[1000mp] FT1000MP PA issue

[David Robinson]

Returning from the 3B9C trip I switched on my FT1000MP to find the PA
behaving strangely. The power rolls off severely with frequency

On 160m the PA runs 22A and produces 140W
On 40m the PA runs 20A and produces 110W
On 20m the PA runs 8A and produces 45W 
On 15m the PA runs 5A and produces 20W
0n 10m PA runs 7A anp produces 40W

The powers were measured at the output of the PA board

I have measured the drive to the PA module and it is flat within +-1dB. The
bias voltages on the transistors seem correct, suggesting its not a
transistor problem

Has anyone else encountered and fixed this problem?

Dave

WW2R, G4FRE

WEB: http://users3.ev1.net/~g4fre/ww2r.htm


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