Bill,
Don't forget, if the Q isn't high enough (and for sure it wont be on 160
meters), the bandwidth will be wider due to all the coil losses! This is
one of those things you have to think about twice!
73,
Joe, W1JR
At 02:16 PM 5/7/2003 -0700, Bill Turner wrote:
>On Wed, 07 May 2003 19:55:55 +0000, you wrote:
>
> >>A 160 meter mobile antenna is going to have a very narrow bandwidth so
> >>it may not be effective for BCB unless you are able to tune it
> >>somehow. 2:1 SWR bandwidth typically will be on the order of 20-30
> >>kHz.
> >
> >That's being very optimistic for such a short antenna. My 110' high 80m
> >(135' in length) dipole with open wire tuned feeders, using a balanced
> >link-coupled tuner wih split-stator cap, parallel fed, is more like +/- 8
> >kHz. I would expect an efficient 160m. mobile installation to be
> >essentially a single-channel affair.
>
>Perhaps that is optimistic. I'm going from memory of several years
>ago. It depends greatly on the Q you achieve with the loading coil.
>The point is, don't expect much in the way of bandwidth.
>
>--
>Bill, W7TI
>
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