At 02:28 PM 6/20/2005, Mike Morris WA6ILQ wrote:
>At 07:34 AM 6/20/05, you wrote:
>
> >Other than the fiberglass sticks, what options are available to me in
> >multiband antennas?
> >At the outset, we will be putting up 2M and 440, and we are
> >contemplating a 902 system.
> >Of course I'd rather have one site on the tower, and one feedline if
> >practical, but I'm leery of excessive losses.
>
>All multiband antennas are a compromise - even using an
>18" whip on a vehicle as a 2m and as a 3/4 wave 440mhz
>(the compromise there is the pattern).
>
>If you have tower space for multiple antennas, would you
>entertain that plus a diplexer that would let you share the
>feedline? If so, TXRX makes decent tower-top diplexers,
>or you can make your own like a local here did... one
>main weak spot is the pigtails, use good quality chassis
>mount connectors on a rigid weatherproof and RF-tight box.
If the loss isn't too bad, that's an option.
OTOH, feedline, at least in the form of 75 ohm hardline, is pretty
cheap, and very low loss.
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