Re: [amsat-bb] "Trash Can" dish antennas

[Bob Bruninga <bruninga@xxxxxxxx>]

They are called OE-82's and they are for UHF-Satcom.  Uplinks in the
300 MHz range and downlinks in the 250 MHz range.

de WB4APR, BOb

On Mon, 3 Dec 2001 RMckni8527@aol.com wrote:

> Most larger Navy and USCG ships have "trash can" antennas mounted on the
> flying bridge.  The best way for me to describe them would be to take a metal
> trash can, cut half of the top off, and mount the parabola in the bottom with
> the feed in the open end.  This in effect is like wrapping a "fence" around
> the outside edge of a normal circular dish.  Does this serve to eliminate
> background noise from over illumination of the dish, so the feed only sees
> signals from the front of the focal point?
>
> I don't know the official nomenclature of these antennas, but they're about
> 4-5 ft in diameter, painted Navy gray, have gyro stabilized tracking, and are
> always seen in pairs one port, one stbd on the flying bridge.  Not sure what
> they're used for.  They do actually look like a trash can, or maybe more
> closely resemble a tub used for icing down a beer keg.
>
> What are the implications for a dish used on our satellite freqs?  Beneficial
> to explore a similar design?
>
> 73's
> Ray - WB3ABN
> Kingston, WA
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de WB4APR@amsat.org, Bob

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