What is the power supply voltage doing when this is going on?
Does it do it when transmitting into a dummy load rated for 2m and up?
Just a couple of things to check.
Good luck es 73 de W1EL
----- Original Message -----
From: "fire-eyes" <sgtphou@fire-eyes.org>
To: <yaesu@contesting.com>
Sent: Tuesday, February 13, 2007 4:08 PM
Subject: [Yaesu] FT-100D, wild behavior randomly on PTT
> Hello List,
>
> I am having a curious and aggravating problem. I have an FT-100D. On 2M
> (the only band I have an antenna for), i get an intermittent issue when
> I press PTT.
>
> Sometimes it will transmit as expected. Other times, perhaps 30% of the
> time, it acts as if the PTT switch is dirty or bad. It then either fails
> to transmit, or does so in a very rapid on/off/on/off pattern. At the
> same time, it acts as if I am pushing either the up or down button on
> the top of the mic.
>
> When this issue happens, it seems to be "down" that is somehow triggered
> more than up. Perhaps 80% of the time.
>
> I have taken apart the MH-36b microphone. It looks okay in there, though
> I do not have any tools to do further testing. I was not able to get the
> board to separate from the mic body.
>
> Could this be a hairline crack in the board, which is usually making
> contact fine but other times is not, which then somehow spits out
> incorrect signals to the radio?
>
> I heard one idea from another ham, who mentioned that it could be RF
> getting back into the shack. However this problem happens just as
> randomly on 1W as it does at 50W. I have tried in FM and SSB, still
> seems the same.
>
> It was also suggested that I try to key up the radio in another manner,
> such as a CW key, however I do not have one at this point. Nor the tools
> or much of anything to build one, as I've been out of the hobby for a
> number of years.
>
> My match is good.
>
> Does this all sound familiar to anybody?
> --
> "I've missed more than 9000 shots in my career. I've lost almost 300
> games. 26 times, I've been trusted to take the game winning shot and
> missed. I've failed over and over and over again in my life. And that is
> why I succeed." - Michael Jordan
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