Copyright (C) 1997-2025 "Uchimura"
All rights reserved
japanese



Title



welcome


( Final renewal day of the data is March 13, 2025)


JA6HIC Toshizumi Uchimura


Greeting

I start amateur radio and become for more than 35 years(since1967). I am making a transceiver and antenna and easy measuring device etc. with self oneself. And I am enjoying amateur radio with the radio equipment that I made with self oneself.

Also, recent operates the personal computer and became possible to connect to the Internet. I made this homepage, to introduce the radio equipment that I myself made at the opportunity of this.

Representative homemade equipment

The work that I introduce with this homepage is a transceiver, antenna, easy measuring device.
The photograph of under is the HFSSB transceiver (NO5 machine), antenna (ZLspecial), the frequency counter, that at present are using it. Needless to say I myself made all these devices.

*Click on the screen below to go to each page

Antenna
..Renewed ZL Special Antenna(Final renewal (March 13, 2025)
  • Introducing the renewed 21MHZ 2EL ZL special antenna
..ZL Special (Final renewal ( November 5, 2021)
  • Introduction about the reconstruction method to 2EL and also 3EL for 21MHZ
..50MHz 3EL ZL Special(Final renewal ( June 24, 2023)
  • Introducing the 50MHz 3EL ZL special antenna

Transceiver

..NO5 machine (Final renewal May 1, 2003)
  • The use of ladder type Xtal filter of 15MHZ (For 21MHZ)
..NO4 machine (Yet only the Japanese explanation)
  • 9MHZ Xtalfilter use that is marketed(For 21MHZ)
..NO3 machine (Final renewal December 19, 2001)
  • Portable transceiver for 21MHZ
..NO2 machine (Yet only the Japanese explanation)
  • Portable transceiver for 7MHZ
..NO1 machine(Yet only the Japanese explanation)
  • remodel the PLL unit for the CB radio machine and use (For 21MHZ)
..NO6 machine (Final renewal Jun 6, 2000)
  • At present transceiver for production intermediate (For 21MHZ)

Measuring device

..The frequency counter (Final renewal (February 17, 2023
  • Introduction of the LED 8digit display frequency counter
..The dip meter (Final renewal January 26, 1998) <
  • Introduction of dip meter of liquid crystal display counter inclusion
..SWR meter for QRP (Final renewal (January 13, 2023)
  • Introduction of the SWR meter for small power measurement
..Condenser capacity meter (Yet only the Japanese explanation)
  • Introduction of the condenser capacity measuring device
..Adjustment back-up instrument (Final renewal (October 1, 1998)
  • Introduction of a simple adjustment back-up instrument

"QRP"DX contact relation
..21MHZ DX condition information (Yet only the Japanese explanation)
  • Introduction about the propagation situation of DX
..A recent"QRP"DX contact achievement (4) (Yet only the Japanese explanation)
  • Introduction of the DX contact achievement by recent QRP
..A recent"QRP"DX contact achievement (3) (Yet only the Japanese explanation)
  • Introduction of the DX contact achievement by recent QRP
..A recent"QRP"DX contact achievement (2) (Yet only the Japanese explanation)
  • Introduction of the DX contact achievement by recent QRP
..A recent"QRP"DX contact achievement (1) (Yet only the Japanese explanation)
  • Introduction of the DX contact achievement by recent QRP
..DX contact achievement by QRP (Final renewal Oct 30, 2001)
  • Introduction of the achievement of the DX contact by QRP in the past
Other
..Stamp of the beautiful world (Final renewal Jan 20, 2004)
  • Introduction of the stamp of the beautiful world
..Radios I made a long time ago, etc. (Final renewal April 5, 1998)
  • Introduction of the vacuum tube style transceiver