A270-10S Cushcraft 2m/70cm 5 el Yagi
* Frequency 144-148MHz, 430-450MHz * Elements 5 ea. band * Power 350W *
Forward Gain10dB * Front-to-back 20, 18dBi * SWR (typ) 1.2:1 * Bandwidth
4MHz, 10MHz * Boom length 1.9m * Longest element 102.4cm * Turning radius
1.8m * Mast Size 32-51mm * Wind load 0.07 * Weight 0.81kg
This antenna can be mounted in either vertical or horizontal polarisation.
It is perfect where space is tight and dual-band operation is required. The
harmonic relationship of 2m and 70cm allows clean radiation patterns with
minimal interaction.


if i can dose it want to be mounted vertical or horizontal polarisation

With a couple of caveats, yes, you can use it for satellite work.

1. Rear mount it, don't shoot through a metal mast.

2. Polarization: for LEOs won't matter (Low Earth Orbit). Since there aren't
any HEOs right now, do whatever might give you dual use, e.g., if you want
to work the occasional SSB contact then mount them for horizontal
polarization. If, on the other hand, you want some increased FM repeater
coverage, mount them for vertical polarization. As far as the LEOs go,
polarization won't be a real factor.

3. Chances are neither antenna comes even close to claimed gain. It won't
matter for the LEO, they are good enough.

Some of the best fun you can currently have on satellites would be
dramatically improved with a 2m preamp. Do yourself a favor and mount it out
at the antenna, not after 2 or 3 dB of feedline loss in front of it. The
mode B VUSAT works really well. Lots of fun to be had on it. ISS also works
well (International Space Station). Old AO-7 still works (after being on an
extended vacation for a decade or so) nicely on mode B, WHEN IT IS IN
SUNLIGHT (batteries are shot)).

Any bird that you work that has a 70cm downlink (your received side) will
require a preamp unless you have no feedline loss at all.

In summary, the antenna will work. Make sure to keep your feedline losses as
low as possible. Nothing less than LMR-400 will do if you have any
significant length of run to the antennas from the shack. (25' or more).
Preamps at the antenna will make a night and day difference. They are the
SINGLE thing you can do that will give the biggest bang for the buck. I
recommend the SSB Electronics preamps as they are rugged, well built and
well protected.

Have fun.

My sat setup:

2m/70cm nested quads (5el-2m/8 el-70cm), vertical polarization, mast mounted
gasfet preamps
70cm 14.2 dBc circlularly polarized (RHC) crossed yagi M2
2m Egg Beater
3' parabolic dish for 2.4 gig, antenna mounted LNA down-converter.
All antennas fed with 80' of LMR-400.
AZ/EL rotors: G-800 AZ, Yaesu Elevation Rotor.

73,

....hasan, N0AN

"DAVID BROWNE" wrote in message
...
A270-10S Cushcraft 2m/70cm 5 el Yagi
* Frequency 144-148MHz, 430-450MHz * Elements 5 ea. band * Power 350W *
Forward Gain10dB * Front-to-back 20, 18dBi * SWR (typ) 1.2:1 * Bandwidth
4MHz, 10MHz * Boom length 1.9m * Longest element 102.4cm * Turning
radius
1.8m * Mast Size 32-51mm * Wind load 0.07 * Weight 0.81kg
This antenna can be mounted in either vertical or horizontal polarisation.
It is perfect where space is tight and dual-band operation is required.
The harmonic relationship of 2m and 70cm allows clean radiation patterns
with minimal interaction.


if i can dose it want to be mounted vertical or horizontal polarisation