[Elecraft] [K3] Sticky NTCH and Auto SPOT failure

[ok1rp]

Hi all,

I am sending my apologize for maybe stupid questions... but I am interesting
in you opinion and comments please.

Is there possibility to set sticky notch filter (NTCH) in general at least
or even better per band please? I am really worried to set NTCH always again
after turning K3 on. I did not found it in manual... maybe my eyes getting
worse. :( (latest f/w and f/p used) 

Also I realized that Auto SPOT in CWT mode is failing when manual NTCH is
used. I am using NCTH set to 540Hz quite often (according to my low pitch at
450Hz or lower) and I realized that in that case the Auto SPOT function is
not working properly. Is it normal because of math or is it my issue only?
(hope not...:)

Thanks for your time,

73 - Petr, OK1RP




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[Elecraft] KX3 VFO a knob not working

[Gregory Brown]

This morning the main knob on my KX3 stopped responding.  It doesn't tune
frequencies or menu settings.

It was working fine an hour ago.

Any ideas?

Greg
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Re: [Elecraft] KX3 VFO a knob not working

[GRANT YOUNGMAN]

Did you possibly “lock” the tuning?  Tapping RATE will unlock it if you did.

Grant NQ5T


> On Oct 27, 2015, at 10:44 AM, Gregory Brown  wrote:
> 
> This morning the main knob on my KX3 stopped responding.  It doesn't tune
> frequencies or menu settings.
> 
> It was working fine an hour ago.
> 
> Any ideas?
> 

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Re: [Elecraft] KX3 VFO a knob not working

[Charlie T, K3ICH]

Please let us all know if that fixes it.  
We promise not to laugh as we all have done similar things and 
we feel so much better when someone ELSE does them too  (HI).

Charlie k3ICH

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of GRANT 
YOUNGMAN
Sent: Tuesday, October 27, 2015 12:08 PM
To: Gregory Brown 
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 VFO a knob not working

Did you possibly “lock” the tuning?  Tapping RATE will unlock it if you did.

Grant NQ5T


> On Oct 27, 2015, at 10:44 AM, Gregory Brown  wrote:
> 
> This morning the main knob on my KX3 stopped responding.  It doesn't 
> tune frequencies or menu settings.
> 
> It was working fine an hour ago.
> 
> Any ideas?
> 

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Re: [Elecraft] Issue Resolved K3 Voltage on TX

[Bill W4ZV]

If you operate SSB, you might want to run higher voltage at the K3 terminals
(e.g. at 14.5V which is below the 15.0V spec) to minimize IMD.  This was
discussed extensively in 2009 but the following by W4TV is a good summary:


> Is there something critical in the radio that 
> gives this outcome? Critical adjustment perhaps? 
> Is it very sensitive what PS we use (ala W4ZV)? 

Yes, it is very sensitive to power supply voltage. 
Look at any of the application notes - the one 
Craig mentions for the P-P RD100HHF FETs is a 
good example.  Decreasing Vcc (or Vdd) by just
one Volt will increase the IMD at 100 Watts by 
10 dB and decrease the maximum output power by 
almost 20 Watts.   

Running the power supply at 14.0 - 14.5 Volts and 
using a power supply with good dynamic regulation 
will go a long way to keeping the K3 "clean." 
#




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Re: [Elecraft] Issue Resolved K3 Voltage on TX

[Jim Brown]

On Tue,10/27/2015 8:46 AM, Bill W4ZV wrote:

If you operate SSB, you might want to run higher voltage at the K3 terminals
(e.g. at 14.5V which is below the 15.0V spec) to minimize IMD.


IMD is just as much a factor on CW as on SSB. CW is really 100% AM of a 
carrier by a square wave, which we all know is a lot of AF harmonics, 
the strength of which is dependent on the rise and fall time of the 
keying waveform. IMD is clearly visible in the sidebands of CW signals 
on a spectrum display set for very good frequency resolution -- like a 
P3, and especially a P3 with SVGA.


Take a look at http://k9yc.com/P3_Spectrum_Measurements.pdf

These data are with power supply voltage in the range of 12.5V.

73, Jim K9YC
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[Elecraft] WØO HALLOWEEN FROM FRANKENSTEIN, MISSOURI

[KENT TRIMBLE]

Elecraft friends. . .

Look for the Mid-MO Amateur Radio Club's annual "Halloween 
Funexpedition" from Frankenstein, Missouri.


Begins 1900 GMT Saturday, October 31st.

May run all night, may not (we're getting old).  Possible operations 
Sunday morning.


As best we can determine, Missouri has the /only /incorporated 
"Frankenstein" in the continental United States.


Two K3 rigs, one each on CW and SSB, running 100 watts to dipole 
antennas at 30 feet.


Be patient with us, operator skills will vary.  We're trying to involve 
newly licensed hams this year.


QSL information (read it carefully) can be found at the "WØO" listing on 
QRZ.COM.


Bands will be 80-40-20 with higher bands dependent on propagation.

Frequencies . . . who knows.  That's what P3s and PX3s are for (and 
spotting sites).


73,

Kent Trimble, K9ZTV
Special Event Chairman
Mid-MO Amateur Radio Club
Jefferson City, Missouri


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Re: [Elecraft] KX3 VFO a knob not working

[Gregory Brown]

Haha.  No I'm not in lock mode.  That was the first thing I checked!

Greg KE4PDG

On Tue, Oct 27, 2015 at 8:44 AM, Gregory Brown 
wrote:

> This morning the main knob on my KX3 stopped responding.  It doesn't tune
> frequencies or menu settings.
>
> It was working fine an hour ago.
>
> Any ideas?
>
> Greg
>
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[Elecraft] K3S In-Depth Review Coming Soon?

[Paul Clay via Elecraft]

I was wondering if and when a full-on review of the K3S would be forthcoming.  
I'm a bit surprised that following its release there hasn't been a lot of 
reviews posted (certainly no comparison to the number of reviews that followed 
the release of the original K3).  A comprehensive review of the K3S, 
particularly with reference to the original K3, would help me to decide whether 
the main issue that held me back from pulling the trigger and ordering a K3 
some time ago (specifically, the quality of the original K3's receive audio, 
and the anecdotal observations that the K3's receive audio was "tiring" to 
listen to) has been resolved in the K3S.

BTW, if such a review has already been posted or published somewhere and I just 
missed it, I'd would really appreciate a referral to it.  (The holidays are 
approaching and my "wish list" is not yet complete. )

Thanks!

- Paul
  N6LQ (happy builder, owner, and operator of an Elecraft K2/100)

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[Elecraft] PX3 with keyboard

[NN8B]

Just got a new PX3 kit and assembled it last night.
What a great addition to the KX3 station; thanks Elecraft.

I have been seeing the posts about a keyboard and downloaded
and installed the Beta firmware into the PX3. I had a wired
Logitech K120 keyboard and plugged it into the PX3 and now
I see a "K" in the right side of the screen.

Where do I find how to utilize the keyboard and what it does?
I presume it is for digi modes, but how do I use it?

Thanks,
Don, NN8B






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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Vic Rosenthal 4X6GP/K2VCO]

Operators disagree about K3/K3S audio. To me it sounds great, others 
dislike it. The best way to settle the question for your own, personal 
ears, is to find someone nearby who will let you use his/her K3S for a 
few hours.


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

On 27 Oct 2015 19:53, Paul Clay via Elecraft wrote:

I was wondering if and when a full-on review of the K3S would be
forthcoming.  I'm a bit surprised that following its release there
hasn't been a lot of reviews posted (certainly no comparison to the
number of reviews that followed the release of the original K3).  A
comprehensive review of the K3S, particularly with reference to the
original K3, would help me to decide whether the main issue that held
me back from pulling the trigger and ordering a K3 some time ago
(specifically, the quality of the original K3's receive audio, and
the anecdotal observations that the K3's receive audio was "tiring"
to listen to) has been resolved in the K3S.

BTW, if such a review has already been posted or published somewhere
and I just missed it, I'd would really appreciate a referral to it.
(The holidays are approaching and my "wish list" is not yet complete.
)

Thanks!

- Paul N6LQ (happy builder, owner, and operator of an Elecraft
K2/100)

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[Elecraft] K2/10 PS voltage vs IMD? (was Re: Issue Resolved K3 Voltage on TX)

[Al Gulseth]

(My apologies if this has been covered and I missed it in the archives.)

Would the 14.5V recommendation also apply to other Elecraft rigs (in my case a 
K2/10) for best IMD perfomance? Are there any tradeoffs in other areas at 
that voltage vs. 12.6 (i.e. battery) or 13.8?

TNX/73, Al

On Tue October 27 2015 11:45:06 am Jim Brown wrote:
> On Tue,10/27/2015 8:46 AM, Bill W4ZV wrote:
> > If you operate SSB, you might want to run higher voltage at the K3
> > terminals (e.g. at 14.5V which is below the 15.0V spec) to minimize IMD.
>
> IMD is just as much a factor on CW as on SSB. CW is really 100% AM of a
> carrier by a square wave, which we all know is a lot of AF harmonics,
> the strength of which is dependent on the rise and fall time of the
> keying waveform. IMD is clearly visible in the sidebands of CW signals
> on a spectrum display set for very good frequency resolution -- like a
> P3, and especially a P3 with SVGA.
>
> Take a look at http://k9yc.com/P3_Spectrum_Measurements.pdf
>
> These data are with power supply voltage in the range of 12.5V.
>
> 73, Jim K9YC
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Re: [Elecraft] PX3 with keyboard

[Bob N3MNT]

Included in the zip file that contained the firmware update is a PDF that
will answer your questions.




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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Chortek Bob via Elecraft]

The recent ARRL review of the upgraded synthesizer performance is available in 
the current issue of QST. That, by far, is the biggest change in the K3S vs. 
the K3 (not that there aren't other changes, such as cw performance, LF rx, 
etc.)
73,
Bob/AA6VB
  From: Mike K2MK 
 To: elecraft@mailman.qth.net 
 Sent: Tuesday, October 27, 2015 11:58 AM
 Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?
   
Hi Paul,

I'm pretty sure that the "tiring" issue with the K3 was put to bed with the
DSP upgrade with low pass filtering (K3DSPUPGD) in 2010.

73,
Mike K2MK


Elecraft mailing list wrote
> I was wondering if and when a full-on review of the K3S would be
> forthcoming.  I'm a bit surprised that following its release there hasn't
> been a lot of reviews posted (certainly no comparison to the number of
> reviews that followed the release of the original K3).  A comprehensive
> review of the K3S, particularly with reference to the original K3, would
> help me to decide whether the main issue that held me back from pulling
> the trigger and ordering a K3 some time ago (specifically, the quality of
> the original K3's receive audio, and the anecdotal observations that the
> K3's receive audio was "tiring" to listen to) has been resolved in the
> K3S.
> 
> BTW, if such a review has already been posted or published somewhere and I
> just missed it, I'd would really appreciate a referral to it.  (The
> holidays are approaching and my "wish list" is not yet complete. 
> 
> )
> 
> Thanks!
> - Paul





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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Mike K2MK]

Hi Paul,

I'm pretty sure that the "tiring" issue with the K3 was put to bed with the
DSP upgrade with low pass filtering (K3DSPUPGD) in 2010.

73,
Mike K2MK


Elecraft mailing list wrote
> I was wondering if and when a full-on review of the K3S would be
> forthcoming.  I'm a bit surprised that following its release there hasn't
> been a lot of reviews posted (certainly no comparison to the number of
> reviews that followed the release of the original K3).  A comprehensive
> review of the K3S, particularly with reference to the original K3, would
> help me to decide whether the main issue that held me back from pulling
> the trigger and ordering a K3 some time ago (specifically, the quality of
> the original K3's receive audio, and the anecdotal observations that the
> K3's receive audio was "tiring" to listen to) has been resolved in the
> K3S.
> 
> BTW, if such a review has already been posted or published somewhere and I
> just missed it, I'd would really appreciate a referral to it.  (The
> holidays are approaching and my "wish list" is not yet complete. 
> 
> )
> 
> Thanks!
> - Paul





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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Nate Bargmann]

* On 2015 27 Oct 13:59 -0500, Mike K2MK wrote:
> Hi Paul,
> 
> I'm pretty sure that the "tiring" issue with the K3 was put to bed with the
> DSP upgrade with low pass filtering (K3DSPUPGD) in 2010.

I've had my K3 just over 5 years--received in October 2010--and I've
never experienced the "tiring audio".  Still, this gets trotted out on
various forums from time to time as an ongoing issue that has apparently
never been resolved, at least to those who complain about it.
Expressions to the contrary fall on seemingly deaf ears.  Sigh.

73, Nate, N0NB

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us
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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Wayne Burdick]

We've made several changes to improve audio over years, and a K3S incorporates 
all of them:

- K3:  improved 12VDC decoupling to the AF amp
- K3:  added a dual low-noise LPF to eliminate residual sampling noise (mostly 
at 12 kHz)
- K3:  corrected DSP AGC algorithms, which were non-monotonic at some signal 
levels
- K3S: redesigned AF output and driver stages for lower IMD

Taken together, these changes provide a low-distortion, essentially flat audio 
passband. Most other modern transceivers use the same (or similar) class-AB 
final AF amp devices that we use in the K3/K3S, so how it sounds comes down to 
how RX EQ is set up, as well as the LO-CUT/HI-CUT (or shift/width) settings.

73,
Wayne
N6KR



On Oct 27, 2015, at 1:10 PM, Vic Rosenthal 4X6GP/K2VCO  
wrote:

> Operators disagree about K3/K3S audio. 




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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[brian]

+ AGC parameters?
On 10/27/2015 20:28 PM, Wayne Burdick wrote:

We've made several changes to improve audio over years, and a K3S incorporates 
all of them:

- K3:  improved 12VDC decoupling to the AF amp
- K3:  added a dual low-noise LPF to eliminate residual sampling noise (mostly 
at 12 kHz)
- K3:  corrected DSP AGC algorithms, which were non-monotonic at some signal 
levels
- K3S: redesigned AF output and driver stages for lower IMD

Taken together, these changes provide a low-distortion, essentially flat audio 
passband. Most other modern transceivers use the same (or similar) class-AB 
final AF amp devices that we use in the K3/K3S, so how it sounds comes down to 
how RX EQ is set up, as well as the LO-CUT/HI-CUT (or shift/width) settings.

73,
Wayne
N6KR



On Oct 27, 2015, at 1:10 PM, Vic Rosenthal 4X6GP/K2VCO  
wrote:


Operators disagree about K3/K3S audio.




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Re: [Elecraft] PX3 with keyboard

[Ron D'Eau Claire]

The Owner's manual is being updated now but, in the meantime, print out the
release notes that accompany your firmware. They describe all the new
features and changes. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of NN8B
Sent: Tuesday, October 27, 2015 1:00 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] PX3 with keyboard

Just got a new PX3 kit and assembled it last night.
What a great addition to the KX3 station; thanks Elecraft.

I have been seeing the posts about a keyboard and downloaded and installed
the Beta firmware into the PX3. I had a wired Logitech K120 keyboard and
plugged it into the PX3 and now I see a "K" in the right side of the screen.

Where do I find how to utilize the keyboard and what it does?
I presume it is for digi modes, but how do I use it?

Thanks,
Don, NN8B






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Re: [Elecraft] K3 Voltage on TX

[Jeff Cochrane - VK4XA]

Rich,
The first K3 I owned always showed a large voltage drop on TX that was
pretty much incurable (as well as other issues), much to my (and others)
consternation.
I tried (In no particular order)
Heavy gauge power cables, No fuses, Upping the power supply voltage, Re
soldering the 30 Amp Anderson plugs on the power cable [s] and numerous
different power leads, all to no avail.
So, I learnt to live with it sort of. (The issue was always in the back of
my mind however.)
After some time though, financial circumstances forced me to sell my beloved
K - Line.
The new owner of the K3 also had concerns about the voltage drop, but, as he
knew that I had already tried all the common things listed above he gave the
radio the 'once over'.
imagine his surprise when he discovered that there was NO SOLDER AT ALL on
the Anderson Plug leads where they connect to the mainboard of the radio!
So, he soldered the connections and as a result, that K3 now works perfectly
all the time and with minimal voltage drop.
(Which is probably just as well as the owner is a gold miner and lives in
bush camps in Tropical Far North Queensland, Australia using nothing but
solar power and batteries.)

So, it may just be an idea to open the radio and check the solder joints in
and around the Anderson Plugs, you never know, your rig may have a dry joint
there too.

(And yes, I still own a K3, they ARE the best Amateur Radio transceiver on
the planet after all) :)

73 de
Jeff Cochrane - VK4XA (Ex VK4BOF, VK4VHF)
Proud owner of Elecraft K3 #4767


Folks,

I am not sure if I have some sort of issues or not.  My K3 shows 13.7VDC 
on RX. When I TX that reading drops to 10.9VDC.  Is that a normal drop?  
I do not believe this is a K3 issue, but I was wondering if others see 
that much drop before I dig into my 12VDC supply system.

Thanks
Rich
__




-
Jeff Cochrane - VK4XA
Innisfail, QLD, Australia.
K3 #4767

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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Charlie T, K3ICH]

I'm not sure what they did, buy my new K3s sounds better to me than my original 
K3 (27xx S/N), as well as being better than the previous audio winner, my 
IC-7600.  

That said, I have some high frequency hearing loss making conversation in a 
crowd difficult.  However, I could understand almost every one I heard during 
the CQWW contest last weekend.

It was noticeably better and easier to listen to, than the '7600 Rx audio.

Obviously, a personal thing, but I am quite pleased with the audio I'm getting 
from the K3s out of a pair of inexpensive computer speakers.

The audio with the "AFX" enabled is a fun too.  If you're only using one 
speaker, you owe it to yourself to plug in another one to experience the AFX 
mode.

73, Charlie k3ICH

  



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[Elecraft] K3 - PSK31 - AGC/No AGC

[Leroy Buller]

Hi guys

 Old topic from a Old Newbie.  I have been fooling around with PSK 31 and I
have it set up and working but I do have a question.  Do most ops using
this mode turn off the AGC and then ride the RF gain control because of the
stronger signals in the band pass killing off the weaker signals?

Is that how it is doneor am I missing something

Yes, I have searched Google and could not find a good answer.

Lee - K0WA
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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[John Pierce]

​

Audio quality seems to be a very individual matter of taste.   The language
of audiophiles looks to be rivaled only by that of wine experts in trying
to describe their taste.  Radio communication audio doesn't have near that
complexity, but there does still seem to be a lot of personal taste
involved.


I have a K3 that I purchased about 6 years ago.  It has had all the update
mods done to it (except for the KSYN3A upgrade).  I also own a half dozen
other RX, most of them of high quality. After setting the RX audio
equalizer on the K3 to my own preference, I find that it is the easiest to
understand and most pleasing RX audio of any of my receivers.


John  K7KEY

On Tue, Oct 27, 2015 at 10:53 AM, Paul Clay via Elecraft <
elecraft@mailman.qth.net> wrote:

> I was wondering if and when a full-on review of the K3S would be
> forthcoming.  I'm a bit surprised that following its release there hasn't
> been a lot of reviews posted (certainly no comparison to the number of
> reviews that followed the release of the original K3).  A comprehensive
> review of the K3S, particularly with reference to the original K3, would
> help me to decide whether the main issue that held me back from pulling the
> trigger and ordering a K3 some time ago (specifically, the quality of the
> original K3's receive audio, and the anecdotal observations that the K3's
> receive audio was "tiring" to listen to) has been resolved in the K3S.
>
> BTW, if such a review has already been posted or published somewhere and I
> just missed it, I'd would really appreciate a referral to it.  (The
> holidays are approaching and my "wish list" is not yet complete. )
>
> Thanks!
>
> - Paul
>   N6LQ (happy builder, owner, and operator of an Elecraft K2/100)
>
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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Bill]

When I first got my K3, I was very disappointed by the receive audio. 
Hissy etc. I think everyone knows what I am talking about. It was not my 
friend for a very long time.


It took me months of experimenting with the various menu settings and 
speaker selections, but I eventually turned the K3 into the best arm 
chair copy receiver I have ever had.


Most likely, my settings would not be very good for contesting or DXing 
- but, they suit my needs. Make your own settings to please you. Be sure 
to keep notes - the K3 is complicated and it very easy to get lost in a 
never ending maize of menus.


There-in lies why the K3 is such a great rig. The menus allow it to be 
be adjusted to suit the needs of nearly everyone.


Bill W2BLC K-Line
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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Don Wilhelm]

Lee,

I do not turn off the AGC, but instead use the filters to isolate the 
signal of interest with the Width and Shift controls in the event that a 
strong signal is monopolizing the waterfall.


Yes, you can do it your way, but I believe my way will allow you to copy 
weaker signals easily.  You will not see the full waterfall bandwidth 
with the filters narrowed, but then you are only interested in working 
one signal at a time.  When you have finished the QSO, it is a simple 
matter to broaden the width and once again view the entire "battlefield".


73,
Don W3FPR

On 10/27/2015 6:32 PM, Leroy Buller wrote:

Hi guys

  Old topic from a Old Newbie.  I have been fooling around with PSK 31 and I
have it set up and working but I do have a question.  Do most ops using
this mode turn off the AGC and then ride the RF gain control because of the
stronger signals in the band pass killing off the weaker signals?

Is that how it is doneor am I missing something




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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Wes (N7WS)]

I only work PSK on occasion.  I do work a lot of RTTY tho...like V73D on 10M 
about 5 min ago.  I never turn AGC off on any mode.  Never understood why anyone 
would want to but I've only been licensed for 57 years, so maybe I missed something.


On 10/27/2015 3:32 PM, Leroy Buller wrote:

Hi guys

  Old topic from a Old Newbie.  I have been fooling around with PSK 31 and I
have it set up and working but I do have a question.  Do most ops using
this mode turn off the AGC and then ride the RF gain control because of the
stronger signals in the band pass killing off the weaker signals?

Is that how it is doneor am I missing something

Yes, I have searched Google and could not find a good answer.

Lee - K0WA
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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Rick WA6NHC]

What Don says, plus if you're using a sound card interface (any flavor) 
to decode the digital, keep the LIN OUT low (mine is set to 1, zero is 
off) THEN keep the audio as light as possible (driver software) into the 
computer decoder.  What you want is to NOT let the sound card AGC get 
triggered at all.  It only screws things up when that happens.


This is a case of least is best.  BUT if you listen to a wider than 
needed audio bandwidth, the sound card AGC will get tripped which is why 
there is blocking from the stronger audio signals.  Use tightly placed 
filters for QSO, then use a skimmer (wide audio) when hunting.


RTTY seems to need 10 or so dbm above the noise floor for good decoding, 
PSK can be run at the noise floor, most times (depends on if atmospheric 
or human noises).  It requires a lot of experimentation and with 
changing conditions, one size doesn't fit all cases.  Expect to fiddle 
with it, often.


Rick wa6nhc

On 10/27/2015 3:53 PM, Don Wilhelm wrote:

Lee,

I do not turn off the AGC, but instead use the filters to isolate the 
signal of interest with the Width and Shift controls in the event that 
a strong signal is monopolizing the waterfall.


Yes, you can do it your way, but I believe my way will allow you to 
copy weaker signals easily.  You will not see the full waterfall 
bandwidth with the filters narrowed, but then you are only interested 
in working one signal at a time.  When you have finished the QSO, it 
is a simple matter to broaden the width and once again view the entire 
"battlefield".


73,
Don W3FPR

On 10/27/2015 6:32 PM, Leroy Buller wrote:

Hi guys

  Old topic from a Old Newbie.  I have been fooling around with PSK 
31 and I

have it set up and working but I do have a question.  Do most ops using
this mode turn off the AGC and then ride the RF gain control because 
of the

stronger signals in the band pass killing off the weaker signals?

Is that how it is doneor am I missing something




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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Bill Frantz]

When I was using a SignaLink, I used the RF gain control to keep 
strong signals from overloading the input to the computer. I 
would also use the Shift and Width controls to isolate a signal, 
and got a 250 Hz filter to help. Dropping the RF gain control 
until the band noise almost disappeared from the waterfall also 
seemed to improve decoding.


I now use a Tascam US-122 mkII interface. I don't have to adjust 
the RF gain control at all. YMMV.


73 Bill AE6JV

On 10/27/15 at 3:32 PM, lee.bul...@gmail.com (Leroy Buller) wrote:


Old topic from a Old Newbie.  I have been fooling around with PSK 31 and I
have it set up and working but I do have a question.  Do most ops using
this mode turn off the AGC and then ride the RF gain control because of the
stronger signals in the band pass killing off the weaker signals?

Is that how it is doneor am I missing something

Yes, I have searched Google and could not find a good answer.

Lee - K0WA


---
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(408)356-8506  |is there are so many to choose| 16345 
Englewood Ave
www.pwpconsult.com |from.   - Andrew Tanenbaum| Los Gatos, 
CA 95032


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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[David Cole]

I also run with no AGC...  It makes a major difference in how the data
is copied...
-- 
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net

For MixW support see;
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On Wed, 2015-10-28 at 00:22 +, Frank Precissi wrote:
> I run the K3 with AGC-Off in all digital modes and rely on the roofing/DSP
> filters to edge out really strong signals.  Most of the time the software
> will compensate in pulling the weak signals out of the mud a lot better
> than your rig making them louder.
> 
> I would suggest playing with each setting and see what works the best for
> your particular setup.  I've read mixed things about AGC pumping, but dont
> know if they are relevant to the K3.
> 
> Frank
> KG6EYC
> 
> On Tue, Oct 27, 2015 at 5:04 PM Bob McGraw - K4TAX 
> wrote:
> 
> > I do run a fair amount of PSK-31 and much enjoy the same.  In that
> > regard I always run AGC-F.   For selectivity, in dealing with strong
> > signals in the midst of weak signals, I shift the passband and tighten
> > the bandwidth as needed.RF gain is always adjusted based on band
> > noise such that signals just flicker the S meter.  NR and NB can be used
> > with success.  However adjustment of the parameters will be likely
> > needed,  again based on band noise and signals.  In other words "there
> > is no shoe size that fits all".Skill, practice and patience prevails.
> >
> > 73
> > Bob, K4TAX
> > K3S s/n 10163
> >
> >
> >
> > On 10/27/2015 5:32 PM, Leroy Buller wrote:
> > > Hi guys
> > >
> > >   Old topic from a Old Newbie.  I have been fooling around with PSK 31
> > and I
> > > have it set up and working but I do have a question.  Do most ops using
> > > this mode turn off the AGC and then ride the RF gain control because of
> > the
> > > stronger signals in the band pass killing off the weaker signals?
> > >
> > > Is that how it is doneor am I missing something
> > >
> > > Yes, I have searched Google and could not find a good answer.
> > >
> > > Lee - K0WA
> >
> >
> > __
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> > Message delivered to vad...@gmail.com
> >

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Re: [Elecraft] PX3 with keyboard

[Bob N3MNT]

Remember, the Text area changes format when the keyboard is plugged in.  



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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Bob McGraw - K4TAX]

I do run a fair amount of PSK-31 and much enjoy the same.  In that 
regard I always run AGC-F.   For selectivity, in dealing with strong 
signals in the midst of weak signals, I shift the passband and tighten 
the bandwidth as needed.RF gain is always adjusted based on band 
noise such that signals just flicker the S meter.  NR and NB can be used 
with success.  However adjustment of the parameters will be likely 
needed,  again based on band noise and signals.  In other words "there 
is no shoe size that fits all".Skill, practice and patience prevails.


73
Bob, K4TAX
K3S s/n 10163

 


On 10/27/2015 5:32 PM, Leroy Buller wrote:

Hi guys

  Old topic from a Old Newbie.  I have been fooling around with PSK 31 and I
have it set up and working but I do have a question.  Do most ops using
this mode turn off the AGC and then ride the RF gain control because of the
stronger signals in the band pass killing off the weaker signals?

Is that how it is doneor am I missing something

Yes, I have searched Google and could not find a good answer.

Lee - K0WA



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Re: [Elecraft] PX3 with keyboard

[NN8B]

Thanks for the replies.

I have the info I missed when I downloaded the update.
Forgot where it went. Several gentlemen rescued me.
Thanks again.

Now to learn all this new stuff.

73
Don, NN8B



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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Frank Precissi]

I run the K3 with AGC-Off in all digital modes and rely on the roofing/DSP
filters to edge out really strong signals.  Most of the time the software
will compensate in pulling the weak signals out of the mud a lot better
than your rig making them louder.

I would suggest playing with each setting and see what works the best for
your particular setup.  I've read mixed things about AGC pumping, but dont
know if they are relevant to the K3.

Frank
KG6EYC

On Tue, Oct 27, 2015 at 5:04 PM Bob McGraw - K4TAX 
wrote:

> I do run a fair amount of PSK-31 and much enjoy the same.  In that
> regard I always run AGC-F.   For selectivity, in dealing with strong
> signals in the midst of weak signals, I shift the passband and tighten
> the bandwidth as needed.RF gain is always adjusted based on band
> noise such that signals just flicker the S meter.  NR and NB can be used
> with success.  However adjustment of the parameters will be likely
> needed,  again based on band noise and signals.  In other words "there
> is no shoe size that fits all".Skill, practice and patience prevails.
>
> 73
> Bob, K4TAX
> K3S s/n 10163
>
>
>
> On 10/27/2015 5:32 PM, Leroy Buller wrote:
> > Hi guys
> >
> >   Old topic from a Old Newbie.  I have been fooling around with PSK 31
> and I
> > have it set up and working but I do have a question.  Do most ops using
> > this mode turn off the AGC and then ride the RF gain control because of
> the
> > stronger signals in the band pass killing off the weaker signals?
> >
> > Is that how it is doneor am I missing something
> >
> > Yes, I have searched Google and could not find a good answer.
> >
> > Lee - K0WA
>
>
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Digital: FHC #4224 | 30MDG #6370 | DMC #5698 | FBOM #0
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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Jim Brown]

On Tue,10/27/2015 3:50 PM, Wes (N7WS) wrote:
I never turn AGC off on any mode.  Never understood why anyone would 
want to but I've only been licensed for 57 years, so maybe I missed 
something. 


I started three years before you, so maybe I remember more from back 
then. :) In those older days, it was quite common for CW ops to turn 
down the RF gain and turn up the AF gain. In effect, this more or less 
disables AGC. It can also help with listener fatigue with lots of static 
QRN.


BUT -- this can be taken to extremes, and doing so is, I think, 
responsible for those hams who complain of the K3 being "hissy" and 
having "clicks" when switching bandwidth. One of the first important 
things we had to learn in the world of pro audio is setting audio gains 
properly to minimize both distortion and noise. For every gain stage, 
there is a Goldilocks-like "sweet spot" to keep the signal away from 
clipping (distortion) and the noise floor (hiss, clicks, etc.).


73, Jim K9YC
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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Ron D'Eau Claire]

Older receivers (like my HRO-5) used a beat frequency oscillator (BFO)
operating on the same frequency as the I.F., offset only by the audio beat
note required. 

That meant that a huge local signal (the BFO) was blasting into the I.F.
strip. AGC was derived from the RF signal at the "second detector" (where
the I.F. was demodulated to audio). 

So the BFO would cause AGC to crank down the gain to minimum when it sensed
the BFO signal, making the receiver totally deaf. It was essential to turn
the AGC off and ride the RF gain manually with the BFO running. 

By the late 50's Hams were tinkering with various ways to keep the AGC
active with the BFO on. Some use "audio" AGC. That is the AGC was derived
from the audio signal, not the I.F. But that made the AGC slow since it took
a certain number of cycles of signal to build up the AGC voltage and that
happened relatively slowly when it was taken by rectifying an audio signal
compared to the I.F. signal. 

The most successful solutions (before SDR technology took over) were to
split the I.F. with a second mixer that was far removed from the main I.F.
the second I.F. was used to generate the AGC voltage and, since it was on a
wholly different frequency from the main I.F. the BFO didn't trigger the
AGC. In fact, the Elecraft K2 uses that technique quite successfully. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Brown
Sent: Tuesday, October 27, 2015 6:02 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 - PSK31 - AGC/No AGC

On Tue,10/27/2015 3:50 PM, Wes (N7WS) wrote:
> I never turn AGC off on any mode.  Never understood why anyone would 
> want to but I've only been licensed for 57 years, so maybe I missed 
> something.

I started three years before you, so maybe I remember more from back then.
:) In those older days, it was quite common for CW ops to turn down the RF
gain and turn up the AF gain. In effect, this more or less disables AGC. It
can also help with listener fatigue with lots of static QRN.

BUT -- this can be taken to extremes, and doing so is, I think, responsible
for those hams who complain of the K3 being "hissy" and having "clicks" when
switching bandwidth. One of the first important things we had to learn in
the world of pro audio is setting audio gains properly to minimize both
distortion and noise. For every gain stage, there is a Goldilocks-like
"sweet spot" to keep the signal away from clipping (distortion) and the
noise floor (hiss, clicks, etc.).

73, Jim K9YC
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Re: [Elecraft] K3 - PSK31 - AGC/No AGC

[Wes (N7WS)]

Yes but...

Those receivers didn't have product detectors and BFO leakage into the AGC 
detector was an issue.



.On 10/27/2015 6:01 PM, Jim Brown wrote:


 In those older days, it was quite common for CW ops to turn down the RF gain 
and turn up the AF gain. In effect, this more or less disables AGC.


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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Al Lorona]

Oh no... Oh no, not the "bad K3 audio" thread again?!


I'm pretty sure that, five years from now, people will still be asking, "Was 
the phase noise of the new synthesizers reviewed in QST ever fixed so that it's 
better than the old synthesizer at higher offsets?"


Al  W6LX
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