[Yaesu] FT990 no output power

[Ron Youvan]

   Rick Gouge wrote:

> Hello. I just pick up a FT990 that is mint because it has been sitting for over 6 years without being used. There is no power out but receives great. I also notice the there is no voltage reading when i put it to Vcc on the meter and the antenna tuner does not work. I think. It goes through its acttion and stops the red light goes out and the green light stays on But i can not hear the tunner working at all. I`am thinking that if there is no voltage reading on the Vcc that is causing the problem. This rig has very little use and its been sitting for years. Any ideas ? Please help me save this radio guys. Rick VE7RiK

   I love my FT990.  I don't know if there is a fuse or not, but one needs looked for.
The final output amplifier (block) is what is being monitored so it most likely has nothing to do
with the little boards.  (Daughter cards.)

   Does it have an internal power supply?  Is that what you are using?
Have you tried an external power supply?  (also for mobile use)

   Have you tried another external supply?  (Assuming there is no internal supply.)
   (without being able to supply 20 Amperes without the voltage dropping, it won't work)

   Without about 5 watts of output RF power the internal tuner can not do anything useful.
-- 
    73 Ron KA4INM - All E-mail sent to this address shall linger in the Google cloud forever!