station antenna tunable from 27 to 30 Mhz. It is made of anti-corodal aluminium tubes and supplied with jointing sleeves of polythene to guarantee a perfect waterproofing. Strong and easy to install, it allows very good links. The new improved ground plane and a simple tuning table make the tuning easier and quicker

Features:

Base station antenna

Omnidirectional

High power handling capability

Whip equipped whit waterproof jointing sleeve

Made of aluminium alloy 6063 T-832

UP-GRADE: Tunable by whip length adjusting

Electrical Data

Type: 5/8 λ ground plane

Frequency range: tunable form 27 to 30 MHz

Impedance: 50Ω

Radiation (H-plane): 360° omnidirectional

Polarization: linear vertical

Gain: 1.2 dBd, 3.35 dBi

Bandwidth at SWR ≤ 2: ≥ 1300 KHz

SWR at res. freq.: ≤ 1.2 @ 27 MHz

Max. power: 1000 Watts (CW) continuous 3000 Watts (CW) short time

Feed system / position: Transformer DC-ground / base

Connector: UHF-female

Mechanical Data

Materials: Aluminium, Steel, Nylon

Wind load / resistance: 187 N at 150 Km/h / 130 Km/h

Wind surface: 0.16 m²

Height (approx.): 7230 mm

Weight (approx.): 2900 gr

Radial Length (approx.): 2000 mm

Mounting mast: Ø 35-42 mm

SIRIO CB/10 Meter Base Antenna Compairsion Chart -- by DNJ RadioModelFrequencyTypeGainMax PowerHeightRadial LengthThunder 2725 - 29 Mhz 1/4 λ2.15 dBi100 Watts(continous), 300 Watts(PEP)960mm / 3.14 ftN/AGPE 27 5/826.4 - 29 Mhz5/8 λ 3.35 dBi250 Watts(continous), 750 Watts(PEP)5950mm / 19.5 ft1320mm / 4.33 ftGPS 27 1/226.4 - 29 Mhz1/2 λ 2.15 dBi250 Watts(continous), 750 Watts(PEP)5950mm / 19.5 ftN/AStarduster M-400 26.5 - 30 MHz1/4 λ2.15 dBi1000 Watts(continous), 3000 Watts(PEP)5040mm / 16.5 ft2690mm / 8.82 ftNew Tornado 2727 - 30 Mhz5/8 λ3.35 dBi1000 Watts(continous), 3000 Watts(PEP)7230mm / 23.7 ft2000mm / 6.56 ftSirio 82726.4 - 28.4 Mhz5/8 λ 3.65 dBi1000 Watts(continous), 3000 Watts(PEP)6700mm / 21.9 ft1400mm / 4.59 ftSirio 201226.4 - 28.2 MHz5/8 λ 3.34 dBi1000 Watts(continous), 3000 Watts(PEP)6100mm / 20.3 ft1200 mm / 3.9 ftSirio 201626.4 - 28.2 MHz5/8 λ 3.45 dBi1000 Watts(continous), 3000 Watts(PEP)6100mm / 20.3 ft700mm / 2.39 ftVector 400027 - 28.5 MHz 3/4 λ 4.15 dBi1000 Watts(continous), 3000 Watts(PEP)8480mm / 27.8 ftN/ASD-Dipole 2726.5 - 30 MhzDipole2.15 dBi1000 Watts(continous), 3000 Watts(PEP)5582 mm / 18.3 ft3200 mm / 10.5 ftSY-3 Yagi26.5 - 30 Mhz3 element Yagi10.65 dBi1000 Watts(continous), 3000 Watts(PEP)Dimensions: 5942x2710x100 mm / 19.5 x 8.8 x 0.3 ftSY-4 Yagi26.5 - 30 Mhz4 element Yagi13.15 dBi1000 Watts(continous), 3000 Watts(PEP)Dimensions: 5846x4030x100 mm / 19.1 x 13.2 x 0.3 ftGain-Master25.5 - 30 MHz0.625 λ 1 to 2 dB higher500 Watts(continous), 1000 Watts(PEP)7360mm / 23.7 ftN/A

5Sirio Tornado 27 5/8 27 exl antennaon June 1, 2015Verified Purchaserecived this vert antenna last week ,but in that time I have worked many stations with it ,I hate to say this but it eats my 1/2 wave station master mk1 , the noise level is just so quiet can hear even the weakest stations out there , I have been also play with it on 17mtr with tuner I have worked the world on it , now the build what can I say I was very surprised and very happy with it apart from the screws thay are not stainless steel pitty but that\'s my only gripe , in my tests I left my old vert station master mk1 up in the air ,it is coming down so I can cut it up to use as a 17mtr mono band LOL , I give this Sirio Tornado antenna a massive thumbs up , tunes as per manuel ezy as , had it togeather in 20min ,

I may get one more for portable work . cheers tony zl1sw
5One of the best vertical antennas I owned you can get a almost ...on January 22, 2015Verified PurchaseOne of the best vertical antennas I owned you can get a almost perfect 1:1 match with the adjustable tip, very good construction all heavy duty parts I use it on 10 meters and it also has a low swr on 20 meters but I do use it also on 12,15 & 17 with a antenna tuner. I would highly recommend this antenna. One thing I must point out be sure you have enough room for the ground radials they are quite long.527-30 Mhz CB Base Antennaon November 11, 2014Verified PurchaseThis a very well made antenna I use mine on 11 meters and 10 meters and love it.I only have it up about 25 feet and I can talk all over the place with it.I don\'t need to go up any more with this antenna.I am very happy I got this one.1 of 1 people found the following review helpful5Nice. Worked like a dreamon October 5, 2014Verified PurchaseNice. Worked like a dream. 30 minutes to put together. SWR 1, right out of the box following the supplied tuning table instructions. I would recommend this product to others. Well worth the price.1 of 1 people found the following review helpful5Good antennaon August 16, 2014The antenna works very well thats why i give it five stars. I however was disappointed with the packaging because there was some damages to two section which i had to repair.2 of 2 people found the following review helpful5Very nice antennaon June 6, 2014Verified PurchaseI bought this antenna to use on 10 meters. Assembly was very straightforward. I adjusted the antenna to have the lowest SWR at 28.500 MHz by the chart in the instructions and that was right on when I got it in the air. It looks to be built really well. I recommend it.1 of 1 people found the following review helpful5Antenna works great!on May 31, 2014Verified PurchaseEasy to install and adjust.
Directions are easy to follow.
However, it helped to convert the mm to inches to preset the antenna.7 of 7 people found the following review helpful5Good producton March 4, 2014Verified PurchaseThe antenna met my needs in every way. It was easy to assemble and made of high quality materials.It has great transmit and receive.Be sure to put thread locker on all set screws and snug them down.6 of 6 people found the following review helpful5Blows away every other antenna in performance and price!on December 3, 2013Verified PurchaseSuper easy to assemble, exact measurements in instructions, tuned perfectly 1.15 SWR across 40 channels, very low level of static and unbelievable transmit and receive! Beats every other vertical antenna I\'ve tried in almost 30 years in the hobby!

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