[1000mp] FT1000MP, side tone on cw

[Joe Giacobello, K2XX]

Graeme, this is a common problem with DC version of the MP.  I have been 
plagued with intermittently since I've had mine.  There are several 
cures that work at at least temporarily.  Some of these are recommended 
by Yaesu in a bulletin.

1. Clean your PSU terminals and cable terminals with contact cleaner.
2. Solder the connections between the power cable terminals and the fuse 
holder terminals.  They are normally just crimped connections.
3. Put a 0.1 uFd capacitor across your power supply terminals.
4. Shorten your power cable as much as possible.

You'll probably have ot clean the PSU terminals periodically to prevent 
recurrences.  The problem usually manifests in my MP by generating a 
chirp, which can be minimized by reducing output power.

73, Joe

Graeme Jackson wrote:

>Hi everyone,
>A few months ago I purchased a second hand ft1000mpdc, I seem to be dogged by what I thought were RFI problems.
>When on cw the side tone, ether spot tone or monitor tone was being clipped on the first transmission character.  At first I thought it was rf getting into the rig, but after some expermentation on antenna and dummy load It seemed as though the problem was present on both whenever the power was higher than 50 watts.
>I noticed that when VCC was selected on bar graph meter the indicated voltage would drop 2 digits ( ie from 14volts down to 12volts ) when on full 100watts cw output.
>I thought this maybe the problem,  anyway to cut a long story short I checked the inline fuses and waggled the dc power plug on the rear of the rig and tried again, ----- My problem had dissapered.
>The bar graph on VCC still drops alot when on full power, my psu is also stablised------I wonder if other people have the same indications as me ?
>
>Graeme------ G4CKH.
>
>
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