Topband: ft1000mp mkv key click mod

Bill Tippett btippett at
Sat Dec 31 11:40:56 EST 2005


 >I came to the same conclusion from the W8JI site when I was endevouring to
fix a friends set....

 >Is there another mod on the web....... I've heard that it can be fixed.

         If I am not mistaken, I believe all FT-1000MP's are basically
the same.  I think the MP mod on Tom's site also applies to the Mark V and
Field.  Inrad also offers a mod for the MP family:


Yaesu FT-1000MP / Mark V / Mark V Field Keying Improvement
The MP keying rise time is 2.4 mS and fall time is 1.0 mS. The fall 
time is responsible for the somewhat wide signal, which the MP 
generates on CW. There are two points in the radio which can be used 
to improve the keying by slowing the voltage change over from receive 
to transmit and back.

Three parts are added to the radio. Two go on the IF board and one 
goes on the RF board. They are small leaded parts which solder on the 
bottom side of the boards. Board drawings are supplied which show the 
part locations. The IF board is fairly easy to get at. The RF board 
is buried under the final amplifier and is somewhat difficult to get 
at. Estimated time to install is 1 hour.

For actual spectral data on the keying improvement made by this mod, 
click below:

Price: $15 plus shipping & handling. See our Secure Order Form to order.


         If my memory is correct, Yaesu implemented Inrad's
mod in all MP's after about August 2004 (or 2003?)  Tom's
own site says his MP mod takes it from being one of the
worst to one of the best, so I am not sure why he is so
negative on the Mark V unless there were some circuitry
changes from the original MP to the Mark V and Field.  Inrad's
mod makes me think not.

                                         73,  Bill  W4ZV

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