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De-sensed K3 after xmit

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WE5ST

De-sensed K3 after xmit

Anyone have a similar experience?

Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.

Thanks,
Jack - WE5ST

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Jack - WE5ST

WE5ST

Re: De-sensed K3 after xmit

No box, no squelch.

On Jan 14, 2012, at 9:38 PM, "KENT TRIMBLE, K9ZTV" <[hidden email]> wrote:

> Or Squelch is on?
>
> Kent
>
> On 1/14/2012 9:15 PM, Jack Berry wrote:
>>
>> Anyone have a similar experience?
>>
>> Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.
>>
>> Thanks,
>> Jack - WE5ST
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>>

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Jack - WE5ST

Dave Perry N4QS

Re: De-sensed K3 after xmit

In reply to this post by WE5ST

This just happened today to me during the NA QSO party on 20M.

Dave, N4QS

Sent via BlackBerry by AT&T

-----Original Message-----
From: Jack Berry <[hidden email]>
Sender: [hidden email]
Date: Sat, 14 Jan 2012 21:15:53
To: [hidden email]<[hidden email]>
Subject: [Elecraft] De-sensed K3 after xmit

Anyone have a similar experience?

Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.

Thanks,
Jack - WE5ST

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Pete Smith N4ZR

Re: De-sensed K3 after xmit

In reply to this post by WE5ST

Jack, what AGC setting do you use? I have noticed something similar
here, since around the time I updated to the latest firmware. I'm not
suggesting cause and effect, just approximately how long it's been>

73, Pete N4ZR

The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000

On 1/14/2012 10:15 PM, Jack Berry wrote:

> Anyone have a similar experience?
>
> Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.
>
> Thanks,
> Jack - WE5ST
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

Sverre Holm (LA3ZA)

Re: De-sensed K3 after xmit

In reply to this post by WE5ST

I have experienced something similar and my impression is that it is the noise blanker that sometimes needs some time to recover, but this is just my gut feeling at the moment.

Sverre, LA3ZA

K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html

Don Wilhelm-4

Re: De-sensed K3 after xmit

In reply to this post by Pete Smith N4ZR

Pete,

I had a similar experience last year at Field Day. It only happened on
40 meters. It turned out to be a loose PL-259 connector on the 40 meter
bandpass filter.

73,
Don W3FPR

On 1/15/2012 7:36 AM, Pete Smith N4ZR wrote:

> Jack, what AGC setting do you use? I have noticed something similar
> here, since around the time I updated to the latest firmware. I'm not
> suggesting cause and effect, just approximately how long it's been>
>
> 73, Pete N4ZR
>
> The World Contest Station Database, updated daily at www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
> spots at telnet.reversebeacon.net, port 7000
>
>
> On 1/14/2012 10:15 PM, Jack Berry wrote:
>> Anyone have a similar experience?
>>
>> Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.
>>
>> Thanks,
>> Jack - WE5ST
>>

Arie Kleingeld PA3A-2

Re: De-sensed K3 after xmit

In reply to this post by WE5ST

Jack,

Is this happening when working strong stations ?

What I notice, for example in a contest, is that after working a strong
station and logging the QSO with a TU, the RX is still desensed by the
AGC action caused by the strong station I just worked. The AGC keeps
starts off where it is left as you start transmitting. Getting back to
full sensitivity then, is set by the agc settings.

73
Arie PA3A

Op 15-1-2012 4:15, Jack Berry schreef:
> Anyone have a similar experience?
>
> Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.
>
> Thanks,
> Jack - WE5ST
>
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Dave, W8OV

Re: De-sensed K3 after xmit

In reply to this post by WE5ST

I had a similar problem years ago with other gear. It all went away
when I replaced a connector feeding the coax through a wall.

--Dave, W8OV

On 1/14/2012 9:15 PM, Jack Berry wrote:
> Anyone have a similar experience?
>
> Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.
>
> Thanks,
> Jack - WE5ST
>
______________________________________________________________
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WE5ST

Re: De-sensed K3 after xmit

Thanks everyone. I'll check AGC and PL-259's today when I get back to the shack. I have not (purposefully) touched AGC so it should at default settings. Seldom use noise reduction either. I will pay close attention to signal strengths as well.

Jack

On Jan 15, 2012, at 7:32 AM, "Dave, W8OV" <[hidden email]> wrote:

> I had a similar problem years ago with other gear. It all went away
> when I replaced a connector feeding the coax through a wall.
>
> --Dave, W8OV
>
> On 1/14/2012 9:15 PM, Jack Berry wrote:
>> Anyone have a similar experience?
>>
>> Only occasionally, I notice that when I end a transmission my K3 receive seems almost muted. It recovers to normal sensitivity very quickly. I so far see no pattern to the effect that might suggest a cause.
>>
>> Thanks,
>> Jack - WE5ST
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Jack - WE5ST

Dave Perry N4QS

Re: De-sensed K3 after xmit

My incident yesterday was on 20M CW during the NAQP. After transmitting I
suddenly could not hear any sigs. I looked at my P3 and there were plenty
of strong sigs showing up, but I just could not hear them. I tried to tune
around, but could not hear anything. I tried transmitting and SWR seemed
okay. I was at first unsure what to do, but I decided to change bands by
hitting the band button and I believe went down to 30M. I then went right
back up to 20M and AF was restored. After that I resumed the contest with
no problems. I was using LPBridge and running N1MM and my regular logging
program at the same time. Sometimes LPBridge can get hung but that did not
appear to happen this time. Everything has been working normally ever
since.

It was very weird to then see the series of emails regarding this same
phenomenon later in the day! Seems like a firmware bug, but I have not been
able to reproduce it.

Dave, N4QS

----- Original Message -----
From: "Jack Berry" <[hidden email]>
To: "Dave, W8OV" <[hidden email]>
Cc: <[hidden email]>
Sent: Sunday, January 15, 2012 7:40 AM
Subject: Re: [Elecraft] De-sensed K3 after xmit

> Thanks everyone. I'll check AGC and PL-259's today when I get back to the
> shack. I have not (purposefully) touched AGC so it should at default
> settings. Seldom use noise reduction either. I will pay close attention to
> signal strengths as well.
>
> Jack
>
> On Jan 15, 2012, at 7:32 AM, "Dave, W8OV" <[hidden email]> wrote:
>
>> I had a similar problem years ago with other gear. It all went away
>> when I replaced a connector feeding the coax through a wall.
>>
>> --Dave, W8OV
>>
>> On 1/14/2012 9:15 PM, Jack Berry wrote:
>>> Anyone have a similar experience?
>>>
>>> Only occasionally, I notice that when I end a transmission my K3 receive
>>> seems almost muted. It recovers to normal sensitivity very quickly. I
>>> so far see no pattern to the effect that might suggest a cause.
>>>
>>> Thanks,
>>> Jack - WE5ST
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html