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What's best Soundcard Interface for KX3

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George_yv5wz

What's best Soundcard Interface for KX3

I'm thinking to go QRP to South of Brasil with my new KX3
and I'm looking for doing JT65
What Soundcard interface would you recommend?

I appreciate your answers

73, George, YV5WZ

Robert Nobis - N7RJN

Re: What's best Soundcard Interface for KX3

For portable operations with my KX3, I use the SignaLink USB, mainly because of its small size. There are better performing sound cards, but for compactness and ease of use the SignaLink works for me when I travel.

73,

Bob Nobis - N7RJN
[hidden email]

> On Apr 10, 2016, at 09:41, George_yv5wz <[hidden email]> wrote:
>
> I'm thinking to go QRP to South of Brasil with my new KX3
> and I'm looking for doing JT65
> What Soundcard interface would you recommend?
>
> I appreciate your answers
>
>
> 73, George, YV5WZ
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Don Wilhelm-4

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

You may not need any interface at all. You may be able to use the
internal soundcard in your computer.
If you do that, turn off sounds generated by your computer OS.
The other alternative is an inexpensive external soundcard.
Use VOX to transmit instead of PTT. It simplifies the connections.

73,
Don W3FPR

On 4/10/2016 12:41 PM, George_yv5wz wrote:
> I'm thinking to go QRP to South of Brasil with my new KX3
> and I'm looking for doing JT65
> What Soundcard interface would you recommend?
>
>

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George_yv5wz

Re: What's best Soundcard Interface for KX3

Thank you Don!

So you mean I don't need to buy anything just my laptop....that's interesting!

however, I'm kind of confuse....why so many brands of expensive interface sound card....does it represent any better signal or any using interface ?....I mean 100 Box (signlink) against simple USB soundcard (12 box) .....does it really matter?

Matt Zilmer-3

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

My whole KX3 station, antenna wire and all, fits in an ammo can. The
Creative Labs SB X-Fi Go! fits in just fine along with a couple of 3.5mm
m-m cables. The X-Fi is a small USB dongle, about the size of a flash
drive. It's a good compromise between size and performance, and it
isn't expensive.

73!

matt W6NIA

On 4/10/2016 9:41 AM, George_yv5wz wrote:

> I'm thinking to go QRP to South of Brasil with my new KX3
> and I'm looking for doing JT65
> What Soundcard interface would you recommend?
>
> I appreciate your answers
>
>
> 73, George, YV5WZ
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
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Don Wilhelm-4

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

You laptop may have only a mono input for the mic/line-in, but for
digital modes, only one channel is used, so it should work - just be
sure to turn off sounds from your OS so those are not transmitted on the
air.

A simple and inexpensive USB soundcard can eliminate the problem of
sounds from the OS. Just make certain the USB soundcard is *not* the
default sound device.

For digital modes, you do not need an expensive interface. Yes, some
provide ready made cables to connect with your radio, some have galvanic
isolation on the audio lines, and some provide PTT to the transceiver,
but VOX works just great with the KX3 for digital modes (you don't need
PTT).

The big difference between soundcards (including those built into
interface boxes) for digital modes is the noise floor of the soundcard.
You mentioned Signalink, and while popular, it is not the best interface
available.

Try your laptop internal soundcard before buying anything else, it may
be all you need.

73,
Don W3FPR

On 4/10/2016 2:09 PM, George_yv5wz wrote:

> Thank you Don!
>
> So you mean I don't need to buy anything just my laptop....that's
> interesting!
>
> however, I'm kind of confuse....why so many brands of expensive interface
> sound card....does it represent any better signal or any using interface
> ?....I mean 100 Box (signlink) against simple USB soundcard (12 box)
> .....does it really matter?
>
>

Robert Nobis - N7RJN

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

Many laptops do not have a good quality built-in sound cards. Their performance for very weak signals typically is not as good as using an external sound card. You might want to test your internal PC sound card before you go to Brazil. If your internal sound card is able to consistently decode JT65 signals at levels below -19dB (for example -20 to -26 dB) it is probably acceptable.

You might wish to review Jim Brown’s (K9YC) Tutorial on sound cards: http://k9yc.com/USB_Interfaces.pdf

73,

Bob Nobis - N7RJN
[hidden email]

> On Apr 10, 2016, at 11:09, George_yv5wz <[hidden email]> wrote:
>
> Thank you Don!
>
> So you mean I don't need to buy anything just my laptop....that's
> interesting!
>
> however, I'm kind of confuse....why so many brands of expensive interface
> sound card....does it represent any better signal or any using interface
> ?....I mean 100 Box (signlink) against simple USB soundcard (12 box)
> .....does it really matter?
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157p7616162.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
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> Please help support this email list: http://www.qsl.net/donate.html
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>

John Pitz

Re: What's best Soundcard Interface for KX3

In reply to this post by Don Wilhelm-4

On the topic of sound cards, I was wondering what the advantages are to
using the IQ output of the KX3 as opposed to feeding the headphone jack
into the input of the soundcard? I believe the IQ output requires
stereo input to work, but what are the advantages? I have seen on this
list quite a few people with radios that have an IQ output still use the
headphone output to decode the digital modes. I am under the impression
that the PX3 can display a 200KHz slice of the RF spectrum using the IQ
outputs whereas the best I can get out of fldigi is about 4KHz. Is
there any way to coerce fldigi to display a wider chunk of the band? I
am running fldigi on Linux.

John
KD8CIV

On Sun, 2016-04-10 at 14:56 -0400, Don Wilhelm wrote:

> George,
>
> You laptop may have only a mono input for the mic/line-in, but for
> digital modes, only one channel is used, so it should work - just be
> sure to turn off sounds from your OS so those are not transmitted on the
> air.
>
> A simple and inexpensive USB soundcard can eliminate the problem of
> sounds from the OS. Just make certain the USB soundcard is *not* the
> default sound device.
>
> For digital modes, you do not need an expensive interface. Yes, some
> provide ready made cables to connect with your radio, some have galvanic
> isolation on the audio lines, and some provide PTT to the transceiver,
> but VOX works just great with the KX3 for digital modes (you don't need
> PTT).
>
> The big difference between soundcards (including those built into
> interface boxes) for digital modes is the noise floor of the soundcard.
> You mentioned Signalink, and while popular, it is not the best interface
> available.
>
> Try your laptop internal soundcard before buying anything else, it may
> be all you need.
>
> 73,
> Don W3FPR
>
> On 4/10/2016 2:09 PM, George_yv5wz wrote:
> > Thank you Don!
> >
> > So you mean I don't need to buy anything just my laptop....that's
> > interesting!
> >
> > however, I'm kind of confuse....why so many brands of expensive interface
> > sound card....does it represent any better signal or any using interface
> > ?....I mean 100 Box (signlink) against simple USB soundcard (12 box)
> > .....does it really matter?
> >
> >
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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>

Don Wilhelm-4

Re: What's best Soundcard Interface for KX3

John,

That is mixing apples and oranges.
The RX I/Q is a quadrature output that can be used as input to a
panadapter software application or to the PX3. Yes, it requires stereo
for those applications.
They can display up to a 200 kHz slice of the band (if the bandwidth of
the soundcard is great enough) and can produce either a real time
spectrum display or a waterfall (signals over time) or both.
That is *only* display - there is no decoding of signals.

Decoding of digital mode signals requires only one channel to an
application for decoding (and transmitting) the audio tones of the
transceiver output when that transceiver is tuned to one or more digital
stations. The main purpose of that software application is to decode
digital signals.
Yes, those applications contain a waterfall display so you can identify
a particular station and click on it to tune to it (and decode it).

Theoretically, one channel of the RX I/Q could be routed to the digital
software application running on the computer, but the bandwidth would be
restricted to whatever width that application is designed to handle
(4kHz or less).
But, the problem is the level available from the RX I/Q is too low to
adequately drive those software applications.

So bottom line -- if you are using a digital mode software application,
use the headphone output to drive one channel of the soundcard
(typically the left channel). If you are driving a soundcard for a
panadapter display, use the RX I/Q output.

73,
Don W3FPR

On 4/10/2016 4:12 PM, John Pitz wrote:

Kevin Stover

Re: What's best Soundcard Interface for KX3

In reply to this post by John Pitz

The IQ outputs are for displaying the received spectrum on a pan adapter
like the PX3 or other spectrum display software like NaP3 through the
sound card in the computer.
The audio output at the headphone jack is for feeding audio to digital
mode software like FLDigi or MixW to work modes like PSK31, RTTY and
JT65/9. FLDigi, MixW, or WSJT/x wouldn't know what to do with an IQ output.

On 4/10/2016 3:12 PM, John Pitz wrote:

> On the topic of sound cards, I was wondering what the advantages are to
> using the IQ output of the KX3 as opposed to feeding the headphone jack
> into the input of the soundcard? I believe the IQ output requires
> stereo input to work, but what are the advantages? I have seen on this
> list quite a few people with radios that have an IQ output still use the
> headphone output to decode the digital modes. I am under the impression
> that the PX3 can display a 200KHz slice of the RF spectrum using the IQ
> outputs whereas the best I can get out of fldigi is about 4KHz. Is
> there any way to coerce fldigi to display a wider chunk of the band? I
> am running fldigi on Linux.
>
>
> John
> KD8CIV
>
> On Sun, 2016-04-10 at 14:56 -0400, Don Wilhelm wrote:
>
>> George,
>>
>> You laptop may have only a mono input for the mic/line-in, but for
>> digital modes, only one channel is used, so it should work - just be
>> sure to turn off sounds from your OS so those are not transmitted on the
>> air.
>>
>> A simple and inexpensive USB soundcard can eliminate the problem of
>> sounds from the OS. Just make certain the USB soundcard is *not* the
>> default sound device.
>>
>> For digital modes, you do not need an expensive interface. Yes, some
>> provide ready made cables to connect with your radio, some have galvanic
>> isolation on the audio lines, and some provide PTT to the transceiver,
>> but VOX works just great with the KX3 for digital modes (you don't need
>> PTT).
>>
>> The big difference between soundcards (including those built into
>> interface boxes) for digital modes is the noise floor of the soundcard.
>> You mentioned Signalink, and while popular, it is not the best interface
>> available.
>>
>> Try your laptop internal soundcard before buying anything else, it may
>> be all you need.
>>
>> 73,
>> Don W3FPR
>>
>> On 4/10/2016 2:09 PM, George_yv5wz wrote:
>>> Thank you Don!
>>>
>>> So you mean I don't need to buy anything just my laptop....that's
>>> interesting!
>>>
>>> however, I'm kind of confuse....why so many brands of expensive interface
>>> sound card....does it represent any better signal or any using interface
>>> ?....I mean 100 Box (signlink) against simple USB soundcard (12 box)
>>> .....does it really matter?
>>>
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>

--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441

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geoff allsup

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

I use a Griffin iMic with my Mac with the standard accessory kit audio cables. Works great and it's simple.

Geoff - W1OH

Sent from my iPhone

Geoff Allsup, W1OH [hidden email] or [hidden email]
Senior Engineer Upper Ocean Processes Group
Woods Hole Oceanographic Institution Woods Hole, MA

> On Apr 10, 2016, at 12:41, George_yv5wz <[hidden email]> wrote:
>
> I'm thinking to go QRP to South of Brasil with my new KX3
> and I'm looking for doing JT65
> What Soundcard interface would you recommend?
>
> I appreciate your answers
>
>
> 73, George, YV5WZ
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157.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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

George_yv5wz

Re: What's best Soundcard Interface for KX3

In reply to this post by John Pitz

Thanks Don

I tried with my Laptop Soundcard and it decodes signal even -24
So I guess sound card its ok.....but when I connect Mic jack to my pc output (phones) .....it keys my KX3 (TX red led on)......I dont get it!!

George_yv5wz

Re: What's best Soundcard Interface for KX3

In reply to this post by Robert Nobis - N7RJN

Thnaks Robert
Laptop its decoding -24 signals

so I guess I'm ok... but for some reason when I connect audio Cable .....I got PPT on.....I mean just connecting plug in MIC jack and Audio....and TX red led lights on

Don Wilhelm-4

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

You are making progress, receive is good - only a little more to go to
handle the transmit situation.

The cause is because the ring contact on the microphone jack is PTT, and
the unused channel (right) of the soundcard has a sufficiently low
impedance (resistance) to trigger the PTT. If you are set up to use
VOX, you do not need PTT.

There are 2 solutions (I think the 2nd one is the best, but that is just
my opinion):
1.) Enter the menu and set MIC BTN to OFF.
Since that requires you to turn MIC BTN to ON when going back to SSB
with the MH3 microphone, I suggest #2.
2.) Build an adapter which has no connection to the 1st ring on the
microphone plug. In other words, connect the soundcard stereo plug to
only the shell and tip of another jack and use that adapter between your
soundcard audio out cable and the KX3 microphone jack. If you want to
use PTT, you can bring out the ring contact to operate from whatever
source you are deriving the PTT signal.

73,
Don W3FPR

On 4/10/2016 6:18 PM, George_yv5wz wrote:

> Thanks Don
>
> I tried with my Laptop Soundcard and it decodes signal even -24
> So I guess sound card its ok.....but when I connect Mic jack to my pc
> output (phones) .....it keys my KX3 (TX red led on)......I dont get it!!
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157p7616181.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>

Robert Nobis - N7RJN

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

That is great. -24 dB is good for a built in sound card. By the way what version of JT65 are you using?

Note that your transmit signal level is usually critical for JT65 and JT9. Also, I always use VOX to key the transmitter.

73,

Bob Nobis - N7RJN
[hidden email]

> On Apr 10, 2016, at 15:21, George_yv5wz <[hidden email]> wrote:
>
> Thnaks Robert
> Laptop its decoding -24 signals
>
> so I guess I'm ok... but for some reason when I connect audio Cable .....I
> got PPT on.....I mean just connecting plug in MIC jack and Audio....and TX
> red led lights on
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157p7616182.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
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George_yv5wz

Re: What's best Soundcard Interface for KX3

Hey Robert

Yes I think I'm ok with my Sony VPCW12AX.....probably is cause better sound device than laptop hahahaha......

I have WSJT-X v1.6.0 r6263

What are the settings for VOX?

By the way my software decode with KX3 set at USB.... I couldn't get any decode set at DATA

73's

George_yv5wz

Re: What's best Soundcard Interface for KX3

In reply to this post by Don Wilhelm-4

Don

I like better 2nd option too
but on Sunday....and 7:30 pm (local time).....I cant imagine where I may find 3.5 mm conectors

How do I set up KX3 and WSJT-x soft for VOX?

By the way I get decode with radio set at USB mode ....but nothing set at DATA mode.....any idea ?

73,

George

Robert Nobis - N7RJN

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

Not sure how to set up VOX using an internal sound card. For use with my SignaLink USB, I simply adjusted the output level of the sound card until it properly keyed the transmitter.

Also Chapter 6 in the Elect KX-3 manual covers VOX setup. See page 66.

I am also using USB rather than Data mode for decode with WSJT-X v1.7.0 dev. I have been able to consistently get decodes down as low as -26 to -27dB.

73,

Bob Nobis - N7RJN
[hidden email]

> On Apr 10, 2016, at 16:58, George_yv5wz <[hidden email]> wrote:
>
> Hey Robert
>
>
> Yes I think I'm ok with my Sony VPCW12AX.....probably is cause better sound
> device than laptop hahahaha......
>
> I have WSJT-X v1.6.0 r6263
>
> What are the settings for VOX?
>
> By the way my software decode with KX3 set at USB.... I couldn't get any
> decode set at DATA
>
>
> 73's
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157p7616188.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
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George_yv5wz

Re: What's best Soundcard Interface for KX3

hey!!!

where did you get WSJT-X v1.7.0 dev version....?

I will take a look to manual to try to set up VOX

Don Wilhelm-4

Re: What's best Soundcard Interface for KX3

In reply to this post by George_yv5wz

George,

So use the 1st option until you can get the plugs and jacks to construct
the adapter.

For VOX, just set VOX on - hold the button just to the lower left of the
VFO A knob. It is a per-mode setting.

Are you using the correct DATA sub-mode? There are 4 and you should be
using DATA A which should default to USB (If it is using the wrong
sideband, the ALT button (Hold MODE) will change the sideband.
Tap DATA a second time and rotate the VFO B knob until you see DATA A.
The advantage of DATA A over SSB is that compression is turned off and
TX EQ is turned to flat automatically.

Adjust your audio level (computer soundcard output slider and MIC Gain
until you have 4 bars solid on the ALC meter with the 5th bar flickering.
Adjust the desired power output with the PWR knob. Ignore the
conventional advice for "no ALC" on the internet and also ignore the
internat advice to adjust the power with the audio level. That advice
is for transceivers other than Elecraft. Elecraft is different than
other ham transceivers in the way power is controlled.

73,
Don W3FPR

On 4/10/2016 8:01 PM, George_yv5wz wrote:

> Don
>
> I like better 2nd option too
> but on Sunday....and 7:30 pm (local time).....I cant imagine where I may
> find 3.5 mm conectors
>
> How do I set up KX3 and WSJT-x soft for VOX?
>
> By the way I get decode with radio set at USB mode ....but nothing set at
> DATA mode.....any idea ?
>
>
> 73,
>
> George
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/What-s-best-Soundcard-Interface-for-KX3-tp7616157p7616189.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
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