JI1FGX/DU9 Mindanao, Philippines Amateur Radio Diary IOTA OC-130
English Japanese



Access until yesterday
Introduction. 【【Lily Diary]
Diary of Life in Mindanao

24/12/11 CVS conversion software for DXCC listings
24/12/05 Aggregation by country from JTDX
24/12/02 ADIF for one month from JTDX
Programs that create files
24/11/24 CwGet and CwType settings
24/11/24 WWDX Contest
24/11/21 CQ Ham Radio
24/11/20 Call Sign Assignment IOTA Number
24/11/13 IOTA 100 Awards Arrival
24/11/12 LoTW WAZ and DXCC
24/11/04 PLDT Optical Internet
24/10/30 Pile-up of 50MHz FT8
24/10/28 Camiguin Is Crowdfunding
24/10/26 50MHz Yagi feeder
24/10/21 RTTY with MMTTY
24/10/19 Firmware for UV-5K
24/10/17 Antenna group seen by drone
24/10/16 7MHz Antenna Pole
24/10/15 3.5MHz zepp transceiver antenna
24/10/14 Hexbeam Purchase Plan
24/10/13 24MHz dipole addition
24/10/13 50MHz Yagi repair completed
50MHz FT8 first pile
24/10/12 Antenna production for 24 MHz
24/10/09 Trouble with Gmail
24/10/09 The Shack
24/10/07 JO1CRA/7 AS-206
24/10/05 3D2V Rotuma Island IOC-060
24/10/01 Camiguin Island Trailer Video
24/09/30 Uruguay
24/09/29 50MHz antenna installation
24/09/25 Pile up on the caller's side
24/09/19 IOTA 100 Award
24/09/18 IOTA Application
24/09/12 DXCC Application
24/09/11 FT8 in communication with KH8T
24/09/08 50MHz Yagi Antenna
24/08/28 Pile up at FT8
24/08/07 Pile up from FT8EU
24/07/19 JW/WE9G in Svalbard
24/06/27 Purchase of air conditioner for wireless room
24/05/28 antenna switch
24/05/27 MFJ-259B Repair
24/05/10 Completed 3-band antenna
24/05/03 7MHz Dipole
24/04/30 7MHz Domestic
24/04/29 Reopening Project
24/04/04 Repair of FTDX3000
24/03/21 To NTC Cagayan
Added 24MHz dipole (2024/10/13)
Installed a 24MHz Dipole Antenna (October 13, 2024)
"24/10/12 Making a 24MHz antennaWe actually attached the antenna we made to the tower and adjusted the SWR.
It is called the fan-out type.
This is a fan-out type antenna that adds 24MHz to the same feed point as the existing 18MHz element.
We performed impromptu adjustments using only NanoVNA, without using MMANA.

First, adjust the length and angle of the 24MHz element.
The math is 300/24.915/4*0.95=2m86mIt should be like this,
When you actually adjust the length while measuring with NanoVNA,2m53cmIt has become.
The elements are spaced 2m apart.

Next, fine-tune the element length to 18MHz.
300/18.100/4*0.95=3m94cmHowever, the actual measured value of the element is3m70cmIt was.

By the way, the height of the tower is21mH
At the top 18mH 50MHz 5 element Yagi
Also at 18mH 7, 21, 81MHz fan-out dipole
At 16mH 10,14MHz fanout dipole
At 14mH 18,24MHz fanout dipole

It is attached at
.
Measurement results using NanoVNA
There are two bands, 18MHz and 24MHz, with minimum SWR.
When I measured it with NanoVNA, the minimum SWR was 1.36 at 18.160MHz.
The band is almost flat
After measuring with the NanoVNA,
I found the minimum SWR at 18.160MHz, which is 1.36.
The SWR is almost flat across the band.
When I measured it with NanoVNA, the minimum SWR was 1.16 at 24.890MHz.
This one is also almost flat inside the band.
After measuring with the NanoVNA,
I found the minimum SWR at 24.890MHz, which is 1.16.
The SWR is almost flat across the band as well.
The tropical Philippines is home to the island of Mindanao, which is located at the southernmost point at 8 degrees north latitude.
Repairing the 50 MHz antenna and adjusting the 18 and 24 MHz antennas began at 6:00 a.m. and took until 2:00 p.m.
The sun shines directly from above and makes your skin sting.
After adjusting the element, I returned to the shack where the air conditioner was working and checked the NanoVNA values. Then I worked outside again.
I drank water many times along the way, but I started to feel dizzy.
I had lunch and then started working on the rest without taking a break.
It was 2pm when I finished everything. I immediately went to 7-Eleven and bought a Pocari Sweat.
A 2L bottle of Pocari Sweat costs 165 pesos (445 yen).
October 13, 2024   October 14, 2024