6600M goes into transmit mode all by itself.

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  • Updated 1 month ago
When I started typing the title for this post it completed the post. So I started looking for similar posts so I assume it has happened to someone else but I did not find the post.

I was fixing dinner listening to the Flex receiving CW signals in the background. I heard a huge carrier on the frequency only to find that the Flex was transmitting. The MOX button was lit but pushing it would not stop it from transmitting. The only thing I could do was turn the radio off.

This morning it happened again while I was typing an email message. I observed that the radio was in the CW portion of the band although it was set to DIGU because that was the last mode I had used (FT8) The output from the FLEX was 57 watts. Which is where I had it set using for FT8. It may have been set the same way but in my panic to stop the radio I didn't notice the settings. (No software related to the FLEX was running)
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Terry K8EET

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Posted 2 months ago

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NA0B

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This happened to me a couple of times while I had the radio in WSPR. The radio started transmitting at the TUNE power (10 watts). I could not reproduce this behavior, so I attributed to it to some WSJT-X miscommunication with the Flex 600M.
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Michael Walker, Technologist

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Hi Terry

The radio will only go into TX if something tells it to, or the VOX is on and it heard something.

I would look in SmartSDR CAT and see what devices/programs are connected and work backwards from there.

Mike
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Terry K8EET

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Mike,

The radio was the only thing on or the only thing that was on the second time this happened. I'm not sure about the first time it happened. (I was in a panic to get it out of the transmit condition.) The second time it happened the only thing open on the computer was my email program.  The mode was set DIGU. Not sure why it was in the CW portion except I had only turned the radio on and, as I normally do, look to see if any bands are open. 

I have done some experimenting today.  I did find that in DIGU mode, if the VOX is turned on, it is possible to engage the VOX with a good solid clap in front of the mike. Nothing seems to be transmitted, the MOX light does not come on. By setting my speakers and gains up as loud as they will go, the VOX will engage if it is turned up to about 75. That's twice as high as I have my VOX set and I assure you my volume is set very low when I'm in digital modes.

I cannot recreate the problem. I am concerned about leaving the rig on to operate from my daughters home 1,800 miles away.

Terry
K8EET

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Ken - NM9P, Elmer

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I wonder about using VOX with DigU anyway. Most programs have the ability to do CAT port keying of PTT.

If VOX is activating with a loud clap, then you have an extraneous mic source activating it. Check what mic profile you have active, Ann/or if you have something mirroring your computer mic into the DAX input.

Something is amiss.....

Ken - NM9P
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Terry K8EET

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I have not been able to duplicate this issue. I will have to be more observant if it happens again. I would say it's a PTT issue rather than a VOX issue because the MOX light was lit. If this happens to someone else, don't panic if you can't get out of the transmit mode. Try to observe what may have caused it before you turn the radio off.
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Terry K8EET

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It happened again today. The Flex (6600M) was in the CW mode. Computer turned off. The MOX switch was lit. There was no output but there was sidetone. Normally, there is no sidetone when the MOX switch is engaged in the CW mode. (At least on my 6600.)
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Michael Walker, Technologist

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Hi Terry

This is a new one.  

Can we confirm that nothing else was connected?  

When the this happened, was there a Key connected to the radio?  Can you test for a bit without the Key connected?

Mike
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Terry K8EET

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Mike,

I was thinking along the same line. A key was attached but not keyed of course. I pulled the plug from the back of the FLEX. I'm leaving it on to see what happens. Previously, this happened when it was left in DIGU.

As I was typing this it came back on and there is a full 50 watts output. This time I was able to stop it transmitting by pressing the TX button which was lit. I hadn't tried that before. So now I'm going to turn the TX back on. (For Slice A) and see what happens.  
(Edited)
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Michael Walker, Technologist

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I have created a support ticket.
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Terry K8EET

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Thanks, Michael 

 I have to tell you I disconnected the line going to the amp rather than the key which I discovered when I couldn't tune the amp. So I have disconnected the key. I'm a light sleeper so I think I will hear it if it keys overnight.