INFEX 2018 – DX1ACE

The 2018 International Friendship Exchange (INFEX) and DX Contest took place on Feb 17th, 2018. DX1ACE participated from the National High School Dasmariñas.

OCF dipole for 40, 20 and 15 m on a 12 m fiberglass pole and commercial v-shaped multi band dipole
girl_scouts
Girl scouts having fun with the radio
Dasmariñas National High School

80/40/30 m Dipole

For the lower bands I am using a 40/80 m trap dipole. In order to become qrv on 30 m, I added a radiation coupled lambda/2 element for 30 m, using 10 cm spreader. After cutting the additional wire to the right length, the resonance on 30 m is exactly at 10.1 MHz. The additional element has no influence on the resonance for 40 and 80 m, but the impedance on 30 m is with 150 Ohm significant higher than 50 Ohm.

VSWR_30m
10.1 MHz Impedance (141 – j34) Ohm – VSWR 3
40m_VSWR
7.1 MHz Impedance (40 + j1) Ohm – VSWR 1.24
80m_VSWR
3.6 MHz Impedance (27 – j5) Ohm – VSWR 1.9

CQ WW DX SSB contest 2017

My first participation in this contest. Would have preferred the CW part, but we will not be here end of November. Decided to enter the classic, non-assisted, single operator class for 20 m band only.

Propagation conditions were not bad. 77 DXCC entities, 31 CQ zones and 411 contacts result in a raw score of 121 thousand. Quite satisfied with the result!

G5RV Measurements

After replacement of my 80/40 m trap dipole with the G5RV antenna, I made some measurements. The antenna has a height of 12 m at the center, and is hanging as an inverted V with both ends still 4 to 5 meter above ground. The symmetric feeder line is connected via a 1:1 balun to 12.9 m 50 Ohm coaxial cable.

Continue reading G5RV Measurements