Honest Bob's Maple Leaf Communications
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Maple Leaf Communications
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We have tables at most of the hamfests in southern Ontario. Come check us out!

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Our sister company, Paladin RF, offers a line of high-quality duplexers and filters. Their small size, and especially their small prices, will probably surprise you but they are innovative, no-compromise, top-performing products. Check us out!

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Check out our fun page for free stuff! Calculate various antenna dimensions, determine best height above the ground, look up coaxial cable properties, check the ideal stripping dimensions for mounting various connectors, and more.

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Calculator - 3-Element Yagi

Use At Your Own Risk

Maple Leaf Communications assumes no responsibility for material calculation errors or other deficiencies in the calculator offered here.

Installed antennas can be affected by buildings, trees, mast properties, other antennas, ground conditions, and more.

Dimensions reported by this calculator should be considered only approximations of the length(s) of material required.

When ordering materials and building your antenna, allow a little extra length and trim as necessary instead of building and installing the antenna before discovering that it is too short.

3-Element Yagi

For people who can get them high enough, and have a method for rotating them, Yagi-Uda antennas are among the best choices for DX work. Their directional selectivity and high gain mean quieter received signals, and stronger transmitted signals, than many other antenna options.

PLEASE NOTE: the warnings above are especially true for this calculator. Yagi-Uda design dimensions can vary significantly with differences in element diameter, boom material, element-to-boom attachment method, and other factors that are ignored by this simple calculator.

The calculator creates equal spacing between the elements, which achieves a balance between good bandwidth performance and a decent 50-Ohm match. Experimenters might want to try varying the spacing (especially between driven element and director) and adding a matching system to achieve different results.


Enter the centre frequency in Mhz



Director Element

Total Length:    or  or 
Centre Point:    or  or 

Driven Element

Total Length:    or  or 
Centre Point:    or  or 

Reflector Element

Total Length:    or  or 
Centre Point:    or  or 

Minimum Boom Length (add extra if endcaps required)

Total Length:    or  or 
Centre Point:    or  or 

Element Spacing

Between
Each Element:   or  or 

Turning Radius

Radius Length:   or  or 

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Tram 1154 magnetic mount and 3dB 5/8-wave antenna all in one, 15 feet coax and PL259 connector

Only $39.95!

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We've got another load of fiberglass poles in stock. Ask about our new 9-packs. Details coming soon.

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Deal Item Price
NMO mount
with coax
$5.00
Motorola UHF Antenna (NMO) $20.00
Tap light for
unwired dark spots
50 cents
Various night lights 50 cents
8" velcro straps (5 pieces) $2.00
Alligator test leads, 12" long (5 pieces) $3.00
8" long Black cable ties $0.10 each
Roll of double sided foam tape $2.00

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