I answered Rob's questions via direct email and then thought perhaps I
should be posting the response on the reflector. Hers is what I wrote:
----------------------------------------------------------------------
> > Is anyone using the Unadilla 80m traps to make a 160m
> antenna.
>
> Yes.
>
> >
> > If yes, which one do you have ?
> > There are 2 types; one for american 80m ssb band and
> one for the american 80m cw band.
>
> The 80m CW band version.
>
> >
> > I was wondering what sort of bandwidth these traps
> have. We do not have the same frequencies as you in Europe.
> >
>
> I ran a quick check this morning and found that the 2:1 bandwidth [for
> my particular setup] was 3500 kHz to 3700 kHz.
> The 1.5:1 bandwidth was 3500 kHz TO 3660 kHz.
>
> The 1:1 point is about 3550 kHz.
>
> The Unadilla 80m CW coil can be tuned [slightly] up in frequency by
> reducing the number of turns on the coil if one wished to do so. The
> coil itself is not potted but the capacitor is.
>
> Since only one coil is used in this setup and Unadilla will only sell
> pairs of coils you will have a spare if you wish to experiment.
> It might be that
> they would sell you one CW and one SSB 80m coil and then you could
> test things for yourself.
>
> I have the second coil sitting on the shelf but do not expect I will
> be using it.
>
>
> Tod, K0TO
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