The bandwidth on the Alexloop.

The next step in my Alexloop tests is the bandwidth in which the loop has. Again the antenna is mounted in a bedroom/office on the second floor of the house so that may have some affect on the SWR. I do plan on getting the loop in the out doors were the ceiling, walls and surrounding furniture do not have an affect on the loop. Below is the bandwidth results.
28.004 (SWR at 2.2) to 28.060 (SWR at 2.1) around 60 Khz of bandwidth.
21.020 (SWR at 2.0) to 21.070 (SWR at 1.7) around 50Khz of bandwidth
14.000 (SWR at 2.1) to 14.035 (SWR at 1.9) around 35Khz of bandwidth
10.110 (SWR at 1.8) to 10.125 (SWR at 1.9) around 15Khz of bandwidth
  7.005 (SWR at 2.5) to 7.015 (SWR at 2.6) around 10Khz of bandwidth
 I did however use the ATU on the KX3 and the SWR was flat when used on all bands so if I want I can use the tuner and increase the bandwidth of the antenna. I do know that my attic dipole on 10Mhz the SWR is about 9.1 to 1 and the tuner will flatten that out and I have made lots of milli watt contacts all over the world. So the next step is to get this antenna out doors and give it a whirl out there and see how it does.

Mike Weir, VE9KK, is a regular contributor to and writes from New Brunswick, Canada. Contact him at [email protected].

5 Responses to “The bandwidth on the Alexloop.”

  • Mike VE3WDM:

    Hi folks just realized from a fellow blogger that I had put the bandwidth for 30m at 10Mhz..should be 10KhZ. Sorry about the typo.

  • Ron W0EAX:

    Mike, have you been able to operate using a coax run longer than the supplied 10 foot section you talked about in your first posting?
    Ron Melancon W0EAX

  • Mike VE3WDM:

    Good evening Ron, I have tried a piece about 10 extra feet and it was a no go. I was not able to get the SWR down…but…having said that I will be contacting Alex from Alexloop and asking him about this. I did have a coax switch and a jumper piece of coax from the switch to KX3. It’s not conclusive as of yet and I will contact Alex just to make sure.

  • Sergey UA6LPN:

    Good evening Mike,
    http:/ —- message ESET NOD32 Antivirus 6.0.306.2 Virus base (8259 23/04/2013)

    HTML/ScrInject.B.Gen – VIRUS!!!!!!
    Mike, tell Alex to do a scan site!!!!!

  • Mike VE3WDM:

    Sergey thanks for the info.

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