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[Yaesu] FT1000MP Power Output

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Subject: [Yaesu] FT1000MP Power Output
From: fdavis@nf.sympatico.ca (Frank Davis)
Date: Sat, 26 Apr 1997 22:23:56 +0000
Today  a fault developed with my MP.  The rig is new ,  placed on the air on 
March 04.   I looked inside and 
the RF power mod was done at the factory.

The output power drops to 2.5W after about 15mins of operating.  Its 2.5W on 
all bands and the fault appears 
first as a very rapid fluxuation of the power level up and down until it comes 
to rest at 2.5W.  It seems to be 
related to temperature rise in the rig.  There is plenty of clearance above the 
rig and the fan isn't cycling . 
  With the MOX on and while not keying and listening on my trusty 830S  I can 
hear a weird note on the transmit 
freq of the MP.  Sounds like a keyer making dots at abour 20wpm...but its not 
the keyer because it turned off! 
 I thought it might be something to do with the shack setup...so i disconnected 
everything from the back of the 
rig and checked the coax connectors and grounds straps etc  took the rig 
completely out of the rack shelf  and 
then put it all back and hooked it up again ...but after abt 15 mins on CW at 
100W the fault came on again.
Anyone experience this kind of thing before...if so  HELP !!!

Frank VO1HP

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