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[dxatlas] Re: Antenna for Quicksilver Receiver

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  • Phil N8VB
    Hello, It s mainly for DC blocking. The ratio of the reactance of the two caps are somewhat important also to the operation of the circuit - it s easier to
    Message 1 of 8 , Feb 16, 2010
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      Hello,

      It's mainly for DC blocking. The ratio of the reactance of the two caps are somewhat important also to the operation of the circuit - it's easier to see why if you model it in something like LTSpice.

      73 Phil N8VB


      --- In dxatlas_group@yahoogroups.com, Pete Smith <n4zr@...> wrote:
      >
      > For my education, Phil, what are the purposes of the two capacitors in
      > the circuit?
      >
      > 73, Pete N4ZR
      > Visit the Contesting Compendium at http://wiki.contesting.com
      > The World Contest Station Database, updated daily at www.conteststations.com
      > The Reverse Beacon Network at http://reversebeacon.net
      >
      >
      > On 2/16/2010 8:00 PM, Phil N8VB wrote:
      > > Hello,
      > >
      > > On the subject of protection here is possible circuit to use for front end protection of the QS1R if you are in to DIY:
      > >
      > > <http://www.philcovington.com/qs1r_latest/Documents/Schematics/qs1r_rxprot.pdf>
      > >
      > > Also see Q25 in the QS1R FAQ at:
      > >
      > > <http://qs1r.wikispaces.com/QS1R+FAQ> which describes the above circuit.
      > >
      > > Regards,
      > >
      > > Phil Covington
      > > Software Radio Laboratory LLC
      > > Columbus, Ohio
      > > http://www.srl-llc.com
      > >
      > > --- In dxatlas_group@yahoogroups.com, "Mack"<mccormick_mack@> wrote:
      > >
      > >> I plan to add a Quicksilver receiver to my station set up this week for
      > >> multi-band use with CWSkimmer Server.
      > >>
      > >> 1. What antenna are you using? Height?
      > >>
      > >> 2. Is the antenna dedicated to the Quicksilver or are your sharing the
      > >> antenna with a transmit antenna?
      > >>
      > >> 3. If you're sharing the antenna with a transmit antenna is it sufficient to
      > >> place a receiver protector on the front end of the Quicksilver and to short
      > >> the antenna input to ground via a relay during keying? Of course, I
      > >> understand there are many variables here and will measure the input voltage
      > >> to the Quicksilver to ensure I'm not exceeding 0.3mv. A mechanical relay
      > >> error that would send 1.5kw into the input of the receiver does make me
      > >> shudder.
      > >>
      > >> I plan to use this limiter on the input to the receiver:
      > >> http://www.iceradioproducts.com/reconly.html#rflimiter
      > >>
      > >> 73,
      > >>
      > >> Mack de WB4MAK
      > >> http://www.nfarl.org
      > >> http://www.sedxc.org
      > >>
      > >>
      > >
      > >
      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      > >
      >
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