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 1/2 inch 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.
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 poor grounding.
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 DX- QSO.