купить sirio sy 4

Very good antenna I've used the same one for 11 years now its 28 foot over the ground and I have had QSOs all over the globe. They are well built for the money my yagi has stood up to very windy winters might buy another to stack them.

To get these antennas phased on 10 metres I used a simple 1/4 wave + 3/4 wave of really good 75 ohm coax ( Nevada WF-165 I recall 0.82 VF). The spacing was around 5.5M, practical and gave good gain, although the phasing harness was tight (with 1/4+3/4 the gamma matches must be on opposite sides).

These antennas work really well when modified for 10 metres. I ran a pair with the measurements shown on the polar diagram in the pictures section. They worked fantastically and matched the performance of Mike G3SED's 7 element Mono band yag on a 30ft boom.

Gain: 11 dBd, 13.15 dBi   (14dbi @ 60ft mounting)

Frequency range: 26.9-27.5 MHz (adjustable up to 29.00 MHz)

Made of aluminium alloy 6063 T-832 Electrical Data

Horizontal polarization Factory tuned at 11metre mid-band

Sirio SY-4The Sirio SY 27-4 is a very strong but lightweight, high gain quality, Yagi antenna that won't break the bank. It is well constructed and gives great performance on 26.9-27.5 MHz. The SY27-4 is easily adjusted to cover up to 29MHz in the 10 metre Amateur Band. ( See polar diagram under pictures for dimensions)Darren G0TSM ran a pair of these antennas on 28 MHz with outstanding results last solar maximum see review section for more info.