Date   

K3 ERR TXF on 6m FM with 12 kHz filter

John V
 

Greetings all "socially distancing folks". 
I've trying to hit a local repeater on 6m FM. I have the proper frequency, PL code and off-set, the mode shows as FM T and - (minus) . I can "kerchunk" the machine once but then I instantly get the ERR TXF message in the VFO B window. I can clear the ERR TXF message by switching to another mode and back to FM and repeat the ERR TXF by transmitting again.  I have set the 12 kHz filter (Installed in Filter #1 slot)  using the K3 Utility and also via the config mode using the radio -- BW 12.00, FM enable, TX FM. I've searched the group and  I've read the related sections in the Factory manual and in the Cady book -- but "groundhog day"  persists. 

What am I missing?   Thanks,  John NA6L  


Looking to upgrade my K3----New/Used

Len Signoretti
 

I am looking to fully upgrade my K3....
options.
I am also looking for a replacement Sub VFO Knob.
I am looking for the following either New or Used.
(2) KSYN3A boards
KXV3B second preamp
KIO3B 3-board set
KDVR3 DVR
K144XV 2-meter transceiver
K3 Sub VFO Knob

Please kindly reply with what you have available and asking price too:
N2LEN @ AOL dot com
n2len@...
Thanks!


New release of Win4K3Suite

Tom Blahovici
 

Hello,
There is a new version of Win4K3Suite available, version 2.022. This release adds the ability to automatically close applications launched with the third party software interface.
 
Win4K3Suite is a full featured control program for the K3/S, KX3 and KX2.  It has a built in Panadapter that works with LPPAN and a sound card, as well as the SDRPlay RSP's. It supports the KAT500, KPA500/1500 and the KXPA100 on most of the above radios.  
A unique feature is that is has 6 built in Virtual Radios, each of which works just like an Elecraft radio.  This allows sharing of a single COM port with up to 6 applications.  It also has a built in HRDLogbook server and the EiBi Shortwave database.
You see more information here: https://www.youtube.com/results?search_query=win4k3suite
and download a fully functional 30 day trial at va2fsq.com
 
73 Tom
va2fsq.com


Re: Behaviour of KPA500 when K3S on 2 metre transverter

David Robinson
 

Hi Alan

Thats normal and has always been that way (like the inability to turn down the power of the 2m internal XV to zero output!)



"With CONFIG:KIO3B set to NOR, the BAND0-3
outputs are mapped based on the selected HF-6 m
band as shown below. On transverter bands,
BAND0-3 will all be set to zero."

if band 0-3 are outputing zeros, which is the code for 60m , thats where the kpa500 thinks it is

There  is nothing in the menus to avoid it. If you unplug the band data cable it will still show 60m

Dave
G4FRE 


Re: KFL3A-2.1k available

METRA FLORENT
 

Thank you Ed,

Great Idea ! I found on Inrad website, it is #709 !

Have a nice weekend !

73's Florent, F4CWN/AF7SN
JN03KN dpt32


Le samedi 21 mars 2020 à 12:24:25 UTC+1, Ed Pflueger <ab4iq@...> a écrit :


Contact InRad in Knoxville TN.  I believe Scott supplies them to Elecraft.

 

Ed.. AB4IQ

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of METRA FLORENT via Groups.Io
Sent: Saturday, March 21, 2020 6:15 AM
To: elecraft-k3@groups.io
Subject: [Elecraft-K3] KFL3A-2.1k available

 

Hi,

 

anyone know if KFL3A-2.1k is available for sale at Elecraft ? I used the Part Information Request Form ( https://elecraft.com/pages/parts-information-request-form) 10 days ago, but no response from Elecraft ?

 

Thank you,

 

Best 73's Florent, F4CWN


Re: KFL3A-2.1k available

Ed Pflueger
 

Contact InRad in Knoxville TN.  I believe Scott supplies them to Elecraft.

 

Ed.. AB4IQ

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of METRA FLORENT via Groups.Io
Sent: Saturday, March 21, 2020 6:15 AM
To: elecraft-k3@groups.io
Subject: [Elecraft-K3] KFL3A-2.1k available

 

Hi,

 

anyone know if KFL3A-2.1k is available for sale at Elecraft ? I used the Part Information Request Form ( https://elecraft.com/pages/parts-information-request-form) 10 days ago, but no response from Elecraft ?

 

Thank you,

 

Best 73's Florent, F4CWN


KFL3A-2.1k available

METRA FLORENT
 

Hi,

anyone know if KFL3A-2.1k is available for sale at Elecraft ? I used the Part Information Request Form ( https://elecraft.com/pages/parts-information-request-form) 10 days ago, but no response from Elecraft ?

Thank you,

Best 73's Florent, F4CWN


Re: K4

 

Yes. 

Wayne
N6KR

On Mar 19, 2020, at 2:19 PM, Ray <anyone1545@...> wrote:

What is the PTT connector on the K4?  Is it an RCA phono jack like the K3s
Ray
W8LYJ




K4

Ray
 

What is the PTT connector on the K4? Is it an RCA phono jack like the K3s
Ray
W8LYJ


Re: Interesting P3 Observation

Ray Maxfield
 

I set my Bass at 0 and Increase  Gain a Step at a time to +10 db at 3000 Hz.

To compensate for Hearing Loss.    Ray

 

From: Chuck Miller
Sent: Wednesday, March 18, 2020 6:08 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Interesting P3 Observation

 

On Wed, Mar 18, 2020 at 06:09 PM, K9MA wrote:

Indeed, "broadcast quality" emphasizes the low frequencies. That's why it's so hard to understand speech on your car radio when it's noisy. It helps a lot to just turn down the bass.

 

73,

Scott K9MA

Indeed, After a song is mixed with extra bass in the studio, then has extra bass added by the station, and the bass is emphasised when rebroadcast on satellite radio, its all boom, boom, boom, and just noise. Turnig down the bass helps, but not enough to make the music enjoyable. Of course I have some high frequency hearing loss from 22 years working around jet engines (US Navy ret.). Even with hearing aids it's just noise now.

73, Chuck
N0NC

 


Re: Interesting P3 Observation

Chuck Miller
 

On Wed, Mar 18, 2020 at 06:09 PM, K9MA wrote:
Indeed, "broadcast quality" emphasizes the low frequencies. That's why it's so hard to understand speech on your car radio when it's noisy. It helps a lot to just turn down the bass.
 
73,
Scott K9MA
Indeed, After a song is mixed with extra bass in the studio, then has extra bass added by the station, and the bass is emphasised when rebroadcast on satellite radio, its all boom, boom, boom, and just noise. Turnig down the bass helps, but not enough to make the music enjoyable. Of course I have some high frequency hearing loss from 22 years working around jet engines (US Navy ret.). Even with hearing aids it's just noise now.

73, Chuck
N0NC


Re: Interesting P3 Observation

Mel Farrer, K6KBE <farrermesa@...>
 

Well, for my 2 cents worth, I like a flat response from low to high.  That is what their voice sounds .like in person.  Now for contesting, who cares.

Mel, K6KBE

Virus-free. www.avg.com


On Wed, Mar 18, 2020 at 4:09 PM K9MA <K9ma@...> wrote:
Indeed, "broadcast quality" emphasizes the low frequencies. That's why it's so hard to understand speech on your car radio when it's noisy. It helps a lot to just turn down the bass.

73,
Scott K9MA


On 3/18/2020 07:44, Steve wrote:
You are so correct.  I have attended several talks given by Bob Heil regarding the useful audio spectrum that we should use in our transmitters.  He admits that any energy below 400 Hz is just energy lost.   I have set my K3s  to attenuate the first three segments of the TX EQ as much a possible. 
I talk to many folks on SSB that show the majority of their TX energy between 0 and 1000 Hz and they sound like they are in a barrel and are difficult to understand unless the conditions are exceptional.  They say they want broadcast quality audio.  Clearly they have not idea what they sound like at the receiving end and resist any suggestions.


-- 
Scott  K9MA

k9ma@...


Re: Interesting P3 Observation

K9MA
 

Indeed, "broadcast quality" emphasizes the low frequencies. That's why it's so hard to understand speech on your car radio when it's noisy. It helps a lot to just turn down the bass.

73,
Scott K9MA


On 3/18/2020 07:44, Steve wrote:
You are so correct.  I have attended several talks given by Bob Heil regarding the useful audio spectrum that we should use in our transmitters.  He admits that any energy below 400 Hz is just energy lost.   I have set my K3s  to attenuate the first three segments of the TX EQ as much a possible. 
I talk to many folks on SSB that show the majority of their TX energy between 0 and 1000 Hz and they sound like they are in a barrel and are difficult to understand unless the conditions are exceptional.  They say they want broadcast quality audio.  Clearly they have not idea what they sound like at the receiving end and resist any suggestions.


-- 
Scott  K9MA

k9ma@...


Re: Interesting P3 Observation

redarlington <rdarlington@...>
 

They'll sound great with really wide receivers.  Or like you said, like they're in a barrel with a lot of RF going in places your 2.8kHz filter is not letting them  through.  And when I'm on the radio, I'm open about that wide or less. Never more.  It's wasted energy and really bad for DXing, but again, does sound great if you're wide enough for it.  Bob Heil's page has great info on how to adjust mics for punch to get the important part of the audio spectrum emphasized and the rest pushed back so the watts going out are conveying useful information.  I sound funny with the settings for a PR-4 microphone to me, but everybody else thinks the audio is great and I can be not just heard, but understood all around the globe.

-Bob N3XKB

On Wed, Mar 18, 2020 at 6:44 AM Steve <99sunset@...> wrote:
You are so correct.  I have attended several talks given by Bob Heil regarding the useful audio spectrum that we should use in our transmitters.  He admits that any energy below 400 Hz is just energy lost.   I have set my K3s  to attenuate the first three segments of the TX EQ as much a possible. 
I talk to many folks on SSB that show the majority of their TX energy between 0 and 1000 Hz and they sound like they are in a barrel and are difficult to understand unless the conditions are exceptional.  They say they want broadcast quality audio.  Clearly they have not idea what they sound like at the receiving end and resist any suggestions.


Re: Interesting P3 Observation

Steve
 

You are so correct.  I have attended several talks given by Bob Heil regarding the useful audio spectrum that we should use in our transmitters.  He admits that any energy below 400 Hz is just energy lost.   I have set my K3s  to attenuate the first three segments of the TX EQ as much a possible. 
I talk to many folks on SSB that show the majority of their TX energy between 0 and 1000 Hz and they sound like they are in a barrel and are difficult to understand unless the conditions are exceptional.  They say they want broadcast quality audio.  Clearly they have not idea what they sound like at the receiving end and resist any suggestions.


Re: Interesting P3 Observation

Richard Katsch
 

Hi,

There seems to have been much discussion of the best equalisation settings to maximise the effective use of the available transmission power of our radios.

Nobody has yet mentioned, or I've missed, the use of the Speech Intelligibility Index (SII) as detailed in (American National Standards Institute [ANSI] S3.5-1997, 2007). This standard shows that the majority of the intelligibility of a speech signal is contained between ~400Hz to 3kHz. Transmitting below this band basically provides no more useful intelligibility. Transmitting above the band provides a little more intelligibility.

As well, if you transmit this lower frequency signal you increase the overall loudness of the signal. Reducing this perceived loudness at the receiver by decreasing the volume leads to less energy in the useful bands. You've lost both ways. Additionally the phenomenon of "upward spread of masking" can result in higher frequency sounds being masked by lower frequency sounds. This is particularly bad for those of us with a high frequency hearing loss of some sort.

All of this experimentally derived information is well detailed out on the net and provides a scientific justification for the excellent recommendations provided here to attenuate the transmission of the lower frequency bands.

Best regards
Richard Katsch
VK2EIK


Interesting P3 Observation

Bob McGraw - K4TAX
 

With recent communications and observations with my P3, I see lots of SSB signals that contain a lot of information below 300 Hz.  Much is centered around 200 Hz or so.   The point is, the fact this consumes a lot of nonessential transmit energy by worthless signal occurring in the less than 200 Hz frequency range.

One of the fellows commented to me:   " In your second point, {Still, it is representative of the TX BW and audio response.}  it seems that the majority of SSB signals do not come anywhere close to filling their passband.  Most of the energy is crowded up against the suppressed carrier frequency [low frequency audio], which is not real effective in communications.  In the "Olden Days," we'd tailor the speech amp and "build-out" the modulation transformer to get a good AM communications response.  Today, my radio has a TX equalizer and I don't have to plug the soldering iron in."

I know Jim, K9YC, has strongly advocated attenuation the three lower bands of the TX EQ as much as -16 dB each with the 4th band attenuated -9 dB to -12 dB.     I find this to be correct and does add a lot of "cleanliness" and articulation to ones transmitted audio.  And it does not affect the natural sound of the male voice.

I have attached a P3 capture of one of the represented signals.   Note the first peak to the right of the carrier frequency is 200 Hz and is clearly the most dominant part in the audio spectrum.  The green vertical bar represents the receiver bandwidth of 2.7 kHz.

73
Bob, K4TAX



Re: [Elecraft] KPA1500 SWR Tolerance

Paul Baldock <paul@...>
 

I keep the SWR below 1.2, using Autotune and manual tweaking. This is necessary to keep the gain reasonably constant across a band. I store values for Wet and Dry if necessary , and then use the ^OS ^PB function assigned to PF1 to select between them. I set/store my max drive power level to achieve 1.3KW PEP (on an external meter) and never turn it up even if the output power drops a little. So far the amplifier's finals have survived.

- Paul KW7Y

At 07:43 PM 3/16/2020, you wrote:
I've long been aware that my KPA1500 would not run at full power (1.5 kW) unless the SWR was very low. (This is SWR at the input to the ATU, if used.) The current ATU firmware does a pretty good job of keeping the SWR below about 1.3:1, which usually is low enough. In any case, I just ran a simple test on 160, where I have an antenna I can easily tune to 1:1, or deliberately higher. The ATU was engaged, but it's settings were not changed during the test. The SWR indicated was that at the ATU input (amplifier output). I found that the output power remained nearly constant up to 1.4:1, but the current increased from 58 to 62 A. (This with no adjustment of the K3 power, though the indicated input power varied slightly.) At 1.5:1, the current exceeded 65 A and the amplifier faulted. By reducing drive, I was able to run it at 1.4 kW output and 60 A. The above is typical of my experience on other bands, etc. The effect of SWR on the amplifier, of course, depends on the actual impedance at the amplifier, so in some cases it may be more or less sensitive to SWR. Do others see similar effects? 73, Scott K9MA -- Scott K9MA k9ma@sdellington.us ______________________________________________________________ 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 paul@paulbaldock.com


Re: [Elecraft] [Elecraft-K3] Interesting P3 Anomaly

Al N1AL
 

Yes, what you're seeing is IF leakage, not the RF signal.  The level level is uncontrolled and depends on the isolation of the PIN diode switches, etc.

Yes, you can see it by transmitting, with the RS-232 cable that normally goes between the K3 and the P3 temporarily disconnected.

Because it is the IF signal, it doesn't show distortion caused by the transmitter PA.  Still, it does display the frequency response of the transmitted signal, which can be useful when setting up the TX equalizer.

Alan N1AL

On 3/15/20 8:09 PM, David Box wrote:
Don't know what you mean "doesn't represent your transmitted signal" It is leakage of your signal at the IF, I see it with my SDR that is tied to the P3 IF out and it looks exactly like the signal I see on a spectrum analyzer using a coupler.
de Dave K5MWR


On March 15, 2020 8:11:07 PM CDT, Brian K0DTJ <huntinhmb@coastside.net> wrote:
As I recall, if you disconnect the RS232 thru the P3 to the K3 it the
P3 will display your spectrum since it doesn't know to mute during TX.
Someone from Elecraft said it was due to "leakage" and is at IF so
doesn't represent your transmitted signal. Seems like you found a
software way to do this. :-)


Re: [Elecraft] Interesting P3 Anomaly

David Box
 

Don't know what you mean "doesn't represent your transmitted signal" It is leakage of your signal at the IF, I see it with my SDR that is tied to the P3 IF out and it looks exactly like the signal I see on a spectrum analyzer using a coupler.
de Dave K5MWR


On March 15, 2020 8:11:07 PM CDT, Brian K0DTJ <huntinhmb@...> wrote:
As I recall, if you disconnect the RS232 thru the P3 to the K3 it the P3 will display your spectrum since it doesn't know to mute during TX. Someone from Elecraft said it was due to "leakage" and is at IF so doesn't represent your transmitted signal. Seems like you found a software way to do this. :-)

73,
Brian, K0DTJ
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