[linrad] 2 questions

["Conrad G0RUZ" <conrad@xxxxxxxxx>]

> -----Original Message-----
> From: Conrad G0RUZ [mailto:conrad@xxxxxxxxx]
> Sent: 14 October 2002 00:58
> To: linrad@xxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [linrad] 2 questions
>
>
> Hi Roger am I missing the point re the 4 inputs here. If you
> intend using the WSE RX2500 you will need all 4 inputs for Xpol.
> Horizontal I and Q and vertical I and Q will be produced by the
> WSE RX2500 but I am sure that you of all people have realised
> this. The easiest solution must be  a simple switch box like the
> 2 way 25 pin D connector data switches. I think that the
> screening provided by the box will be adequate if you use
> screened cable for the other interconnections. Beware of earth loops.
>
> If I misunderstood what you were asking please forgive me and let
> me get back to my revision. Yep I finally got round to starting
> that M Eng degree in electronics and telecoms. I am quite sure
> that maths was easier than this when I was 19!
>
> As regards the PSU use 3 amp devices this will surely be enough.
>
> 73
>
> Conrad G0RUZ
>
> > -----Original Message-----
> > From: owner-linrad@xxxxxxxxxxxxxxxxxxxxx
> > [mailto:owner-linrad@xxxxxxxxxxxxxxxxxxxxx]On Behalf Of W3SZ
> > Sent: 13 October 2002 23:42
> > To: linrad@xxxxxxxxxxxxxxxxxxxxx
> > Subject: [linrad] 2 questions
> >
> >
> > Hi, Leif!
> >
> > I have two questions.
> >
> > First, I am preparing powersupply for the WSE RX2500.  It takes +/- 15
> > volts at 0.6 amps as I recall.  But I would like to have powersupply
> > built now to accommodate future needs of 10.7 to 2.5 MHz converter and
> > 144 70 MHz and 70 MHz to 10.7 MHz converters.
> >
> > I had planned to have supply capable of +15 and -15 V at 1.5 amp each.
> > Is this likely to be sufficient for the entire set of converters?  If
> > not what do you recommend?
> >
> > I believe the 10.7 to 2.5 MHz converter also will need other voltages.
> > Is this true, or will it require just + and - 15 V and obtain the other
> > voltages internally.  If it will require other voltages, is it possible
> > for you to specify other voltages and currents now so supply can be
> > prepared?
> >
> > Also same questions for the 144 MHz to 70 MHz and 70 MHz to 10.7 MHz
> > converters.
> >
> >
> > My second question is asked out of laziness (both mental and physical).
> >
> > I would like to have both my homebrew receiver and The Time Machine
> > plugged into the Delta44 with one using inputs 1 and 2 and the other
> > using inputs 3 and 4, and I was hoping to be able to use the 'U' command
> > to select appropriate dsp / audio devices to allow this.  Then I would
> > have linrad setup in one directory to use 1 and 2 for homebrew receiver,
> > and linrad set up in another directory to use 3 and 4 for The Time
> > Machine.  Then I wouldn't need to keep plugging and unplugging cables.
> > This is the physical laziness part.
> >
> > But my first 8 or so guesses as to which of the MANY dsp choices
> > possible to use (as listed in the 'U' command) did not give a solution
> > that had inputs 3 and 4 being used so that proper output from Linrad was
> > obtained. Do you know off hand if there is a combination that will allow
> > inputs 3 and 4 to be used in this manner?  This is the mental laziness
> > part; I thought if you knew the answer, and if the answer was that this
> > will not work, then I could save myself the time spent to research all
> > of the other choices.
> >
> > Thanks in advance!
> >
> > I am looking forward to the arrival of the WSE RX2500 in the next few
> > weeks ;)
> >
> > 73,
> >
> > Roger Rehr
> > W3SZ   FN20ah
> > 2 Merrymount Road
> > Reading, PA  19609-1718
> > http://www.qsl.net/w3sz
> >


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