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KRX3 AUX Ant

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Brett Howard

KRX3 AUX Ant

I think for most normal operations I want to use the KAT3 port for the
Aux antenna jack for my KRX3 but I'd like to have the option of using
the AUX RF port without too much hassle. Does anyone see any reason why
one would have any problems mounting the BNC jack and routing it and the
other TMP cable (connected to the KAT3) together then just tape off the
one that I'm not using and let it float in there. I could even throw a
connector with a short on the AUX RF connector when its not in use to
make sure and completely ground out the floating cable (not sure that
would really be needed but couldn't hurt right?)

~BTH

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M0XDF

Re: KRX3 AUX Ant

lots of people have done that.
73 de M0XDF, K3 #174
--
Power is no substitute for Skill.

On 15 Jun 2009, at 01:06, Brett Howard wrote:

> I think for most normal operations I want to use the KAT3 port for the
> Aux antenna jack for my KRX3 but I'd like to have the option of using
> the AUX RF port without too much hassle. Does anyone see any reason
> why
> one would have any problems mounting the BNC jack and routing it and
> the
> other TMP cable (connected to the KAT3) together then just tape off
> the
> one that I'm not using and let it float in there. I could even
> throw a
> connector with a short on the AUX RF connector when its not in use to
> make sure and completely ground out the floating cable (not sure that
> would really be needed but couldn't hurt right?)

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Bill W4ZV

Re: KRX3 AUX Ant

In reply to this post by Brett Howard

Brett Howard wrote

I think for most normal operations I want to use the KAT3 port for the
Aux antenna jack for my KRX3 but I'd like to have the option of using
the AUX RF port without too much hassle. Does anyone see any reason why
one would have any problems mounting the BNC jack and routing it and the
other TMP cable (connected to the KAT3) together then just tape off the
one that I'm not using and let it float in there. I could even throw a
connector with a short on the AUX RF connector when its not in use to
make sure and completely ground out the floating cable (not sure that
would really be needed but couldn't hurt right?)

This is actually a good idea for anyone considering later adding the KRX3 when first building your initial K3. It's much easier to install and route the AUX RF connector and cable initially, even if you don't install the KRX3. I believe the only caution is to secure the TMP connector so that the shield cannot touch any active components. I taped my TMP cable to the outer sheet metal enclosure for the KPA3.

I don't recall the part number for the AUX RF TMP cable assembly normally supplied with the KRX3 but Elecraft will know what you mean if you place an order for one with your initial K3 order.

73, Bill

WILLIS COOKE

Re: KRX3 AUX Ant

In reply to this post by Brett Howard

But, you don't get the BNC connector and cable until you get the KRX3. I don't remember having any trouble routing the cable when I installed the KRX3 months after building the K3.

Willis 'Cookie' Cooke
K5EWJ

--- On Mon, 6/15/09, Bill W4ZV <[hidden email]> wrote:

> From: Bill W4ZV <[hidden email]>
> Subject: Re: [Elecraft] KRX3 AUX Ant
> To: [hidden email]
> Date: Monday, June 15, 2009, 8:52 AM
>
>
>
> Brett Howard wrote:
> >
> > I think for most normal operations I want to use the
> KAT3 port for the
> > Aux antenna jack for my KRX3 but I'd like to have the
> option of using
> > the AUX RF port without too much hassle. Does
> anyone see any reason why
> > one would have any problems mounting the BNC jack and
> routing it and the
> > other TMP cable (connected to the KAT3) together then
> just tape off the
> > one that I'm not using and let it float in
> there. I could even throw a
> > connector with a short on the AUX RF connector when
> its not in use to
> > make sure and completely ground out the floating cable
> (not sure that
> > would really be needed but couldn't hurt right?)
> >
>
> This is actually a good idea for anyone considering later
> adding the KRX3
> when first building your initial K3. It's much easier
> to install and route
> the AUX RF connector and cable initially, even if you don't
> install the
> KRX3. I believe the only caution is to secure the TMP
> connector so that the
> shield cannot touch any active components. I taped my
> TMP cable to the
> outer sheet metal enclosure for the KPA3.
>
> I don't recall the part number for the AUX RF TMP cable
> assembly normally
> supplied with the KRX3 but Elecraft will know what you mean
> if you place an
> order for one with your initial K3 order.
>
> 73, Bill
>
> --
> View this message in context: http://n2.nabble.com/KRX3-AUX-Ant-tp3077662p3081041.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
> ______________________________________________________________
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>

Bill W4ZV

Re: KRX3 AUX Ant

On Mon, Jun 15, 2009 at 12:10 PM, WILLIS COOKE <[hidden email]> wrote:

>
> But, you don't get the BNC connector and cable until you get the KRX3.

Which is why I said:

> I don't recall the part number for the AUX RF TMP cable
> > assembly normally
> > supplied with the KRX3 but Elecraft will know what you mean
> > if you place an
> > order for one with your initial K3 order.

Of course it can be installed after initial assembly...it's just easier in
the initial build.

73, Bill W4ZV
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Brett Howard

Re: KRX3 AUX Ant

In reply to this post by M0XDF

Appreciated... I've been off the reflector for a bit and just haven't
been paying very close attention... Glad to hear there are no unforseen
issues with that...

On Mon, 2009-06-15 at 04:31 +0100, David Ferrington, M0XDF wrote:

> lots of people have done that.
> 73 de M0XDF, K3 #174
> --
> Power is no substitute for Skill.
>
> On 15 Jun 2009, at 01:06, Brett Howard wrote:
>
> > I think for most normal operations I want to use the KAT3 port for the
> > Aux antenna jack for my KRX3 but I'd like to have the option of using
> > the AUX RF port without too much hassle. Does anyone see any reason
> > why
> > one would have any problems mounting the BNC jack and routing it and
> > the
> > other TMP cable (connected to the KAT3) together then just tape off
> > the
> > one that I'm not using and let it float in there. I could even
> > throw a
> > connector with a short on the AUX RF connector when its not in use to
> > make sure and completely ground out the floating cable (not sure that
> > would really be needed but couldn't hurt right?)
>

Brett Howard

Re: KRX3 AUX Ant

In reply to this post by Bill W4ZV

Well I just placed the order for the SubRX today so I should be getting
that cable in the box. Here's hoping that all goes well with the
install as I won't have much time to get replacement parts from Elecraft
before FD if there are any issues.

On Mon, 2009-06-15 at 08:52 -0700, Bill W4ZV wrote:

>
>
> Brett Howard wrote:
> >
> > I think for most normal operations I want to use the KAT3 port for the
> > Aux antenna jack for my KRX3 but I'd like to have the option of using
> > the AUX RF port without too much hassle. Does anyone see any reason why
> > one would have any problems mounting the BNC jack and routing it and the
> > other TMP cable (connected to the KAT3) together then just tape off the
> > one that I'm not using and let it float in there. I could even throw a
> > connector with a short on the AUX RF connector when its not in use to
> > make sure and completely ground out the floating cable (not sure that
> > would really be needed but couldn't hurt right?)
> >
>
> This is actually a good idea for anyone considering later adding the KRX3
> when first building your initial K3. It's much easier to install and route
> the AUX RF connector and cable initially, even if you don't install the
> KRX3. I believe the only caution is to secure the TMP connector so that the
> shield cannot touch any active components. I taped my TMP cable to the
> outer sheet metal enclosure for the KPA3.
>
> I don't recall the part number for the AUX RF TMP cable assembly normally
> supplied with the KRX3 but Elecraft will know what you mean if you place an
> order for one with your initial K3 order.
>
> 73, Bill
>

Ken Kopp-3

KRX3 ANT input flexibility

I purchased the KRX3 to monitor 6M while the radio is in use
on other bands I connect a 6M omni antenna to the KRX3
and use the KAT3's #2 antenna to feed a 6M array when
the K3 is switched to 6M. The resulting diversity receive
-is- impressive!

The as-designed choices to select what antenna is routed
to the KRX3 is limited (IMHO) and here's my method of
achieving more flexibility in using the KRX3:

The BNC(F) to TMP(M) cable is installed in the normal manner
and is routed to the area atop the rear of the KRX3. The cable
from the KAT3 tuner is also routed to the same area.

I've made a short TMP(M) to TMP(F) extension cable to run
from the KRX3's TMP(F) input connector to the same area atop
the KRX3. This allows me maximum flexibility in what source
is fed to the KRX3's antenna input by just removing the K3's
top cover and swapping connections to suit my need.

The board-mounted TMP(F) jacks are somewhat fragile and if
one attempts to "sneak" the extension cable into the KRX3's
jack from above and the shell will likely be expanded, resulting
in a loose fit. To keep stress on the jack to a minimum, I secure
the extension cable to the knurled nut on the top of the KRX3.

It's -much- easier to make the connection to the KRX3 input
jack if the KIO3 panel is removed to allow easy access to the
rear of the KRX3.

73! Ken Kopp - K0PP
[hidden email]
http://tinyurl.com/7lm3m5
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Greg - AB7R

Re: KRX3 ANT input flexibility

Hi Ken!

How about this option. TMP cable from KRX3 to a BNC on the back of the radio (Use the
hole for the external ref). Connect this to the common position of an external two-
position switch. Then run a TMP cable from the KAT3 where the subRX connects to the
BNC for the AUX RF. Connect this to one of the two positions on the switch. Now
connect your 6M Omni receive antenna to the second input.

Now you can switch between the unused KAT3 input and the Omni antenna you would
nomally keep connected to the AUX RF input without having to remove the cover.

Better yet...you can get an automatic switch and use one of the DIGOUT lines to do the
switching when 6M is selected.

I will probably do something similar. I also use an array solutions sixpack switch.
ANT1 feeds one side and ANT2 feeds the other. This way I can select any of my
antennas for either antenna input. I keep the Main antenna set to auto switch with
the KRC2 and the ANT2 position I manually switch to I can try different combinations.

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065

On Fri Jun 19 8:04 , 'Ken Kopp' <[hidden email]> sent:

>I purchased the KRX3 to monitor 6M while the radio is in use
>on other bands I connect a 6M omni antenna to the KRX3
>and use the KAT3's #2 antenna to feed a 6M array when
>the K3 is switched to 6M. The resulting diversity receive
>-is- impressive!
>
>The as-designed choices to select what antenna is routed
>to the KRX3 is limited (IMHO) and here's my method of
>achieving more flexibility in using the KRX3:
>
>The BNC(F) to TMP(M) cable is installed in the normal manner
>and is routed to the area atop the rear of the KRX3. The cable
>from the KAT3 tuner is also routed to the same area.
>
>I've made a short TMP(M) to TMP(F) extension cable to run
>from the KRX3's TMP(F) input connector to the same area atop
>the KRX3. This allows me maximum flexibility in what source
>is fed to the KRX3's antenna input by just removing the K3's
>top cover and swapping connections to suit my need.
>
>The board-mounted TMP(F) jacks are somewhat fragile and if
>one attempts to "sneak" the extension cable into the KRX3's
>jack from above and the shell will likely be expanded, resulting
>in a loose fit. To keep stress on the jack to a minimum, I secure
>the extension cable to the knurled nut on the top of the KRX3.
>
>It's -much- easier to make the connection to the KRX3 input
>jack if the KIO3 panel is removed to allow easy access to the
>rear of the KRX3.
>
>73! Ken Kopp - K0PP
> [hidden email]
> http://tinyurl.com/7lm3m5
>______________________________________________________________
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>
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