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antenna 1 high SWR, antenna 2 low SWR

Everything else being equal, why would Antenna 1 show off the scale SWR while Antenna 2 is low.

Answers

  • Jim GilliamJim Gilliam Member
    edited February 10

    one antenna on the tuner the other one isn't?
  • Russell LockeRussell Locke Member
    edited February 10
    I don't think I made myself clear now that I read the question again and your answer.  Only one antenna in use.  Switching the coax from RADIO antenna 1 to RADIO antenna 2 is the issue.  I don't see why the SWR's would be different unless there is a problem within the radio.  I know that the point is to be able to use two antennnas with one radio but I was trying to get the SWR's down for a new antenna and just tried switching the coax on the radio.  It worked but I don't understand why.
  • K5CGK5CG Danny Member ✭✭
    edited February 10
    Are you  sure you switched the TX and not only the RX to both antenna ports?
  • Pat N6PATPat N6PAT Member ✭✭
    edited February 10
    It sounds like the active slice is still pointing to TX1. You need to change that in the active slice. It doesn't change by itself just because you moved the coax to TX2

    Then you should retune
  • N8AUMN8AUM RETIRED Member ✭✭
    edited February 10
    Was the tuner ON with ANT 1 ?
  • Russell LockeRussell Locke Member
    edited February 10
    I realize that just moving the coax will not change the active antenna without changing it in the slice.
  • Russell LockeRussell Locke Member
    edited February 10
    I'm fairly certain I switched both TX and RX.  I don't know what is meant my "ON."  I didn't need to use the internal tuner for Antenna 2 and Antenna 1 would not tune.
  • Dan-N7HQDan-N7HQ FlexRadio Employee, Community Manager admin
    edited April 17
    Hi Russell,

    When using a single (RX/TX) antenna on ANT2: make sure your coax is connected to ANT 2 and the slice indicates both the RX (blue) and TX (red) are set to ANT2 as indicated below.  If this configuration works fine and you see high SWR when you switch everything back to ANT1, please open a helpdesk ticket and we'll diagnose the issue further. 
     


    73,
    Dan

  • Russell LockeRussell Locke Member
    edited February 13
    Dan,
    I checked again and yes, both TX and RX (red and blue) were on Ant 1 and SWR's were full scale.  Went back to Ant 2, TX and RX (red and blue) and SWR was 1:1.2.  I'll open a ticket, more because I'm curious than because I need more than one!

    Russ
    K5FJR
  • Tim - W4TMETim - W4TME Administrator, FlexRadio Employee admin
    edited February 11
    All things being equal and configured properly, this would be indicative of a hardware issue.
  • Russell LockeRussell Locke Member
    edited February 14
    I agree.  And as I said, I really don't need both Ant1 and Ant 2.  It would not be worth sending the radio back to Austin over.

    Russ
    K5FJR
  • edited February 12
    Do you have different lengths of coaxial cable linking the two ouptus of the switch and the rig? They must be exactaly equal in lenght if you do not have a balun or an unun at your antenna feeding point, The difference in SWR readings can be the result of a comon mode current running outside of your transmission line, because different lenghts of  the line gives different SWR readings if you are checkng SWR on the higher bands. One meter difference would be very significant on 10 meters without a balun.. This should not be the case if you have a balun at the feeding point of your antenna. Then the length of the coaxial is uninportant.

    Luis EA3OG. 
  • John KB4DUJohn KB4DU Member ✭✭
    edited February 13
    Russell;

    Curiosity question. Do you receive signals the same on ANT1 and ANT2, same level etc?
  • Russell LockeRussell Locke Member
    edited February 13
    I guess I really have to work on my descriptions of problems.....I have ONE antenna with ONE coax lead from the antenna to the radio.  ALL I'm doing is switching the coax from the Ant 1 connection on the rear of the 6300 to the Ant 2 connection on the same 6300.  The length of that coax does not change as I unscrew it from Ant 1 and move it to Ant 2.  How is a balun going to help that?
  • Russell LockeRussell Locke Member
    edited February 13
    Good question.  I don't think I noticed but I am going to check it out now.  And question answered:  No difference in received signal level on Ant1 vs Ant 2.
  • N8AUMN8AUM RETIRED Member ✭✭
    edited February 13
    If u have a sig gen source see if theirs any difference between Ant 1 & Ant 2 for starters 
  • Kevin J. DarrahKevin J. Darrah Member ✭✭
    edited February 13
    You were perfectly clear.... people just don't comprehend what they read. It was very simple the way you stated it. Some of these comments I read above were rediculous. 
  • Tim - W4TMETim - W4TME Administrator, FlexRadio Employee admin
    edited February 13
    Russell, I recommend that since what you are experiencing may be a hardware issue that you open a HelpDesk support ticket to have once of our technical support engineers work with you directly.
  • Russell LockeRussell Locke Member
    edited February 15
    I opened one.
  • Rick  WN2CRick WN2C Member
    edited February 14
    If it is under warranty it would be. In the future you may want to have the use of ant 2 and having it fixed after the warranty expires may be costly.
  • Tim - W4TMETim - W4TME Administrator, FlexRadio Employee admin
    edited February 14
    There was a course of action recommended in your ticket but we never received any response from you.
  • Russell LockeRussell Locke Member
    edited February 15
    Tim,

    I tried the reboot and it worked!  Thanks!

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