[Yaesu] FT1000MP won't transmit on just 40M

Cecil chacuff at cableone.net
Fri Feb 27 10:07:19 EST 2015

Chester when you say won't transmit at all can you be more descriptive?  Does the TX LED come on when the radio is keyed?  With the meter looking at the DC current being drawn does the current being drawn increase when the radio is keyed?  It's been a while since I've owned a MKV so I'm not clear on the metering positions but you should be able to monitor the DC voltage and current.

You could have a transmit bandpass filter relay in trouble...or if they are switched in and out with pin diodes one of them has failed...like I said it's been a few years since I owned one or looked at a schematic for one...

To me that's the most logical explanation.

If the current drawn by the radio on that band increases as on other bands when keyed on 40m but there is no RF output...that is most likely the cause.  I'm sure you have already verified that you have selected the correct antenna port for that band? I believe that's switchable from the front panel.

Good luck with it...


Sent using recycled electrons.

> On Feb 26, 2015, at 9:41 PM, Carl Lester via Yaesu <yaesu at contesting.com> wrote:
> Hi All!   I have had this problem every once in a long while, where my 1000MP won't transmit on 40M.  It works every where else, but not 40M. In the past I usually turn it off, and back on, and it works again! Sometimes it takes 2 times.  Anyway, tonight I can't get it to comeback.  I've done a global reset, but no help. 
> Any ideas?  
> Thanks & 73,Carl,  K2YR
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