AGC and SSB - Low signals after Xmit

I this weekend's NAQP SSB contest, I notice times when the K3 went to receive
the audio volume was low...less signal...but then recovered after a few seconds
or on the next transmission cycle.

Is there something going on with the AGC?  My K3 is very standard...run of the
mill settings....slow AGC...factory settings.  But it seems the receiver did not
come back fast enough after Xmit.

Comments?

Lee - K0WA


 In our day and age it seems that Common Sense is in short supply.  If you don't
have any Common Sense - get some Common Sense and use it.  If you can't find any
Common Sense, ask for help from somebody who has some Common Sense.  Is Common
Sense divine?

Common Sense is the image of the Creator expressing revealed truth in my mind.
-  John W. (Kansas)

Never interfere with anything that isn't bothering you.
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[Bill W4ZV]

Lee Buller wrote

I this weekend's NAQP SSB contest, I notice times when the K3 went to receive
the audio volume was low...less signal...but then recovered after a few seconds
or on the next transmission cycle.

Is there something going on with the AGC?  My K3 is very standard...run of the
mill settings....slow AGC...factory settings.  But it seems the receiver did not
come back fast enough after Xmit.

Was NR enabled?  It can cause problems like this.  BTW I never use Slow AGC in contests...it's best left for leisurely ragchewing.

73,  Bill

[Don Wilhelm-4]

Lee,

Did you have NR turned on?  If so, that is the reason - it takes dome
time to build a filter around a signal.

73,
Don W3FPR

On 1/23/2012 12:44 PM, Lee Buller wrote:

>
> I this weekend's NAQP SSB contest, I notice times when the K3 went to receive
> the audio volume was low...less signal...but then recovered after a few seconds
> or on the next transmission cycle.
>
> Is there something going on with the AGC?  My K3 is very standard...run of the
> mill settings....slow AGC...factory settings.  But it seems the receiver did not
> come back fast enough after Xmit.
>
> Comments?
>
> Lee - K0WA
>
>

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[ab2tc]

Hi,

Did you use slow AGC and was the RX gain still reduced (from a strong RX signal) when you started your transmission? If yes to both, it works as intended. The RX starts back up with the AGC level as it was just before transmission started.

AB2TC - Knut

Lee Buller wrote

I this weekend's NAQP SSB contest, I notice times when the K3 went to receive
the audio volume was low...less signal...but then recovered after a few seconds
or on the next transmission cycle.

Is there something going on with the AGC?  My K3 is very standard...run of the
mill settings....slow AGC...factory settings.  But it seems the receiver did not
come back fast enough after Xmit.

Comments?

Lee - K0WA

<snip>

[David Gilbert]

Same here, and I almost never use slow AGC for anything.  I mistakenly
started the NAQP this weekend with AGC set to slow, but I quickly
realized the problem when the gain wasn't recovering fast enough to
catch the reports of weaker callers ... especially if the AGC had just
been hit hard by QRM or a strong late caller.   Fast AGC worked just fine.

73,
Dave   AB7E



On 1/23/2012 10:55 AM, Bill W4ZV wrote:
> BTW I never use Slow AGC
> in contests...it's best left for leisurely ragchewing.
>
> 73,  Bill
>
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HMMMM.....got some things to try out here....

I will switch from slow to fast AGC.  I am a slow agc user.  Why?  Dunno

I will also check out the outside relay box too.

Lee - K0WA


 In our day and age it seems that Common Sense is in short supply.  If you don't
have any Common Sense - get some Common Sense and use it.  If you can't find any
Common Sense, ask for help from somebody who has some Common Sense.  Is Common
Sense divine?

Common Sense is the image of the Creator expressing revealed truth in my mind.
-  John W. (Kansas)

Never interfere with anything that isn't bothering you.
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[Chester Alderman]

Another option (for contest), in CONFIG, set AGC-S to a higher number.
Setting mine to 75 during contest seemed to remove the recovery delay.

Tom - W4BQF



-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Lee Buller
Sent: Monday, January 23, 2012 2:47 PM
To: Elecraft Reflector
Subject: Re: [Elecraft] AGC and SSB - Low signals after Xmit


HMMMM.....got some things to try out here....

I will switch from slow to fast AGC.  I am a slow agc user.  Why?  Dunno

I will also check out the outside relay box too.

Lee - K0WA


 In our day and age it seems that Common Sense is in short supply.  If you
don't
have any Common Sense - get some Common Sense and use it.  If you can't find
any
Common Sense, ask for help from somebody who has some Common Sense.  Is
Common
Sense divine?

Common Sense is the image of the Creator expressing revealed truth in my
mind.
-  John W. (Kansas)

Never interfere with anything that isn't bothering you.
______________________________________________________________
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[Bill W4ZV]

Tommy Alderman wrote

Another option (for contest), in CONFIG, set AGC-S to a higher number.
Setting mine to 75 during contest seemed to remove the recovery delay.

Tom - W4BQF

AGC-S can only be set as high as 40, so you may be thinking of a different rig (Orion?).  AGC-S in the K3 ranges from 5 to 40 and AGC-F ranges from 80 to 200.  

K0WA never stated whether he had NR activated, which also could have contributed to his problem.  I recently experienced this myself while calling to 4W0VB on 80m and discovered I had accidentally enabled NR instead of disabling NB.

73,  Bill

[Chester Alderman]

Thanks for the correction Bill!

No, it was my fingers not doing what my brain cell was telling them to do.

CORRECTION:  "Setting mine to 35 during contest seemed to remove the
recovery delay."

73,
Tom - W4BQF


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Bill W4ZV
Sent: Monday, January 23, 2012 9:50 PM
To: [hidden email]
Subject: Re: [Elecraft] AGC and SSB - Low signals after Xmit


Tommy Alderman wrote
>
> Another option (for contest), in CONFIG, set AGC-S to a higher number.
> Setting mine to 75 during contest seemed to remove the recovery delay.
>
> Tom - W4BQF
>

AGC-S can only be set as high as 40, so you may be thinking of a different
rig (Orion?).  AGC-S in the K3 ranges from 5 to 40 and AGC-F ranges from 80
to 200.  

K0WA never stated whether he had NR activated, which also could have
contributed to his problem.  I recently experienced this myself while
calling to 4W0VB on 80m and discovered I had accidentally enabled NR instead
of disabling NB.

73,  Bill


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[Guy, K2AV]

I always have my slow AGC set to 40, and I use it almost exclusively in
contests.  Particularly I use it to hold the higher level of the loudest
station calling in a pileup on the monotonic muddle that is lemmings all
calling exactly on a spot frequency.  But I just need it to hang about a
word space on CW, and about a syllable on SSB.  Fast AGC on CW makes the
monotonic lemming muddle far worse.

73, Guy.

On Tue, Jan 24, 2012 at 8:28 AM, Tommy Alderman <[hidden email]>wrote:

> Thanks for the correction Bill!
>
> No, it was my fingers not doing what my brain cell was telling them to do.
>
> CORRECTION:  "Setting mine to 35 during contest seemed to remove the
> recovery delay."
>
> 73,
> Tom - W4BQF
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Bill W4ZV
> Sent: Monday, January 23, 2012 9:50 PM
> To: [hidden email]
> Subject: Re: [Elecraft] AGC and SSB - Low signals after Xmit
>
>
> Tommy Alderman wrote
> >
> > Another option (for contest), in CONFIG, set AGC-S to a higher number.
> > Setting mine to 75 during contest seemed to remove the recovery delay.
> >
> > Tom - W4BQF
> >
>
> AGC-S can only be set as high as 40, so you may be thinking of a different
> rig (Orion?).  AGC-S in the K3 ranges from 5 to 40 and AGC-F ranges from 80
> to 200.
>
> K0WA never stated whether he had NR activated, which also could have
> contributed to his problem.  I recently experienced this myself while
> calling to 4W0VB on 80m and discovered I had accidentally enabled NR
> instead
> of disabling NB.
>
> 73,  Bill
>
>
> --
> View this message in context:
>
> http://elecraft.365791.n2.nabble.com/AGC-and-SSB-Low-signals-after-Xmit-tp72
> 17053p7218883.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
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