JI1FGX/DU9 Mindanao, Philippines Amateur Radio Diary IOTA OC-130
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Introduction. [Lily Diary]
Diary of Life in Mindanao

25/06/08  AutoCWType_Ver1.4.1
25/06/07  Introducing the Shack
25/06/06  A portrait illustrated by ChatGPT
25/05/26 Windows full-width half-width switching
25/05/17 OK2ZAW BCD to 16 converter
25/05/16 For 3.5MHz zepp antennas
Stepping motor this and that
25/05/15 3.5MHz stepping motor plan
25/05/14 3.5MHz tuning coil installed
25/05/11 3.5MHz antenna installation completed
25/05/03 JTDX automatic operation program Ver0.4.3
25/04/26 Drone Habsan ZINO
25/04/25 Time setting Ver0.3
25/04/24 AutoCWType_Ver1.3
25/04/23 FTDX3000 LCD repair preparation
25/04/22 Installation plan for 3.5 MHz Twep antenna
25/04/21 AutoCWType_Ver1.1
25/04/20 10,14MHz antenna installation completed
25/04/19 JTDX automatic operation program Ver0.4.1
25/04/19 Antenna pole installation at 14 MHz
25/04/18 ThinkPad X390 repair completed
25/04/17 Search is now available.
25/04/15 Preparation of 10 MHz dipole
25/04/12 Hexbeam Part8
25/04/06 ThinkPad X390 is broken.
25/04/05 Time Setting Program
25/03/31 JTDX Automatic Operation Program
25/03/30 Automatic log sending from CWType to Hamlog
25/03/21 Hexbeam Part7
25/03/20 FreeDV Part3 First QSO
25/03/18 FreeDV Part2 QSO in shack
25/03/16 Hexbeam Part6
25/03/15 FreeDV Part1 installation
25/03/09 Hexbeam Part5
25/03/07 Hexbeam Part4
25/03/05 28MHz antenna modification
25/03/01 FTDX3000 is broken!
25/02/28 Pile up at 50MHz FT8
25/02/28 DXV500ZS linear amplifier repair
25/02/27 Pipe and rebuild plan for tower
25/02/26 Direction of Japan from Ozamiz
25/02/26 28MHz does not fly.
25/02/23 DXV500ZS linear amplifier repair
25/02/22 Hexbeam Part3
25/02/21 Hexbeam Part2
25/02/18 28MHz antenna construction
25/02/17 18,24MHz antenna height construction
25/02/16 Z26NS Cosovo
25/02/14 21MHz FT8
25/02/12 Antenna repair at 7,21 MHz
25/02/08 CW operation at 21MHz
25/02/05 DXV500ZS linear amplifier failure
25/01/19 Input Director
25/01/14 Temporary License Renewal
Samway DXV500ZS linear amplifier repair (2025/02/28) 
 February 05, 2025andFebruary 23, 2025I wrote in my diary of
I had parts sent from Japan to replace them, but they wouldn't turn on.
So I consulted with him further, and he said that the FET was most likely short-circuiting.
Samway DXV500ZS
Board with power FETs
With 6 FETs C2M0160120
I had to use a soldering iron to melt the solder on the legs one by one, and pull the legs off the board with radio pliers.
I checked with a tester and found a short circuit between the gate and the source.
The cost of 6 units at 1580 yen each is 9480 yen plus the EMS shipping cost, which is a painful expense.
It is sold at Shopee, a mail order store in the Philippines, but it is rather expensive at 805 pesos (about 2,150 yen) per piece.
I will be purchasing from Samway.
February 27, 2024   February 28, 2025