Yaesu VX-1 R (VX 1 R VX1R) user and service manual, modifications

   
 
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03 September 2014, 3:05 UTC 


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Yaesu VX 1R (VX-1 R VX1R)
VX-1
Programming interface schematics for Yaesu VX-1 R (VX 1 R VX1R) : programming interface, Yaesu VX-1 R (VX 1 R VX1R) 4 pin plug
Programming software (MARS/CAP/extend TX modification) for Yaesu VX-1 R (VX 1 R VX1R) :  Yaesu VX-1 ADMS download
PDF User Manual for Yaesu VX-1 R (VX 1 R VX1R) : 

Mods for Yaesu VX 1 R (VX-1 R VX1R) :
   Yaesu VX-1 R (VX 1 R VX1R) Yaesu VX1 & VX-110 Ext. Mic Diagrams
   Yaesu VX-1 R (VX 1 R VX1R) MARS/CAP mod
   Yaesu VX-1 R (VX 1 R VX1R) Determine Firmware version
   Yaesu VX-1 R (VX 1 R VX1R) Continuous single-band RX modification
   Yaesu VX-1 R (VX 1 R VX1R) Lost data in VX-1 CPU for Squelch & S meter functions
   Yaesu VX-1 R (VX 1 R VX1R) Quick Reference
   Yaesu VX-1 R (VX 1 R VX1R) crossband operation
   Yaesu VX-1 R (VX 1 R VX1R) Schematic diagram for PC programming cable
   Yaesu VX-1 R (VX 1 R VX1R) Template modifier
   Yaesu VX-1 R (VX 1 R VX1R) Bad connection with the antenna
   Yaesu VX-1 R (VX 1 R VX1R) Cell and expanded TX RX Mod
   Yaesu VX-1 R (VX 1 R VX1R) Version test
   Yaesu VX-1 R (VX 1 R VX1R) Internal System Alignment Routine
   Yaesu VX-1 R (VX 1 R VX1R) Expanded Transmit 137 - 175, 410 - 470 MHz

Yaesu VX-1 R (VX 1 R VX1R) technical specifications :  Yaesu VX 1 R (VX-1 R VX1R) technical specifications

Yaesu VX-1 R (VX 1 R VX1R) Schematic diagram for PC programming cable

PC Programming Parts List

    Q1 = 2N2222
    Q2 = 2N2222
    Q3 = 2N2222
    Q4 = 2N2222
    Q5 = Not Used
    Q6 = 2N3906
    Q7 =2N3906
    D1 = 1N914
    D2 = 1N751A
    D3 = 1N914
    D4 = 1N914
    R1 = 47K
    R2 = 47K
    R3 = 10K
    R4 = 12K
    R5 = 470K
    R6 = 47K
    R7 = 47K
    R8 = 47K
    R9 = 100K
    R10 = 100K

The abbreviation NC means no connection.
The DB9 connector can be Radio Shack part # 276-1538 or equivalent.
A good place to start looking for the 4 conductor plug is Tower Electronics: 1-800-662-3422. The 2N2222 can be substituted for any general purpose NPN transistor, while the 2N3906 can also be substituted for any general purpose PNP transistor. D1,3,4 are general purpose silicon diodes. D2 is any 5.1V zener diode.
All resistors are 1/4 or 1/8watt - 5% tolerence resistors. This PC programming cable can also be built with SMT (Surface Mount Technology) parts if desired.



The interface is a bidirectional level converter, changing TTL-level to RS232, and vice versa.
The supply voltage comes from RTS, CTS and DTR and is stabilized with D2 to 5V. Q1 works as a simple switch, getting the data viz R8 from the PC. In the opposite way Q2 drives the push pull stage Q6 and Q4.

This cable works with the Yaesu FT-50, VX-1R, VX-5R. The cable can also be adapted to work with the FT-10 & FT-40 - which use a 3 conductor programming cable.


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PMR446


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