On Cw the qsk icon is always on regardless of delay and the receiver does not completely mute.

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  • Updated 7 months ago
I have a 6500 and have noticed that the receiver does not completely mute.
This was noticed as a defect DE 1481 which seems to have reared its ugly
head. Regardless of delay the qsk stays lit and the receiver will not completely
mute when using a footswitch. The same happens when I hit the mox button.
SSB is all right, just CW.
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N9VC

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Posted 2 years ago

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Tim - W4TME, Customer Experience Manager

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The QSK indicator is an indication that the radio is meeting the requirements for being able to to do QSK.
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N9VC

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OK, but should the radio not completely mute when you hit the MOX button or
the foot switch? It will mute on SSB all right. It matters not where the delay is
0 or 2000, you can hear background noise (attenuated) and see a S meter
reading (also attenuated). On SSB, it mutes completely and the S meter goes
to zero. Is the radio designed this way ? I had read where Gerald had said
it was a defect DE 1481, which is why I posed the question. But if it designed
that way and operation is normal, then I can accept that. Thanks.

73, Jim N9VC
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N9VC

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Thanks, Tim. I appreciate all you do for us.

73, Jim N9VC
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Tom K3TF

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FYI, I am a CW only operator and run QSK full break-in all the time. Just got a new Flex 6500, downloaded the latest FW, and have not noticed any low level RX while sending. I just tried cranking volume to max and tried no delay and a long delay and no receiver sound while transmitting. I only use headphones, no speakers, I wonder if the condition only occurs when using speakers? 
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N9VC

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Hi Tom,

I run CW a lot also and hear it in the headphones. When it is actually sending,
the background noise does stop. If I only hold the foot switch down in the beta
version or hit the MOX button but do not send, the noise is present and the s
meter shows S1-S2. The noise is low level, but there, as I indicated earlier.
The noise is not present when I do the same thing on SSB. Probably the
reason being is that it's actually in transmit and not waiting for for me to hit the
key to emit RF.

73, Jim N9VC
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Tom K3TF

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Hi Jim,

You are right! Normally I never use the MOX button or a footswitch. As long as the fix  does not increase the recovery time of the receiver between dots when running QSK zero delay I am happy. Tnx for the info. 161, Tom K3TF.........
(Edited)
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N9VC

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Hi again Tom,

And I agree, the QSK ability should stay as is for ops doing QSK.

73 and Merry Christmas
Jim N9VC
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Kevin K4VD, Elroy

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I don't have my foot switch hooked up to try it out. The audio below is from a 6500 using Audacity.

First few seconds: current received noise
Next few seconds: noise in CW mode with MOX on
Next few moments: current received noise
Next few seconds: Breakin, 2 second delay, quick dit keyed
Last few seconds: current received noise

https://goo.gl/oL7JWa

Is the noise during MOX the issue being reported? I always use breakin so never noticed the noise with MOX before. I don't necessarily find it a problem but it does seem odd that it is there.

Also, I agree, the QSK indicator being on when the radio is obviously not set up for QSK seems wrong to me. QSK should only be displayed if breakin is on and delay is 0. Right? Add any delay or manually control TX/RX switching and  you are no longer running QSK. I saw somewhere that all QSK means is that the rig is "ready" for QSK. Silly. That's like having the power on indicator green even when the rig is off just because it is ready to turn on.

Kev
(Edited)
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Tim - W4TME, Customer Experience Manager

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Remember, there is an AGC action at play on the received audio.
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Tom K3TF

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View from another CW operator. I like the QSK indicator the way it is. It lets me know that I am using the PIN diode and reed relay combo and will not be generating loud relay clicking while the XYL is sleeping. Just my view.
(Edited)
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Kevin K4VD, Elroy

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What does QSK mean? Maybe my definition is not correct. It has to do with how fast the radio switches over, not how much noise the radio makes when switching. I'll admit, I could be wrong about this and I might not understand QSK except in all other rigs I've ever owned (and I know Flex is redefining many concepts), QSK means full-breakin. Setting a 2 second delay or using MOX is not QSK.

I'm not disagreeing there could be some indication made available for how much noise the radio generates but I'm not sure that utilizing the QSK indicator is the right thing.

Tim... I don't know what you mean. If you are referring to my audio file what would AGC have to do with the noise present while MOX is on? When MOX is on, shouldn't the receiver be silenced? I'm not running FDX.
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N9VC

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Hi Tim,

Further observations from me. Closer attention
indicates, although there is background noise,
when the footswitch or MOX button is pressed,
no stations can be heard. So my thoughts are
based on what you say. It is being done that
way to prevent AGC action from preventing QSK.
So guess what, no problem now that I understand
it better. I was just afraid at the onset that
receiver damage could result using the 6500
as a panadaptor thru an IF output on another
transceiver. Not sure I could find another
transceiver to measure up to my Flex 6500
anyway. Thanks and Merry Christmas.

73, Jim N9VC
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Roy Stiegler

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I am running a 6500. 

I recently upgraded to SSDR ver 1.10.16.91.  I see the same thing N9VC mentioned.  Hit MOX or PTT pedal and the RF signals go away but the noise is still there.  The speaker is not completely muted.   Occurs  only in CW mode.

If I send msg with CWX, sidetone comes on as normal, signal is transmitted, and noise stays away until the end of msg.  Then the noise returns until I release the mox or PTT pedal.

I downgraded back to SSDR ver 1.9.13.89 (which is what I had been running) and this flaw goes away.  Then back to SSDR ver 1.10.16.91 and it comes back.  I cycled the procedure several times and it occurs everytime.

This does not seem normal and is very annoying to me.  For me, I can just go back to the old ver 1.9.13.89 that I had been running, but something is not correct about his.

Otherwise, transceiver works normally and performs well.

Roy W5TCX
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Joe N3HEE

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I have a 6600M.  I am hearing a relay no matter what combo of antennas are selected.  The QSK icon is always on no matter what the CW delay settings are?  Why? The BREAKIN button seems to disable transmit ?  I would think BREAKIN button would enable or disable QSK ?  Something doesnt seem quite right here compared to other radios I've owned.


The manual says this about QSK....  

  • PIN diode silent CW QSK operation on ANT1 and ANT2 require that both receive and transmit be on the same antenna or that a dedicated receive-only antenna be used on RX A, RX B, XVTA or XVTB. If ANT1 and ANT2 are used separately as receive and transmit antennas, the transmitter reverts to mechanical relay TR switching. Each Slice has a QSK annunciator that indicates when PIN diode TR switching is engaged.


Can someone please tell me what Flex's design philosohy is in regards to  CW on this radio?

I'm a bit confused !

Joe

N3HEE