How to Adjust the RF Power Output
PROBLEM: I just swapped in a second
FT-1000MP (98-era) that I purchased used a few months ago, but which I
have never used until now. I discovered that it showed 147 watts output
on 160 meters, where my other (97-era) 'MP maxed out just above the
With menu item 4-0 set to '100' watts, the max output is 147 watts.
With menu item 4-0 set to '50' watts, the max output is 80 watts.
With menu item 4-0 set to '10' watts, the max output is 14 watts.
1) Is there a known problem that this is a symptom of?
2) Is there a user adjustment that the previous owner might have made to
juice the output?
My amplifier requires only 50 watts to make legal-limit output, and I
normally operate my primary 'MP with 4-0 set to '50', so throttling back
the drive will be natural for me. I'd still like to determine whether
there is a problem building to a failure! 73, Jeff Maass K8ND
SOLUTION: Here is the excerpt from
the technical manual to adjust RF Power Output:
* Preset the RF PWR control fully clockwise, and tune the transceiver to
14.2000 MHZ. Select CW mode, then key the transmitter and adjust VR3003
100 watts on the meter.
While you can adjust for more than
Watts, this is NOT RECOMMENDED)
* Move switch S3002 from 100W to the 50W position. Connect the in-line
meter and 50Ohm dummy load to the antenna jack, select CW mode and tune
14.2000MHz. Set the RF PWR control fully clockwise. Key the transmitter,
adjust VR3007 for 50W on the power meter.
* Recall menu function 4-0, and select 10W. Key the transmitter, and
VR3006 for 10W on the power meter. After adjustment, recall menu
4-0, then select 100W. Move switch S3002 back to the 100W position.
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