[Elecraft] KX3 PTT Issue

[Wayne Burdick]

Jim,

The KX3's mic jack has some special wiring to work with the MH3. As alternative, you can use the ACC2 jack (2.5 mm) to wire in a PTT switch. This is discussed in the KX3 owner's manual -- see the ACC2 IO menu entry. This would allow you to use the mic jack with your headset/mic.

Also note that the "XMIT" switch functions exactly like PTT, and is conveniently located close to the mic jack.

73,
Wayne
N6KR



On Nov 12, 2014, at 6:15 PM, James Bennett <w6jhb at me.com> wrote:

> Need a little help on this one. I have an inexpensive mic/headset that has a three connector plug (TRS). If I plug it into the Mic jack on the KX3, it works fine, although I have to use VOX, which, having an 18 month old in the house, is not a good choice! I've only made a few SSB QSO's (I'm primarily a CW op), but audio reports I get lead me to believe this mic is acceptable.
> 
> OK, while on CW I don't always like using QSK. So I built a small PTT switch that has a momentary button and an on/off toggle switch. I plug this into the mic jack. It has a four connector plug - TRRS. My switches short ring 1 and ring 2 together. Works great. 
> 
> When I decided to try some occasional SSB, I had the problem of only ONE mic jack. So, I purchased an "octopus" connector. It has one TRRS male plug and three female TRRS jacks. I plug my headset mic into one jack and my homebrew PTT switch into another. When I'm on CW, all works fine - I press the PTT, the KX3 goes into transmit and I send CW with my paddle. But on SSB, things no longer work. If I put the KX3 into VOX, that works. If I put the KX3 into PTT mode and press my PTT switch, the radio goes into transmit, but speaking into the mic produces no audio! 
> 
> I put my VOM on the octopus leads. They are all as they should be - straight through on each connector - nothing cross connected. I've tried it with MIC BTN set to OFF and PTT. Neither makes it work.
> 
> What do I have set wrong that's causing this strange behavior?
> 
> Jim Bennett / W6JHB
> Folsom, CA
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