tk120 is open source software designed for the Yaesu VR-120 and VR-120D receivers. Though tk120 is intended chiefly for Linux, MacOS X, and BSD users, it will work on Microsoft Windows (95 and later), too.
An introductory article about this software was published in August 2002 Monitoring Times magazine.
I worked with other VR-120 owners to develop tk120. The current, experimental version of tk120 works with USA, Japanese, and Export VR-120 and VR-120D models and can:
I implemented tk120 in the Tcl/Tk scripting language which enables it to run on a variety of operating systems. I am looking for beta testers to try tk120 in the MacOS X environment. I have not tested it on other platforms, but it will probably work on them after little or no modification. The free Tcl/Tk interpreter software must be installed on your computer prior to using tk120.
tk120 is distributed free of charge, but it is neither shareware nor in the public domain. tk120 is a copyrighted work released under the terms of the GNU General Public License as published by the Free Software Foundation. tk120 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
All the other lines will contain these fields:
Channel number (0 - 639) Frequency in MHz Mode, case insensitive (optional: am, nfm, wfm) Preferential flag p (optional) Label (an optional 6-char name)
This is a sample memory data .csv file:
Ch,MHz,Mode,Pref,Label 0,0.0000,nfm,, 1,460.5250,nfm,p,"KENDP1" 2,460.5750,nfm,p,"KC F1" 3,460.3750,nfm,p,"KENDP2" 4,462.9750,nfm,p,"KC F2" 5,155.4750,nfm,p,"ISPERN" 6,155.5800,,p,"OSW P" 7,145.1700,nfm,,"IHRPTR" 8,146.5200,nfm,,"HAM" ...
When the mode for a memory channel imported from a CSV file is not specified, the mode will set according to the Auto Band plan.
You can use a separate text editor or spreadsheet program to create, edit, and print memory channel files. tk120.
Tsunetaka Mitsuyasu describes, in Japanese, his 2-transistor home made interface.
Stefano Sella IW3IBF describes, in Italian, a 2-transistor home made interface, but Rubens Monteiro Luciano PU2RML had to replace DZ1, the 4.7 volt Zener diode, with a 3.3 volt white LED acting as a Zener to make the circuit function properly with his VR-500.
Mr. Skinny uses a MAX-232 IC based interface.
tk120 is undergoing development. To download a beta test version, including source code, click on the appropriate link to the left.
Revised April 6, 2004