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RE: [stationpro] Re: Secondary antenna switch needed

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  • Jim Garland
    Oops, sorry Sebastian. I forget that it was a separate document from the instruction sheets. I ve attached it to this email. 73, Jim W8ZR _____ From:
    Message 1 of 4 , Jul 9, 2012

      Oops, sorry Sebastian. I forget that it was a separate document from the instruction sheets. I’ve attached it to this email.

      73,

      Jim W8ZR

       


      From: stationpro@yahoogroups.com [mailto: stationpro@yahoogroups.com ] On Behalf Of kc0cqq
      Sent: Monday, July 09, 2012 3:01 PM
      To: stationpro@yahoogroups.com
      Subject: [stationpro] Re: Secondary antenna switch needed

       

       

      Hi Jim,

      I got the Network PCB in the mail today - Thanks much. I cannot seem to find the cutting template for the enclosure that you refer to in the Network Manual. Do I download it from somewhere?

      Thanks again & 73,
      Sebastian - NS0W

      --- In stationpro@yahoogroups.com, "Jim Garland" <4cx250b@...> wrote:

      >
      > Hi Sebastian,
      >
      > Sorry to take so long responding to your inquiry, but I was in WDC over
      the
      > holidays visiting my son and his family. My visit coincided with the
      > nightmarish storm which pounded the eastern seaboard, and we were without
      > power for several days.
      >
      > I don't see any reason why your switching idea wouldn't work fine. I'll
      > drop a network PCB in the mail for you (no charge). Let me know how the
      > arrangement works out.
      >
      > 73,
      >
      > Jim W8ZR
      >
      >
      >
      > _____
      >
      > From: stationpro@yahoogroups.com
      [mailto:stationpro@yahoogroups.com] On
      > Behalf Of kc0cqq
      > Sent: Monday, July 02, 2012 10:45 PM
      > To: stationpro@yahoogroups.com
      > Subject: [stationpro] Secondary antenna switch needed
      >
      >
      >
      >
      >
      > Jim,
      > I briefly discussed this problem with you in
      w:st="on">Dayton in 2011 but at that time
      > I have not quite thought the problem through. I am only getting to
      > implementing my StationPro II now. Here is the problem again:
      >
      > I use a SDR-IQ as a panadapter in a somewhat unconventional way on my
      > radios. The SDR-IQ is fed from an antenna splitter on the RX only line on
      > all 3 radios. This means I need a second RF switch unit in parallel
      without
      > the amplifier switching part that will switch the SDR-IQ input to each of
      > the radios. Initially I planned to implement this by means of an Ethernet
      > splitter that takes the RF unit control signals to a home brew board with
      3
      > relays that drives a 3-way 24V coax relay (which I happen to have) - then
      I
      > noticed the StationPro "networking unit" that will actually do
      what I want
      > to do without having to mess with 24V.
      >
      > There are a couple of outstanding questions:
      >
      > 1. Will the Ethernet cable and circuitry handle 2 units in parallel. I
      think
      > the relays pull about 35mA - so we are talking about 70mA which sounds
      > reasonable to me.
      >
      > 2. I will obviously have to make a RJ-45 to RJ-25 interface cable. I
      already
      > have a commercial Ethernet splitter that just plugs in - so no mods or
      fancy
      > Y-cables needed.
      >
      > 3. I guess I will have to ask Harbach how much they will charge for a
      > networking unit since I do not "qualify" through the normal
      channels.
      >
      > Any reason why this would not work or any better ideas?
      >
      > 73 de NS0W
      > Sebastian.
      >

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