Biography

Thank you for visiting my QRZCQ page.
I live on the 12th floor of an apartment building. I'd like to share with you how I enjoy amateur radio under these restricted circumstances.
I obtained a basic amateur radio license when I was in high school (1973) and started a station, but it was closed for many years after that.I restarted my amateur radio station at my current address in April 2023.
I mainly operate on the HF band, but since I live in an apartment, I operate with limited antennas type and radio output. I started operating FT8 in March 2025. With FT8, even in my radio environment, I can obtain radio performance comparable to that of radio stations that operate high-power beam antennas.By operating FT8, we were able to dramatically expand the communication range and greatly increase the number of stations we could communicate with.
My shack is on the 12th floor of an apartment building and is about 30m (100ft) above ground. The antennas are installed on the north balcony and can transmit radio waves up to HF, VHF, UHF, and SHF (3.5MHz to 1200MHz).

Worked DXCCs:

Equipment

１．Shack
My shack is on the 12th floor of an apartment building and is about 30m (100ft) above ground. The antennas are installed on the north balcony and can transmit radio waves up to HF, VHF, UHF, and SHF (3.5MHz to 1200MHz).
Because the room is small, I have ingeniously installed radio equipment and other equipment
within a width of 1m(39-inch). The desk is also foldable, so that it is placed in front of the radios only when in operation.
There radios and power supply are stored in a homemade vertical wooden 42cm(16.5-inch) rack, and three
monitors are fixed to an arm and installed vertically. This allows amateur radio operation in a shack that is 1m(39-inch) wide.

２．Rig
HF : IC-7300M (50W), TS-670 (10W, spare)
mode: SSB, FT8, FM
V/U/SHF　 : IC-9700 (50W, 10W)
SDR (PC) : RSP1a

３．Antennas
The horizontal loop antennas are deployed outside the balcony during radio operation, and stored inside　the balcony otherwise. Two 3.5m(11.5ft) long fiberglass fishing rods are extended parallel to each other from the balcony, and a 20m(65.6ft) and 13m(42.6ft) long antennas wire are formed into a horizontal square loop. A mechanism was designed to rotate the fiberglass fishing rods and store them inside the balcony when not in use. The other antennas are also installed inside the balcony. They are operated in a way that does not cause discomfort to nearby residents.
The transmission and reception direction of the antennas on the north balcony is between north-northwest and east, so it covers Europe and North and South America. Africa, the Middle East Asia, and Oceania are in the shadow of the apartment building. Using PSKReporter or GridTracker, you can easily see the influence of the apartment building.

３．1　Currently installed antennas
(1)HF : Tow Horizontal square loop antennas
①Main band 14Mhz (20m=4m x 3.5m + Trap)(65.6ft = 13.1ft x11.5ft)
②Main band 21Mhz (13m=4m x 2.5m ) (42.6ft = 13.1ft x 8.2ft)
①、② → Antenna selector + Balun + ATU (AH-730)
① and ② are 7MHz to 28MHz respectively, and the SWR is within 2 depending on the ATU.

(2)V/U/SHF : Whip antenna (SG9500)

(3)Receive only : D303 0.5Mhz-200MHz

３．２　Previously installed antennas
Antennes that can be removed from the mounting base
（1）Screwdriver Antenna
　　　Diamond -ant. : SD330
（2）5m Rod element with ATU
　Radix-ant. : AW-M01/500

４．Operations & Log management
I create a large number of communication logs efficiently using the automatic upload function.　The log data is automatically uploaded to each logging app as soon as I finish communicating.　This system allows each Log Soft to be confirmed within minutes.
Log4OM2 is a powerful and modern logging software designed for amateur radio operators. It offers advanced station management features including CAT control, cluster integration, digital mode support, award tracking, QSL management, and real-time log synchronization with services like LoTW, eQSL, and Club Log. With a user-friendly interface and multilingual support, Log4OM2 provides an efficient platform for both casual QSOs and serious contesting.

４．１　Log data automatic linkage diagram】

WSJT-X
↓ UDP
JT Alert２
↓ UDP
①Log4OM2 ⇨ ②QRZ.com ③eQSLcc ④ClubLog ⑤HAMQTH
↓ UDP Web (automatically upload ①～⑦)
JT_Linker ⇨ ⑥LoTW →（ADIF upload)⑧QRZCQ
↓ UPD
⑦Turbo HAMLOG　

（１）FT8
After communication ends, it will be automatically uploaded to all logs from ① to ⑦.
（２）Phone
After I finish communication, when I key in the log data into ①Log4OM2, it is automatically
uploaded to the Log apps ② to ⑦.
（３）Local Phone
After the communication is completed, I key in the log data into Log ⑦.


４．２　Display contents on three monitors
Three monitors are mounted on a bar next to a vertical wooden rack. The following information is displayed on the three monitors:

（１）Top Monitor : Contact Infomation ＆ Log Management
①Log4OM2：Main logging software on the PC
　　・Integrated logging and station management software
②TurboHAMLOG：Sub-logging software on the PC
　　・Lightweight and flexible logging program supporting various digital and voice modes.
③JT-Linker：Log information relay software
　　・Utility connecting Log4OM2 with logging software for automated QSO recording.
④UTC＆JTC：Universal Time and Japan Standard Time

（２）Middle monitor ： Digtal Mode Operate
①WSJT-X：Software for weak-signal digital modes like FT8, JT65, and WSPR in amateur radio.
②JTAlertV2：Alerts, logging, and award tracking tool for WSJT-X operators.

（３）Lower monitor ：Propagation Conditions
①PSK Reporter：Web-based system mapping where your digital signals are received worldwide.
②GRID Tracker2：Tracks and maps QSOs by Maidenhead grid squares for awards and progress.