[1000mp] Transmit Problem

[Bob Martin]

Hello my name is Bob Martin, WV8BOB.  I am having a problem
with my FT-1000MP Mark V and I was told that you are the man
that I need to talk with about it.  Let me describe my
problem with my Yaesu FT-1000MP Mark V.   The radio suffered
really quick power ons and power offs when the power to my
house went off and on about three times.  I didn't use the
TX side of the radio anymore the rest of the evening after
it was exposed to the off and on situation.  This was not
due to lighting, but just the main power going off and on.
The next morning after powering on the radio I tried to TX
and didn't have any output.  I couldn't find any reason for
my TX failure so I just powered the radio off and back on
and anything started working again.  Later on that same
morning I was get bad audio reports.  I heard comments from
everything from RF to warbling or starving for power.   I
have checked all the obvious things such as mic gain to
high, bad mic, by-passing audio equipment, bad cables or
connectors, etc.  My FT-2000 works fine using the same cable
set up that I use with the FT-1000.  So I highly suspect the
power supply but more then likely it is transmitter problem.
The distortion is in SSB mode, but an output power meter
level breakdown is seem in CW mode.

 

Now here is what I know so far about the problem.  The
problem starts about 5 minute after using the TX and usually
gets worse the longer I use the radio.  When I stop TX for a
while and resume the output is ok and then starts getting
distorted again.  The power supply shows the 30VDC out with
no load when I check it with my voltmeter and on the
voltmeter on the radio.  When I put the radio in the CW
mode, regardless of the RF output power setting, after a few
minutes of TX the power meter shows the RF power falls off
about three quarters and then jumps back up to full power
and then drops off again.  It will continue jumping around
until I let it rest a few minutes.  The 30VDC meter on the
radio drops to 28VDC during this CW output test, but does
not change when the RF power meter starts jumping back and
forth. 

 

Thank,

Bob Martin