RA3DUF, hanged our antenna on the nearest pines. TNX to Yuri,
RK3DUF for steeplejack works!
can see a photo of the antenna (antenna colored by red). The antenna
had no feeder and was connected directly to a transceiver FT-847
through a home- made T- ATU that was placed at the table.
used an automobile accumulator 55-A/h and gas- generator Honda
for feeding our equipment.
was very bad - a pipe in diameter of ½” and in length of
1 meter. The ground was very damp, ten meters father from the
antenna a river was. The antenna was hanged between two high pines.
we have had:
1. 40 meters - is higher
than any praises. Really, we ruled by pile- up from tens calling
stations. Simultaneously we received as local as DX- stations.
2. 20 meters – the directivity of the antenna
did bad effect for us. The
antenna was directed to
the North - South, that it was
not good for us. Southern radio stations simply rattled
in the Air!
15 meters- Japanese called
us very loudly.
On 10 meters was dead (no propagation).
80 meters – we received very loudly many radio station from Siberia
(2000- 3000 kms from us) but our sign was received poor in Siberia
because, as we think, of
given diagram directivity for the antenna obtained with help of
free antenna program MMANA (MININEC based). Left diagram is a
section of the volumetric diagram directivity of plane X-Y at
a zenith corner of the maximum radiation. The right diagram is
section of the volumetric diagram directivity of plane X- Z. Also
at the right down corner of the pictures is a table with antenna
impedance. Please, take attention to the data, you can do decision
how you ATU does match of the
Igor Grigor'ev, RV3DA
our first workplace looked. As usual, we had too little time for
preparing before our pedition, so, we
used “table” T-ATU. Two air variable capacitors and a variable
inductor placed on the table without any case. Yury, RK3DUF, did