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K3 Receiver mush

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Irma & Linas(LY2H)

K3 Receiver mush

Hi everybody,

Following the advice in one of the posts here, I have changed the AGC
settings on my K3+ ( new sync and IO boards as per Elecraft mods kit
turning the old K3 actually into K3S). I've put the AGC THR to 12, AGS SLP
to 8, AGC DCY to SOFT in the Config menu.
Whaw! The efffect was immediate ,very obvious and pleasant! The strong
signals were strong, the weak were weak , but there was no pile-up mush!
What was especially of great importance for me - the long time annoying
problem of receiver hiss and humm when receiving on narrow band 250 Hz
filter was gone! Before, when switching the narrow filter on on weak
signals on the noisy band the signal actually was totally covered by the
increased noise in the filter. I think now it was due to the AGC reacting
to the noise and amplifying it in the narrow band mode because of the too
low AGC THR setting. When the threashhold was increased, the AGC stopped
equalizing the noise and only work on the signal. The result was awsome!
You switch the 250 hz roofing filter on and all the noise and interfering
stns are gone, and the signal you want is there! It could be a very loud
one or a weak one , but it is there and the noise is not!
I recommend everybody to try out this and experiment with the AGC settings
on your K3 radios!
73 de Linas LY2H
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Ed G

Re: K3 Receiver Mush

When I change the AGC settings to those recommended to minimize the mush:

* AGC THR: increase to at least 8

* AGC SLP: decrease to 8 or even less

* AGC DCY = SOFT (not default=NOR).

It seems to my ears that I am hearing louder clicks when the K3 switches
back to receive (CW of course). I know the clicks were a problem lots of
folks commented on a few years ago.

--Ed--

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Vic Rosenthal

Re: K3 Receiver Mush

I had a problem with clicks on return to receive with older firmware,
quite a while back. Make sure you have the latest FW. Wayne fixed a bug
which made a big improvement.

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 22 Feb 2017 22:06, Ed G wrote:

>
> When I change the AGC settings to those recommended to minimize the mush:
>
> * AGC THR: increase to at least 8
>
> * AGC SLP: decrease to 8 or even less
>
> * AGC DCY = SOFT (not default=NOR).
>
> It seems to my ears that I am hearing louder clicks when the K3 switches
> back to receive (CW of course). I know the clicks were a problem lots of
> folks commented on a few years ago.
>
> --Ed--

w0mu

Re: K3 Receiver mush

In reply to this post by Irma & Linas(LY2H)

What happens when you turn the AGC off and ride the rf gain? Do these
setting still have some effect or should they be set up differently?

I assume when you use 12/8/soft most people are using AGC-F?

On 2/22/2017 1:54 PM, Irma Linas wrote:

> Hi everybody,
>
> Following the advice in one of the posts here, I have changed the AGC
> settings on my K3+ ( new sync and IO boards as per Elecraft mods kit
> turning the old K3 actually into K3S). I've put the AGC THR to 12, AGS SLP
> to 8, AGC DCY to SOFT in the Config menu.
> Whaw! The efffect was immediate ,very obvious and pleasant! The strong
> signals were strong, the weak were weak , but there was no pile-up mush!
> What was especially of great importance for me - the long time annoying
> problem of receiver hiss and humm when receiving on narrow band 250 Hz
> filter was gone! Before, when switching the narrow filter on on weak
> signals on the noisy band the signal actually was totally covered by the
> increased noise in the filter. I think now it was due to the AGC reacting
> to the noise and amplifying it in the narrow band mode because of the too
> low AGC THR setting. When the threashhold was increased, the AGC stopped
> equalizing the noise and only work on the signal. The result was awsome!
> You switch the 250 hz roofing filter on and all the noise and interfering
> stns are gone, and the signal you want is there! It could be a very loud
> one or a weak one , but it is there and the noise is not!
> I recommend everybody to try out this and experiment with the AGC settings
> on your K3 radios!
> 73 de Linas LY2H
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

Cady, Fred-2

Re: K3 Receiver mush

http://www.ke7x.com/home/miscellaneous-k3-information/agc-4-51

The transfer characteristic is pretty linear from an input signal of nearly -120 dBm to about -45 dBm with AGC off. Signals above that are being clipped by some other non-linear process, probably the hardware AGC. I don't remember if I had the AF LIM on when I took these data.

Cheers,

Fred KE7X

________________________________
From: Elecraft <[hidden email]> on behalf of W0MU Mike Fatchett <[hidden email]>
Sent: Thursday, February 23, 2017 9:08 AM
To: [hidden email]
Subject: Re: [Elecraft] K3 Receiver mush

What happens when you turn the AGC off and ride the rf gain? Do these
setting still have some effect or should they be set up differently?

I assume when you use 12/8/soft most people are using AGC-F?

On 2/22/2017 1:54 PM, Irma Linas wrote:

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Joe Subich, W4TV-4

Re: K3 Receiver mush

The hardware AGC engages at about -45 (S9 + 20 dB). That is most
certainly the final flattening you are seeing in the transfer
characteristic.

Otherwise the slope for each slp setting will generate roughly parallel
transfer curves from the threshold point (witness the parallel curves
for all of the SLP 15 cases as well as for Thr 8, SLP 7 and THR 15,
SLP 7). K8ZOA produced similar curves showing parallel behavior with
SLP held constant as the threshold is changed. See:
<http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm>

Jack also derived charts showing the change in output (audio) level
per 10 dB of input (RF) level for each value of slope (SLP) and the
signal level for AGC Threshold (THR). That information can be found
in the same article. Unfortunately, Jack's data is from very early
firmware and was not repeated after the firmware was never updated to
include values for THR greater than 8.

73,

... Joe, W4TV

On 2/23/2017 2:58 PM, Cady, Fred wrote:

> http://www.ke7x.com/home/miscellaneous-k3-information/agc-4-51
>
>
> The transfer characteristic is pretty linear from an input signal of nearly -120 dBm to about -45 dBm with AGC off. Signals above that are being clipped by some other non-linear process, probably the hardware AGC. I don't remember if I had the AF LIM on when I took these data.
>
> Cheers,
>
> Fred KE7X
>
>
>
> ________________________________
> From: Elecraft <[hidden email]> on behalf of W0MU Mike Fatchett <[hidden email]>
> Sent: Thursday, February 23, 2017 9:08 AM
> To: [hidden email]
> Subject: Re: [Elecraft] K3 Receiver mush
>
> What happens when you turn the AGC off and ride the rf gain? Do these
> setting still have some effect or should they be set up differently?
>
> I assume when you use 12/8/soft most people are using AGC-F?
>
>
> On 2/22/2017 1:54 PM, Irma Linas wrote:
>> Hi everybody,
>>
>> Following the advice in one of the posts here, I have changed the AGC
>> settings on my K3+ ( new sync and IO boards as per Elecraft mods kit
>> turning the old K3 actually into K3S). I've put the AGC THR to 12, AGS SLP
>> to 8, AGC DCY to SOFT in the Config menu.
>> Whaw! The efffect was immediate ,very obvious and pleasant! The strong
>> signals were strong, the weak were weak , but there was no pile-up mush!
>> What was especially of great importance for me - the long time annoying
>> problem of receiver hiss and humm when receiving on narrow band 250 Hz
>> filter was gone! Before, when switching the narrow filter on on weak
>> signals on the noisy band the signal actually was totally covered by the
>> increased noise in the filter. I think now it was due to the AGC reacting
>> to the noise and amplifying it in the narrow band mode because of the too
>> low AGC THR setting. When the threashhold was increased, the AGC stopped
>> equalizing the noise and only work on the signal. The result was awsome!
>> You switch the 250 hz roofing filter on and all the noise and interfering
>> stns are gone, and the signal you want is there! It could be a very loud
>> one or a weak one , but it is there and the noise is not!
>> I recommend everybody to try out this and experiment with the AGC settings
>> on your K3 radios!
>> 73 de Linas LY2H
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
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>
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>
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>

Bob Wilson, N6TV

Re: K3 Receiver mush

In reply to this post by w0mu

w0mu wrote

What happens when you turn the AGC off and ride the rf gain? Do these setting still have some effect or should they be set up differently? I assume when you use 12/8/soft most people are using AGC-F?

Ken,

When you experienced the mush, did you have the AGC ON, but the RF Gain set to max, as most people usually do with any other modern radio? In my experience, setting RF GAIN max will cause unacceptable pileup mush in the K3, even if you use optimal AGC settings.

When you can't pull apart a pileup, just back off the RF Gain until some stations start to stand out. You can leave the AGC ON all the time.

For reference, here are my preferred AGC and other settings for contesting with a K3 and large CW pileups. Others have also reported success with these.

First, set CONFIG:TECH MD ON to un-hide some AGC settings. Set CONFIG:TECH MD OFF when finished, to eliminate distracting values from accidentally appearing in the SubRx display (PLL1, AFV, dBV, etc.)

AF GAIN LO -- Cuts audio hiss. May not work with all headphones. OK on Heil.
AF LIM 20 -- Only takes affect when AGC is OFF (rarely used)
AGC DCY Soft -- Reduces AGC-induced IMD, recommended for pileups
AGC HLD 0.05 -- Slow AGC hold time (50 ms). Reduces AGC-induced IMD, recommended for pileups. Works with AGC-S only, no affect when using AGC-F.
AGC PLS NOR -- Loud static pulses do not pump AGC
AGC SLP 010 -- A pretty "flat" AGC response curve. I may move this lower since pileups of loud guys can blend together, but I like this setting because it saves my ears.
AGC THR 010 -- AGC kicks in at about S-8. Signals lower than THR behave as they would with AGC OFF ( +1 dB of RF = +1 dB of audio)
AGC -F 120 -- Factory default fast AGC decay rate (recovery time). Higher = faster. Faster can be bad.
AGC -S 20 -- Factory default slow AGC decay rate (recovery time). Higher = faster. Faster can be bad.

RF GAIN at 3 O'Clock or less except when all signals and band noise are very low (e.g. 10m)
AF GAIN never higher than 3 O'Clock

AFX OFF
NR OFF
NB OFF
RIT OFF
XIT OFF

FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider or narrower.

Use AGC-F or AGC-S for CW, whatever works best for you.
Use AGC-S for SSB.
CW Pitch 500 (or to taste)
IF shift centered (on CW)
500 Hz InRad 8-pole filter on CW
2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, must move IF SHIFT lower for pleasing audio)
Use XFIL button to toggle between filters and reset the IF shift, rather than NOR (hold) button

PREamp ON for 15m and up, PREamp OFF for all other bands

Hope this helps.

73,
Bob, N6TV

Jim Brown-10

Re: K3 Receiver mush

On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
> For reference, here are my preferred AGC and other settings for contesting with a K3 and large CW pileups.

Bob's a great op, so I really appreciate seeing his settings. But
they're all run together in his email with no paragraphs or punctuation,
so it's very hard to read. I copied his settings into a word processor
and added paragraphs.

73, Jim K9YC

- - - - - - -

First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set
CONFIG:TECH MD OFF when finished, to eliminate distracting values from
accidentally appearing in the SubRx display (PLL1, AFV, dBV, etc.)

*AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on Heil.

*AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)

*AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups

*AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
recommended for pileups.Works with AGC-S only, no affect when using AGC-F.

*AGC PLS NOR* -- Loud static pulses do not pump AGC

*AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this lower
since pileups of loud guys can blend together, but I like this setting
because it saves my ears.

*AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR behave
as they would with AGC OFF ( +1 dB of RF = +1 dB of audio)

*AGC -F 120* -- Factory default fast AGC decay rate (recovery
time).Higher = faster.Faster can be bad.

*AGC –S 20*-- Factory default slow AGC decay rate (recovery time).Higher
= faster.Faster can be bad.

*RF GAIN at 3 O'Clock or less* except when all signals and band noise
are very low (e.g. 10m)

*AF GAIN* never higher than 3 O'Clock

*AFX OFF*

*NR OFF*

*NB OFF*

*RIT OFF*

*XIT OFF*

FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider
or narrower.

Use *AGC-F* or *AGC-S* for CW, whatever works best for you.

Use *AGC-S* for SSB.

CW Pitch 500 (or to taste), IF shift centered (on CW)

500 Hz InRad 8-pole filter on CW

2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move
IF SHIFT lower for pleasing audio*)

Use *XFIL* button to toggle between filters and reset the IF shift,
rather than NOR (hold) button

*PREamp ON* for 15m and up, *PREamp OFF* for all other bands

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Bob Wilson, N6TV

Re: K3 Receiver mush

On Fri, Feb 24, 2017 at 10:54 AM, Jim Brown <[hidden email]>
wrote:

> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>
>> For reference, here are my preferred AGC and other settings for
>> contesting with a K3 and large CW pileups.
>>
>
> Bob's a great op, so I really appreciate seeing his settings. But they're
> all run together in his email with no paragraphs or punctuation, so it's
> very hard to read. I copied his settings into a word processor and added
> paragraphs.

Thanks Jim,

I'm new to this reflector, so I'm puzzled by the misformatting. I made my
post using the web interface (Nabble), carefully formatting the HTML with
the supplied editor. It looked fine in Preview, and still looks good in
the "View this message in context" HTML link at the bottom of the email,
but it really looks awful in the plain text email.

Try this:

http://elecraft.365791.n2.nabble.com/K3-Receiver-mush-td7627277.html#a7627323

Some may want to bookmark this direct link above

73,
Bob, N6TV
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Matt Zilmer-3

Re: K3 Receiver mush

The problem might be that the reflector doesn't pass HTML, just text.
I'm not sure about this, but remember reading it somewhere.

73,

matt W6NIA

On 2/24/2017 11:31 AM, Bob Wilson, N6TV wrote:

> On Fri, Feb 24, 2017 at 10:54 AM, Jim Brown <[hidden email]>
> wrote:
>
>> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>>
>>> For reference, here are my preferred AGC and other settings for
>>> contesting with a K3 and large CW pileups.
>>>
>> Bob's a great op, so I really appreciate seeing his settings. But they're
>> all run together in his email with no paragraphs or punctuation, so it's
>> very hard to read. I copied his settings into a word processor and added
>> paragraphs.
>
> Thanks Jim,
>
> I'm new to this reflector, so I'm puzzled by the misformatting. I made my
> post using the web interface (Nabble), carefully formatting the HTML with
> the supplied editor. It looked fine in Preview, and still looks good in
> the "View this message in context" HTML link at the bottom of the email,
> but it really looks awful in the plain text email.
>
> Try this:
>
> http://elecraft.365791.n2.nabble.com/K3-Receiver-mush-td7627277.html#a7627323
>
> Some may want to bookmark this direct link above
>
> 73,
> Bob, N6TV
> ______________________________________________________________
> Elecraft mailing list
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> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

--
Pull the curtain, Fred. It won't be long now.

Matt Zilmer, W6NIA
[Shiraz]

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Don Wilhelm

Re: K3 Receiver mush

In reply to this post by Jim Brown-10

That is a very good list to combat crowded band conditions and allow
copy of weak signals near stronger signals.

For the last few items on that list, you may want to consider
alternatives for selecting the filters and the use of SHIFT. It is a
matter of "operating style" - I know Bob is comfortable with his, but I
would like to present something a bit different for those not yet
'ingrained' in their operating habits.

If you use the SHIFT and WIDTH knobs in CW, the filters will change as
you move the WIDTH knob - this is an alternative to using the XFIL
button. Only seldom do you have touch the shift, but it may be handy
for moving an offending signal out of the passband. Normally SHIFT
would be set to your preferred sidetone pitch.

For SSB, tap the SHIFT or WIDTH knob to get the LO CUT/HI Cut LEDs to
illuminate - then you can narrow the passband with the LO CUT and HI CUT
knobs - no need to change the SHIFT for pleasing audio, it will happen
automatically.

You cannot cut the LO end drastically (only up to about 550Hz) before
the signal intelligibility is affected, but you can cut the HI end
substantially (down to about 1500Hz) before the signal becomes unreadable.

I find this method much easier than fiddling with the SHIFT in SSB and
the XFIL button. I never touch the XFIL button, the filters follow the
width of the DSP no matter what the mode.

73,
Don W3FPR

On 2/24/2017 1:54 PM, Jim Brown wrote:
> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>
> 2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move
> IF SHIFT lower for pleasing audio*)
>
> Use *XFIL* button to toggle between filters and reset the IF shift,
> rather than NOR (hold) button
>
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Charlie T, K3ICH

Re: K3 Receiver mush

In reply to this post by Bob Wilson, N6TV

My email from Jim has each parameter on a separate line with double spacing
between each descriptive comment.

It looks fine on my printer.

73, Charlie k3ICH

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Bob
Wilson, N6TV
Sent: Friday, February 24, 2017 2:32 PM
To: Elecraft Reflector <[hidden email]>
Subject: Re: [Elecraft] K3 Receiver mush

On Fri, Feb 24, 2017 at 10:54 AM, Jim Brown <[hidden email]>
wrote:

> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>
>> For reference, here are my preferred AGC and other settings for
>> contesting with a K3 and large CW pileups.
>>
>
> Bob's a great op, so I really appreciate seeing his settings. But
> they're all run together in his email with no paragraphs or
> punctuation, so it's very hard to read. I copied his settings into a
> word processor and added paragraphs.

Thanks Jim,

I'm new to this reflector, so I'm puzzled by the misformatting. I made my
post using the web interface (Nabble), carefully formatting the HTML with
the supplied editor. It looked fine in Preview, and still looks good in the
"View this message in context" HTML link at the bottom of the email, but it
really looks awful in the plain text email.

Try this:

http://elecraft.365791.n2.nabble.com/K3-Receiver-mush-td7627277.html#a762732
3

Some may want to bookmark this direct link above

73,
Bob, N6TV
______________________________________________________________
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delivered to [hidden email]

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Ed Muns

Re: K3 Receiver mush

In reply to this post by Jim Brown-10

I concur with most, but not all, of N6TV's recommendations below. If we all
agreed on all the CONFIG parameters they wouldn't need to be variable!

One that I particularly disagree with is how to narrow the IF bandwidth in
SSB mode. The recommendation to narrow the bandwidth and then lower the IF
Shift is unnecessarily cumbersome on SSB. After going through these
gyrations, you'll find that the LO CUT is where it was before you started.
So, all that needs to be done to narrow the SSB IF bandwidth is simply
decrease HI CUT. One quick, easy operation and the audio is entirely
intelligible throughout the adjustment.

Ed W0YK
_______________________________________________________________________

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Jim
Brown
Sent: 24 February, 2017 10:54
To: [hidden email]
Subject: Re: [Elecraft] K3 Receiver mush

On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
> For reference, here are my preferred AGC and other settings for contesting
with a K3 and large CW pileups.

Bob's a great op, so I really appreciate seeing his settings. But
they're all run together in his email with no paragraphs or punctuation,
so it's very hard to read. I copied his settings into a word processor
and added paragraphs.

73, Jim K9YC

- - - - - - -

First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set
CONFIG:TECH MD OFF when finished, to eliminate distracting values from
accidentally appearing in the SubRx display (PLL1, AFV, dBV, etc.)

*AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on Heil.

*AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)

*AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups

*AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
recommended for pileups.Works with AGC-S only, no affect when using AGC-F.

*AGC PLS NOR* -- Loud static pulses do not pump AGC

*AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this lower
since pileups of loud guys can blend together, but I like this setting
because it saves my ears.

*AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR behave
as they would with AGC OFF ( +1 dB of RF = +1 dB of audio)

*AGC -F 120* -- Factory default fast AGC decay rate (recovery
time).Higher = faster.Faster can be bad.

*AGC -S 20*-- Factory default slow AGC decay rate (recovery time).Higher
= faster.Faster can be bad.

*RF GAIN at 3 O'Clock or less* except when all signals and band noise
are very low (e.g. 10m)

*AF GAIN* never higher than 3 O'Clock

*AFX OFF*

*NR OFF*

*NB OFF*

*RIT OFF*

*XIT OFF*

FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider
or narrower.

Use *AGC-F* or *AGC-S* for CW, whatever works best for you.

Use *AGC-S* for SSB.

CW Pitch 500 (or to taste), IF shift centered (on CW)

500 Hz InRad 8-pole filter on CW

2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move
IF SHIFT lower for pleasing audio*)

Use *XFIL* button to toggle between filters and reset the IF shift,
rather than NOR (hold) button

*PREamp ON* for 15m and up, *PREamp OFF* for all other bands

______________________________________________________________
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w0mu

Re: K3 Receiver mush

In reply to this post by Jim Brown-10

I generally run AGC off and the rf gain is never fully open. I will
continue to play with settings.

My settings were fairly close but I will try these.

Thanks for the guide!

W0MU

On 2/24/2017 12:54 PM, Jim Brown wrote:

> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>> For reference, here are my preferred AGC and other settings for
>> contesting with a K3 and large CW pileups.
>
> Bob's a great op, so I really appreciate seeing his settings. But
> they're all run together in his email with no paragraphs or
> punctuation, so it's very hard to read. I copied his settings into a
> word processor and added paragraphs.
>
> 73, Jim K9YC
>
> - - - - - - -
>
> First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set
> CONFIG:TECH MD OFF when finished, to eliminate distracting values from
> accidentally appearing in the SubRx display (PLL1, AFV, dBV, etc.)
>
> *AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on
> Heil.
>
> *AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)
>
> *AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups
>
> *AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
> recommended for pileups.Works with AGC-S only, no affect when using
> AGC-F.
>
> *AGC PLS NOR* -- Loud static pulses do not pump AGC
>
> *AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this
> lower since pileups of loud guys can blend together, but I like this
> setting because it saves my ears.
>
> *AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR
> behave as they would with AGC OFF ( +1 dB of RF = +1 dB of audio)
>
> *AGC -F 120* -- Factory default fast AGC decay rate (recovery
> time).Higher = faster.Faster can be bad.
>
> *AGC –S 20*-- Factory default slow AGC decay rate (recovery
> time).Higher = faster.Faster can be bad.
>
> *RF GAIN at 3 O'Clock or less* except when all signals and band noise
> are very low (e.g. 10m)
>
> *AF GAIN* never higher than 3 O'Clock
>
> *AFX OFF*
>
> *NR OFF*
>
> *NB OFF*
>
> *RIT OFF*
>
> *XIT OFF*
>
>
> FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider
> or narrower.
>
> Use *AGC-F* or *AGC-S* for CW, whatever works best for you.
>
> Use *AGC-S* for SSB.
>
> CW Pitch 500 (or to taste), IF shift centered (on CW)
>
> 500 Hz InRad 8-pole filter on CW
>
> 2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must
> move IF SHIFT lower for pleasing audio*)
>
> Use *XFIL* button to toggle between filters and reset the IF shift,
> rather than NOR (hold) button
>
> *PREamp ON* for 15m and up, *PREamp OFF* for all other bands
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

N2TK

Re: K3 Receiver mush

In reply to this post by Ed Muns

I concur Ed. On SSB when running stations I will only mess with the HI CUT.
Wil crank it down to 2.1. The intelligibility is still good. Sometimes I
forget and just leave it at that setting for the entire contest. It makes it
so you can squeeze in between two other strong stations so that all three
can keep running. Will give it a go again next weekend at KP2M with K3 #311.

73,
N2TK, Tony

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Ed
Muns
Sent: Friday, February 24, 2017 7:14 PM
To: [hidden email]
Subject: Re: [Elecraft] K3 Receiver mush

I concur with most, but not all, of N6TV's recommendations below. If we all
agreed on all the CONFIG parameters they wouldn't need to be variable!

One that I particularly disagree with is how to narrow the IF bandwidth in
SSB mode. The recommendation to narrow the bandwidth and then lower the IF
Shift is unnecessarily cumbersome on SSB. After going through these
gyrations, you'll find that the LO CUT is where it was before you started.
So, all that needs to be done to narrow the SSB IF bandwidth is simply
decrease HI CUT. One quick, easy operation and the audio is entirely
intelligible throughout the adjustment.

Ed W0YK
_______________________________________________________________________

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Jim
Brown
Sent: 24 February, 2017 10:54
To: [hidden email]
Subject: Re: [Elecraft] K3 Receiver mush

On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
> For reference, here are my preferred AGC and other settings for
> contesting
with a K3 and large CW pileups.

Bob's a great op, so I really appreciate seeing his settings. But they're
all run together in his email with no paragraphs or punctuation, so it's
very hard to read. I copied his settings into a word processor and added
paragraphs.

73, Jim K9YC

- - - - - - -

First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set CONFIG:TECH
MD OFF when finished, to eliminate distracting values from accidentally
appearing in the SubRx display (PLL1, AFV, dBV, etc.)

*AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on Heil.

*AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)

*AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups

*AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
recommended for pileups.Works with AGC-S only, no affect when using AGC-F.

*AGC PLS NOR* -- Loud static pulses do not pump AGC

*AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this lower
since pileups of loud guys can blend together, but I like this setting
because it saves my ears.

*AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR behave as
they would with AGC OFF ( +1 dB of RF = +1 dB of audio)

*AGC -F 120* -- Factory default fast AGC decay rate (recovery time).Higher =
faster.Faster can be bad.

*AGC -S 20*-- Factory default slow AGC decay rate (recovery time).Higher =
faster.Faster can be bad.

*RF GAIN at 3 O'Clock or less* except when all signals and band noise are
very low (e.g. 10m)

*AF GAIN* never higher than 3 O'Clock

*AFX OFF*

*NR OFF*

*NB OFF*

*RIT OFF*

*XIT OFF*

FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider or
narrower.

Use *AGC-F* or *AGC-S* for CW, whatever works best for you.

Use *AGC-S* for SSB.

CW Pitch 500 (or to taste), IF shift centered (on CW)

500 Hz InRad 8-pole filter on CW

2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move IF
SHIFT lower for pleasing audio*)

Use *XFIL* button to toggle between filters and reset the IF shift, rather
than NOR (hold) button

*PREamp ON* for 15m and up, *PREamp OFF* for all other bands

______________________________________________________________
Elecraft mailing list
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Help: http://mailman.qth.net/mmfaq.htm
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pa0pje

Re: K3 Receiver mush

In reply to this post by Matt Zilmer-3

You are right, Matt.
No HTML, no attachments
73,
Peter - PA0PJE

Op 24-02-17 om 20:42 schreef Matt Zilmer:
> The problem might be that the reflector doesn't pass HTML, just text.
> I'm not sure about this, but remember reading it somewhere.
>
> 73,
>
> matt W6NIA
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Ted Bryant

Re: K3 Receiver mush

In reply to this post by Jim Brown-10

In playing with Bob N6TV's suggested settings, I've discovered that on CW,
neither the Shift->LO Cut nor the Width->HI Cut controls change functions
when tapped. They appear fixed at SHIFT and WIDTH. Tapping them merely
displays their current setting. On SSB, they change and work as expected.
Is there a parameter setting somewhere that affects this? I've looked
through the release notes but see nothing.

Using the latest firmware: 5.57

73, Ted W4NZ

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Jim
Brown
Sent: Friday, February 24, 2017 1:54 PM
To: [hidden email]
Subject: Re: [Elecraft] K3 Receiver mush

On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
> For reference, here are my preferred AGC and other settings for contesting
with a K3 and large CW pileups.

Bob's a great op, so I really appreciate seeing his settings. But they're
all run together in his email with no paragraphs or punctuation, so it's
very hard to read. I copied his settings into a word processor and added
paragraphs.

73, Jim K9YC

- - - - - - -

First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set CONFIG:TECH
MD OFF when finished, to eliminate distracting values from accidentally
appearing in the SubRx display (PLL1, AFV, dBV, etc.)

*AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on Heil.

*AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)

*AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups

*AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
recommended for pileups.Works with AGC-S only, no affect when using AGC-F.

*AGC PLS NOR* -- Loud static pulses do not pump AGC

*AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this lower
since pileups of loud guys can blend together, but I like this setting
because it saves my ears.

*AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR behave as
they would with AGC OFF ( +1 dB of RF = +1 dB of audio)

*AGC -F 120* -- Factory default fast AGC decay rate (recovery time).Higher =
faster.Faster can be bad.

*AGC -S 20*-- Factory default slow AGC decay rate (recovery time).Higher =
faster.Faster can be bad.

*RF GAIN at 3 O'Clock or less* except when all signals and band noise are
very low (e.g. 10m)

*AF GAIN* never higher than 3 O'Clock

*AFX OFF*

*NR OFF*

*NB OFF*

*RIT OFF*

*XIT OFF*

FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider or
narrower.

Use *AGC-F* or *AGC-S* for CW, whatever works best for you.

Use *AGC-S* for SSB.

CW Pitch 500 (or to taste), IF shift centered (on CW)

500 Hz InRad 8-pole filter on CW

2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move IF
SHIFT lower for pleasing audio*)

Use *XFIL* button to toggle between filters and reset the IF shift, rather
than NOR (hold) button

*PREamp ON* for 15m and up, *PREamp OFF* for all other bands

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Joe Subich, W4TV-4

Re: K3 Receiver mush

Do you have QRQ mode selected (+ showing in the display)?

From the Owner's Manual, page 54: > Filter passband SHIFT/LOCUT/HICUT
cannot be used when CW QRQ is in
> effect.

73,

... Joe, W4TV

On 2/26/2017 10:13 AM, Ted Bryant wrote:

> In playing with Bob N6TV's suggested settings, I've discovered that on CW,
> neither the Shift->LO Cut nor the Width->HI Cut controls change functions
> when tapped. They appear fixed at SHIFT and WIDTH. Tapping them merely
> displays their current setting. On SSB, they change and work as expected.
> Is there a parameter setting somewhere that affects this? I've looked
> through the release notes but see nothing.
>
> Using the latest firmware: 5.57
>
> 73, Ted W4NZ
>
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of Jim
> Brown
> Sent: Friday, February 24, 2017 1:54 PM
> To: [hidden email]
> Subject: Re: [Elecraft] K3 Receiver mush
>
> On Thu,2/23/2017 6:32 PM, Bob Wilson, N6TV wrote:
>> For reference, here are my preferred AGC and other settings for contesting
> with a K3 and large CW pileups.
>
> Bob's a great op, so I really appreciate seeing his settings. But they're
> all run together in his email with no paragraphs or punctuation, so it's
> very hard to read. I copied his settings into a word processor and added
> paragraphs.
>
> 73, Jim K9YC
>
> - - - - - - -
>
> First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set CONFIG:TECH
> MD OFF when finished, to eliminate distracting values from accidentally
> appearing in the SubRx display (PLL1, AFV, dBV, etc.)
>
> *AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on Heil.
>
> *AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)
>
> *AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups
>
> *AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
> recommended for pileups.Works with AGC-S only, no affect when using AGC-F.
>
> *AGC PLS NOR* -- Loud static pulses do not pump AGC
>
> *AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this lower
> since pileups of loud guys can blend together, but I like this setting
> because it saves my ears.
>
> *AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR behave as
> they would with AGC OFF ( +1 dB of RF = +1 dB of audio)
>
> *AGC -F 120* -- Factory default fast AGC decay rate (recovery time).Higher =
> faster.Faster can be bad.
>
> *AGC -S 20*-- Factory default slow AGC decay rate (recovery time).Higher =
> faster.Faster can be bad.
>
> *RF GAIN at 3 O'Clock or less* except when all signals and band noise are
> very low (e.g. 10m)
>
> *AF GAIN* never higher than 3 O'Clock
>
> *AFX OFF*
>
> *NR OFF*
>
> *NB OFF*
>
> *RIT OFF*
>
> *XIT OFF*
>
>
> FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider or
> narrower.
>
> Use *AGC-F* or *AGC-S* for CW, whatever works best for you.
>
> Use *AGC-S* for SSB.
>
> CW Pitch 500 (or to taste), IF shift centered (on CW)
>
> 500 Hz InRad 8-pole filter on CW
>
> 2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move IF
> SHIFT lower for pleasing audio*)
>
> Use *XFIL* button to toggle between filters and reset the IF shift, rather
> than NOR (hold) button
>
> *PREamp ON* for 15m and up, *PREamp OFF* for all other bands
>
> ______________________________________________________________
> 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 Message
> delivered to [hidden email]
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

Ken Wagner K3IU

Re: K3 Receiver mush

In reply to this post by Jim Brown-10

I am using 5.57 here and tapping either the shift or width
knobs causes the function to cycle between Lo/HI and
Shift/Width with the Green LEDs to switch as well.
73, Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On 2/26/2017 10:13 AM, Ted Bryant wrote:

Ted Bryant

Re: K3 Receiver mush

In reply to this post by Joe Subich, W4TV-4

Thanks Joe, Randy and Ken. But the CW QRQ says it is OFF. There is no "+"
showing, either.

73, Ted W4NZ

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Joe
Subich, W4TV
Sent: Sunday, February 26, 2017 10:29 AM
To: [hidden email]
Subject: Re: [Elecraft] K3 Receiver mush

Do you have QRQ mode selected (+ showing in the display)?

From the Owner's Manual, page 54: > Filter passband SHIFT/LOCUT/HICUT
cannot be used when CW QRQ is in
> effect.

73,

... Joe, W4TV

On 2/26/2017 10:13 AM, Ted Bryant wrote:

contesting

> with a K3 and large CW pileups.
>
> Bob's a great op, so I really appreciate seeing his settings. But they're
> all run together in his email with no paragraphs or punctuation, so it's
> very hard to read. I copied his settings into a word processor and added
> paragraphs.
>
> 73, Jim K9YC
>
> - - - - - - -
>
> First, set *CONFIG:TECH MD ON* to un-hide some AGC settings.Set

CONFIG:TECH
> MD OFF when finished, to eliminate distracting values from accidentally
> appearing in the SubRx display (PLL1, AFV, dBV, etc.)
>
> *AF GAIN LO* -- Cuts audio hiss.May not work with all headphones.OK on
Heil.

>
> *AF LIM 20* -- Only takes effect when AGC is OFF (rarely used)
>
> *AGC DCY Soft* -- Reduces AGC-induced IMD, recommended for pileups
>
> *AGC HLD 0.05* -- Slow AGC hold time (50 ms).Reduces AGC-induced IMD,
> recommended for pileups.Works with AGC-S only, no affect when using AGC-F.
>
> *AGC PLS NOR* -- Loud static pulses do not pump AGC
>
> *AGC SLP 010*-- A pretty "flat" AGC response curve.I may move this lower
> since pileups of loud guys can blend together, but I like this setting
> because it saves my ears.
>
> *AGC THR 010* -- AGC kicks in at about S-8.Signals lower than THR behave

as
> they would with AGC OFF ( +1 dB of RF = +1 dB of audio)
>
> *AGC -F 120* -- Factory default fast AGC decay rate (recovery time).Higher
=

> faster.Faster can be bad.
>
> *AGC -S 20*-- Factory default slow AGC decay rate (recovery time).Higher =
> faster.Faster can be bad.
>
> *RF GAIN at 3 O'Clock or less* except when all signals and band noise are
> very low (e.g. 10m)
>
> *AF GAIN* never higher than 3 O'Clock
>
> *AFX OFF*
>
> *NR OFF*
>
> *NB OFF*
>
> *RIT OFF*
>
> *XIT OFF*
>
>
> FL1 to FL5 BW set to match labeled filter bandwidth exactly, not wider or
> narrower.
>
> Use *AGC-F* or *AGC-S* for CW, whatever works best for you.
>
> Use *AGC-S* for SSB.
>
> CW Pitch 500 (or to taste), IF shift centered (on CW)
>
> 500 Hz InRad 8-pole filter on CW
>
> 2.8 kHz 8-pole filter on SSB (1.8 8-pole when bands crowded, *must move IF
> SHIFT lower for pleasing audio*)
>
> Use *XFIL* button to toggle between filters and reset the IF shift, rather
> than NOR (hold) button
>
> *PREamp ON* for 15m and up, *PREamp OFF* for all other bands
>
> ______________________________________________________________
> 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

Message

> delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
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> 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
> Message delivered to [hidden email]
>