of the coax.
>
>
> Let me know if that was the problem,  or am I just reading too much into
what
> you have said.
>
> P.S.  My Icom-821 complete with CT-17 RS-232 interface and IFD board is
for sale
> ;-)
>
> -- John Melton  n6lyt/g0orx
>
>                 Principal Systems Software Engineer
>         ((      Sun Microsystems,
>       (|~~|     Flour Daniel Centre East, Riverside Way
>        `--'     Camberley, Surrey GU15 3YL  England
>        JAVA     Phone: +44 1276 416297  (internal ext 16297)
>                 Email: john.melton@uk.sun.com
>
>
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