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upload: 2013-11-22

SOTA

Yagi    created July 2013 by OE7OPJ
 

      Homemade, lightweight, cheap & weather-resistant
5 Element
VHF Yagi for horizontal & vertical operation (706 g)
               Boom 145 cm long - Gain 7,8 dBd (PWR x 6)

                                     + 3 m Mast Landing Net Handle (380 g) = 1086 g

  
5 Element SOTA Yagi for VHF - made by OE7OPJ 2013


Mast 3 Sections Landing Net Handle = 3 m (380 g) by Falle Camping in Villach 20 Euro & Clips

3 m Landing Net Handle (GFK)

Boom assembling

Boom assembling

Boom assembling


The VHF SOTA Yagi was calculated by VK5DJ Yagi Calculator, Balun design by DK7ZB.

Horizontal or vertical (hot driver up!) operation by simple ratation of the boom.

Design of the SOTA 5 Element VHF Yagi - OE7OPJ - 2013

Make the Driver Holder from Brass & Makrolon:

Driver Holder

Driver Holder

Driver Holder


Make the Koaxcable RG-58 (136 cm) for the Balun:

Koax to Driver

Koax to Driver

Koax to Driver

Koax from Balun


Make the Driver / Dipole from M4 Brass, GFK Fiberglass 3,9 mm & 3M Copperfoil:

Driver

Driver

Driver


Mount the Driver-Holder and make the Koaxbalun:

Driver-Holder Makrolon & GFK pole

Driver-Holder Makrolon & GFK pole

Driver-Holder Makrolon & GFK pole

Driver-Holder Brass & Koax

SOTA VHF Yagi by OE7OPJ

Driver / Dipole of SOTA Yagi

Driver Ends

miniVNA Measurement of the SOTA Yagi

after SWR-Measurement protect the Driver by shrink tubing:

Driver / Dipole


Put the Elements inside the 145 cm Boom for Transportation and make Boom-Caps:

Elements

Elements

Elements

Boom with Balun

Boom-Caps:

Boomcap - 1/2 Polokal HT-Muffe

Boomcap - 1/2 Polokal HT-Muffe

145 cm Boom with Boom-Caps

145 cm Boom with Balun


If necessary weatherprotect the Kable & BNC by a flexible FX Pipe upside the Boom.

RG-58 cable & BNCs

flexible FX Pipe for weatherprotection


Success by building and good DX !







73 de Peter OE7OPJ/P from Lienz - Austria
 

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