>
>I am at my wits end with the following problem, and would appreciate any
>advice (e-mail direct to me) that might help me out of this dilemma.
>
>My antenna is a wire in the attic, 40 feet along the peak, 10 feet
>drooping off each end, one tossed toward the east and the other west.
>It's fed with a single wire feeder coming down through a hole in the
>closet ceiling into the bedroom where an MFJ 945C tuner connects it to a
>TenTec Century 21 and HW-8 The point at which the feeder is attached was
>determined by convenience, not formula. On 80, 40, 20 and 15 the SWR is
>down to 1.1:1, tuning is broad, and the whole arrangement gets out
>surprisingly well.
>
>I am now trying to use this antenna on 30 meters with my new TenTec QRP
>kit and I can't get the SWR any lower than 3.8:1, using an external Autek
>WM1 SWR/POWER meter. Unlike the other bands, the feed point on 30 is very
>high impedance/inductive reactance.
>
>Here are some numbers read by removing the single wire feeder and ground
>from the MFJ tuner and attaching them to an Autek RF1 Analyzer. They
>clearly show the problem, and I would very much appreciate any ideas that
>you think might improve the situation.
>
> 3.560 Mhz Z=186 ohms Inductive L=8.1 microH
> 7.040 Mhz Z= 628 ohms Capacitive C=31 pF
> 10.11 Mhz Z=1351 ohms Inductive L= Off scale, meter reads to 300 microH
> 14.06 Mhz Z=325 ohms Inductive L=3 microH
> 21.06 Mhz Z= 183 ohms Inductive L=1.15 microH
>
>Thanks and 72! Bill K3AS Delaware
>
>
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