Elecraft

KX3 and the Sigmalink USB

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TerryB

KX3 and the Sigmalink USB

The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
has a DC blocking capacitor built in.

Can anyone tell me where it is in the circuit and a value? It eliminates
turning off the mike bias in the menu when using the Signalink USB. I am
just using jumpers and would like to put in the capacitor to eliminate
having to turn off mike bias and having to remember to turn it back on.
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Bob McGraw - K4TAX

Re: KX3 and the Sigmalink USB

If you look at the jumper configuration in Fig 2 & 3 of the Signalink
USB documentation, you can insert the capacitor, in place of the
jumper, between the MIC pin on JP1 and the corresponding Mic Input
terminal on JP1. A 0.1 mfd 50 V disk ceramic should be very
adequate. That will block the DC bias from the radio and keep it from
saturating the output transformer T2

The schematic is available at this link.

http://www.frenning.dk/OZ1PIF_HOMEPAGE/images/Tigertronics%20Signalink%20USB%20Schematic%20v1p2.pdf

73

Bob, K4TAX

On 6/8/2019 12:47 PM, Terry Basom wrote:

> The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
> has a DC blocking capacitor built in.
>
> Can anyone tell me where it is in the circuit and a value? It eliminates
> turning off the mike bias in the menu when using the Signalink USB. I am
> just using jumpers and would like to put in the capacitor to eliminate
> having to turn off mike bias and having to remember to turn it back on.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
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Neil Zampella

Re: KX3 and the Sigmalink USB

In reply to this post by TerryB

FWIW... you don't need a signalink to connect the KX3 for digital modes.

All you need is the KXUSB cable for CAT control (& PTT), and 3.5 cables
for the MIC and PHONO jackts to the Line out/speakers and line in on the
computer.

Very simple, and no having to worry about switching about jumpers or
adding capacitors.

Neil, KN3ILZ

On 6/8/2019 1:47 PM, Terry Basom wrote:
> The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
> has a DC blocking capacitor built in.
>
> Can anyone tell me where it is in the circuit and a value? It eliminates
> turning off the mike bias in the menu when using the Signalink USB. I am
> just using jumpers and would like to put in the capacitor to eliminate
> having to turn off mike bias and having to remember to turn it back on.
>

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Nr4c

Re: KX3 and the Sigmalink USB

Yes, but you still must turn OFF bias and BTNS.

This arrangement works very well. I like to put a spitter in the phones jack with one end to computer the other for ear buds so I can monitor the radio audio. Elecraft still hasn’t added a feature to have phones plus speaker as in the K-Line.

Sent from my iPhone
...nr4c. bill

> On Jun 9, 2019, at 8:24 AM, Neil Zampella <[hidden email]> wrote:
>
> FWIW... you don't need a signalink to connect the KX3 for digital modes.
>
> All you need is the KXUSB cable for CAT control (& PTT), and 3.5 cables
> for the MIC and PHONO jackts to the Line out/speakers and line in on the
> computer.
>
> Very simple, and no having to worry about switching about jumpers or
> adding capacitors.
>
> Neil, KN3ILZ
>
>> On 6/8/2019 1:47 PM, Terry Basom wrote:
>> The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
>> has a DC blocking capacitor built in.
>>
>> Can anyone tell me where it is in the circuit and a value? It eliminates
>> turning off the mike bias in the menu when using the Signalink USB. I am
>> just using jumpers and would like to put in the capacitor to eliminate
>> having to turn off mike bias and having to remember to turn it back on.
>>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.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]

Bob McGraw - K4TAX

Re: KX3 and the Sigmalink USB

The Signalink USB has a monitor jack. Thus one can plug in headphones on the back of the unit. And using a 0.1 cap in place of the internal jumper in the unit eliminates the need to turn off bias.

Seems all of your concerns are resolved.

Bob, K4TAX

Sent from my iPhone

> On Jun 9, 2019, at 10:25 PM, Nr4c <[hidden email]> wrote:
>
> Yes, but you still must turn OFF bias and BTNS.
>
> This arrangement works very well. I like to put a spitter in the phones jack with one end to computer the other for ear buds so I can monitor the radio audio. Elecraft still hasn’t added a feature to have phones plus speaker as in the K-Line.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Jun 9, 2019, at 8:24 AM, Neil Zampella <[hidden email]> wrote:
>>
>> FWIW... you don't need a signalink to connect the KX3 for digital modes.
>>
>> All you need is the KXUSB cable for CAT control (& PTT), and 3.5 cables
>> for the MIC and PHONO jackts to the Line out/speakers and line in on the
>> computer.
>>
>> Very simple, and no having to worry about switching about jumpers or
>> adding capacitors.
>>
>> Neil, KN3ILZ
>>
>>> On 6/8/2019 1:47 PM, Terry Basom wrote:
>>> The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
>>> has a DC blocking capacitor built in.
>>>
>>> Can anyone tell me where it is in the circuit and a value? It eliminates
>>> turning off the mike bias in the menu when using the Signalink USB. I am
>>> just using jumpers and would like to put in the capacitor to eliminate
>>> having to turn off mike bias and having to remember to turn it back on.
>>>
>>
>> ---
>> This email has been checked for viruses by AVG.
>> https://www.avg.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]
>
> ______________________________________________________________
> 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
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Neil Zampella

Re: KX3 and the Sigmalink USB

In reply to this post by Nr4c

Why must you turn them off ... I've not touched either, and have no
problems with digital modes. I also use a USB soundcard to keep
computer sounds separate.

In DATA A, the MIC button functions are disabled. And Fred Cady, KE7Z
(SK) in his KX3 book makes no mention of having to do anything with the
bias.

As far as the speaker, I would rather not have to listen to the
cacophony of tones using WSJT-X modes, but if you need to hear it, you
can usually run the a USB soundcard's line-in through your computer
speaker or headphone jack.

Neil, KN3ILZ

On 6/9/2019 11:25 PM, Nr4c wrote:

> Yes, but you still must turn OFF bias and BTNS.
>
> This arrangement works very well. I like to put a spitter in the phones jack with one end to computer the other for ear buds so I can monitor the radio audio. Elecraft still hasn’t added a feature to have phones plus speaker as in the K-Line.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Jun 9, 2019, at 8:24 AM, Neil Zampella <[hidden email]> wrote:
>>
>> FWIW... you don't need a signalink to connect the KX3 for digital modes.
>>
>> All you need is the KXUSB cable for CAT control (& PTT), and 3.5 cables
>> for the MIC and PHONO jackts to the Line out/speakers and line in on the
>> computer.
>>
>> Very simple, and no having to worry about switching about jumpers or
>> adding capacitors.
>>
>> Neil, KN3ILZ
>>
>>> On 6/8/2019 1:47 PM, Terry Basom wrote:
>>> The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
>>> has a DC blocking capacitor built in.
>>>
>>> Can anyone tell me where it is in the circuit and a value? It eliminates
>>> turning off the mike bias in the menu when using the Signalink USB. I am
>>> just using jumpers and would like to put in the capacitor to eliminate
>>> having to turn off mike bias and having to remember to turn it back on.
>>>
>> ---
>> This email has been checked for viruses by AVG.
>> https://www.avg.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]
>