Topband: Inverted L improvements - Part 3 (now with data)

[Jeff Blaine]

Disconnect the other antenna.  Let it float.

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com

On 23-Jan-19 6:02 PM, Todd Goins wrote:
> Okay, after many requests, on and off list, I disconnected the 43' T 160m
> antenna at its feed point and for good measure I disconnected the coax
> feedline from the system too.
>
> It made a pretty substantial difference in the measurements. The 1.5 SWR
> range is now only about 35 kHz wide but the 2.0 SWR range is still 100 kHz
> which is probably still too wide.
>
> Freq  SWR  R    X     Z
> 1800 1.9 31.8  -18.6 36.8
> 1810 1.7 32.5  -14.1 35.4
> 1820 1.6 33.3  -9.6  34.7
> 1830 1.5 33.9  -5.3  34.3
> 1840 1.45 34.6  -0.7  34.6
> 1850 1.43 35.5  3.9  35.7
> 1860 1.47 36.1  9.0  37.2
> 1870 1.6 37.0  13.9  39.5
> 1880 1.7 37.8  18.9  42.3
> 1890 1.8 38.8  24.0  45.6
> 1900 2 39.9  29.5  49.6
> 1910 2.2 41.1  34.5  53.7
> 1920 2.4 42.6  40.5  58.8
> 1940 2.8 44.7  51.4  68.1
> 1960 3.4 47.6  63.0  78.9
>
> I'll test it on the air tonight (using FT-8 and the RBN) with the 43'
> antenna disconnected. Perhaps it will be better? The numbers look better,
> right?
>
> Should I ground the 43' antenna instead of leaving it floating?
>
> Thanks guys.
> 73,
> Todd - NR7RR
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
>