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Dual Band Tape Measure Yagi
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Mike Hoblinski
I have seen Tape Measure antennas but not sure if their was a dual band version.
I ran across this one. This design dose use some 3D printed parts and Aluminum extrusion for the boom. https://www.instructables.com/Diy-Tape-Measure-Yagi-Antenna-for-Ham-Radio/?utm_source=newsletter&utm_medium=email Mike N6IMF |
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Clint Bradford
Also check out the dual-bander on the ANTENNAS page at work-sat.com ...
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On Nov 16, 2022, at 8:28 AM, Mike Hoblinski <hobergenix@...> wrote:
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Mike Hoblinski
I remember the simple and cheap Yagi built before the tape measure antenna came along. The long square wooden boom with rods. I think the Yagi in the video has a lot of potential for experimenters. Using the aluminum extrusion you can experiment with element spacing by just sliding the elements. The tape measure elements seem to be easily removed so if you make a mistake cutting and turning them they are easily replaced. The 3D printed brackets could be reworked to accept an arrow shaft. Or you could lighten the weight of the antenna by drilling holes in the aluminum extrusion boom. I also wonder if the same design could be reworked into an Elk style antenna. One of the fun things about ham radio is experimentation. And with these tape measure style antennas you're not out too much money if it doesn't work out. I was in a local thrift store and they had a whole box of old tape measures for 2 to 3 dollars each. Mike N6IMF On Wed, Nov 16, 2022 at 7:28 PM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
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Max Baker
I like this. One of the things i like about the Elk sat antenna, versus the Arrow, is that it is flat and is easier to transport assembled. Having both 2 meter and 70 cm in the same plane makes this antenna equally mobile.
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M0PWX
The downside of them both in the same plane is that there is more interaction between the 2m and 70cm elements than if they were 90deg out of line
Peter M0PWX
From: Max Becker
I like this. One of the things i like about the Elk sat antenna, versus the Arrow, is that it is flat and is easier to transport assembled. Having both 2 meter and 70 cm in the same plane makes this antenna equally mobile.
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Max Baker
Yes, I agree. There are tradeoffs. There are a number of commercially available dual-banders that use a similar configuration with two independent yagis in the same plane, so it likely isn't a totally onerous design.
From: M0PWX Nov 17 #6902
The downside of them both in the same plane is that there is more interaction between the 2m and 70cm elements than if they were 90deg out of line
Peter M0PWX |
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Mike Hoblinski
Since the aluminum extrusion has slots on all for sides I suppose you could
rotate the 440 ellements 90 degrees. Keeping the same spacing for all elements you might have to reposition the 144 or 440 sets to avoid them running touching each other. Mike N6IMF |
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