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

[Bob McGraw - K4TAX]

Back in 1923, in order to receive a signal, the following adjustments 
must be made and possibly repeated to get the optimum performance (not a 
simple matter and easily upset): The input coil (inside box) is adjusted 
to resonate at the desired receiving frequency using the two tap 
selectors on the front panel of the box.The inductance of the secondary 
coil is set by its tapping switch and tuned by a capacitor to suit the 
frequency being received. Moving the secondary coil in and out of the 
primary (in the box) allows coupling to adjusted for maximum 
performance. With coil pushed in, the sensitivity will be high and the 
selectivity will be poor. The reverse occurs with the coil pulled out.


73
Bob, K4TAX

On 10/28/2015 8:47 PM, Fred Jensen wrote:

How do I set the AGC on my loose coupler receiver?

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Fred Jensen]

How do I set the AGC on my loose coupler receiver? :-)  I'm old, but 
I've never used the RF Gain on my K3.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 10/28/2015 6:19 PM, Bob McGraw - K4TAX wrote:

Don is absolutely correct.

As many may know, I do assist hams with issues associated with many
different products here and elsewhere.  The biggest issue I encounter is
the ham that says " well somebody told me to blah blah blah blah
.and it would work best".   In many cases, nothing could be further
from the truth.   I find today that many hams are more prone to have and
use old school thinking and methods trying to be used with today's
radios.  I find this applies to many facets of ham radio equipment as
being used today.

As I've told many, if you expect the radio  to operate like a Kenwood,
ICOM or Yaesu, it darn well better say Kenwood, ICOM or Yaesu on the
front panel.  Otherwise stated, learn to use the Elecraft radio
correctly in order to attain optimum performance, for indeed they do not
operate like the others.

73
Bob, K4TAX
K3S s/n 10163


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Bob McGraw - K4TAX]

Don is absolutely correct.

As many may know, I do assist hams with issues associated with many 
different products here and elsewhere.  The biggest issue I encounter is 
the ham that says " well somebody told me to blah blah blah blah 
..and it would work best".   In many cases, nothing could be further 
from the truth.   I find today that many hams are more prone to have and 
use old school thinking and methods trying to be used with today's 
radios.  I find this applies to many facets of ham radio equipment as 
being used today.


As I've told many, if you expect the radio  to operate like a Kenwood, 
ICOM or Yaesu, it darn well better say Kenwood, ICOM or Yaesu on the 
front panel.  Otherwise stated, learn to use the Elecraft radio 
correctly in order to attain optimum performance, for indeed they do not 
operate like the others.


73
Bob, K4TAX
K3S s/n 10163
 


On 10/28/2015 7:19 PM, Don Wilhelm wrote:
Those old operating habits (ride the RF Gain and set the AF Gain at 
max) are still being used by some operators, but it is not necessary 
for modern receivers which use product detectors - the K2 is included 
in that list.


73,
Don W3FPR 



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Icoms answer to the KX3??

[Wayne Burdick]

Joe W2KJ  wrote:

> Howdy Fellow Elecrafters:
> 
> Saw something new from Icom called the IC7300.
> 
> Looks like a direct conversion architecture ala the KX3 but larger in size,  
> I believe.

Based on Icom's published specs, by volume it is 7.5 times larger than the KX3.

Wayne
N6KR

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Don Wilhelm]

David,

I do not understand your logic.
Let's divorce the AGC from the product detector for a moment.  The K2 
takes the input to the AGC circuit from the IF and converts it to a 
frequency that is removed from the IF signal.  The AGC circuit produces 
a DC voltage that is used to control the gain of the IF amplifier - period.
That has nothing to do with balanced or unbalanced - the output is a a 
DC voltage which is applied to the IF amplifier to control its gain.


That means that the only signals applied to the product detector are the 
incoming signal (already controlled by the AGC) and the BFO.


Yes, receivers of old did not use product detectors (mixers) but used a 
diode detector, and the BFO signal was injected along with the IF signal 
to produce the audio output.  The BFO injection level was fixed, and 
therefore the gain of the IF input to the detector had to be matched to 
the BFO level for proper demodulation to occur.  The result is that one 
had to ride the RF Gain to make the levels of the IF signal and the BFO 
work in harmony with each other.  In addition, the AGC was developed 
after the detector, so in those old receivers, it was best to turn off 
the AGC.


That is not true for receivers using a product detector.  BFO pickup is 
not a problem with a product detector as long as the output of the mixer 
(product detector) is restricted to a bandpass that contains only the 
audio frequencies (the input frequencies - BFO and IF - are rejected 
leaving only the audio content).


Those old operating habits (ride the RF Gain and set the AF Gain at max) 
are still being used by some operators, but it is not necessary for 
modern receivers which use product detectors - the K2 is included in 
that list.


73,
Don W3FPR

On 10/28/2015 7:33 PM, David Woolley wrote:
Although I hadn't noticed it before, I would say that design in the K2 
is more about stability and DC offsets than anything to do with pick 
up of the BFO.  The balanced demodulator and last two crystals deal 
with that.


The old, basically AM sets, used high level, unbalanced detectors.  
That required more total gain from aerial to detector, although that 
might be split between RF and two IF frequencies.


Balanced detectors can work with much lower level signals, which is 
particularly helpful for a single conversion design, like the K2. 
However, the AGC detector doesn't want to be balanced, and with a low 
level signal, would have a large DC offset, that might exceed the 
wanted rectified AGC, therefore additional gain is needed before the 
AGC detector.  If this were done at the IF frequency, the gain from 
input to output at one frequency would be much greater, and 
proportionately less stray coupling would be needed to make the whole 
system oscillate.  By shifting the frequency, which can be done at low 
signal levels, the design reduces the gain at any one frequency.


The risk with doing all at one frequency is not pickup of the BFO at 
the input of the IF amplifier, but pickup of its own output.


If there were leakage of the BFO it would get amplified just as much 
as if additional gain was tapped off at the same point and amplified 
at the original frequency.  The design seems to rely on the balance of 
the detector and the two pole crystal filter, to stop the BFO getting 
into the AGC path, and not the difference in frequency.




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] K3 and Wsjt

[Michael Eberle]

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[David Woolley]

Although I hadn't noticed it before, I would say that design in the K2 
is more about stability and DC offsets than anything to do with pick up 
of the BFO.  The balanced demodulator and last two crystals deal with that.


The old, basically AM sets, used high level, unbalanced detectors.  That 
required more total gain from aerial to detector, although that might be 
split between RF and two IF frequencies.


Balanced detectors can work with much lower level signals, which is 
particularly helpful for a single conversion design, like the K2. 
However, the AGC detector doesn't want to be balanced, and with a low 
level signal, would have a large DC offset, that might exceed the wanted 
rectified AGC, therefore additional gain is needed before the AGC 
detector.  If this were done at the IF frequency, the gain from input to 
output at one frequency would be much greater, and proportionately less 
stray coupling would be needed to make the whole system oscillate.  By 
shifting the frequency, which can be done at low signal levels, the 
design reduces the gain at any one frequency.


The risk with doing all at one frequency is not pickup of the BFO at the 
input of the IF amplifier, but pickup of its own output.


If there were leakage of the BFO it would get amplified just as much as 
if additional gain was tapped off at the same point and amplified at the 
original frequency.  The design seems to rely on the balance of the 
detector and the two pole crystal filter, to stop the BFO getting into 
the AGC path, and not the difference in frequency.


--
David Woolley
Owner K2 06123
On 28/10/15 03:15, Ron D'Eau Claire wrote:



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.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] K3 Xtal Filters for sale (really!)

[William Evans]

Gentlemen, 
the 6K filter is spoken for (pending payment)  Thanks

Bill
W4ISH
> On Oct 28, 2015, at 6:38 PM, William Evans  wrote:
> 
> KFL3A-6K 8 pole filter for K3 or K3S$110 - includes shipping CONUS
> KFL3A-400 8-Pole filter for K3 or K3S  $110 - includes shipping CONUS
> 
> both for $210 including shipping
> 
> Bill
> W4ish @ w4ish.net
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w4...@w4ish.net

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Icoms answer to the KX3??

[Lynn W. Taylor, WB6UUT]

It has a Touch Screen!  Sweet!!



On 10/28/2015 3:48 PM, Joe W2KJ wrote:

Howdy Fellow Elecrafters:

Saw something new from Icom called the IC7300.

Looks like a direct conversion architecture ala the KX3 but larger in size,  I 
believe.

The KX3 might have been the first such multi-band design with front panel 
display, knobs. buttons, etc, similar to traditional superhet transceivers and 
it appears that Icom is following the lead.

Would love to see the technical specs on this new rig.

73, Joe W2KJ
KX3/KXPA100

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Icoms answer to the KX3??

[Joe W2KJ]

Howdy Fellow Elecrafters:

Saw something new from Icom called the IC7300.

Looks like a direct conversion architecture ala the KX3 but larger in size,  I 
believe.

The KX3 might have been the first such multi-band design with front panel 
display, knobs. buttons, etc, similar to traditional superhet transceivers and 
it appears that Icom is following the lead.

Would love to see the technical specs on this new rig.

73, Joe W2KJ
KX3/KXPA100
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] For Sale: K3 Xtal Filters

[Ian - Ham]

Which ones? How much?

Thanks and 73,

--Ian
Ian Kahn, KM4IK
Roswell, GA  EM74ua
km4ik@gmail.com
10-10 #74624, North Georgia Chapter #2038
PODXS 070 #1962
K3# 281, P3 #688, KAT500 #860, KPA500 #1468


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
William Evans
Sent: Wednesday, October 28, 2015 6:34 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] For Sale: K3 Xtal Filters


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to km4ik@gmail.com


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K3 Xtal Filters for sale (really!)

[William Evans]

KFL3A-6K 8 pole filter for K3 or K3S$110 - includes shipping CONUS
KFL3A-400 8-Pole filter for K3 or K3S  $110 - includes shipping CONUS

both for $210 including shipping

Bill
W4ish @ w4ish.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KX3 AGC HLD settings

[Cady, Fred]

Hi Grant,
When I did my KX3 books I somehow figured out it is 0.00 to 2.00 seconds.  
That's what the K3 does and I assume the KX3 is the same.
Cheers,
Fred KE7X

Author of:
“The Elecraft K3S and P3 – Getting the Most out from Your High Performance 
Station”.
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Portable Elecraft KX3 – Going for the Summit with the KX3 and KX3-2M/4M"
“The Elecraft KX-Line – The Complete Station”
“The Elecraft KPA500 and KAT500 – the K-Line Dream Station”
Printed, coil bound copies of these are all available at www.elecraft.com
PDF files available from www.ke7x.com
“The Elecraft KXPA100, PX3 and 2M/4M Transverters – Assembling the KX3-Line 
Station” printed copy available at www.lulu.com and pdf from www.ke7x.com.
Plus a book dedicated to the K3S upgrades for the K3 and a 3rd Edition of the 
K3 book are works in progress.
Free guides at ke7x.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners



From: Elecraft  on behalf of GRANT YOUNGMAN 

Sent: Wednesday, October 28, 2015 10:07 AM
To: Elecraft Reflector
Subject: [Elecraft] KX3 AGC HLD settings

The KX3 manual indicates that the AGC HLD setting is in “seconds”.  It doesn’t 
appear that “001” in the three digit display is one second.

I suspect its either “(.)XXX” seconds or “X(.)XX” seconds.  I must have missed 
something in the book somewhere.  A search on Nabble, update history, etc. 
didn’t go anywhere either.

Can someone shed some light?

Thanks … Grant NQ5T


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to fc...@montana.edu
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] For Sale: K3 Xtal Filters

[William Evans]

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KX3 to Computer

[martin waller]

Hi 

Thanks for the tip about holding the microphone! I've only played on 2m so far 
so I should not have upset too many people! 

Martin

Sent from my iPhone

> On 28 Oct 2015, at 22:16, "Lynn W. Taylor, WB6UUT" 
>  wrote:
> 
> This looks useful: https://k4mtx.wordpress.com/2013/04/11/kx3-fldigi-setup/
> 
> It's specific to FLDIGI, but all of the soundcard modes require pretty much 
> the same wiring.
> 
> Please note: if you hold the microphone to the PC speaker, the microphone 
> will pick up background noise and transmit that all over the band.
> 
> Generally speaking, you'll be operating in a part of the band that 
> discourages wideband noise.
> 
> 73 -- Lynn
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to mar...@the-wallers.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KX3 to Computer

[Lynn W. Taylor, WB6UUT]

This looks useful: https://k4mtx.wordpress.com/2013/04/11/kx3-fldigi-setup/

It's specific to FLDIGI, but all of the soundcard modes require pretty 
much the same wiring.


Please note: if you hold the microphone to the PC speaker, the 
microphone will pick up background noise and transmit that all over the 
band.


Generally speaking, you'll be operating in a part of the band that 
discourages wideband noise.


73 -- Lynn
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KX3 to Computer

[martin waller]

Hi Lyle

Many thanks for the complete explanation. I'll give it a whirl.

Martin
G0PJO

Sent from my iPhone

> On 28 Oct 2015, at 21:44, Lyle Johnson  wrote:
> 
> Disable the mic buttons (see menu items) and use VOX (or a serial port 
> command) to switch between Tx and Rx depending on your program's features.
> 
> And be sure to set MIG GAIN to ZERO then gradually increase it to get the 4-5 
> bars of ALC indication.  If the MIC GAIN is too high for the computer's audio 
> level, the ALC bar graph and the transmit audio levels may not respond 
> properly (this is a bug on my short list to fix).
> 
> 73,
> 
> Lyle KK7P
> 
>> Good question...I have been holding the microphone infront of the PC speaker 
>> in the interim as that worked as a temporary solution.
>> ...
>> 
>>  What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 &
>> SSTV...
>> 
>> So how do you connect the audio for transmitting?
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to mar...@the-wallers.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KX3 to Computer

[Lyle Johnson]

Disable the mic buttons (see menu items) and use VOX (or a serial port 
command) to switch between Tx and Rx depending on your program's features.


And be sure to set MIG GAIN to ZERO then gradually increase it to get 
the 4-5 bars of ALC indication.  If the MIC GAIN is too high for the 
computer's audio level, the ALC bar graph and the transmit audio levels 
may not respond properly (this is a bug on my short list to fix).


73,

Lyle KK7P


Good question...I have been holding the microphone infront of the PC speaker in 
the interim as that worked as a temporary solution.
...

  What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 &
SSTV...

So how do you connect the audio for transmitting?


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K3 and Wsjt

[Guy F2CT]

Hello
I need some help in order to use my K3 + K144XV in JT modes.
What's the best adaptor between K3 and PC ?
Thanks a lot for help.
Kundest Regards

Cordiales 73
Guy F2CT
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KX3 to Computer

[Martin Waller]

Hi,
Good questions. I have been playing with RTTY myself this last few days and hit 
just that problem. I have been holding the microphone infront of the PC speaker 
in the interim as that worked as a temporary solution.
I would like to know the best way of doing this too.
MartinG0PJO 


 On Wednesday, 28 October 2015, 20:58, Forest Shick 
 wrote:
   

 What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 &
SSTV. I have purchased the cable set. I connect the KX3 - Phones connector
to the computer audio in and I can receive RTTY & SSTV. If I connect the
computer audio out to the KX3 MIC, the radio goes into transmit. I would
guess this is because the connector on the cable is incorrect for the MIC
connector - too few contacts.

 

So how do you connect the audio for transmitting?

Thank You

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to mar...@the-wallers.net


   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] KX3 to Computer

[Forest Shick]

What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 &
SSTV. I have purchased the cable set. I connect the KX3 - Phones connector
to the computer audio in and I can receive RTTY & SSTV. If I connect the
computer audio out to the KX3 MIC, the radio goes into transmit. I would
guess this is because the connector on the cable is incorrect for the MIC
connector - too few contacts.

 

So how do you connect the audio for transmitting?

Thank You

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [OT] LA Zoning Code re Amateur Towers

[David Ahrendts]

Off-topic. Anyone on the list have experience with zoning and permitting an 
amateur radio tower in the City of Los Angeles. City of LA only. Please contact 
directly off list. davidahren...@me.com 

David A., KC0XT



David Ahrendts   davidahren...@me.com   




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K3 For Sale

[kd7rj]

Elecraft K3/100 watt transceiver S/N 5999 with KXV3A IF and 2.7 KHZ SSB filter. 
 No other options installed.  Comes with manuals and DC power cord.  Very good 
condition and built and calibrated by Electrical Engineer.  Most recent 
firmware and recently calibrated.  Shipped priority mail within the 50 states.  
$1730
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[ae4pb]

Jim, 
Do you have Fred Cady's book on the K3? What audio and noise reduction
issues are you experiencing ? I'm a new owner and a voracious reader and
find learning to use the radio for noise reduction is pretty daunting,
however, I also haven't had any noise issues that I couldn't adjust out to
isolate the desired signal.
I use the RF gain, pre-amp, roofing filtering, DSP filtering, NR settings,
AGC settings, NB and NB settings. In my mind the key is to understand what
each of these does, how they interact, general parameters of the received
signals in the bandpass (pre roofing filters), and being able to actually
hear the desired signal at to start. 

Just curious because my prior radio did a decent job but nothing even close
to what my K3S does. 
I have the 400Hz and 2.8KHz 8 pole roofing filters installed and use a
dipole for RX.


Jerry Moore
CDXA, INDEXA, SKCC, Fists
AE4PB, K3S - S.N. 010324
http://www.qrz.com/db/AE4PB
An Amateur is - Considerate, Loyal, Progressive, Friendly, Balanced, and
Patriotic.

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of jim
Sent: Wednesday, October 28, 2015 12:13 PM
To: 'Al Lorona'; 'Charlie T, K3ICH'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?

Al,

The thread will not go away until something is done to address the issue.

Elecraft makes the best "system" in the market place, however, the audio and
noise reduction implantation leaves a lot to be desired.

Jim
W6AIM


.


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Al
Lorona
Sent: Tuesday, October 27, 2015 9:37 PM
To: Charlie T, K3ICH; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?

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
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jbol...@outlook.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to je...@carolinaheli.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[jim]

Al,

The thread will not go away until something is done to address the issue.

Elecraft makes the best "system" in the market place, however, the audio and
noise reduction implantation leaves a lot to be desired.

Jim
W6AIM


.


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Al
Lorona
Sent: Tuesday, October 27, 2015 9:37 PM
To: Charlie T, K3ICH; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?

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
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jbol...@outlook.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] KX3 AGC HLD settings

[GRANT YOUNGMAN]

The KX3 manual indicates that the AGC HLD setting is in “seconds”.  It doesn’t 
appear that “001” in the three digit display is one second. 

I suspect its either “(.)XXX” seconds or “X(.)XX” seconds.  I must have missed 
something in the book somewhere.  A search on Nabble, update history, etc. 
didn’t go anywhere either.

Can someone shed some light?

Thanks … Grant NQ5T


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] WTB: Elecraft K-1 four band

[Gee]

I am looking to buy an excellent condition K-1, built or unbuilt kit, with the 
four band module covering 40-30-20-17 meters. Any accessories, ATU, NB, 
internal battery mod a plus. Thanks for your interest! 




Sent from my iPad
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[N2TK, Tony]

Wayne,
Thanks for the clarification. My main interest is with headphones.
By the way the new SP3 looks and sounds nice.

The three K3's did well for themselves as usual down at KP2M this past
weekend. And at Miami last night I ran into N2NT on his way back from V4
with his K-line. We were both talking about a PX3 sized P3 for the K3. It
sure would be easier to haul around for contests.
73,
N2TK, Tony

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Wednesday, October 28, 2015 11:13 AM
To: jim 
Cc: 'Vic Rosenthal 4X6GP/K2VCO' ;
elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?

All of the improvements I mentioned benefit the headphone jacks, *except*
the AF amp redesign, which affects only the internal and external speakers.

The headphone amplifier has always had extremely low distortion.

Wayne
N6KR


On Oct 28, 2015, at 8:00 AM, jim  wrote:

> Wayne,
> 
> Will any of the changes affect the audio from either front or back 
> headphone jacks, or is it only affect the speaker, both internal and any
external?
> 
> Jim
> W6AIM
> 


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to tony@verizon.net

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[GRANT YOUNGMAN]

Any notion yet about when the new DSP board will be available for order for K3 
retrofit?

Thanks .. Grant NQ5T


> On Oct 28, 2015, at 9:35 AM, Wayne Burdick  wrote:
> 
> The speaker amplifier and driver stages that were redesigned are on the DSP 
> board, not the KIO3B. 
> 
> The KIO3B does have new audio circuitry, namely a CODEC and support circuitry 
> for merging line-level audio with control data for use by the new USB port. 
> But this has nothing to do with the speaker amp.
> 
> 73,
> Wayne
> N6KR
> 
> 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Wayne Burdick]

All of the improvements I mentioned benefit the headphone jacks, *except* the 
AF amp redesign, which affects only the internal and external speakers.

The headphone amplifier has always had extremely low distortion.

Wayne
N6KR


On Oct 28, 2015, at 8:00 AM, jim  wrote:

> Wayne,
> 
> Will any of the changes affect the audio from either front or back headphone
> jacks, or is it only affect the speaker, both internal and any external?
> 
> Jim
> W6AIM
> 


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Stewart]

Thanks for the "heads up" Wayne.

73
Stewart G3RXQ
-
On Wed, 28 Oct 2015 07:35:54 -0700, Wayne Burdick wrote:
> The speaker amplifier and driver stages that were redesigned are on the DSP 
board, not the KIO3B.
>
> The KIO3B does have new audio circuitry, namely a CODEC and support circuitry 
for merging line-level audio with control data for use by the new USB port. But 
this has nothing to do with the speaker amp.
>
> 73,
> Wayne
> N6KR
>
>
> On Oct 28, 2015, at 4:10 AM, Stewart  wrote:
>
>> Hi Ian,
>> Yes, I keep my K3 pretty well up to date with firmware releases, so if they 
are
>> there I will have them.
>>
>> A little confused about the redesigned audio.
>>
>> You wrote about "redesigned AF output and driver stages. These upgrades were
>> introduced in the new KIO3B module".


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[jim]

Wayne,

Will any of the changes affect the audio from either front or back headphone
jacks, or is it only affect the speaker, both internal and any external?

Jim
W6AIM



.

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Tuesday, October 27, 2015 1:28 PM
To: Vic Rosenthal 4X6GP/K2VCO
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?

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. 




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jbol...@outlook.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[jim]

Mike,

I have a different opinion and it does not rely on words like "tiring".  

In June, 2015, I went as far as sending my K3 (#04841) back to Elecraft with
the headphones I use to take a look at the hiss issue I have when the volume
control set completely counter clockwise, with *nothing* attached to the rig
but a 12 volt car battery and the headphones.  This hiss is always present
when the A.F. gain is set for normal listening to signals.

I have compared my K3 to two of my friends K3's and mine is the only one
with noticeable hiss (pre and post service by Elecraft).  

I had Elecraft perform the "once over" making sure I had the latest fixes
(firmware, gold contacts, etc)and install two of the latest and greatest SYN
boards.  The audio hiss is still present.

I have worked around the problem by using the Timewave 599ZX which has no
hiss that I can hear.

Just as a side note, I used my Kenwood TS-480 rig when the K3 was in the
shop, and found the audio was better than the K3 and the noise reduction
algorithm was superior for my conditions.  This, in itself, can be a
complete new thread.

Jim
W6AIM

P.S.  

The Elecraft service level is second to none, going to great lengths in an
attempt to sort out the issue.



.

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike
K2MK
Sent: Tuesday, October 27, 2015 11:58 AM
To: elecraft@mailman.qth.net
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





--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3S-In-Depth-Review-Coming-Soon-tp76096
15p7609616.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to jbol...@outlook.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Wayne Burdick]

These algorithms were corrected a couple of years ago and are already part of 
the K3/K3S firmware load.

73,
Wayne
N6KR


On Oct 28, 2015, at 12:41 AM, Stewart  wrote:

> I am interested as to whether the corrected DSP AGC algorithms will be 
> available
> for K3 DSP's.
> 
> 73
> Stewart G3RXQ



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Wayne Burdick]

The speaker amplifier and driver stages that were redesigned are on the DSP 
board, not the KIO3B. 

The KIO3B does have new audio circuitry, namely a CODEC and support circuitry 
for merging line-level audio with control data for use by the new USB port. But 
this has nothing to do with the speaker amp.

73,
Wayne
N6KR


On Oct 28, 2015, at 4:10 AM, Stewart  wrote:

> Hi Ian,
> Yes, I keep my K3 pretty well up to date with firmware releases, so if they 
> are 
> there I will have them.
> 
> A little confused about the redesigned audio. 
> 
> You wrote about "redesigned AF output and driver stages. These upgrades were 
> introduced in the new KIO3B module".


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] WTB: K3 (old) parts

[Udo Langenohl - DK5YA]

Gents,

just purchased an older K3F (ser.39xx) from estate (local ham passed 
away). This K3 is very basic, just 10W,  2.7KHz filter and KBPF3. 
Nothing else.


For upgrading I'm looking for KXV3A, KPA3A, KAT3A, KRX3A etc..
If you've got parts for sale just drop me a note. Overseas offers welcome.

Udo, DK5YA
--
**
Webs by DK5YA:   *
http://www.mmmonvhf.de/  [editor]*
http://www.vhfdx.de/ [owner] *
http://www.palekastro.de/[owner] *
http://www.solweb.de/[owner] *
http://www.spessartwetter.de/[owner] *
**

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Stewart]

Hi Ian,
Yes, I keep my K3 pretty well up to date with firmware releases, so if they are 
there I will have them.

A little confused about the redesigned audio. 

You wrote about "redesigned AF output and driver stages. These upgrades were 
introduced in the new KIO3B module".

As I remember the audio stage of my K3 is on the DSP board. Has it been moved, 
or have I misunderstood ?

B.T.W re our conversation at the Convention about ferrites. They have not 
rusted 
yet :-)

73
Stewart G3RXQ



 
On Wed, 28 Oct 2015 09:57:52 -, Ian White wrote:
> Hi Stewart
>
>>I am interested as to whether the corrected DSP AGC algorithms will be
>>available
>>for K3 DSP's.
>
> Your K3 has probably had these DSP changes for some time (assuming you
> have kept the firmware reasonably up-to-date). Future firmware releases
> will apply equally to both the K3S and the K3.
>
> Likewise, all hardware upgrades prior to release of the K3S have already
> been incorporated into K3 production. Hardware upgrade kits are
> available for older models - see the Elecraft website, which also states
> when each upgrade was introduced.
>
> The only only exception listed below is the redesigned AF output and
> driver stages. These upgrades were introduced in the new KIO3B module
> which now forms part of the K3S (a radical redesign which also includes
> USB connectivity for CAT and audio). The KIO3B will eventually be
> available for the K3 as well, as an optional replacement for the older
> KIO3.
>
>
> 73 from Ian GM3SEK
>
>>-Original Message-
>>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>>Stewart
>>Sent: 28 October 2015 07:42
>>To: Wayne Burdick; Vic Rosenthal 4X6GP/K2VCO
>>Cc: elecraft@mailman.qth.net
>>Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?
>>
>>I am interested as to whether the corrected DSP AGC algorithms will be
>>available
>>for K3 DSP's.
>>
>>73
>>Stewart G3RXQ
>>On Tue, 27 Oct 2015 13:28:19 -0700, 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.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Ian White]

Hi Stewart

>I am interested as to whether the corrected DSP AGC algorithms will be
>available
>for K3 DSP's.

Your K3 has probably had these DSP changes for some time (assuming you
have kept the firmware reasonably up-to-date). Future firmware releases
will apply equally to both the K3S and the K3. 

Likewise, all hardware upgrades prior to release of the K3S have already
been incorporated into K3 production. Hardware upgrade kits are
available for older models - see the Elecraft website, which also states
when each upgrade was introduced. 

The only only exception listed below is the redesigned AF output and
driver stages. These upgrades were introduced in the new KIO3B module
which now forms part of the K3S (a radical redesign which also includes
USB connectivity for CAT and audio). The KIO3B will eventually be
available for the K3 as well, as an optional replacement for the older
KIO3.
 

73 from Ian GM3SEK

>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>Stewart
>Sent: 28 October 2015 07:42
>To: Wayne Burdick; Vic Rosenthal 4X6GP/K2VCO
>Cc: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon?
>
>I am interested as to whether the corrected DSP AGC algorithms will be
>available
>for K3 DSP's.
>
>73
>Stewart G3RXQ
>On Tue, 27 Oct 2015 13:28:19 -0700, 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.
>>
>> 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

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

[Stewart]

I am interested as to whether the corrected DSP AGC algorithms will be 
available 
for K3 DSP's.

73
Stewart G3RXQ
On Tue, 27 Oct 2015 13:28:19 -0700, 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.
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to stew...@twinwood.me


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com