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Suddenly no reception on antenna one and no transmit on either, infinite SWR on TX

Russ Locke
Russ Locke Member ✭✭
Suddenly I had no reception on antenna 1.  I switched my antenna (I only have one) to antenna 2 and now I had RX.  BUT when I hit the Tune function, the SWR's went off the chart and I had to shut down the radio.  I rebooted it and then tried to Xmit on antenna 2.  SWR's off the chart again.  No signal at all when I attach my antenna to Antenna 1.  I had not disconnected the antenna at the pass through, this just came out of the blue.  Any ideas? 

The radio is a 6300 and the software is latest, 2.4.9.


  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin
    edited April 2019
    Hi Russ

    A few things.  

    First, can you check the antenna with another device like an analyzer or another radio?  

    Can you do an SWR test to a dummy load?

    If you don't have any of the above, then I would export your profiles to save your settings and then do a radio reset.  And then, test again.

    If that doesn't work and you have confirmed the antenna and all jumper cables are ok, then it would be time to open a support ticket.


  • Mark WS7M
    Mark WS7M Member ✭✭
    edited March 2019
    For the receive part it could be a blown ESD diode but I don't think that affects TX.
  • N8FNR
    N8FNR Member ✭✭
    edited June 2020
    I had some RX weirdness like this earlier in the week, Saved my profiles, did a reset and everything was good.

    Zack N8FNR
  • Russ Locke
    Russ Locke Member ✭✭
    edited March 2019
    I found the problem, mostly operator error (the first place to look.....)  Thanks for the suggestions.
  • N6OIL
    N6OIL Member ✭✭
    edited March 2019
    Details, please.
  • Frank Smith
    Frank Smith Member
    edited March 2019
    I have a similar problem. Could you  share your solution?

    Frank Smith, WS1MH

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