kiheiman

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  • in reply to: EF-QUAD In an Inverted L mounting? #3461
    kiheiman
    Participant

    I have a similar question. I live in a HOA restricted neighborhood. My house has a concrete tile roof and is 54′ gable to gable. I could either droop the final 10′ of wire down on the far end of the house. Or I could shorten the antenna to 54 feet and use an antenna tuner at the balun box. Has anyone tried anything similar?

    73
    Clint
    W7KEC

    in reply to: Par Endfedz for Attic #1408
    kiheiman
    Participant

    I would be interested to see how it works out in your attic. I currently have a DX-EE in the attic and it works pretty good. It is only 44′ long, so I run it end to end. Since the EF Quad is about 65′ long, I need to figure out which end needs to have a bend. Or I could run the far end out the gable roof vent and run the extra wire down the soffit of the roof.

    in reply to: High SWR on 10M with EF Quad #1236
    kiheiman
    Participant

    I added a 9″ piece of wire to the existing 10M stub. That brought the resonant point down to 1.8 SWR. The 2.0 SWR points are now 28.3 Mhz to 28.9 Mhz. I am still curious as to why the SWR would not be lower. I checked the other 3 bands and they are still about 1.2.

    73
    Clint

    in reply to: High SWR ON EF QUAD #1021
    kiheiman
    Participant

    We took the EF Quad to the park and set it up out in the open with no surrounding objects. 30 foot pole on one and and 7 foot pole on the other end. Checked the SWR and the resonant point was still 5.8 MHz. We laid the antenna wire on the ground and I stepped off the length – 25 paces. So the antenna wire was 75 feet long. We took it back to the house and cut off 10 feet of wire. We then did three runs for shortening the length. Ended up at 62 feet long. Nice resonant point in the 40M and 20M bands, with nice wide bandwidths. The antenna was resonant at 21.8 Mhz on the 15M band and a little high on the 10M band. We will need to trim the 15M and 10M stubs to get them to where they need to be.

    73
    Clint

    in reply to: High SWR ON EF QUAD #1014
    kiheiman
    Participant

    Here are the SWR readings:

    7.000 = 6.8
    7.100 = 7.0
    7.200 = 7.3

    73
    Clint

    in reply to: High SWR ON EF QUAD #1013
    kiheiman
    Participant

    The heat pump is off to the side of the antenna wire. We used the following ways to check SWR – Youkits Antenna Analyzer, MFJ-259, Diamond SX-600 SWR Meter, and SWR meter on Kenwood TS-2000 transceiver. We did not tie back the folded over wire as you recommended – just a few turns around the main wire so that the folded back wire runs in parallel with the main wire and a turn about every six inches.
    We moved the antenna so that is was about 25′ away from the heat pump – SWR readings are still bad. We put a 50 ohm dummy load on the end of the coax and the SWR was 1:1 over all the bands. Will need to get you the SWR readings that you requested.

    73
    Clint

Viewing 6 posts - 1 through 6 (of 6 total)