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

[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:elecraft-bounces at mailman.qth.net] 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
>>>
>>>
>>> ---
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>>> https://www.avast.com/antivirus
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>> Matt Zilmer, W6NIA
>> --
>> "Always store beer in a dark place."  -R. Heinlein
>>
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---
L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
https://www.avast.com/antivirus