Modification of FT-840.

Why I bay it?

In my opinion , FT-840 is economical variant of solid series Yaesu radios , like FT-890, FT-900, FT-990. He have a direct digital sintesator , microprocessor services and high dynamical range receiver . But economical factor give a some nonfunctional reality, like not ergonomic RTTY and DATA communication, low dynamical range in 1-st IF at low frequencies bands.

Радиологические и рентгенологические исследования проводила ветеринарная клиника Воронеж "ВетЛига".


 

Modifications.

  1. Full band transmitting.
  2. Install narrow CW filter, like described in operating manual.
  3. Handy gain control.
  4. Switching narrow CW filter for digital modes.
  5. Installing external PTT (optional).


Tips FT-840

If you wont to change a receiver carrier frequency - it is very simple. Turn radio off, push "SSB" and "FM" and hold it, turn radio on, tuning main knob to wonted frequency, press "SSB", turn radio off, turn radio on.

If you wont to change a transmitter carrier frequency - it is very simple. Turn radio off, push "SSB" and "FM" and hold it, turn radio on, press "MOX" tuning main knob to wonted frequency, press "SSB", press "MOX" again, turn radio off, turn radio on.

If you know any more about FT-840 mods

write me pleas .