Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?
SmartSDR v4.1.3 | SmartSDR v4.1.3 Release Notes
SmartSDR v3.10.15 | SmartSDR v3.10.15 Release Notes
The latest 4O3A Genius Product Software and Firmware
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

Anyone having issue's using RXA receive antennas?

k4em
k4em Member, Unconfirmed ✭✭
in Community Topics

Is anyone getting distortion in the panadapter/waterfall when using a dedicated receive antenna? If you're using 100w to 1500w, basically at any power level.

Dave

k4em

Comments

  • n0mdh
    n0mdh Member ✭✭

    I have a W6LVP receive loop on RXA separated by about 60 feet from a G5RV Jr. The G5RV Jr. is driven by a 6600M or a 6300, so a max of 100W. I have not observed distortion effects in the pan adapter when transmitting. I have the null of the loop pointed at the TX antenna.

    How far is your RX antenna from the TX antenna?

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    Dave, can you share a screen shot of what you are seeing please.

  • John KB4DU
    John KB4DU Member ✭✭✭✭

    And some description of the antenna setup? Type, distance between, directionality, etc.

  • Dan Trainor
    Dan Trainor Member ✭✭✭

    I also have a W6LVP receive loop on RXA. I have it mounted on a 4ft tripod. It came with the optional T/R switch which is controlled by RCA TX1. The T/R switch disconnects and grounds the RXA input such that it can not be overloaded by RF during TX. Works good. I use it on higher bands with +8 to +16db pre amp setting. I can achieve a higher S/N in most cases. Loop On the Ground (LoG) is another good RX antenna - 60ft square, 15ft on each side laying on the ground. Very quiet. Dan WA1QZX.

  • John KB4DU
    John KB4DU Member ✭✭✭✭

    I also use a Loop on Ground. Only effective one at the previous QTH next to an Army post. Also less affected by TX. Only drawback I noticed is variable directionality.

  • k4em
    k4em Member, Unconfirmed ✭✭
    edited 3:25PM

    Here are some Pics of a normal display and a distorted one. This occurs on any band, any antenna any power level.

    Dave

    k4em

    PS I tried to post some pics, from my computer and phone,in several different formats; jpg, bmp, png, and get a permission error.

  • KD0RC
    KD0RC Member, Super Elmer Moderator

    Hi Dave, if you send the pics to my QRZ email, I will post them here for you. Once you have more activity here, the automatic anti-spam thing will let you post pics.

  • KD0RC
    KD0RC Member, Super Elmer Moderator

    Here are the pictures that Dave sent:

    distortion.jpg normal.jpg

Categories