Date   

Re: [Elecraft_K3] Re: Reports on IMD-3 from the K3S/10W? (started new topic)

Hans Remeeus
 


IMHO Rob has a very very good point! I fully agree that manufacterers could do more to make our signals - on the very crowdy HF-bands - much cleaner than they are now. Are 50 Volt power supplies that expensive nowadays? What can we do ourselves?; check our processor setting and view our ALC?

73, Hans.


Vriendelijke groeten,
Hans Remeeus (PA1HR/OE3JRC)
http://www.remeeus.eu
http://www.hansremeeus.nl
Communication is about people, the rest is technology. 
Op 21-9-2015 om 17:19 schreef Rob Sherwood. rob@... [Elecraft_K3]:

 

The ALC in the FTdx-5000 destroys the excellent linearity in class A.   Half-scale ALC is about 3 dB, and that degrades IMD about 20 dB, again in class A.   Kind of makes class A pointless unless one runs no ALC and little or no speech processing.  If you do that, the 5000 is cleaner than any other rig on the market short of the Apache ANAN with predistortion (clear speech). 

When pointed out to Yaesu, their comment was "the very fast ALC decay makes the rig louder".  
Why don't they fix their speech processor instead of processing with ALC?  

It is a shame more rigs that will never be run mobile don't use 50-volt PAs. You can fill in the blanks.  The TS-990S is about 6 dB cleaner than a typical 13.8 volt PA, and its IMD is quite consistent from 50 watts to 200 watts.  Predistortion can improve distortion 20 dB or more, and without the heat dissipation issue with class A.  Predistortion can even include the external linear amplifier in the signal loop.  All rigs today should offer this.  With today's computing power in any rig, one would think setting up the loop level properly for predistortion could be automatic and "plug and play".  For an external linear all that is needed is a coupler with the proper attenuation and a flat frequency response.  

Rob
NC0B



On Sep 21, 2015, at 7:54 AM, "no9e@... [Elecraft_K3]" <Elecraft_K3@...> wrote:

 

Assuming that the design of the PA in K3 is not that much different than KX3, you can look at IMD of KX3 at various power and supply levels in Files section of KX3 yahoo group. 


Real life IMD of FT-5000 may be worse than that of K3 or KX3. Old FT1000 series had very fast ALC that drastically deteriorated IMD for real signals whether A mode or not.  I remember someone saying that the ALC is still unfixed in FT-5000. Both K3 and KX3 have very slow decay ALC that does not increase IMD.

Ignacy, NO9E 


If this email is spam, report it to www.OnlyMyEmail.com


Re: [Elecraft_K3] Re: Reports on IMD-3 from the K3S/10W? (started new topic)

Rob Sherwood
 

The ALC in the FTdx-5000 destroys the excellent linearity in class A.   Half-scale ALC is about 3 dB, and that degrades IMD about 20 dB, again in class A.   Kind of makes class A pointless unless one runs no ALC and little or no speech processing.  If you do that, the 5000 is cleaner than any other rig on the market short of the Apache ANAN with predistortion (clear speech). 

When pointed out to Yaesu, their comment was "the very fast ALC decay makes the rig louder".  
Why don't they fix their speech processor instead of processing with ALC?  

It is a shame more rigs that will never be run mobile don't use 50-volt PAs. You can fill in the blanks.  The TS-990S is about 6 dB cleaner than a typical 13.8 volt PA, and its IMD is quite consistent from 50 watts to 200 watts.  Predistortion can improve distortion 20 dB or more, and without the heat dissipation issue with class A.  Predistortion can even include the external linear amplifier in the signal loop.  All rigs today should offer this.  With today's computing power in any rig, one would think setting up the loop level properly for predistortion could be automatic and "plug and play".  For an external linear all that is needed is a coupler with the proper attenuation and a flat frequency response.  

Rob
NC0B



On Sep 21, 2015, at 7:54 AM, "no9e@... [Elecraft_K3]" <Elecraft_K3@...> wrote:

 

Assuming that the design of the PA in K3 is not that much different than KX3, you can look at IMD of KX3 at various power and supply levels in Files section of KX3 yahoo group. 


Real life IMD of FT-5000 may be worse than that of K3 or KX3. Old FT1000 series had very fast ALC that drastically deteriorated IMD for real signals whether A mode or not.  I remember someone saying that the ALC is still unfixed in FT-5000. Both K3 and KX3 have very slow decay ALC that does not increase IMD.

Ignacy, NO9E 



If this email is spam, report it to www.OnlyMyEmail.com


Re: Reports on IMD-3 from the K3S/10W? (started new topic)

Ignacy Misztal
 

Assuming that the design of the PA in K3 is not that much different than KX3, you can look at IMD of KX3 at various power and supply levels in Files section of KX3 yahoo group. 

Real life IMD of FT-5000 may be worse than that of K3 or KX3. Old FT1000 series had very fast ALC that drastically deteriorated IMD for real signals whether A mode or not.  I remember someone saying that the ALC is still unfixed in FT-5000. Both K3 and KX3 have very slow decay ALC that does not increase IMD.

Ignacy, NO9E 


Re: [Elecraft_K3] Reports on IMD-3 from the K3S/10W?

mikerodgerske5gbc
 

Hans,

No problem. Now you know. 

73
Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night. 

On Sep 20, 2015, at 12:22 AM, "Hans Remeeus hans@... [Elecraft_K3]" <Elecraft_K3@...> wrote:

 


Hello Mike,

Sorry for the inconvenience I caused.

73, Hans.


Vriendelijke groeten,
Hans Remeeus (PA1HR/OE3JRC)
http://www.remeeus.eu
http://www.hansremeeus.nl
Communication is about people, the rest is technology.
Op 20-9-2015 om 02:28 schreef mikerodgerske5gbc@... [Elecraft_K3]:
 
Hans,

Your probably not aware that you added your topic on top of the flex topic or so it appears. 
You need to start a brand new email to correctly change topics. Notice at the bottom 28+ messages in this topic. 

For IMD, it generally accepted better IMD at 80% or so. Since you don't have a 8w input level available, I'm not sure about 2-3 watt level. 

I have a k3/10 but no test equipment. 
I use it to drive a Modified Als-600 amp. 

73
Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night. 

On Sep 19, 2015, at 3:15 AM, "Hans Remeeus hans@... [Elecraft_K3]" <Elecraft_K3@...> wrote:

 


Hello!

After five satisfying years FTdx5000 I am considering to buy the K3S/10W, next to my KX3.

RX and TX quality of the FTdx5000 still is at a *very high level*, despite new techniques and developments by other manufacturers. This makes the decision to change rig not very simple...

My main considerations to change to the K3S are the excellent service and feedback from Elecraft, the high-grade roofing filters, the feedback from contesters/DX'ers/reviewers and the fact that I am extremely satisfied with the KX3.

I have no doubts at all about the RX quality and ergonomics of the K3S. The only doubt I have is the IMD of the K3S. With my FTdx5000 in Class-A, even in combination with my linear amplifier Acom 2000A and >1 kW output, I always receive reports of at least -45dB IMD-3. There are not much transmitters on the hamradio market who have such good and clean signal like the FTdx5000!

My question is: has someone in the group reliable figures of the IMD-3 from the K3S/10W? A good way to measure its IMD-3 is with the two-tone generator and showed on a SDR PAN-adapter/waterfall.

Many TNX in advance and 73, Hans.


---
Vriendelijke groeten,
Hans Remeeus (PA1HR/OE3JRC)
http://www.remeeus.eu
http://www.hansremeeus.nl
Communication is about people, the rest is technology.






Reports on IMD-3 from the K3S/10W? (started new topic)

Hans Remeeus
 


Hello!

After five satisfying years FTdx5000 I am considering to buy the K3S/10W, next to my KX3.

RX and TX quality of the FTdx5000 still is at a *very high level*, despite new techniques and developments by other manufacturers. This makes the decision to change rig not very simple...

My main considerations to change to the K3S are the excellent service and feedback from Elecraft, the high-grade roofing filters, the feedback from contesters/DX'ers/reviewers and the fact that I am extremely satisfied with the KX3.

I have no doubts at all about the RX quality and ergonomics of the K3S. The only doubt I have is the IMD of the K3S. With my FTdx5000 in Class-A, even in combination with my linear amplifier Acom 2000A and >1 kW output, I always receive reports of at least -45dB IMD-3. There are not much transmitters on the hamradio market who have such good and clean signal like the FTdx5000!

My Linear Amplifier has three adjustable input levels:
0,1 - 0,3 Watt
2 - 3 Watt
20 - 30 Watt

What I want to know is the IMD of the K3S/10W, when the output power is reduced within the first two levels.

In practice (and measurements) we notice that reducing power is not always equivalent to reduced IMD.


Many TNX in advance and 73, Hans.



-- 

Vriendelijke groeten,
Hans Remeeus (PA1HR/OE3JRC)
http://www.remeeus.eu
http://www.hansremeeus.nl
Communication is about people, the rest is technology. 



[Elecraft_K3] FS: Elecraft K3/0 Remote Unit & RemoteRig RRC-1258-MkII Units

Steven Bertsch
 

FOR SALE:

Excellent condition, non-smoking environment, hardly used.

Elecraft K3/0 Remote Unit & MH2 Hand Mic
RemoteRig RRC-1258 MkII Units
All Cables

Less than 20 hours of use.

I’m asking $1200 and I’ll pay shipping and insurance to lower 48 states.
PayPal preferred.

Please contact me off the reflector at:

Steve Bertsch, K6SAB
(415) 747-5959
Novato, CA 94945



Re: [Elecraft_K3] Re: TX EQ Settings - only work while viewing the menu option. Please help!

Tom Kruczek
 

BINGO!


Thanks, Joe.  That did it.  I will go back and review the manual (again).


73

Tom Kruczek

W1TXT


Re: [Elecraft_K3] Re: TX EQ Settings - only work while viewing the menu option. Please help!

Joe Subich, W4TV
 

Do you have CONFIG:TX MON = FAST?

If so the effects of DSP will only appear in the monitor audio when
being adjusted (See the Owners Manual).

73,

... Joe, W4TV

On 9/19/2015 8:15 PM, w1txt@arrl.net [Elecraft_K3] wrote:
Another observation...


Compression only seems to be effective when I rotate the CMP knob to change it's settings. Once I switch to PWR (for example), the settings seem to be neutralized. Then, when going back to CMP, I need to rotate the knob to change the setting (say from 24 to 25) and then it becomes effective again.


It's as if all TX audio settings are ignored, even though set.


Thanks again.
Tom Kruczek
W1TXT


Re: [Elecraft_K3] Reports on IMD-3 from the K3S/10W?

mikerodgerske5gbc
 

Hans,

Your probably not aware that you added your topic on top of the flex topic or so it appears. 
You need to start a brand new email to correctly change topics. Notice at the bottom 28+ messages in this topic. 

For IMD, it generally accepted better IMD at 80% or so. Since you don't have a 8w input level available, I'm not sure about 2-3 watt level. 

I have a k3/10 but no test equipment. 
I use it to drive a Modified Als-600 amp. 

73
Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night. 

On Sep 19, 2015, at 3:15 AM, "Hans Remeeus hans@... [Elecraft_K3]" <Elecraft_K3@...> wrote:

 


Hello!

After five satisfying years FTdx5000 I am considering to buy the K3S/10W, next to my KX3.

RX and TX quality of the FTdx5000 still is at a *very high level*, despite new techniques and developments by other manufacturers. This makes the decision to change rig not very simple...

My main considerations to change to the K3S are the excellent service and feedback from Elecraft, the high-grade roofing filters, the feedback from contesters/DX'ers/reviewers and the fact that I am extremely satisfied with the KX3.

I have no doubts at all about the RX quality and ergonomics of the K3S. The only doubt I have is the IMD of the K3S. With my FTdx5000 in Class-A, even in combination with my linear amplifier Acom 2000A and >1 kW output, I always receive reports of at least -45dB IMD-3. There are not much transmitters on the hamradio market who have such good and clean signal like the FTdx5000!

My question is: has someone in the group reliable figures of the IMD-3 from the K3S/10W? A good way to measure its IMD-3 is with the two-tone generator and showed on a SDR PAN-adapter/waterfall.

Many TNX in advance and 73, Hans.


---
Vriendelijke groeten,
Hans Remeeus (PA1HR/OE3JRC)
http://www.remeeus.eu
http://www.hansremeeus.nl
Communication is about people, the rest is technology.





Re: TX EQ Settings - only work while viewing the menu option. Please help!

Tom Kruczek
 

Another observation...


Compression only seems to be effective when I rotate the CMP knob to change it's settings.  Once I switch to PWR (for example), the settings seem to be neutralized.  Then, when going back to CMP, I need to rotate the knob to change the setting (say from 24 to 25) and then it becomes effective again. 


It's as if all TX audio settings are ignored, even though set.


Thanks again.

Tom Kruczek

W1TXT


TX EQ Settings - only work while viewing the menu option. Please help!

Tom Kruczek
 

So I must be missing something.  It's been awhile since I've changed my K3's EQ settings.  But, the only way the TX EQ settings seem to be in effect (this is while listening with the K3's monitor) is to be viewing the TX EQ menu itself.  As soon as I move off of that menu item or move out of the menu setup, the EQ settings seem to not be operational.


There must be something I've forgotten about and missed but I can't find it.


Thanks in advance for your comments.


Tom Kruczek

W1TXT


Re: [Elecraft_K3] Thanks

Charlie T, k3ICH
 

Don’t forget the duel band verticle antenna for sell.  Oh, it also comes with a Manuel ( To help install it ???)

 

Chas

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Saturday, September 19, 2015 5:56 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] Thanks

 

 

A too common problem, along with your, you're, yore; there, their, they're; to, too, two. etc...  It could be worse, you could use "like" for every third word, or say, "I'm like going" instead of "I said." 



On 9/19/2015 1:57 PM, Larry Guthrie yrralguthrie@... [Elecraft_K3] wrote:

 

Advice that is.

 

On Sat, Sep 19, 2015 at 1:37 PM, yrralguthrie@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

For those that helped with my I/Q problems, thanks.

 

I've taken your advise and ordered an isolator.

 

Larry-KW5B



 

--

Larry J. Guthrie

Sulphur, Oklahoma

Never insult the alligator until you cross the river.

 


Re: [Elecraft_K3] Thanks

Wes
 

A too common problem, along with your, you're, yore; there, their, they're; to, too, two. etc...  It could be worse, you could use "like" for every third word, or say, "I'm like going" instead of "I said." 



On 9/19/2015 1:57 PM, Larry Guthrie yrralguthrie@... [Elecraft_K3] wrote:
 
Advice that is.

On Sat, Sep 19, 2015 at 1:37 PM, yrralguthrie@... [Elecraft_K3] <Elecraft_K3@...> wrote:
 

For those that helped with my I/Q problems, thanks.


I've taken your advise and ordered an isolator.


Larry-KW5B




--
Larry J. Guthrie
Sulphur, Oklahoma
Never insult the alligator until you cross the river.


Re: [Elecraft_K3] Thanks

Larry Guthrie <yrralguthrie@...>
 

Advice that is.

On Sat, Sep 19, 2015 at 1:37 PM, yrralguthrie@... [Elecraft_K3] <Elecraft_K3@...> wrote:
 

For those that helped with my I/Q problems, thanks.


I've taken your advise and ordered an isolator.


Larry-KW5B




--
Larry J. Guthrie
Sulphur, Oklahoma
Never insult the alligator until you cross the river.


Thanks

yrralguthrie@...
 

For those that helped with my I/Q problems, thanks.


I've taken your advise and ordered an isolator.


Larry-KW5B


KPA500 Problems

Mike VE3YF
 

Hi:

I am having problems to get my KPA500 to key. The KAT500 keys (Completes the tune cycle) but can't get the KPA500 to key.

I have taken the Aux cable from the K3 and moved it up to the KPA500 and still won't key. I move it back to the KAT500 and the KAT500 keys up fine but not the KPA500.

I have been doing some reading here and there and have eliminated a few things.

Digout1 is Off
Cover interlock for the KPA500 is ok.
Aux cable works on the tuner so I am presuming it is good

HV is at 75.1 and when I key the K3, that voltage doesn't move
When I key the amp, I get 0 current
No faults appear.

The K3 and the KPA500 are talking to each other, I can do band changes from the KPA500, etc

When I key the K3, (I have the KAT500 in MAN and Antenna 2 is hooked into a dummy load).
the SWR on the KAT500 goes to 1.2, and on the KPA500 in Operate, the Far left green LEDS on the
Power and SWR bargraphs light up, and the PWR readout is 25w both on the K3 and KPA500.

I have even taken the Aux cable off the KPA500 and tried putting a phono cable on the PA Key jack and shorting out the connector still doesn't key the KPA.

I am quite sure others have had this problem before. But I'm at a loss. The K3 can talk to both the KAT and KPA and the KPA can talk to the K3.

Any help would be greatly appreciated.

Tnx

73 De Mike
VE3YF



Re: [Elecraft_K3] Error on Firmware upload

OZ0J Joe
 

Hi all

 

I switch to another user on the same laptop and succeeded to upload all firmware.

 

But I did NOT saved the configuration file before doing that.

 

So far the K3 Is running, but according to Elecraft I need to calibrate the radio again.

 

73 Joe OZ0J

 

 

Fra: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sendt: 18. september 2015 16:45
Til: Elecraft_K3@...
Emne: Re: [Elecraft_K3] Error on Firmware upload

 

 

Are you by chance running any type of microham router while loading?  This can be a problem.

 

73,

Drew K3PA


Re: [Elecraft_K3] Error on Firmware upload

Larry Guthrie <yrralguthrie@...>
 

No,  I am in a motorhome and the noise may be coming from the voltage converter.

Larry

On Fri, Sep 18, 2015 at 9:44 AM, drew.vonadasmith@... [Elecraft_K3] <Elecraft_K3@...> wrote:
 

Are you by chance running any type of microham router while loading?  This can be a problem.


73,

Drew K3PA




--
Larry J. Guthrie
Sulphur, Oklahoma
Never insult the alligator until you cross the river.


Re: [Elecraft_K3] Error on Firmware upload

drew.vonadasmith@...
 

Are you by chance running any type of microham router while loading?  This can be a problem.


73,

Drew K3PA


Re: [Elecraft_K3] Error on Firmware upload

mikerodgerske5gbc
 

There is a help file on the k3 utility. 

Are you using a laptop?  If so try a desktop. If you can't , make sure laptop is plugged in to AC. A powered USB hub can help. Been there so I feel for ya!

73
Mike R

Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night. 

On Sep 17, 2015, at 8:34 AM, "'Joe - OZ0J' contest@... [Elecraft_K3]" <Elecraft_K3@...> wrote:

 

Hi

 

 

I have tried to upgrade the firmware of my K3.

 

I the first attempt it when well until installing of DSP1. Since then I have “ERR DSE” in the display.

 

I have used a USB to RS232 cable, and Windows 8.1 can find the cable without problems.

 

I have tried to move the cable to another USB plug and I have Changed the COM port No in Windows.

 

Present the radio has a dead RX and will not communicate with me at all.

 

Any suggestions?

 

 

73 Joe OZ0J

 

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