home *** CD-ROM | disk | FTP | other *** search
-
-
- YAESU FT-73R MODIFICATION.
- ==========================
-
- This modification converts the set from 430.00 MHz to 440.00 MHz.
-
- 1. Remove links 7 & 8 which will open the display from 220 - 550 MHz.
- 2. With a digital voltmeter measure the voltage on pin 6 of the
- (PLL IC).
- 3. Remove the copper plate over the VCO.
- 4. Inside should be two trimmers next to each other.
- 5. On TX at the bottom of the band (433.00 MHz), adjust the right hand
- trimmer to read .1V on pin 6 of the PLL IC.
- 6. On RX, adjust the other trimmer for .1V on pin 6 of the PLL IC.
- 7. Keep adjusting until .1V is obtained on both TX and RX.
-
-
- Yaesu FT-73Rfrequency coverage modification
- ===========================================
-
- This modification converts the coverage from 430-440MHz to 433-453MHz.
-
- 1. Remove links 7 & 8 which will open the display from 220-550MHz.
- 2. With a digital voltmeter measure the voltage on pin 6 of the PLL IC.
- 3. Remove the copper plate over the V.C.O.
- 4. Inside should be two trimmers next to each other.
- 5. On Tx at the bottom of the band (433.00MHz) adjust the right hand trimmer
- to read .1v on pin 6 of the PLL IC.
- 6. On Rx adjust the other trimmer for .1V on pin 6 of the PLL IC.
- 7. Keep adjusting until .1v is obtained on both.
-
- G3ZHI.
-