Balun impedance transformer – 43 mm length of RG402
20el 13cm DL6WU Yagi
The Peak VK2/SM-068 near Nimmitabel
WA5VJB 2.4 GHz 5el PCB Yagi
2.4 GHz 5el PCB yagi and a 2.4 GHz Big Wheel antenna
Feedline – 43 mm Half-wave length of RG402
2.4 GHz 5el PCB Yagi – driven element and directors
2.4 GHz PCB Yagi – Reflector element
Big Wheel Antenna
SG-Lab supplied 2.3 GHz HB9CV 4el Yagi – note the antenna resonant frequency is 2.3 GHz not 2.4 GHz. The VK band plan SSB call frequency is 2403.150 MHz. I adjusted the resonant frequency by trimming the active element track lengths.
2.3 GHz HB9CV 4el Yagi
Light coat of PCB enamel applied to the board and tracks. Track lengths trimmed to bring the resonant frequency to 2.4 GHz.
For resonance at 2.4 GHz, I trimmed 2mm off each side of the active elements. The parasitic directors are untouched.
50 mm RG402 extension to prevent capacitive reactance between the PCB antenna and transverter metal case
Published: 18 February 2018
Last Update: 19 February 2019
The purpose of this post is to share information with fellow radio amateurs, which demonstrates how you can achieve VHF-UHF Dx contacts with as little as 5 watts output on 144.200 MHz and 2.5 watts to 25 watts output on 1296.150 MHz.
Yes, you can also qualify a SOTA peak with a mono or dual band HT on 2m and 70cm. You can achieve greater distances with the use of an external antenna such as the 2m 4 element Yagi
This month’s activations include:
Mount Perisher VK2/SM-007
The Peak (Hudsons Peak) VK2/SM-068
Mount Taylor VK1/AC-037
1 April 2021 – Mount Perisher VK2/SM-007 QF43EO 2054 m ASL
Longest paths
2m 144.2 MHz SSB VK3BJM 366 km near Kyneton in Victoria (VK3)
23cm 1296 MHz SSB VK2DO 182 km, NSW South Coast
2m 144.2 MHz QSOs
2 April 2021 – VK1AD SOTA activation of Mount Perisher on 2m 144.2 MHz – Image courtesy of SOTA MAPS
23cm 1296.150 MHz QSOs
2 April 2021 – VK1AD SOTA activation of Mount Perisher on 23cm 1296.150 MHz – Image courtesy of SOTA MAPS
Extract – VK1AD SOTA activator log Mt Perisher 2 April 2021
Summit to Summit QSOs 2m and 23cm: VK1RX at Mt Ainslie VK1/AC-040 144 km and VK1FLEX at Mt Kosciuszko VK2/SM-001 12km, Australia’s highest mainland peak
1 April 2021 – Mount Taylor VK1/AC-037 QF43MP 850 m ASL
Longest paths
2m 144.2 MHz SSB VK2EMA 382 km at Tottenham NSW (VK2)
23cm 1296.150 MHz SSB VK1MA 60 km, near Yass NSW
2m 144.2 and 23cm 1296.150 MHz QSOs
18 April 2021 – VK1AD SOTA activation of Mount Taylor on 2m and 23cm bands to local stations – Image courtesy of SOTA MAPS18 April 2021 – VK1AD SOTA activation of Mount Taylor to 2m DX stations – Image courtesy of SOTA MAPS
Extract – VK1AD SOTA activator log Mt Taylor 18 April 2021
Summit to Summit QSOs – VK1DA/2 at Mt Canobolas VK2/CT-001 225 km and VK1MA at Mt Mundoonen VK2/ST-053 60 km.
VK1 SOTA on 1.2 and 2.4 GHz 
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