K3 KRX3 - BNC or KAT3?
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I think this was addressed before with not having the KAT3. I do have the KAT3. Is it recommended to hook up the BNC connector on the back to the KRX3 or to use the second SO-239 on the K3 or does it make any difference? Most of the time I will be using the same antenna for both receivers. When the K3 has the capability of having the two receivers on two different bands I would like to monitor another band with a second antenna. An example would be to monitor 6M. Figured I could use the second SO-239 for this. I assume that when I am listening to both receivers on the same band that if I am using the receive antenna input the receive antenna will go to both receivers. Is this correct? Tnx N2TK, Tony K3 #311 K3 #1435 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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I too would like to know this for same reason.
Not sure how best to configure this -- Patience serves as a protection against wrongs as clothes do against cold. For if you put on more clothes as the cold increases, it will have no power to hurt you. So in like manner you must grow in patience when you meet with great wrongs, and they will then be powerless to vex your mind. -Leonardo da Vinci, painter, engineer, musician, and scientist (1452-1519) On 13 Aug 2008, at 17:15, N2TK wrote: > > I think this was addressed before with not having the KAT3. I do > have the > KAT3. Is it recommended to hook up the BNC connector on the back to > the > KRX3 or to use the second SO-239 on the K3 or does it make any > difference? > > Most of the time I will be using the same antenna for both > receivers. When > the K3 has the capability of having the two receivers on two > different bands > I would like to monitor another band with a second antenna. An > example would > be to monitor 6M. Figured I could use the second SO-239 for this. > > I assume that when I am listening to both receivers on the same band > that if > I am using the receive antenna input the receive antenna will go to > both > receivers. Is this correct? _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by N2TK
It's a little complex and depends on the exact combination of KAT3 and KXV3 options. First read page 37 of the new manual and then see pages 40-42 for diagrams of the option configuration you have. Assuming you have a KXV3 in addition to your KAT3, the following from page 42 applies: "K3 with KAT3 and KXV3 Figure 4 shows the antenna possibilities with both the KAT3 and KXV3 installed. The main receiver can use ANT 1, 2, or RX ANT IN. The sub receiver can either share the main receiver’s RF source, or use its AUX RF input. The latter can be either the non-transmit KAT3 antenna or the AUX RF BNC connector, as described earlier. In either case, the sub receiver’s antenna must be isolated from the transmitting antenna." If you do not have the KXV3, the following from page 41 applies: "K3 with KAT3 ATU The KAT3 internal ATU, which replaces the KANT3 antenna input module, provides a second SO239 antenna jack (ANT 2). As shown in Figure 3, relay K3 routes either ANT 1 or ANT 2 to the main RF path. The antenna not routed to the main path (the non-transmit antenna) can optionally be used as the sub receiver’s AUX RF antenna. This requires that the two antennas connected to the KAT3 be well isolated from each other. If not, the sub receiver’s carrier-operated relay may turn on during transmit. If this occurs, you must either move the two antennas farther apart, or not connect the sub receiver to the KAT3. It may be preferable to connect the sub receiver’s auxiliary RF input to the AUX RF connector on the rear panel. A well-isolated receiving antenna can then be used with the sub receiver when required. (See CONFIG:KRX3, for sub receiver antenna setup.) I have the KXV3 but no KAT3 so my case is different still! 73, Bill |
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Hi Bill,
Tnx for the input. I was focused on the KRX3 manual and had not checked out the K3 manual - duh!. One of these days I will learn that most of my questions have already been addressed in the manual. It looks like there are advantages with either setup for the Sub Rx - Aux RF or KAT3 input. For listening on the low bands I like the option of tying RX Ant and Aux RF together. For monitoring a high band like 6M I like the idea of using Ant 2 on the Sub Rx input when the two receivers can be on two separate bands. Looks like there needs to be a relay control to switch the Sub Rx input between parallel with Main Rx, Aux RF and KAT3. I can dream. For now I will not hook up the Aux RF. 73, N2TK, Tony -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Bill W4ZV Sent: Wednesday, August 13, 2008 1:34 PM To: [hidden email] Subject: Re: [Elecraft] K3 KRX3 - BNC or KAT3? N2TK, Tony wrote: > > > I think this was addressed before with not having the KAT3. I do have the > KAT3. Is it recommended to hook up the BNC connector on the back to the > KRX3 or to use the second SO-239 on the K3 or does it make any difference? > > Most of the time I will be using the same antenna for both receivers. When > the K3 has the capability of having the two receivers on two different > bands > I would like to monitor another band with a second antenna. An example > would > be to monitor 6M. Figured I could use the second SO-239 for this. > > I assume that when I am listening to both receivers on the same band that > if > I am using the receive antenna input the receive antenna will go to both > receivers. Is this correct? > It's a little complex and depends on the exact combination of KAT3 and KXV3 options. First read page 37 of the new manual and then see pages 40-42 for diagrams of the option configuration you have. Assuming you have a KXV3 in addition to your KAT3, the following from page 42 applies: "K3 with KAT3 and KXV3 Figure 4 shows the antenna possibilities with both the KAT3 and KXV3 installed. The main receiver can use ANT 1, 2, or RX ANT IN. The sub receiver can either share the main receiver's RF source, or use its AUX RF input. The latter can be either the non-transmit KAT3 antenna or the AUX RF BNC connector, as described earlier. In either case, the sub receiver's antenna must be isolated from the transmitting antenna." If you do not have the KXV3, the following from page 41 applies: "K3 with KAT3 ATU The KAT3 internal ATU, which replaces the KANT3 antenna input module, provides a second SO239 antenna jack (ANT 2). As shown in Figure 3, relay K3 routes either ANT 1 or ANT 2 to the main RF path. The antenna not routed to the main path (the non-transmit antenna) can optionally be used as the sub receiver's AUX RF antenna. This requires that the two antennas connected to the KAT3 be well isolated from each other. If not, the sub receiver's carrier-operated relay may turn on during transmit. If this occurs, you must either move the two antennas farther apart, or not connect the sub receiver to the KAT3. It may be preferable to connect the sub receiver's auxiliary RF input to the AUX RF connector on the rear panel. A well-isolated receiving antenna can then be used with the sub receiver when required. (See CONFIG:KRX3, for sub receiver antenna setup.) I have the KXV3 but no KAT3 so my case is different still! 73, Bill -- View this message in context: http://n2.nabble.com/K3-KRX3---BNC-or-KAT3--tp722317p722457.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by N2TK
Tony, N2TK wrote:
> Is it recommended to hook up the BNC connector on the back to > the KRX3 or to use the second SO-239 on the K3 or does it make any > difference? Hi Tony, If you have a KAT3, you can optionally use the non-transmit KAT3 antenna (which might be ANT1 or ANT2 at any given time) as the sub receiver's secondary antenna source. If not, you'll need to use the BNC jack. The BNC jack is recommended anyway, and an appropriate cable is supplied with the KRX3 module. It's the way we set up factory-built K3s. It's more flexible, because you can connect a receive-only antenna for use with the sub receiver that is well-isolated from your transmit antennas. (Physical and electrical isolation for a receive antenna is good practice in general.) If you don't have a special RX antenna for use with the sub receiver, but you do have two antennas connected (to ANT1 and ANT2), the KAT3 non-transmit antenna might be a better choice. This selection has no impact on *shared* use of the main antenna by the sub receiver. You can do that in any case. > Most of the time I will be using the same antenna for both > receivers. That's the "shared" case. > When the K3 has the capability of having the two > receivers on two different bands I would like to monitor another > band with a second antenna. An example would > be to monitor 6M. Figured I could use the second SO-239 for this. Either the KAT3 non-transmit antenna or the BNC jack would work. If you use the KAT3 non-transmit antenna, be sure to keep the antennas on ANT1 and ANT2 very well isolated so the sub receiver's carrier-operated relay doesn't get triggered when you transmit. > I assume that when I am listening to both receivers on the same band > that if I am using the receive antenna input the receive antenna > will go to both receivers. Is this correct? Yes. 73, Wayne N6KR _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Wayne, pse "How isolated is the receive only input?" Can I run power with a good receive antenna connected to rcve only input bnc socket without damage anywhere? Thanks. Charles Harpole [hidden email] > To: [hidden email] > From: [hidden email] > Date: Wed, 13 Aug 2008 16:19:28 -0700 > Subject: [Elecraft] Re: K3 KRX3 - BNC or KAT3? > > Tony, N2TK wrote: > >> Is it recommended to hook up the BNC connector on the back to >> the KRX3 or to use the second SO-239 on the K3 or does it make any >> difference? > > Hi Tony, > > If you have a KAT3, you can optionally use the non-transmit KAT3 > antenna (which might be ANT1 or ANT2 at any given time) as the sub > receiver's secondary antenna source. If not, you'll need to use the BNC > jack. > > The BNC jack is recommended anyway, and an appropriate cable is > supplied with the KRX3 module. It's the way we set up factory-built > K3s. It's more flexible, because you can connect a receive-only antenna > for use with the sub receiver that is well-isolated from your transmit > antennas. (Physical and electrical isolation for a receive antenna is > good practice in general.) > > If you don't have a special RX antenna for use with the sub receiver, > but you do have two antennas connected (to ANT1 and ANT2), the KAT3 > non-transmit antenna might be a better choice. > > This selection has no impact on *shared* use of the main antenna by the > sub receiver. You can do that in any case. > > >> Most of the time I will be using the same antenna for both >> receivers. > > That's the "shared" case. > > >> When the K3 has the capability of having the two >> receivers on two different bands I would like to monitor another >> band with a second antenna. An example would >> be to monitor 6M. Figured I could use the second SO-239 for this. > > Either the KAT3 non-transmit antenna or the BNC jack would work. If you > use the KAT3 non-transmit antenna, be sure to keep the antennas on ANT1 > and ANT2 very well isolated so the sub receiver's carrier-operated > relay doesn't get triggered when you transmit. > > >> I assume that when I am listening to both receivers on the same band >> that if I am using the receive antenna input the receive antenna >> will go to both receivers. Is this correct? > > Yes. > > 73, > Wayne > N6KR > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Charles Harpole wrote:
> Can I run power with a good receive antenna connected to > rcve only input bnc socket without damage anywhere? Yes. We've pumped several watts into the KRX3's aux antenna input without any sign of damage. (But anything above about 1 to 2 watts measured at the sub's AUX input will activate the carrier-operated relay, or COR, which should be avoided because it slows down break-in keying receive recovery.) As long as the receive antenna is a reasonable distance from the transmit antenna, the COR won't be activated, and you'll be at a safe level. The AUX BNC jack provides somewhat better isolation than the KAT3 connector, so it may be the better choice if you're not sure if the antennas are far enough apart at the intended power level. 73, Wayne N6KR --- http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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A datapoint on whether or not it is likely to generate 1 or 2 watts of
input to the RX antenna. A number of contesters had been using ANC-4 noise limiters as preamps rather than their intended function. The RX antenna was ported through it and to the receiver. 1/4 watt resistors in the ANC4 input were cooked. Replacing them with 1 watt units solved the problem. This foggy data suggests that 1 watt of power to RX antenna input may be unlikely with something like the below setup. I was one of these people. The situation is worse on 160M with several receive antennas much closer than 1/4 wave to the transmit antenna-- worse case 50'. Keep in mind 1/4 wave is about 125'. Running a full KW to an inverted L. There are ICE units which limit inputs to something under 1/2 volt. If you have receive antennas closer than the above, you might consider the ICE unit. There are other HB limiters people have created over the years. If you have an oscilloscope or RF voltmeter, terminate the receive antenna with 50 ohms in the shack and measure the voltage. From that you can compute power and see where you stand. 73 de Brian/K3KO wayne burdick wrote: > Charles Harpole wrote: > >> Can I run power with a good receive antenna connected to >> rcve only input bnc socket without damage anywhere? > > > > Yes. We've pumped several watts into the KRX3's aux antenna input > without any sign of damage. (But anything above about 1 to 2 watts > measured at the sub's AUX input will activate the carrier-operated > relay, or COR, which should be avoided because it slows down break-in > keying receive recovery.) > > As long as the receive antenna is a reasonable distance from the > transmit antenna, the COR won't be activated, and you'll be at a safe > level. The AUX BNC jack provides somewhat better isolation than the > KAT3 connector, so it may be the better choice if you're not sure if > the antennas are far enough apart at the intended power level. > > 73, > Wayne > N6KR > > --- > > http://www.elecraft.com > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by wayne burdick
So if the COR activates, it provides very much more protection, yes or no??? It activates automatically, yes? In ordinary SSB chat, the COR delay u mention will be a real problem or a minor problem? I once burned the contacts off a relay inside my IC-730 with RF from near by antenna. So I worry. Charles Harpole [hidden email] > CC: [hidden email] > From: [hidden email] > Subject: Re: K3 KRX3 - BNC or KAT3? > Date: Wed, 13 Aug 2008 20:48:39 -0700 > To: [hidden email] > > Charles Harpole wrote: > >> Can I run power with a good receive antenna connected to >> rcve only input bnc socket without damage anywhere? > > > Yes. We've pumped several watts into the KRX3's aux antenna input > without any sign of damage. (But anything above about 1 to 2 watts > measured at the sub's AUX input will activate the carrier-operated > relay, or COR, which should be avoided because it slows down break-in > keying receive recovery.) > > As long as the receive antenna is a reasonable distance from the > transmit antenna, the COR won't be activated, and you'll be at a safe > level. The AUX BNC jack provides somewhat better isolation than the > KAT3 connector, so it may be the better choice if you're not sure if > the antennas are far enough apart at the intended power level. > > 73, > Wayne > N6KR > > --- > > http://www.elecraft.com > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Charles Harpole wrote:
> > So if the COR activates, it provides very much more > protection, yes or no??? Yes. The relay has 1-amp contacts, which should handle any reasonable amount of power induced into the sub receiver's antenna. (It's rated the same as the relay we use on the KXV3's RX ANT IN jack.) I wouldn't put a KW into a transmit antenna that's in the near field of the receiving antenna, or is oriented so that it can couple more than a few watts into it. > It activates automatically, yes? Yes. > > In ordinary SSB chat, the COR delay u mention will be a real > problem or a minor problem? There's a possibility that other stations might hear the effect if the COR relay is rapidly cutting in and out, in any operating mode. If you hear it doing this, you should take some action to prevent it (switch the sub RX to the shared RF path, or reduce power, or move the antenna). There may also be a warning flashed on the VFO B display when the COR is being activated. That's on the firmware list. 73, Wayne N6KR _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by wayne burdick
Wayne (and anyone else who has installed the KRX3), there are some
questions buried in here, marked with 2 ** to help spot them. Hmmmm, from original reading of the Owners manual and discussions on here last year, I thought selection of either the KAT3 non-Tx ANT1/2 or the Aux BNC Jack (AUX.RF) would be via software. ** I assume that this has proven to be a problem and so now it's a 'choose at installation time' option (as per KRX3 installation manual)? Even now, reading the Owners Manual, the diagrams on pg 41 and 42 (of rev D1) suggest the AUX.RF is connected to SA4, along with the KAT3 connection. ** Should the horizontal line from SA4 to KAT3 be dotted as well, with a note saying installation option (choose one of two)? I wish to use 2 antennas and may transmit on either and I had planned to be able to listen on both and then transmit on one of them. So for me, using the KAT3 method appears to be best. Issue with COR and delay etc. won't come into it (I think). However, the work to install the AUX.RF connector is 'significant' (well, ok, it’s a bit more, involving removing side panels etc.) so I'd like to do this while I'm installing the KRX3, just so it's done. But then, not connect the TMP lead to the KRX3, but sleeve the connector and 'tuck' it out of the way somewhere. ** Is it possible/acceptable to install the AUX.RF BNC jack, but not connect it to anything? ** Would there be any implications of stray RF on the lead to worry about? And, if at some point in the future, I choose to use AUX.RF, switch the lead to the KAT3 with the AUX.RF lead, again sleeving the KAT3 TMP to avoid any shorts. ** Again, is there any issue with leaving the KAT3 lead connected to the KAT3, but not connected to the KRX3? ** Perhaps it would be advisable to install an additional TMP socket with both pin and shield grounded and to connect the unused TMP lead to it? ** Might that be a future mod for you, providing an unused TMP socket just to terminate the unused lead? -- There is no pillow so soft as a clear conscience. -French proverb On 14 Aug 2008, at 00:19, wayne burdick wrote: > Tony, N2TK wrote: > > > Is it recommended to hook up the BNC connector on the back to > > the KRX3 or to use the second SO-239 on the K3 or does it make any > > difference? > > Hi Tony, > > If you have a KAT3, you can optionally use the non-transmit KAT3 > antenna (which might be ANT1 or ANT2 at any given time) as the sub > receiver's secondary antenna source. If not, you'll need to use the > BNC jack. > > The BNC jack is recommended anyway, and an appropriate cable is > supplied with the KRX3 module. It's the way we set up factory-built > K3s. It's more flexible, because you can connect a receive-only > antenna for use with the sub receiver that is well-isolated from > your transmit antennas. (Physical and electrical isolation for a > receive antenna is good practice in general.) > > If you don't have a special RX antenna for use with the sub > receiver, but you do have two antennas connected (to ANT1 and ANT2), > the KAT3 non-transmit antenna might be a better choice. > > This selection has no impact on *shared* use of the main antenna by > the sub receiver. You can do that in any case. > > > > Most of the time I will be using the same antenna for both > > receivers. > > That's the "shared" case. > > > > When the K3 has the capability of having the two > > receivers on two different bands I would like to monitor another > > band with a second antenna. An example would > > be to monitor 6M. Figured I could use the second SO-239 for this. > > Either the KAT3 non-transmit antenna or the BNC jack would work. If > you use the KAT3 non-transmit antenna, be sure to keep the antennas > on ANT1 and ANT2 very well isolated so the sub receiver's carrier- > operated relay doesn't get triggered when you transmit. > > > > I assume that when I am listening to both receivers on the same band > > that if I am using the receive antenna input the receive antenna > > will go to both receivers. Is this correct? > > Yes. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: Re: K3 KRX3 - BNC or KAT3?
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David:
Re: your first statement/question... The MAIN/AUX selection can be made at any time after the KRX3 is installed and turned on by press/hold of BSET and tapping the ANT button. It is not just a "choose at installation time" option. 73, Ken K3IU ~~~~~~~~~~~~~~~~~~~~~~~ David Ferrington, M0XDF wrote: > Wayne (and anyone else who has installed the KRX3), there are some > questions buried in here, marked with 2 ** to help spot them. > > Hmmmm, from original reading of the Owners manual and discussions on > here last year, I thought selection of either the KAT3 non-Tx ANT1/2 > or the Aux BNC Jack (AUX.RF) would be via software. > > ** I assume that this has proven to be a problem and so now it's a > 'choose at installation time' option (as per KRX3 installation manual)? > > Even now, reading the Owners Manual, the diagrams on pg 41 and 42 (of > rev D1) suggest the AUX.RF is connected to SA4, along with the KAT3 > connection. > > ** Should the horizontal line from SA4 to KAT3 be dotted as well, with > a note saying installation option (choose one of two)? > > > I wish to use 2 antennas and may transmit on either and I had planned > to be able to listen on both and then transmit on one of them. So for > me, using the KAT3 method appears to be best. Issue with COR and delay > etc. won't come into it (I think). > > However, the work to install the AUX.RF connector is 'significant' > (well, ok, it’s a bit more, involving removing side panels etc.) so > I'd like to do this while I'm installing the KRX3, just so it's done. > > But then, not connect the TMP lead to the KRX3, but sleeve the > connector and 'tuck' it out of the way somewhere. > > ** Is it possible/acceptable to install the AUX.RF BNC jack, but not > connect it to anything? > ** Would there be any implications of stray RF on the lead to worry > about? > > And, if at some point in the future, I choose to use AUX.RF, switch > the lead to the KAT3 with the AUX.RF lead, again sleeving the KAT3 TMP > to avoid any shorts. > > ** Again, is there any issue with leaving the KAT3 lead connected to > the KAT3, but not connected to the KRX3? > > ** Perhaps it would be advisable to install an additional TMP socket > with both pin and shield grounded and to connect the unused TMP lead > to it? > > ** Might that be a future mod for you, providing an unused TMP socket > just to terminate the unused lead? > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: Re: K3 KRX3 - BNC or KAT3?
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Ken K3IU wrote:
> David: > > Oopps... what I said is true, but not what you are addressing. Sorry. > > There is only one AUX input physical connection on the KRX3. At > assembly, one must select which, if any, aux input source will be > used... either the non-tx KAT3 ant or the separate BNC connector. That > necessitates the selection of Ant=bnc or Ant=Atu . When I installed > the KRX3, I physically installed both the BNC connector and the KAT3 > cables but did not connect either to the KRX3. Maybe later... > > 73, Ken K3IU > ~~~~~~~~~~~~~~~~~~~~~~~~~~ > Ken K3IU wrote: >> David: >> Re: your first statement/question... The MAIN/AUX selection can be >> made at any time after the KRX3 is installed and turned on by >> press/hold of BSET and tapping the ANT button. It is not just a >> "choose at installation time" option. >> 73, Ken K3IU >> ~~~~~~~~~~~~~~~~~~~~~~~ >> David Ferrington, M0XDF wrote: >>> Wayne (and anyone else who has installed the KRX3), there are some >>> questions buried in here, marked with 2 ** to help spot them. >>> >>> Hmmmm, from original reading of the Owners manual and discussions on >>> here last year, I thought selection of either the KAT3 non-Tx ANT1/2 >>> or the Aux BNC Jack (AUX.RF) would be via software. >>> >>> ** I assume that this has proven to be a problem and so now it's a >>> 'choose at installation time' option (as per KRX3 installation manual)? >>> >>> Even now, reading the Owners Manual, the diagrams on pg 41 and 42 >>> (of rev D1) suggest the AUX.RF is connected to SA4, along with the >>> KAT3 connection. >>> >>> ** Should the horizontal line from SA4 to KAT3 be dotted as well, >>> with a note saying installation option (choose one of two)? >>> >>> >>> I wish to use 2 antennas and may transmit on either and I had >>> planned to be able to listen on both and then transmit on one of >>> them. So for me, using the KAT3 method appears to be best. Issue >>> with COR and delay etc. won't come into it (I think). >>> >>> However, the work to install the AUX.RF connector is 'significant' >>> (well, ok, it’s a bit more, involving removing side panels etc.) so >>> I'd like to do this while I'm installing the KRX3, just so it's done. >>> >>> But then, not connect the TMP lead to the KRX3, but sleeve the >>> connector and 'tuck' it out of the way somewhere. >>> >>> ** Is it possible/acceptable to install the AUX.RF BNC jack, but not >>> connect it to anything? >>> ** Would there be any implications of stray RF on the lead to worry >>> about? >>> >>> And, if at some point in the future, I choose to use AUX.RF, switch >>> the lead to the KAT3 with the AUX.RF lead, again sleeving the KAT3 >>> TMP to avoid any shorts. >>> >>> ** Again, is there any issue with leaving the KAT3 lead connected to >>> the KAT3, but not connected to the KRX3? >>> >>> ** Perhaps it would be advisable to install an additional TMP socket >>> with both pin and shield grounded and to connect the unused TMP lead >>> to it? >>> >>> ** Might that be a future mod for you, providing an unused TMP >>> socket just to terminate the unused lead? >>> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com >> Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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> There is only one AUX input physical connection on the
> KRX3. At assembly, one must select which, if any, aux > input source will be used... either the non-tx KAT3 ant or > the separate BNC connector. That necessitates the > selection of Ant=bnc or Ant=Atu . When I installed the > KRX3, I physically installed both the BNC connector and > the KAT3 cables but did not connect either to the KRX3. > Maybe later... > > 73, Ken K3IU I brought my RX antenna connections out on "RCA" phono jacks. Mainly I did this so the interface was a drop-in for my Yaesu and Icom rigs and the radios could easily be swapped. I have the TX antenna available (when in receive mode) and both main and sub receiver inputs. This is a specialized application however where I have external antenna switches and might want to use multiple radios on one antenna. Or it lends itself to using a noise canceller with the TX antenna as a noise sample source, etc. It's pretty easy to do this and it doesn't require cutting anything up. It can be undone without anyone knowing it was ever there. But again this is a special case where instant and full antenna flexibility is a must. 73 Tom _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Ken Wagner K3IU
Ok, so what did you do with the unattached connections? Did you sleeve
them, did you tuck them out of the way somewhere? -- Write the bad things that are done to you in the sand, but write the good things that happen to you on a piece of marble. -Arabian wisdom On 14 Aug 2008, at 11:36, Ken K3IU wrote: > When I installed the KRX3, I physically installed both the BNC > connector and the KAT3 cables but did not connect either to the > KRX3. Maybe later... _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by W8JI
how did you bring them out? did you run then through some existing hole?
-- God gives every bird his worm, but he does not throw it into the nest. -Swedish proverb On 14 Aug 2008, at 12:37, Tom W8JI wrote: > I brought my RX antenna connections out on "RCA" phono jacks. Mainly > I did this so the interface was a drop-in for my Yaesu and Icom rigs > and the radios could easily be swapped. > > I have the TX antenna available (when in receive mode) and both main > and sub receiver inputs. This is a specialized application however > where I have external antenna switches and might want to use > multiple radios on one antenna. Or it lends itself to using a noise > canceller with the TX antenna as a noise sample source, etc. > > It's pretty easy to do this and it doesn't require cutting anything > up. It can be undone without anyone knowing it was ever there. But > again this is a special case where instant and full antenna > flexibility is a must. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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> how did you bring them out? did you run then through some
> existing hole? I made a plate that bolts into the normal RX antenna and transceiver antenna interface area. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by M0XDF
In a recent message, "David Ferrington, M0XDF" <[hidden email]>
wrote ... >Ok, so what did you do with the unattached connections? Did you sleeve >them, did you tuck them out of the way somewhere? See page 40 of the KRX3 manual. 73 -- David G4DMP Leeds, England, UK ------ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Thanks David - helps if you RTFM. You haven't found any problems with
the TMP lead from the KAT3 then? I wondered if there might be some stray RF pickup. I think I will connect my KAT3 cable and leave the AUX.RF one sleeved and taped out of the way. I may consider some form of switch or jumper arrangement at some distant future date if I find I want to switch back and forth. But most likely I'll settle for something like a Beverage to the AUX.RF in the future - when my ship comes in and I have enough realestate. 73 de M0XDF, K3 #174 -- Knowing my luck, when my ship comes in, I'll be waiting at the airport! On 14 Aug 2008, at 13:52, David Pratt wrote: > In a recent message, "David Ferrington, M0XDF" > <[hidden email]> wrote ... >> Ok, so what did you do with the unattached connections? Did you >> sleeve them, did you tuck them out of the way somewhere? > > See page 40 of the KRX3 manual. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by W8JI
Thats a good idea, thanks.
-- He who asks is a fool for five minutes, but he who does not ask remains a fool forever. -Chinese proverb On 14 Aug 2008, at 13:52, Tom W8JI wrote: >> how did you bring them out? did you run then through some existing >> hole? > > I made a plate that bolts into the normal RX antenna and transceiver > antenna interface area. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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