On 4/20/2011 11:26 AM, Mike Fatchett W0MU wrote:
> In theory then you should be able to get a decent swr for both bands. I
> don't really care about the bandwidth too much as they will be used for
> CW in a contest.
An 80/40 fan will work VERY well for the bandwidths you need, and
without a tuner if you tweak it carefully.
160/80 is tougher -- 160 CW goes up to 1900 kHz in contests, which is
nearly 6% bandwidth, tough for any dipole. The CW band on 80 is about
3% bandwidth, also a stretch for the higher frequency fan element. You
can make this work with RG8/RG213 that has low DCR, and thus low loss,
but you WILL need a good antenna tuner.
73, Jim K9YC
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