I N R A D
FT-1000MP, FT-1000MP MV and FT-1000MP MV Field IF Mod
The FT-1000MP series radios are outstanding performers with excellent design.
Many users however, have noticed background noise or hiss in the audio output.
This noise is coming from the third IF at 455 kHz which has a great deal of gain
after the last filter. The wideband noise from this amplifier is responsible for this
The IF mod kit adds a few dB gain to the first IF at 70.455 MHz just before the 2
mixer to 8.215 MHz. The gain at the 455 kHz IF is then reduced through a menu
item, and the net result is a noticeable reduction in the annoying IF hiss and an
improvement in the noise floor of a few dB. The net result is a more sensitive
radio which has a better, more pleasing sound.
The mod kit is completely assembled and is very easy to install. A bonus mod is
included which improves the sound of the main receiver on CW.
Warning: Modern radios contain components which may be damaged by
static discharge. Precautions must be taken to eliminate any static
electricity buildup between the operator and the radio before any of the
internal circuits are touched. If you are not familiar with the proper
techniques for this, consult the Radio Amateurs Handbook.
Remove the AC line cord from the transceiver.
Remove the bottom cover.
On the Audio Board, locate the outlined area labeled "AF-FIL" in the board
quadrant nearest the center of the radio and the rear panel.
Locate the two holes at diagonally opposite corners of the outlined area.
Using a nut driver or pliers, press two board mounting standoffs (supplied)
into the holes. Use care to not overstress the board. A rocking motion is
If your radio is an original MP and not a Mark V, slip the assembled IF
mod assembly onto the connectors in the radio and align the
standoffs with the board holes. If your radio is a Mark V or Field model,
the male connectors have not been installed at the factory. You will need
to fashion 2 male pins as shown in the attached sketch.
13620 Tyee Road
fax (541) 459 5632
Umpqua, OR 97486
E-mail: firstname.lastname@example.org www.qth.com/INRAD