Date   

Fw: [Elecraft_K3] Re: Falling Behind

Roger <rc143dr@...>
 

Hello Rich,

Looks like a repackaged Hermes DUC/DDC transciever designed under the openhpsdr group with an external RF amp in an extruded case with connections.

I had owned the Mercury reciever designed by this group for a while and it was a very good receiver (but a little less than convenient to use in the shack packaging wise). I believe they repackaged that receiver along with a transmitter on a single, stand-alone card. Also, they changed the data exchanged to/from the computer from USB to Ethernet. Not sure of other changes/improvements they may have made.

You can find out a little more from http://openhpsdr.org/hermes.php and associated sites.

Hope this helps a little.

73,

Roger (AE3RT)

--- In Elecraft_K3@yahoogroups.com, "Richard Fjeld" wrote:

Whoops. That should read ANAN-10.


----- Original Message -----
From: Richard Fjeld
To: Elecraft_K3@yahoogroups.com
Sent: Thursday, January 17, 2013 12:57 AM
Subject: Re: [Elecraft_K3] Re: Falling Behind




Someone has mentioned the ANAN-100 SDR. Has anyone in this group purchased one yet? If so, would you care to comment please? I have read eHam reviews, but I'd like to hear from someone in this group. One website indicated it is made in India. Sometimes one has to explore to find how good he has it.

Rich, n0ce

----- Original Message -----
From: Joe Subich, W4TV
To: Elecraft_K3@yahoogroups.com
Sent: Wednesday, January 16, 2013 9:09 PM
Subject: Re: [Elecraft_K3] Re: Falling Behind




> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14
> will rival the Perseus SDR. The Perseus is #5 on Sherwood
> Engineering's list.

SDR-14 and Perseus are not even in the same league. Perseus is spec'd
for > 100dB dynamic range vs. 90 for the SDR-14. Perseus is an 80Ms/s
vs. 66 MS/s for the SDR-14. Perseus has a 30 dBm 3rd order intercept
vs. 15 dBm for the SDR-14.

> The only problem is, it doesn't have a front panel and the virtual
> controls are on a computer screen in stead of a knob that you can
> grab, you use the mouse wheel to change a digit on the SpectraVue
> tuning control.

It would take a lot more computing power than the K3's controller to
provide a "real radio" interface for a DDR like any of the SDR-IQ/14,
Perseus, etc. Bending a DDC to a conventional interface would also
negate most of the best features of DDC
.
73,

... Joe, W4TV

On 1/16/2013 5:16 PM, wa9fvp wrote:
> I use an RF-Space SDR-14 in conjunction with my K3, the SpectraVue software supports the K3 and I can have 3 receivers. The SDR-14 locks on the K3's 8.215 MHz I.F. and the spectrum/waterfall tracks the K3's frequency. ON my PC I can mouse click on the waterfall and the K3 jumps to that frequency. When I tune or change bands on the K3, the spectrum/waterfall follows the K3's frequency.
>
> Because it interfaced so well with the K3, I didn't buy the KRX3 sub receiver and there's LO interference from the SDR-14
>
> I can also separate the SDR-14 from the K3 and use as a stand-alone receiver. The only problem is, it doesn't have a front panel and the virtual controls are on a computer screen in stead of a knob that you can grab, you use the mouse wheel to change a digit on the SpectraVue tuning control.
>
> I'm not saying that Electraft should drop the KRX3, I'm just suggesting that an SDR sub-receiver be available for the K3 for people like me that don't need two matched receivers. I'm sure it's doable.
>
> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14 will rival the Perseus SDR. The Perseus is #5 on Sherwood Engineering's list.
>
>
>
> --- In Elecraft_K3@yahoogroups.com, george fritkin wrote:
>>
>> Falling behind? I wonder how many people on this net have other high end radios to do real world comparisons.  The numbers, at the highest performance levels get so close you have to consider measurement accuracies, environment, and other ambient conditions.
>> Â
>> The K3 and the ORIONll set the standards for me. The FTDX5000 and 9K ergonomics are radio killers. I won't even comment on the ICOMs.
>> Â
>> We guys that are fortunate to have and play with a lot of radio know what I am taking about.
>> Â
>> George, W6GF
>>
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>


Re: [Elecraft_K3] Re: Noise from K3 100W amplifier

Richard Fjeld <rpfjeld@...>
 

Sometimes it takes some current demand before an ailing filter cap is noticed.
Rich, n0ce
 

----- Original Message -----
From: Jim
Sent: Thursday, January 17, 2013 4:02 AM
Subject: [Elecraft_K3] Re: Noise from K3 100W amplifier

 

Fortunately the K3 100W amplifier was not at fault. The problem was
caused by noise from a hefty 40 amp linear PSU which had given
impeccable service for several years. Jim G3KAF



PSK with Signalink USB interface

Jon <jon@...>
 

Anyone using the Signalink with their K3? What are you settings for the transmit on the signalink, power on k3, line-in setting (mic), etc. I'm not sure mine is working right on transmit. Do you set the ALC level to about 4 bars with the control on the Signalink or the Mic control?


Re: (K3) Any K3 Owners running WSPR Program??

kc2nyu <eckerpw@...>
 

Thanks to the help of Cliff, VK2CC, I got the problem corrected. In the WSPR setup, under handshake I had "Hardware" selected, by changing to "None", the WSPR program now changes freqs on my K3, Thanks to all who replied.

73 Paul kc2nyu

--- In Elecraft_K3@yahoogroups.com, Rick Bates wrote:

I occasionally run WSPR but if I remember right, I use the HRD interface for radio control.

Rick wa6nhc/6

Tiny iPhone 5 keypad, typos are inevitable

On Jan 15, 2013, at 8:19 PM, "keith.nichols4" wrote:

Hi Paul,

Yes, I run WSPR from time to time. I also use SignaLink USB. I seem to be able to change frequency on the radio with the WSPR software OK. Does Fldigi control your K3 correctly? If so, I'd check the radio control section of the WSPR software to insure it is correctly set up for the serial port.

73,

Keith
K7KEV@...


Re: [Elecraft_K3] High Temp alarm when K3 is cold!

Villy Nielsen
 

Good day.

Reason might be humidity in your case

73

OZ1AAR, Villy


2013/1/17 Bill Maddock <n4zi96@...>

 

Gentlemen,
 
I still have one K3 bug that needs to be resolved! It appears that my K3’s are sensitive to temperature specifically “Cold” temps. It appears

to be an issue with the final amplifier. When the rig is cold – yes I mean cold about 5 degrees C the other day 40 F , I will get a High Temp

Warning and it will cut my power back to 12 watts or less! It is very consistent and happens everytime I got out and turn on a cold radio! I have

found that if I monitor the PA temp and put the radio in “Tune” and bring power up slowly to 100 allowing the PA temp to reach about 40C, then

everything will be fine and radio works normally from that point forward as long as it doesn’t cool down! Have you ever seen this? I guess most

hams don’t have their radios out in a cold environment, but I do!

Thanks and 73,

Bill N4ZI Munford, TN




--
Vy 73
de OZ1AAR, Villy


Re: [Elecraft_K3] Re: Noise from K3 100W amplifier

mikerodgerske5gbc
 

That's a relief, well sorta. 

73
Mike R

Play me some fiddle, but no stinkin' violin!

Amateur/Ham Radio KE5GBC
HF & Echolink mobile

On Jan 17, 2013, at 4:02 AM, Jim <jim.france@...> wrote:

 

Fortunately the K3 100W amplifier was not at fault. The problem was
caused by noise from a hefty 40 amp linear PSU which had given
impeccable service for several years. Jim G3KAF


Re: [Elecraft_K3] Noise from K3 100W amplifier

John Lemay
 

Hello Jim

 

Two suggestions :-

 

You might have some RF feedback which is getting into your rig. See if it happens on all bands or not, and see what happens on a dummy load (if you can monitor using a local receiver).

 

Your power supply may be unable to supply enough current, or RF is getting into the power supply. Look closely at the volts and amps when you key down.

 

Also try disconnecting anything else that might be introducing RF into the rig, such as computer connections, if any.

 

Hope this helps

 

John G4ZTR

 

 


From: Elecraft_K3@... [mailto:Elecraft_K3@...] On Behalf Of jim.france@...
Sent: 15 January 2013 17:03
To: Elecraft_K3@...
Subject: [Elecraft_K3] Noise from K3 100W amplifier

 

When I run 10W my CW signal is perfectly clean. When I run 15W and above the 100W amplifier kicks in but my signal is reported as rough, broad and with a rasping sound. Any ideas gentlemen? Thanks Jim G3KAF




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Re: Noise from K3 100W amplifier

Jim <jim.france@...>
 

Fortunately the K3 100W amplifier was not at fault. The problem was caused by noise from a hefty 40 amp linear PSU which had given impeccable service for several years. Jim G3KAF


Re: [Elecraft_K3] Re: Falling Behind

Fred Smith <mfsj@...>
 

When I bought my first K3 no sub-receiver I still had an SDR-IQ and tried using it with the K3, had used it with the FT-5000 I had before. It worked OK but when I ordered my second K3 I knew that I wanted the sub-receiver and not an SDR for it. You lost to many things and ease of use with a SDR one being non-usability when portable because of lack of a computer. But most of all diversity receive something that I have come to use much of the time.

 

If Elecraft decided to change to a full SDR radio it would be another Flex and I for one switch radio brands again. I have a KX3 and really like it the Sherwood #'s are higher than the K3 but after changing it into the second position in my SO2R setup can say in tough conditions it can "Not" match the K3 nor should it the numbers don't tell it all the story in the real world.

 

73,

Fred/N0AZZ

 

From: Elecraft_K3@... [mailto:Elecraft_K3@...] On Behalf Of Joe Subich, W4TV
Sent: Wednesday, January 16, 2013 9:09 PM
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] Re: Falling Behind

 

 


> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14
> will rival the Perseus SDR. The Perseus is #5 on Sherwood
> Engineering's list.

SDR-14 and Perseus are not even in the same league. Perseus is spec'd
for > 100dB dynamic range vs. 90 for the SDR-14. Perseus is an 80Ms/s
vs. 66 MS/s for the SDR-14. Perseus has a 30 dBm 3rd order intercept
vs. 15 dBm for the SDR-14.

> The only problem is, it doesn't have a front panel and the virtual
> controls are on a computer screen in stead of a knob that you can
> grab, you use the mouse wheel to change a digit on the SpectraVue
> tuning control.

It would take a lot more computing power than the K3's controller to
provide a "real radio" interface for a DDR like any of the SDR-IQ/14,
Perseus, etc. Bending a DDC to a conventional interface would also
negate most of the best features of DDC
.
73,

... Joe, W4TV

On 1/16/2013 5:16 PM, wa9fvp wrote:
> I use an RF-Space SDR-14 in conjunction with my K3, the SpectraVue software supports the K3 and I can have 3 receivers. The SDR-14 locks on the K3's 8.215 MHz I.F. and the spectrum/waterfall tracks the K3's frequency. ON my PC I can mouse click on the waterfall and the K3 jumps to that frequency. When I tune or change bands on the K3, the spectrum/waterfall follows the K3's frequency.
>
> Because it interfaced so well with the K3, I didn't buy the KRX3 sub receiver and there's LO interference from the SDR-14
>
> I can also separate the SDR-14 from the K3 and use as a stand-alone receiver. The only problem is, it doesn't have a front panel and the virtual controls are on a computer screen in stead of a knob that you can grab, you use the mouse wheel to change a digit on the SpectraVue tuning control.
>
> I'm not saying that Electraft should drop the KRX3, I'm just suggesting that an SDR sub-receiver be available for the K3 for people like me that don't need two matched receivers. I'm sure it's doable.
>
> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14 will rival the Perseus SDR. The Perseus is #5 on Sherwood Engineering's list.
>
>
>
> --- In Elecraft_K3@..., george fritkin wrote:
>>
>> Falling behind? I wonder how many people on this net have other high end radios to do real world comparisons.  The numbers, at the highest performance levels get so close you have to consider measurement accuracies, environment, and other ambient conditions.
>> Â
>> The K3 and the ORIONll set the standards for me. The FTDX5000 and 9K ergonomics are radio killers. I won't even comment on the ICOMs.
>> Â
>> We guys that are fortunate to have and play with a lot of radio know what I am taking about.
>> Â
>> George, W6GF
>>
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>


Fw: [Elecraft_K3] Re: Falling Behind

Richard Fjeld <rpfjeld@...>
 

Whoops.  That should read ANAN-10.
 
 

----- Original Message -----
Sent: Thursday, January 17, 2013 12:57 AM
Subject: Re: [Elecraft_K3] Re: Falling Behind

 

Someone has mentioned the ANAN-100 SDR.  Has anyone in this group purchased one yet?  If so, would you care to comment please?  I have read eHam reviews, but I'd like to hear from someone in this group.  One website indicated it is made in India.  Sometimes one has to explore to find how good he has it.
 
Rich, n0ce
 
----- Original Message -----
Sent: Wednesday, January 16, 2013 9:09 PM
Subject: Re: [Elecraft_K3] Re: Falling Behind

 


> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14
> will rival the Perseus SDR. The Perseus is #5 on Sherwood
> Engineering's list.

SDR-14 and Perseus are not even in the same league. Perseus is spec'd
for > 100dB dynamic range vs. 90 for the SDR-14. Perseus is an 80Ms/s
vs. 66 MS/s for the SDR-14. Perseus has a 30 dBm 3rd order intercept
vs. 15 dBm for the SDR-14.

> The only problem is, it doesn't have a front panel and the virtual
> controls are on a computer screen in stead of a knob that you can
> grab, you use the mouse wheel to change a digit on the SpectraVue
> tuning control.

It would take a lot more computing power than the K3's controller to
provide a "real radio" interface for a DDR like any of the SDR-IQ/14,
Perseus, etc. Bending a DDC to a conventional interface would also
negate most of the best features of DDC
.
73,

... Joe, W4TV

On 1/16/2013 5:16 PM, wa9fvp wrote:
> I use an RF-Space SDR-14 in conjunction with my K3, the SpectraVue software supports the K3 and I can have 3 receivers. The SDR-14 locks on the K3's 8.215 MHz I.F. and the spectrum/waterfall tracks the K3's frequency. ON my PC I can mouse click on the waterfall and the K3 jumps to that frequency. When I tune or change bands on the K3, the spectrum/waterfall follows the K3's frequency.
>
> Because it interfaced so well with the K3, I didn't buy the KRX3 sub receiver and there's LO interference from the SDR-14
>
> I can also separate the SDR-14 from the K3 and use as a stand-alone receiver. The only problem is, it doesn't have a front panel and the virtual controls are on a computer screen in stead of a knob that you can grab, you use the mouse wheel to change a digit on the SpectraVue tuning control.
>
> I'm not saying that Electraft should drop the KRX3, I'm just suggesting that an SDR sub-receiver be available for the K3 for people like me that don't need two matched receivers. I'm sure it's doable.
>
> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14 will rival the Perseus SDR. The Perseus is #5 on Sherwood Engineering's list.
>
>
>
> --- In Elecraft_K3@..., george fritkin wrote:
>>
>> Falling behind? I wonder how many people on this net have other high end radios to do real world comparisons.  The numbers, at the highest performance levels get so close you have to consider measurement accuracies, environment, and other ambient conditions.
>> Â
>> The K3 and the ORIONll set the standards for me. The FTDX5000 and 9K ergonomics are radio killers. I won't even comment on the ICOMs.
>> Â
>> We guys that are fortunate to have and play with a lot of radio know what I am taking about.
>> Â
>> George, W6GF
>>
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>


Re: [Elecraft_K3] Re: Falling Behind

Richard Fjeld <rpfjeld@...>
 

Someone has mentioned the ANAN-100 SDR.  Has anyone in this group purchased one yet?  If so, would you care to comment please?  I have read eHam reviews, but I'd like to hear from someone in this group.  One website indicated it is made in India.  Sometimes one has to explore to find how good he has it.
 
Rich, n0ce
 

----- Original Message -----
Sent: Wednesday, January 16, 2013 9:09 PM
Subject: Re: [Elecraft_K3] Re: Falling Behind

 


> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14
> will rival the Perseus SDR. The Perseus is #5 on Sherwood
> Engineering's list.

SDR-14 and Perseus are not even in the same league. Perseus is spec'd
for > 100dB dynamic range vs. 90 for the SDR-14. Perseus is an 80Ms/s
vs. 66 MS/s for the SDR-14. Perseus has a 30 dBm 3rd order intercept
vs. 15 dBm for the SDR-14.

> The only problem is, it doesn't have a front panel and the virtual
> controls are on a computer screen in stead of a knob that you can
> grab, you use the mouse wheel to change a digit on the SpectraVue
> tuning control.

It would take a lot more computing power than the K3's controller to
provide a "real radio" interface for a DDR like any of the SDR-IQ/14,
Perseus, etc. Bending a DDC to a conventional interface would also
negate most of the best features of DDC
.
73,

... Joe, W4TV

On 1/16/2013 5:16 PM, wa9fvp wrote:
> I use an RF-Space SDR-14 in conjunction with my K3, the SpectraVue software supports the K3 and I can have 3 receivers. The SDR-14 locks on the K3's 8.215 MHz I.F. and the spectrum/waterfall tracks the K3's frequency. ON my PC I can mouse click on the waterfall and the K3 jumps to that frequency. When I tune or change bands on the K3, the spectrum/waterfall follows the K3's frequency.
>
> Because it interfaced so well with the K3, I didn't buy the KRX3 sub receiver and there's LO interference from the SDR-14
>
> I can also separate the SDR-14 from the K3 and use as a stand-alone receiver. The only problem is, it doesn't have a front panel and the virtual controls are on a computer screen in stead of a knob that you can grab, you use the mouse wheel to change a digit on the SpectraVue tuning control.
>
> I'm not saying that Electraft should drop the KRX3, I'm just suggesting that an SDR sub-receiver be available for the K3 for people like me that don't need two matched receivers. I'm sure it's doable.
>
> I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14 will rival the Perseus SDR. The Perseus is #5 on Sherwood Engineering's list.
>
>
>
> --- In Elecraft_K3@..., george fritkin wrote:
>>
>> Falling behind? I wonder how many people on this net have other high end radios to do real world comparisons.  The numbers, at the highest performance levels get so close you have to consider measurement accuracies, environment, and other ambient conditions.
>> Â
>> The K3 and the ORIONll set the standards for me. The FTDX5000 and 9K ergonomics are radio killers. I won't even comment on the ICOMs.
>> Â
>> We guys that are fortunate to have and play with a lot of radio know what I am taking about.
>> Â
>> George, W6GF
>>
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>


Re: (K3) Any K3 Owners running WSPR Program??

k7kev
 

Paul,
 
Shut down HRD when you are WSPRing.  If WSPR needs the serial port, it is not going to work right if any other program is trying to control your K3. 
 
If you find that you simply MUST have more than one program control the K3 at the same time, look into LP_Bridge by Larry Phipps, N8LP at http://www.telepostinc.com/.  I use it for several programs, but I don't use it for WSPR.  I'm not sure if WSPR is compatible with LP_Bridge-- looks like you will become the expert on the subject once you find out.
 
Good luck,
 
Keith
K7KEV
 


Re: [Elecraft_K3] Noise from K3 100W amplifier

w7aqk
 

What does that tell you about your amp?

 

Dave W7AQK

 

 

 


From: Elecraft_K3@... [mailto:Elecraft_K3@...] On Behalf Of jim.france@...
Sent: Tuesday, January 15, 2013 10:03 AM
To: Elecraft_K3@...
Subject: [Elecraft_K3] Noise from K3 100W amplifier

 

 

When I run 10W my CW signal is perfectly clean. When I run 15W and above the 100W amplifier kicks in but my signal is reported as rough, broad and with a rasping sound. Any ideas gentlemen? Thanks Jim G3KAF


Re: [Elecraft_K3] Falling Behind

Mark <n2qt@...>
 

Absolutely correct!

Mark. N2QT

On Jan 16, 2013, at 4:48 AM, "G3YYD" <g3yyd@btinternet.com> wrote:

Rob's message is interesting. I have concluded that with the K3 receiver performance had reached the point where further improvement to receiver dynamic range is not going to increase the number of QSOs.

The time has come to acknowledge that our real problems today are with the transmit side of the transceiver. This is the area where we need to be apply pressure for improvement.

State of the art transmitters can have IMD and ALC induced artefacts well below -50dB outside the minimum required modulation bandwidth.

The K3 CW signal bandwidth is good. The ALC is very good, The SSB IMD at 100 watts is poor especially on the higher bands and is even worse at 10 watts. The FSK bandwidth is really excessive and should be fixed with a DSP firmware upgrade.
See this URL http://www.frontiernet.net/~aflowers/k3rtty/k3rtty.html#FSK%20Excitation and scroll down to look at the K3 spectrum, on FSK. Then compare it with other AFSK spectra.

Bob on transmit measurement given the popularity of RTTY contesting, is it not time to measure FSK bandwidth alongside SSB& CW bandwidth, IMD and other artefacts?

73 David G3YYD



------------------------------------

Yahoo! Groups Links



Re: [Elecraft_K3] Re: Falling Behind

Joe Subich, W4TV
 

I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14
will rival the Perseus SDR. The Perseus is #5 on Sherwood
Engineering's list.
SDR-14 and Perseus are not even in the same league. Perseus is spec'd
for > 100dB dynamic range vs. 90 for the SDR-14. Perseus is an 80Ms/s
vs. 66 MS/s for the SDR-14. Perseus has a 30 dBm 3rd order intercept
vs. 15 dBm for the SDR-14.

The only problem is, it doesn't have a front panel and the virtual
controls are on a computer screen in stead of a knob that you can
grab, you use the mouse wheel to change a digit on the SpectraVue
tuning control.
It would take a lot more computing power than the K3's controller to
provide a "real radio" interface for a DDR like any of the SDR-IQ/14,
Perseus, etc. Bending a DDC to a conventional interface would also
negate most of the best features of DDC
.
73,

... Joe, W4TV


On 1/16/2013 5:16 PM, wa9fvp wrote:
I use an RF-Space SDR-14 in conjunction with my K3, the SpectraVue software supports the K3 and I can have 3 receivers. The SDR-14 locks on the K3's 8.215 MHz I.F. and the spectrum/waterfall tracks the K3's frequency. ON my PC I can mouse click on the waterfall and the K3 jumps to that frequency. When I tune or change bands on the K3, the spectrum/waterfall follows the K3's frequency.

Because it interfaced so well with the K3, I didn't buy the KRX3 sub receiver and there's LO interference from the SDR-14

I can also separate the SDR-14 from the K3 and use as a stand-alone receiver. The only problem is, it doesn't have a front panel and the virtual controls are on a computer screen in stead of a knob that you can grab, you use the mouse wheel to change a digit on the SpectraVue tuning control.

I'm not saying that Electraft should drop the KRX3, I'm just suggesting that an SDR sub-receiver be available for the K3 for people like me that don't need two matched receivers. I'm sure it's doable.

I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14 will rival the Perseus SDR. The Perseus is #5 on Sherwood Engineering's list.



--- In Elecraft_K3@yahoogroups.com, george fritkin wrote:

Falling behind?� I wonder how many people on this net have other high end radios to do real world comparisons.� � The numbers, at the highest performance levels� get so close you have to consider measurement accuracies, environment, and other ambient conditions.
�
The K3 and the ORIONll set the standards for me.� The FTDX5000 and 9K ergonomics are radio killers.� I won't even comment on the ICOMs.
�
We guys that are fortunate to have and play with a lot of radio� know what I am taking about.
�
George, W6GF




------------------------------------

Yahoo! Groups Links




Re: [Elecraft_K3] Falling Behind

matt zilmer
 

Hi George,

Man, I just *hate* it when someone beats me to a good idea!  :)

matt W6NIA



To: Elecraft_K3@...
From: georgefritkin@...
Date: Wed, 16 Jan 2013 12:47:22 -0800
Subject: Re: [Elecraft_K3] Falling Behind

 

Since Elecraft is falling behind, I decided to start an Elecraft museum.  Please send to me all of your of fallen behind products.  The museum will be at my QTH which is good in QRZ.  I am particularly interested in any K3s which now to all horrors has fallen to #4 on the "Sacred Sherwood Chart".

George, W6GF


From: "Joe Subich, W4TV"
To: Elecraft_K3@...
Sent: Wednesday, January 16, 2013 9:10 AM
Subject: Re: [Elecraft_K3] Falling Behind

 

> Who says the SDR part has to be QSD?

The message to which I was responding specifically mentioned the
KX3 which is a QSD receiver.

> A DDC would work nicely,

Use of a DDC is another matter entirely but I would hope that Elecraft
will not do anything than would lessen the effectiveness of diversity
operation. That means starting over with DDC in *both* receivers and
is just a bit more than designing a replacement for the KRX3.

While I suspect there is still plenty of life left in downconversion
designs - particularly with further attention to mixer, IF and ADC
design - there is nothing wrong with DDC as long as care is taken to
maintain dynamic range and minimize latency. For example, I do not
know believe anyone has yet demonstrated clean QSK at high speeds with
a DDC based platform.

73,

... Joe, W4TV

On 1/16/2013 2:55 AM, WB4JFI wrote:
>
>
> From: Joe Subich, W4TV
> Sent: Tuesday, January 15, 2013 10:56 PM
> To: Elecraft_K3@...
> Subject: Re: [Elecraft_K3] Falling Behind
>
>
>
> On 1/15/2013 10:07 PM, wa9fvp wrote:
>> How about an SDR style sub receiver kit for the
>> K3 with the same performance as the KX3?
>
> I hope not. That would kill diversity operation and result in
> both inferior opposite sideband rejection and significant self-
> interference due to "LO" leakage from the "direct conversion"
> receiver. Not to mention the lack of a "line out" from the
> "KXR3".
>
> 73,
>
> ... Joe, W4TV
>
>
> Who says the SDR part has to be QSD? A DDC would work nicely, provide even better opposite sideband suppression, and NO carrier leakage, since there is no real-world carrier generated (just numbers in the freq. converter). Of course, it WOULD kill diversity, since the two receiver chains would be different. And the SDR would encounter more delays... and more expense. Just remember: there is more to SDR than QSDs.
> Terry, WB4JFI
>
>




High Temp alarm when K3 is cold!

Bill Maddock
 

Gentlemen,
 
I still have one K3 bug that needs to be resolved! It appears that my K3’s are sensitive to temperature specifically “Cold” temps. It appears

to be an issue with the final amplifier. When the rig is cold – yes I mean cold about 5 degrees C the other day 40 F , I will get a High Temp

Warning and it will cut my power back to 12 watts or less! It is very consistent and happens everytime I got out and turn on a cold radio! I have

found that if I monitor the PA temp and put the radio in “Tune” and bring power up slowly to 100 allowing the PA temp to reach about 40C, then

everything will be fine and radio works normally from that point forward as long as it doesn’t cool down! Have you ever seen this? I guess most

hams don’t have their radios out in a cold environment, but I do!

Thanks and 73,

Bill N4ZI Munford, TN


Re: [Elecraft_K3] Falling Behind

Jim Bo <jbollit@...>
 


Fact is fact.
 
The K3 is dated.
 
Superhetrodyne with low frequency digital processing.
 
Also, fact is the market is not demanding more, of course with $ to back up the demand.
 
After the first 125 dB, the next twenty are not as "important".
 
Kinda like audio "distortion" at 0.001% THD versus 0.0001% THD
 
Jim
WA9ZBV
 
 

----- Original Message -----
From: WB4JFI
Sent: Wednesday, January 16, 2013 12:57 PM
Subject: Re: [Elecraft_K3] Falling Behind

 

Just to be clear:
WB4JFI was not the one suggesting that the K3 is falling behind – I was responding to someone else.  The K3 that I have is the best radio that I have ever owned.  That it is consistently at/near the top  of performance measurements, and that so many DXpeditions use them, is a true testament.
 
I also have a KX3, and so far it has exceeded my expectations as well.  How they stuffed so much radio into such a small package is magic!
 
(and Joe, I agree with your previous replies)
73, Terry, WB4JFI
 
 
Sent: Wednesday, January 16, 2013 11:47 AM
Subject: Re: [Elecraft_K3] Falling Behind
 
 

Falling behind?  I wonder how many people on this net have other high end radios to do real world comparisons.   The numbers, at the highest performance levels  get so close you have to consider measurement accuracies, environment, and other ambient conditions.
 
The K3 and the ORIONll set the standards for me.  The FTDX5000 and 9K ergonomics are radio killers.  I won't even comment on the ICOMs.
 
We guys that are fortunate to have and play with a lot of radio  know what I am taking about.
 
George, W6GF
 
From: WB4JFI <wb4jfi@...>
To: Elecraft_K3@...
Sent: Tuesday, January 15, 2013 11:55 PM
Subject: Re: [Elecraft_K3] Falling Behind
 
 
 
Sent: Tuesday, January 15, 2013 10:56 PM
Subject: Re: [Elecraft_K3] Falling Behind
 
 

On 1/15/2013 10:07 PM, wa9fvp wrote:
> How about an SDR style sub receiver kit for the
> K3 with the same performance as the KX3?

I hope not. That would kill diversity operation and result in
both inferior opposite sideband rejection and significant self-
interference due to "LO" leakage from the "direct conversion"
receiver. Not to mention the lack of a "line out" from the
"KXR3".

73,

... Joe, W4TV


High Temp warning when Cold!

Bill Maddock
 

 Gentlemen,
 
I still have one K3 bug that needs to be resolved! It appears that my K3’s are sensitive to temperature specifically “Cold” temps. It appears

to be an issue with the final amplifier. When the rig is cold – yes I mean cold about 5 degrees C the other day 40 F , I will get a High Temp

Warning and it will cut my power back to 12 watts or less! It is very consistent and happens everytime I got out and turn on a cold radio! I have

found that if I monitor the PA temp and put the radio in “Tune” and bring power up slowly to 100 allowing the PA temp to reach about 40C, then

everything will be fine and radio works normally from that point forward as long as it doesn’t cool down! Have you ever seen this? I guess most

hams don’t have their radios out in a cold environment, but I do!

Thanks and 73,

Bill N4ZI Munford, TN


Re: Falling Behind

wa9fvp <willcoele@...>
 

I use an RF-Space SDR-14 in conjunction with my K3, the SpectraVue software supports the K3 and I can have 3 receivers. The SDR-14 locks on the K3's 8.215 MHz I.F. and the spectrum/waterfall tracks the K3's frequency. ON my PC I can mouse click on the waterfall and the K3 jumps to that frequency. When I tune or change bands on the K3, the spectrum/waterfall follows the K3's frequency.

Because it interfaced so well with the K3, I didn't buy the KRX3 sub receiver and there's LO interference from the SDR-14

I can also separate the SDR-14 from the K3 and use as a stand-alone receiver. The only problem is, it doesn't have a front panel and the virtual controls are on a computer screen in stead of a knob that you can grab, you use the mouse wheel to change a digit on the SpectraVue tuning control.

I'm not saying that Electraft should drop the KRX3, I'm just suggesting that an SDR sub-receiver be available for the K3 for people like me that don't need two matched receivers. I'm sure it's doable.

I haven't compaired the K3 with the SDR-14 but I'm sure the SDR-14 will rival the Perseus SDR. The Perseus is #5 on Sherwood Engineering's list.

--- In Elecraft_K3@yahoogroups.com, george fritkin wrote:

Falling behind?  I wonder how many people on this net have other high end radios to do real world comparisons.   The numbers, at the highest performance levels  get so close you have to consider measurement accuracies, environment, and other ambient conditions.
 
The K3 and the ORIONll set the standards for me.  The FTDX5000 and 9K ergonomics are radio killers.  I won't even comment on the ICOMs.
 
We guys that are fortunate to have and play with a lot of radio  know what I am taking about.
 
George, W6GF

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