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Re: [30meterPSKGroup] WWCR 5070kHz Harmonic Re: AM Broadcast on 10.140MHz

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  • Dan Romanchik KB6NU
    A trap filter for a 100 kW transmitter would be an interesting thing to build/see. 73! Dan KB6NU ... CW Geek and MI Affiliated Club Coordinator Read my ham
    Message 1 of 13 , Jun 27, 2008
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      A trap filter for a 100 kW transmitter would be an interesting thing
      to build/see.

      73!

      Dan KB6NU
      ----------------------------------------------------------
      CW Geek and MI Affiliated Club Coordinator
      Read my ham radio blog at http://www.kb6nu.com
      LET'S REALLY MAKE THE ARRL THE NATIONAL ASSOCIATION FOR HAM RADIO


      On Jun 27, 2008, at 1:47 PM, expeditionradio wrote:
      > > Ian G3NRW wrote:
      > > Second harmonic of WWCR in Tennessee?
      >
      > Hi Ian,
      >
      > You are probably correct.
      > WWCR has political programming,
      > and it is very likely that the
      > the 10MHz propagation is just about right
      > for the stations who report hearing it.
      >
      > It would not take more than a few watts
      > of radiated power of the harmonic
      > for it to be heard.
      >
      > A 100kW transmitter, with -80dBc harmonic
      > suppression could probably be heard by
      > hams on this "weak signal" part of the band.
      >
      > I would not want to be the transmitter engineer
      > at that site... they may need to build a trap.
      >
      > Bonnie VR2/KQ6XA
      >
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