KX3 2m: how to get +TX voltage during transmission?

[Jack F6AJW]

Hello All Elecrafters,

I have a KX3 2m; I don't know how to configurate it in order to command
DB6NT microwave transverters needing +TX voltage present on SMA
connector during transmit? KX3 has already last firmware loaded.

Thanks in advance for your explanations. 73's.

Jacques F6AJW / Paris


---
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[Matt Zilmer-3]

Maybe... Use a bias T with the DC feeding torwards the transverters?
The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit
and could be used to activate a FET or bipolar switch to 12VDC.

73,
matt
W6NIA
On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:

>Hello All Elecrafters,
>
>I have a KX3 2m; I don't know how to configurate it in order to command
>DB6NT microwave transverters needing +TX voltage present on SMA
>connector during transmit? KX3 has already last firmware loaded.
>
>Thanks in advance for your explanations. 73's.
>
>Jacques F6AJW / Paris
>
>
>---
>L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
>https://www.avast.com/antivirus
>
>______________________________________________________________
>Elecraft mailing list
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>Message delivered to [hidden email]

Matt Zilmer, W6NIA
--
"Always store beer in a dark place."  -R. Heinlein

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[Cady, Fred]

Here ya go:

When in the 2M/4M menu, tap  2  to toggle between TX 5V- (the default) and TX 5V+.  When TX 5V+ is enabled, 5 VDC (± 0.3 v at 0.1 mA) is applied to the center pin of ANT 2 when transmitting.  This can be used to switch or control external devices such as additional transverters that use 144 or 70 MHz as their IF.  

Cheers and 73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
"The Elecraft KPA500 and KAT500 - the K-Line Dream Station"
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

"The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line Station" available at www.lulu.com.

"The Elecraft K3S and P3"  (A work in progress)

> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of
> Matt Zilmer
> Sent: Friday, July 03, 2015 11:47 AM
> To: Jack F6AJW
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] KX3 2m: how to get +TX voltage during
> transmission?
>
> Maybe... Use a bias T with the DC feeding torwards the transverters?
> The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit and
> could be used to activate a FET or bipolar switch to 12VDC.
>
> 73,
> matt
> W6NIA
> On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:
>
> >Hello All Elecrafters,
> >
> >I have a KX3 2m; I don't know how to configurate it in order to
> command
> >DB6NT microwave transverters needing +TX voltage present on SMA
> >connector during transmit? KX3 has already last firmware loaded.
> >
> >Thanks in advance for your explanations. 73's.
> >
> >Jacques F6AJW / Paris
> >
> >
> >---
> >L'absence de virus dans ce courrier électronique a été vérifiée par le
> logiciel antivirus Avast.
> >https://www.avast.com/antivirus
> >
> >______________________________________________________________
> >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]
> Matt Zilmer, W6NIA
> --
> "Always store beer in a dark place."  -R. Heinlein
>
> ______________________________________________________________
> 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]

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[Jack F6AJW]

Great! It works! Thank you Fred for valuable info! Thank also to Mat for
advise (usable on BNC out for lower frequencies like IF on 28 or 50 MHz) .

So, I will be QRV this afternoon (despite heat wave: 35°C!) on 10 GHz
with my KX3 as 2m IF (better than my usual FT-817ND on RX).

73's.

Jacques F6AJW/75

Le 03/07/2015 23:54, Cady, Fred a écrit :

> Here ya go:
>
> When in the 2M/4M menu, tap  2  to toggle between TX 5V- (the default) and TX 5V+.  When TX 5V+ is enabled, 5 VDC (± 0.3 v at 0.1 mA) is applied to the center pin of ANT 2 when transmitting.  This can be used to switch or control external devices such as additional transverters that use 144 or 70 MHz as their IF.
>
> Cheers and 73,
> Fred KE7X
>
> Author of:
> "The Elecraft K3: Design, Configuration and Operation 2nd ed"
> "The Elecraft KX3 - Going for the summit"
> "The Elecraft KPA500 and KAT500 - the K-Line Dream Station"
> Printed, coil bound copies of these are all available at www.elecraft.com
> KPA500 and KAT500 Quick Set Up Guide
> http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
> KAT500 and KXPA500 Tuner Operation
> http://www.ke7x.com/home/kat500-and-kxpa100-tuners
>
> "The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line Station" available at www.lulu.com.
>
> "The Elecraft K3S and P3"  (A work in progress)
>
>> -----Original Message-----
>> From: Elecraft [mailto:[hidden email]] On Behalf Of
>> Matt Zilmer
>> Sent: Friday, July 03, 2015 11:47 AM
>> To: Jack F6AJW
>> Cc: Elecraft Reflector
>> Subject: Re: [Elecraft] KX3 2m: how to get +TX voltage during
>> transmission?
>>
>> Maybe... Use a bias T with the DC feeding torwards the transverters?
>> The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit and
>> could be used to activate a FET or bipolar switch to 12VDC.
>>
>> 73,
>> matt
>> W6NIA
>> On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:
>>
>>> Hello All Elecrafters,
>>>
>>> I have a KX3 2m; I don't know how to configurate it in order to
>> command
>>> DB6NT microwave transverters needing +TX voltage present on SMA
>>> connector during transmit? KX3 has already last firmware loaded.
>>>
>>> Thanks in advance for your explanations. 73's.
>>>
>>> Jacques F6AJW / Paris
>>>
>>>
>>> ---
>>> L'absence de virus dans ce courrier électronique a été vérifiée par le
>> logiciel antivirus Avast.
>>> https://www.avast.com/antivirus
>>>
>>> ______________________________________________________________
>>> 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]
>> Matt Zilmer, W6NIA
>> --
>> "Always store beer in a dark place."  -R. Heinlein
>>
>> ______________________________________________________________
>> 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]
> ---
> L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
> https://www.avast.com/antivirus
>

---
L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
https://www.avast.com/antivirus

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