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When do I use my PreAmps

Mike-VA3MW
Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin
edited May 2020 in New Ideas
1 votes

Open for Comments · Last Updated

Comments

  • KD0RC
    KD0RC Member, Super Elmer Moderator
    edited May 2020
    Hi Mike, I have been using this technique with a small simplification. I find that I don't need to set to 500 Hz CW and I don't need to worry about the rx settings like eq. When I start up, I just click to an open ant and adjust for the 8 - 10 dB. As propagation changes during the course of the day, I check and adjust accordingly. I also leave the WNB engaged, as that often reduces my noise floor several dB (as much as 10dB on 40 in the evening). 73, Len, KD0RC
  • Mark_WS7M
    Mark_WS7M Member ✭✭✭
    edited May 2020
  • Michael - N5TGL
    Michael - N5TGL Member ✭✭
    edited May 2020
  • Brian Denley  KB1VBF
    Brian Denley KB1VBF Member ✭✭
    edited May 2020
    Len:
    8-10 db measured where?
    Thanks
  • KD0RC
    KD0RC Member, Super Elmer Moderator
    edited May 2020
    Hi Brian, I just eyeball it using the gridlines on the spectrum display.  The right hand scale shows dBm.  I have mine zoomed so that the gridlines are 5 dB apart.  Because the preamp/attenuator is in 8 dB increments, you can't set this too finely, but close enough is good enough.

    73,
    Len, KD0RC
  • Brian Denley  KB1VBF
    Brian Denley KB1VBF Member ✭✭
    edited May 2020
    Thanks Len !
  • KD0RC
    KD0RC Member, Super Elmer Moderator
    edited May 2020
    You're welcome!
  • Alan
    Alan Member ✭✭✭✭
    edited May 2020
  • Russ Ravella
    Russ Ravella Member ✭✭✭
    edited May 2020
    And .... Tim does it again !  Thanks Tim !

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