KRX3 - ATU or BNC

[Jim - W6VAR]

For those that have installed the KRX3, which option did you choose for the receive antenna, BNC or ATU? How do you intend to operate with the second receiver that guided you to this choice?

 

Jim – W6VAR

 

 

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[Vic K2VCO]

James Kohnke (W6VAR) wrote:
> For those that have installed the KRX3, which option did you choose for the
> receive antenna, BNC or ATU? How do you intend to operate with the second
> receiver that guided you to this choice?

I do two things with the KRX3. One is to listen to a dx station in one ear and the
pileup in the other, in order to more easily find the guy the dx is working so I can
call on that frequency. For this purpose, I want the KRX3 to share the main antenna.

The other is to use diversity reception. I have laid about 200 feet of wire on the
ground to make a low-noise rx antenna, and I also have a vertical which I can use as
a receiving antenna. When operating diversity I want the KRX3 to use one of these
antennas.

I chose BNC. I connect the diversity antennas to the BNC jack (I have a switch to
select one of them). The latest firmware allows you to choose either MAIN or AUX for
the KRX3 antenna in normal and diversity mode, so this gives me what I want
automatically.

All the above could have been done with the ATU setting (and connecting the KRX3's
auxiliary input to the KAT3). Then I would have connected my receiving antennas to
the Antenna 2 connector on the KAT3. But by using the BNC connector, I free up
Antenna 2 for a second transmitting antenna!
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[N5GE]

On Fri, 26 Dec 2008 08:33:25 -0800, you wrote:

>James Kohnke (W6VAR) wrote:
>> For those that have installed the KRX3, which option did you choose for the
>> receive antenna, BNC or ATU? How do you intend to operate with the second
>> receiver that guided you to this choice?
>
>I do two things with the KRX3. One is to listen to a dx station in one ear and the
>pileup in the other, in order to more easily find the guy the dx is working so I can
>call on that frequency. For this purpose, I want the KRX3 to share the main antenna.
>
>The other is to use diversity reception. I have laid about 200 feet of wire on the
>ground to make a low-noise rx antenna, and I also have a vertical which I can use as
>a receiving antenna. When operating diversity I want the KRX3 to use one of these
>antennas.
>
>I chose BNC. I connect the diversity antennas to the BNC jack (I have a switch to
>select one of them). The latest firmware allows you to choose either MAIN or AUX for
>the KRX3 antenna in normal and diversity mode, so this gives me what I want
>automatically.
>
>All the above could have been done with the ATU setting (and connecting the KRX3's
>auxiliary input to the KAT3). Then I would have connected my receiving antennas to
>the Antenna 2 connector on the KAT3. But by using the BNC connector, I free up
>Antenna 2 for a second transmitting antenna!

I use the same setup described by W6VAR, using an 80m full wave loop for the QSX
antenna.  I use antenna 2 for 6m exclusively.

Tom Hinson Childers, N5GE

K3 #806, XV144, XV432
Mini-Modules

http://www.eQSL.cc/Member.cfm?N5GE 
http://www.n5ge.com
http://www.swotrc.net

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[Benny Aumala]

When installing KRX3, why not make it properly.
Installing BNC may save trouble later, and do you have
the necessary hardware then at hand?

Also, people seem to be afraid of taking off the right panel.
They make it the easy way. Problem is just loosening 2 transistors.

Now, when side panel is off, you may also change ANT1 and ANT2-
connectors  to BNC and make a ground strap between those connectors
and ATU.

With BNC for KRX3 your choises are not limited. You can even use
a power plitter for specialized needs.

Benny          OH9NB


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