Build your own DX Commander Multifan Vertical Antenna

Discussion in 'Amateur Radio News' started by W9FFF, Jul 21, 2021.

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  1. W9FFF

    W9FFF Ham Member QRZ Page

    My apologies, I just wanted to confirm, because I believe there were some points in there that may have been missed.

    Thank You for the build - you are correct about oxidation on the cable wingnut points. This did happen with a few of the open designs I tested out. This is something I need to work on correcting for any future builds I make. The PLA (+) lasted a couple of days in the weather before becoming soft and cracking. A shredded tire would be a good way to explain it. The ABS seems to be holding up. However, someone mentioned it really isn't UV Resistant and I should paint it with a layer of black to deflect UV rays.

    I agree, go support Callum. He used a highly tested quality product and his pricing nearly cannot be beat. In case someone didn't watch, my breakdown for this product (Provided I didn't purchase 3 poles, multiple antenna wires for testing, and provided I already had the tools) was at least $200.00. This was for a 5 band version (now 6). Cals 5 band (End of Life) was 204.00$. The time and effort put into making a fake DX Commander was not worth it. I think I even say in the video "You would be stupid to build this instead of purchasing one from Callum". Plus Callum is going to stand behind his product. Now as I mentioned, I had issues with the Jackite Pole and they basically blew me off. Would Callum do that? Nope .

    With that Said, the knowledge I acquired from testing different wires, getting different poles, designing files (and finding breaking points): That was worth it to me.

    AK5B, KM5TX, M1WML and 6 others like this.
  2. W1YW

    W1YW Ham Member QRZ Page

    Yep. Fan monopoles, as I said, are nothing new. Some versions use flagpoles with their 'T' bars to do the fan, for example.

    BTW water condensations are like death and taxes;-)....
    AK5B, M1WML and W9HJ like this.
  3. K4NYX

    K4NYX XML Subscriber QRZ Page

    Great job with the video….. i watched the whole thing and it’s sad people assume instead of getting all the facts. smh.
    W5VAX, KM5TX, M1WML and 4 others like this.
  4. W6EBD

    W6EBD Premium Subscriber QRZ Page

    I am not one to usually jump into the fray of such things, but if you are an avid watcher of Callum's videos, he has said he did not invent this and he encourages people to tinker and to build their own. In fact, he specifically sells the bits separately so you can make up your own verticals. Callum did not invent the 1/4 vertical - what he did do was bring it to market successfully. I for one will not build my own, in fact I own one of Callum's great products. And this is something that W9FFF clearly stated in his video.
    W5VAX, AK5B, M0OXD and 13 others like this.
  5. W9HJ

    W9HJ QRZ Lifetime Member #294 Platinum Subscriber Life Member QRZ Page

    I like it. As I commented on the Youtube channel, I would use ASA filament over ABS as ASA is UV stable. I purchased the 10M SpiderBeam pole as soon as it came in the US store. I use it for POTA with a Chameleon EMCOM antenna. Now that I see what you've done, I might very well fire up my PRUSA Mk3 printer and try to do what you did. Maybe even expand it a bit and see if I can emulate the DX Commander Classic (40, 30, 20, 17, 15, 12, 10 and 6). I like what you did with the screw in endcap from the SpiderBeam pole, I never imagined using it like that.

    I love that you gave Cal credit and wasn't taking away from him. This hobby is about experimenting and hacking together an antenna and you did exactly that. To those who are trying to say you rip Cal off, I wonder if they say the same thing about all the multitude of antennas based on a 49:1 EFHW design? Just saying.
    KM5TX, M1WML, K4MID and 3 others like this.
  6. W1YW

    W1YW Ham Member QRZ Page

    I got the facts just fine. Please: if someone has a useful comment to make, it doesn't give you the right to diss them. If you DON"T find it useful, then skip the comment and read some others. On the air, we have the equivalent phrase: 'spin the knob'.

    Chip W1YW
    AK5B, M1WML and W9HJ like this.
  7. W1YW

    W1YW Ham Member QRZ Page

    It's not a 1/4 wave vertical. He didn't bring anything electrically new to market.

    Callum pre-packaged a nice kit that is a value and saves a lot of time. Good stuff.

    No one said he invented it.
    AK5B and M1WML like this.
  8. NN2X

    NN2X Premium Subscriber QRZ Page

    I like Callum and is Children supporting him. I bought a few items from him, namely, the DX Commander, SOTA pole, and some parts I need to build my mono band 2 ELEMENT Quad...(20M)..(And 20 Meter Mini Quad)

    Support is great, I love his Youtube channels / One can learn some!...And the DX Commander is cheap as heck...And light! I like that...

    I am sure one can build one of these, but this is a kit (From DX Commander), so there is satisfaction on putting it together...

    Cheers, 73's DE NN2X
    AK5B, KM5TX, M1WML and 1 other person like this.
  9. 2E0TWD

    2E0TWD Platinum Subscriber Platinum Subscriber QRZ Page

    Calling it a DX Commander certainly is a slap in the face for Callum McCormick. You should apologise for that, I feel.
    AK5B, WA5KM, M1WML and 1 other person like this.
  10. N6TDG

    N6TDG Ham Member QRZ Page

    First off, let me say I own two DX Commander products, the Classic and the Rapide. I find they work well. I once emailed with Callum about constructing a version to be hung from a tree sans pole. A sort of experiment. Callum puts the element measurements for construction as well as experimentation. You found what others have found---yes, one could build their own version, or just purchase Callum's.

    Personally, I think his poles might be better than what you were able to find on the market and I think you might agree. His aluminum plate design works well and not as cumbersome as the box design you had to design so as to not copy Callum's well thought out construction.

    Your video tread on dangerous ground as we are seeing many of Callum's fans and defenders here. I think you wanted to make a video showing if one could make their own version and at what cost. The end result was that one could---but it might be well easier to just buy the damn thing from Callum and save yourself the headache of sourcing all the " bits and bobs" and Callum might say.

    Frankly, if I were to make my own version for personal use, I would purchase a couple of his poles and roughly copy Callum's dual plate design as well as the spreaders. Those are the design keys that make things a whole lot easier.

    Callum McCormick is an intersting guy to watch. He brought a product to a very niche market, created a youtube channel to market and support that product and seems a genuine guy. His many videos do not include unboxing product and watching the lights go blinky-blink--but shows us how on antenna modeling software a particular design works....Of course after the amount of videos he has amassed, there are going to be spots of ho-hum videos...

    He is an overweight, over 60 (almost) kind of guy that is finding some modest monetary success with the hobby he loves. He represents us "everyman" as he makes a company that employs his son and daughter and wife. Being a small business owner myself, I know how business and life become intertwined until there really is no separation.

    Anyway, I digress. Good job on the video. You proved the point-which was--yeah, one could build their own multi-band fan vertical, but it would be easier and probably less expensive to purchase the current original as all the kinks have been worked out.

    If you want to have some real fun--create a coil for 160m. 80m has already been done for the DXC, (its call the Roly Coil)--having 160m capability will add your name in the pages of DX Commander history.
    AK5B, KC1OCA, KM5TX and 7 others like this.

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