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Thread: Homebrew antenna feedthrough panel

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  1. #1

    Default Homebrew antenna feedthrough panel

    I live in a rent house, so drilling through walls/floors with conduit simply isn't an option. I don't have just a whole lot of money to throw around, so, I also couldn't afford to buy anything but materials. My labor is cheap, so, it wasn't even an option to buy one. Off to the shop!

    I started with what I call "plastic wood", which I've heard called PVC board. It's not as cheap as wood, but, it also doesn't rot. I bought about 10ft of it, knowing that I could easily screw up, and need more. I ended up using less than I expected.. There is some truth to the saying of "measure twice, cut once".

    I then shined up a piece of scrap aluminum, cut to the size I needed, screwed it on to the plastic wood, and drilled the appropriate sized holes for the ground, the bulkhead, and polyphaser. It was actually very simple. Time consuming, but, simple. I also added some high density foam stripping around the edges to help keep out the weather.


    Here's the finished results.



    A little closer


    The backside


    The backside a little closer


    Mounted in the window


    All connected up


    After about 30 minutes of cleaning up the desk area by wall mounting my network gear, and voila! My very simple but effective ham shack desk.


    The only thing I will need to do since these are double windows, is to find a way to mount another piece of plastic wood under the interior window. I've already cut out a slot in it filled with more high density foam weatherstripping to accommodate the cables and let me close both windows. The problem is, the interior window closes lower, and when the second piece is installed, it doesn't line up with the pass through block. Oh well, it'll give me something else to work on

  2. #2
    Join Date
    Feb 2002
    Location
    Dallas, TX USA
    Posts
    711

    Default

    Excellent job, Brian. And, this is easily expandable should you have need for more feedthrough connections; antenna, emergency battery power, etc.
    73 de Mike, N5RLR

  3. #3
    Join Date
    Mar 2003
    Location
    3763 Lyle Avenue, North Pole, AK 99705
    Posts
    22,422

    Default

    A splendid job indeed.

    And for the less handy, I notice that MFJ now makes a universal feedthrough panel.

    When I lived in a log cabin, I simply poked all my lines through chinks in the logs. Now that I live in a newfangled house I use the dryer vent.

    Eric
    "The more you know, the less you don't know."

  4. #4
    Join Date
    Mar 2008
    Location
    Marietta, GA (EM73RW)
    Posts
    485

    Default

    Just built one the other day myself. Where did you get your bulkhead connectors from?

  5. #5

    Default

    Quote Originally Posted by KJ4CTS View Post
    Just built one the other day myself. Where did you get your bulkhead connectors from?
    The bulkhead for my dipole was given to me by a fellow friend/ham, but I've found them for less than $3 a piece online. I just hated to buy any online because the shipping would be more than the part, and I only needed one of them.

    The polyphaser for my wireless bridge was one from a junk box at work.

    The allthread for the ground was from a parts bin at my cousin's barn/workshop.

    The only expense of all this was the plastic wood that cost me about $20. Other than that, all the parts were scavenged or given to me.

  6. #6

    Default

    Nice job.
    I built one out of wood that fits a 36"wide window frame by 5" high.
    Window needed to seal against the panel, outer storm window needed to seal against the panel and it needed to be full width (in/out) to be able to insulate it for winter and take a window air conditioner in summer set on it's flat top, and seal.
    The job needs to be quite precision to effect all the sealing requirements.
    Final job just fits with no sill or other alterations and is removable.

  7. #7
    Join Date
    Feb 2005
    Location
    Charlottesville, VA
    Posts
    26

    Default

    Nice job! I think that stuff insulates better than wood too.

    Check Universal Radio for feed-thrus, they have all sizes.

    And for probably the first time I remember seeing on the forums, you spelled "voila" correctly.

  8. #8
    Join Date
    May 2002
    Location
    Crest, Ca (just East of El Cajon)
    Posts
    29,318

    Default

    I tried to make something like that, but I have 35 coaxes going through the window!!! So Ijust drilled holes in a block of wood like that and drill more holes when I add more coax. Have to RTV it really well to keep the SPIDERS out!
    I love my cats!
    PHOEBE and PENELOPE MEW!

  9. #9
    Join Date
    Jun 2005
    Location
    Savannah, GA
    Posts
    408

    Default

    I built one of these back in 2000 and found that it worked quite well.

    Just ordered the parts to build another.

    The only difference in mine and yours is that each feedthrough was isolated from the others.
    Last edited by NC5S; 09-03-2009 at 01:14 AM.
    I don't suffer from insanity. I enjoy every minute of it.

  10. #10
    Join Date
    Dec 2007
    Location
    Holland Mi
    Posts
    84

    Thumbs up HOW ABOUT THE ANTENNA'S ?

    I to live in a rental home as well. I am going with what you did but I have 6 antennas
    2 are wire 1 scanner 1, 2meter 1, 70cm and 1, 10 meter no one has said any thing yet. now I am working on a home-brew 10 meter with 4 radials and a vertical. I have put a pole in the ground in cement and it works fine for the smaller ones but this new one is a lot bigger any ideas ???

    WHAT A GREAT JOB !!!!!

    Thanks
    73's
    KD8HDQ
    Mark

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