[1000mp] Low Output on the Mark V

Wed, 27 Feb 2002 22:34:49 -0600

Mike:

I had a similar problem ... it was a problem with some diodes in the output
section - diodes that act as a low-pass filter - if bad the finals think it
is putting out too little power and jacks up its output.  Eventually the
finals burn out !  The solution (from Andy at Yaesu) is to use the diodes
found in the 1000D which apparently are 'stouter'.

Sorry ... off to the shop.  Warranty jobs will be back in under a month.

Jamie
WB4YDL

> From: "Mike Schatzberg" <[email protected]>
> Reply-To: [email protected]
> Date: Wed, 27 Feb 2002 16:48:37 -0500
> To: <[email protected]>
> Subject: [1000mp] Low Output on the Mark V
> 
> Hello Yaesu Fans.....
> 
> My new Mark V always indicates 200 Watts on the PO scale....every
> band.....with the power output control full clockwise.....
> 
> But my Autek WM-1, Bird 43, and matchbox all say, that the output drops to
> about 175 watts on 20 meters, 150 watts on 15, and 125 watts on 10 meters, all
> into a 50 ohm dummy load, as well as my antenna system.....The rig does
> provide 200 watts on 40 meters and lower....
> 
> It appears that the rig thinks it is putting out 200 watts, as the meter
> indicates full output.....and is limiting the output to the preset level of
> 200 watts....
> 
> I have written to Yaesu and asked for a fix, to avoid sending the rig back for
> retuning....it seems like if I could adjust the power output calibration on
> the higher frequencies, perhaps the rig would output at the correct level.....
> 
> No other problems appear to be present....suggestions?
> 
> Thanks and 73,
> 
> Mike
> WB2AJI
> 
> 
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