Problems with KRX3A
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Gareth,
The information you have been given is correct but it's a challenge to wrap ones head around the details, a couple are subtle. It is ultimately the items you have installed (the tuner, with the second antenna port) AND the connection of cables to the KRX3 (which connector source is chosen), THEN the setting in menu (KRX3 = ANT | BNC) to match those choices. [The KRX3 will listen to ANT 1 | 2 with a tuner OR will listen to MAIN (whatever the main RX is using) | BNC; with or without a tuner (I think that's all inclusive).] Then, the use of the front panel to engage which feed is in play, based on the options above (ANT 1 or 2; with a tuner| Main or BNC). In my case, with a tuner (unused, one port to a KPA1500, the other to a dummy load) I chose to use the BNC as the RX source for the KRX3, simply so I cannot transmit into it, ever, and have diversity reception. I can listen via main or BNC (RX system) and worry less about doing something stupid like blowing up the RX system and/or finals. It also means that if I want the main receiver to hear the RX antenna (but transmit on the transmit antenna) I have to move a cable on the K3 in the back (or provide a antenna switch), both are BNC, one is more challenging to reach through the maze of wires. I'm hoping from the comments, that the K4 will be simpler to configure (on the fly) as most of us need simpler as we age ;-) The most difficult part is deciding how one will use the tools most effectively, then put the parts in the right place to meet that/those goal/s. None of which answers your original question. I don't mean to be pedantic or insulting; I try to be complete because it's always the simplest of things that are the most elusive; details matter. Assuming that the menu is set to enable a KRX3 and both SYN are showing expected results based on which SYN is installed (you've done this): Hearing the rx audio 'rush' noise is a good start (use headphones, don't mix audio from the main RX); the audio stage is working, now look backwards. Check the KRX3 filter selection to make sure that (a) the filter (menu) choice is correct (right filter) and (b) visually confirm the presence of the filter (DOH!) and (c) is actually IN the slot chosen (menu setting again). Nothing is automatic, you tell the firmware what and where filters are installed. (A quick test is to change the filter bandwidth on the front panel [B SEL or speaker/headphone audio]; note any audio changes from wide to narrow, if any.) Then (if no success) I would start with actually seeing how the TMP cables are connected (you need to know anyway then change if needed to meet your goals); ARE they in the correct place; testing them along the way for continuity and shorting; then make sure that each is seated _fully_ (easy to miss) and correctly (hemostats or very small point pliers on the cable metal connector, very gently but firmly; tactile senses cranked up, damage is easy). Do NOT ever pull on the cable itself. Recheck the menu for the correct source settings again (in particular if you made changes). If still no joy, based on your time difference to CA, an email of your test/findings to the repair team at Elecraft would be the best choice. Please post your results, good and bad so others can learn too. 73, Rick NK7I On 5/28/2020 8:54 AM, Gareth M5KVK wrote: > Thanks, Clark > I think I’m going to open her up again and test all the connecting cables. > > Never mind, at least I get to use my K2 for a change 😊 > > Gareth, M5KVK > > From: Clark Macaulay <[hidden email]> > Date: Thursday, 28 May 2020 at 16:47 > To: Gareth M5KVK <[hidden email]> > Cc: Mark Musick <[hidden email]>, "[hidden email]" <[hidden email]> > Subject: Re: [Elecraft] Problems with KRX3A > > Hi, Gareth. > > Well...you certainly have a mystery here. I found the documentation in the Elecraft manual on this subject a little hard to follow; the book by Fred Cady on the K3 is better and, if you'd don't have have it, I highly recommend it. > > I think you said on a previous post that you can hear the noise of the SUB when enabling it, then you are correct that there is something blocking the signal from the antenna. Assuming the configuration is correct, it might be the cable inside the K3 that feeds the signal to the SUB. When I opened up my K3 a while back to add a filter to the SUB. I noticed that one of the little coax cables entered the SUB at a pinched right angle (at least it was in mine). While I didn't have a problem, it seemed like it could be a problem if I didn't make sure the little connector was firmly inserted. > > I'm afraid I'm now beyond my pay grade on this... > > On Thu, May 28, 2020 at 11:36 AM Gareth M5KVK <[hidden email]<mailto:[hidden email]>> wrote: > Thanks Mark > Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference. > > Gareth > > On 28/05/2020, 16:08, "Mark Musick" <[hidden email]<mailto:[hidden email]>> wrote: > > HI Gareth, > Sorry, I sent my previous e-mail to you before seeing this one. > You have jogged my memory. > I still believe KRX3 ANT= ATU is correct, but what jogged my memory Gareth is I believe, and I'll have to check, is that if you have the ATU installed with the two antenna ports you can use the non-transmit port for a receive antenna. In other words if you have the ATU and have ANT1 selected as the transmit antenna you can select ANT2 for receive. It may be that setting is set to ANT2 when it should be ANT1. However, I believe the K3 is smart enough to know that ANT1 is the only one available when there is no ATU installed. > > 73, > Mark, WB9CIF > > -----Original Message----- > From: [hidden email]<mailto:[hidden email]> <[hidden email]<mailto:[hidden email]>> On Behalf Of Gareth M5KVK > Sent: Thursday, May 28, 2020 14:53 > To: Nr4c <[hidden email]<mailto:[hidden email]>> > Cc: [hidden email]<mailto:[hidden email]> > Subject: Re: [Elecraft] Problems with KRX3A > > Hi Bill > The documentation around this is a bit confusing, but my understanding is that this setting defines where the SUB gets its AUX antenna feed from. It can either be BNC (the Aux RF socket on the back panel), or (if you have the ATU installed and therefore two ANT sockets) it can get it from whichever ANT socket is not being used by MAIN. As I do not have ATU installed, the only option that works is bnc. > > I can choose either MAIN or AUX ant for the SUB by pressing RX ANT > > Does this make sense? > > Gareth, M5KVK > > On 28/05/2020, 14:03, "Nr4c" <[hidden email]<mailto:[hidden email]>> wrote: > > Sorry! > > KRX3 Ant=bnc does not agree with both on MAIN. > > Sent from my iPhone > ...nr4c. bill > > > > On May 28, 2020, at 8:54 AM, Gareth M5KVK <[hidden email]<mailto:[hidden email]>> wrote: > > > > I spent last evening checking the installation of the KRX3A. I did find one bit of incorrect plumbing (in the cables that connect the KRX3A to the rest of the K3S): however correcting it made no discernible difference. > > > > The post-installation setup instructions pass OK and all the CONFIG menu options seem to be correct: though it is difficult to be sure. > > > > With SUB on, SUB AF/RF at Max and Main AF at min: I get noise out of the speaker, but no signal: even though A and B are equal and the Main is definitely receiving a signal. > > CONFIG > > KRX3 Ant=bnc > > L-MIX-R A B > > SPKRS 1 > > SUB AF nor > > > > Looks like an email to support is next. > > > > Gareth, M5KVK > > > > From: Gareth M5KVK <[hidden email]<mailto:[hidden email]>> > > Date: Tuesday, 26 May 2020 at 16:05 > > To: "[hidden email]<mailto:[hidden email]>" <[hidden email]<mailto:[hidden email]>> > > Subject: Problems with KRX3A > > > > Hi there > > I bought a s/h K3S a couple of years ago (SN 10901). It has a KRX3A installed, but I’ve never tried to use it until now. When I enabled the sub receiver this morning, I found I was getting no signal. > > > > I’ve checked various CONFIG settings and it’s set to use the MAIN ANT and it’s AF is independent of the K3S. In an attempt to make progress, I reviewed the installation instructions. > > > > Item 4, after enabling TECH MD, is Tap DISP and rotate VFO B to display SYN1 and SYN2. I do not see these items. Any idea how to debug this? > > > > 73 > > > > Gareth, M5KVK > > ______________________________________________________________ > > Elecraft mailing list > > Home: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=Uo54AiGfy1m5ISLWyMpnApNSzZBOYfX25kdNs0mztTI%3D&reserved=0 > > Help: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=F74Vsiv1DxRfd9JHksPBhSXL17%2F4s0egq3SUy%2BetNlY%3D&reserved=0 > > Post: mailto:[hidden email]<mailto:[hidden email]> > > > > This list hosted by: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=fg97KwBCsPu7v4bPQHXb1OXSF5s%2FGXcz0TSMgsXsNFo%3D&reserved=0 > > Please help support this email list: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=N0AqFb%2BOeCBuITpoOqjqbyGE%2FXPPwQbpar2sDgeXTEo%3D&reserved=0 > > Message delivered to [hidden email]<mailto:[hidden email]> ______________________________________________________________ > Elecraft mailing list > Home: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=Uo54AiGfy1m5ISLWyMpnApNSzZBOYfX25kdNs0mztTI%3D&reserved=0 > Help: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056317483&sdata=KKSQsBY9oSKfy%2F6Ty5MHzyciBHU8lEGN2GHfFt11mcA%3D&reserved=0 > Post: mailto:[hidden email]<mailto:[hidden email]> > > This list hosted by: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056317483&sdata=io1Awr3goeS7tsbYuTH1MGolJzUfA33A%2Ftj7p4mALeg%3D&reserved=0 > Please help support this email list: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056317483&sdata=yQw4SHIq%2BQFrgLtMbWwQY5b8f64B16Lu3muQoMiSxkc%3D&reserved=0 > Message delivered to [hidden email]<mailto:[hidden email]> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email]<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]<mailto:[hidden email]> > > > -- > 73, > > Clark, WU4B > Little Pistol With Wires > QRPARCI #10815 > SKCC #3892 > NAQCC #5055 > CWOPS #1869 > Collins Collectors #AC90-12432 > Southeastern DX Club<http://www.sedxc.org> > North Georgia QRP Club<http://www.nogaqrp.org> > > > "It is vain to do with more what can be done with less." > Attributed to William of Occam (1288 AD - 1348 AD) > > ______________________________________________________________ > 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] 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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In reply to this post by w4sc-2
Thanks, Ben
I'm going to open her up again and do another check on the seating of the KRX3: it's quite difficult to be sure both the multi-way connectors are properly mated. I'm also going to check continuity on all the leads. Gareth, M5KVK On 28/05/2020, 17:38, "[hidden email] on behalf of w4sc" <[hidden email] on behalf of [hidden email]> wrote: Ref pp 43 of KRX3 Istallation and User Guide Rev F Dec 22 2010 ALWAYS Set ANT = BNC if not connected to KAT3. Clarification: I believe config selection ANT=ATU may be inserting attenuation during transmit in the KRX3 signal path to provide protection. Make sure KSYN3 tmp connections good. I had the KRX3 “dead” issue on friends K3. Ben W4SC Sent from Mail for Windows 10 ______________________________________________________________ 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] ______________________________________________________________ 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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In reply to this post by Rick Bates, NK7I
Thanks for the comprehensive reply, Rick.
I'm about to make a start on pretty much the same diagnostic approach. I'll let you all know how I get on. Gareth, M5KVK On 28/05/2020, 18:00, "[hidden email] on behalf of Rick Bates, NK7I" <[hidden email] on behalf of [hidden email]> wrote: Gareth, The information you have been given is correct but it's a challenge to wrap ones head around the details, a couple are subtle. It is ultimately the items you have installed (the tuner, with the second antenna port) AND the connection of cables to the KRX3 (which connector source is chosen), THEN the setting in menu (KRX3 = ANT | BNC) to match those choices. [The KRX3 will listen to ANT 1 | 2 with a tuner OR will listen to MAIN (whatever the main RX is using) | BNC; with or without a tuner (I think that's all inclusive).] Then, the use of the front panel to engage which feed is in play, based on the options above (ANT 1 or 2; with a tuner| Main or BNC). In my case, with a tuner (unused, one port to a KPA1500, the other to a dummy load) I chose to use the BNC as the RX source for the KRX3, simply so I cannot transmit into it, ever, and have diversity reception. I can listen via main or BNC (RX system) and worry less about doing something stupid like blowing up the RX system and/or finals. It also means that if I want the main receiver to hear the RX antenna (but transmit on the transmit antenna) I have to move a cable on the K3 in the back (or provide a antenna switch), both are BNC, one is more challenging to reach through the maze of wires. I'm hoping from the comments, that the K4 will be simpler to configure (on the fly) as most of us need simpler as we age ;-) The most difficult part is deciding how one will use the tools most effectively, then put the parts in the right place to meet that/those goal/s. None of which answers your original question. I don't mean to be pedantic or insulting; I try to be complete because it's always the simplest of things that are the most elusive; details matter. Assuming that the menu is set to enable a KRX3 and both SYN are showing expected results based on which SYN is installed (you've done this): Hearing the rx audio 'rush' noise is a good start (use headphones, don't mix audio from the main RX); the audio stage is working, now look backwards. Check the KRX3 filter selection to make sure that (a) the filter (menu) choice is correct (right filter) and (b) visually confirm the presence of the filter (DOH!) and (c) is actually IN the slot chosen (menu setting again). Nothing is automatic, you tell the firmware what and where filters are installed. (A quick test is to change the filter bandwidth on the front panel [B SEL or speaker/headphone audio]; note any audio changes from wide to narrow, if any.) Then (if no success) I would start with actually seeing how the TMP cables are connected (you need to know anyway then change if needed to meet your goals); ARE they in the correct place; testing them along the way for continuity and shorting; then make sure that each is seated _fully_ (easy to miss) and correctly (hemostats or very small point pliers on the cable metal connector, very gently but firmly; tactile senses cranked up, damage is easy). Do NOT ever pull on the cable itself. Recheck the menu for the correct source settings again (in particular if you made changes). If still no joy, based on your time difference to CA, an email of your test/findings to the repair team at Elecraft would be the best choice. Please post your results, good and bad so others can learn too. 73, Rick NK7I On 5/28/2020 8:54 AM, Gareth M5KVK wrote: > Thanks, Clark > I think I’m going to open her up again and test all the connecting cables. > > Never mind, at least I get to use my K2 for a change 😊 > > Gareth, M5KVK > > From: Clark Macaulay <[hidden email]> > Date: Thursday, 28 May 2020 at 16:47 > To: Gareth M5KVK <[hidden email]> > Cc: Mark Musick <[hidden email]>, "[hidden email]" <[hidden email]> > Subject: Re: [Elecraft] Problems with KRX3A > > Hi, Gareth. > > Well...you certainly have a mystery here. I found the documentation in the Elecraft manual on this subject a little hard to follow; the book by Fred Cady on the K3 is better and, if you'd don't have have it, I highly recommend it. > > I think you said on a previous post that you can hear the noise of the SUB when enabling it, then you are correct that there is something blocking the signal from the antenna. Assuming the configuration is correct, it might be the cable inside the K3 that feeds the signal to the SUB. When I opened up my K3 a while back to add a filter to the SUB. I noticed that one of the little coax cables entered the SUB at a pinched right angle (at least it was in mine). While I didn't have a problem, it seemed like it could be a problem if I didn't make sure the little connector was firmly inserted. > > I'm afraid I'm now beyond my pay grade on this... > > On Thu, May 28, 2020 at 11:36 AM Gareth M5KVK <[hidden email]<mailto:[hidden email]>> wrote: > Thanks Mark > Sadly, Changing the CONFIG KRX3 to be ANT=ATU makes no difference. > > Gareth > > On 28/05/2020, 16:08, "Mark Musick" <[hidden email]<mailto:[hidden email]>> wrote: > > HI Gareth, > Sorry, I sent my previous e-mail to you before seeing this one. > You have jogged my memory. > I still believe KRX3 ANT= ATU is correct, but what jogged my memory Gareth is I believe, and I'll have to check, is that if you have the ATU installed with the two antenna ports you can use the non-transmit port for a receive antenna. In other words if you have the ATU and have ANT1 selected as the transmit antenna you can select ANT2 for receive. It may be that setting is set to ANT2 when it should be ANT1. However, I believe the K3 is smart enough to know that ANT1 is the only one available when there is no ATU installed. > > 73, > Mark, WB9CIF > > -----Original Message----- > From: [hidden email]<mailto:[hidden email]> <[hidden email]<mailto:[hidden email]>> On Behalf Of Gareth M5KVK > Sent: Thursday, May 28, 2020 14:53 > To: Nr4c <[hidden email]<mailto:[hidden email]>> > Cc: [hidden email]<mailto:[hidden email]> > Subject: Re: [Elecraft] Problems with KRX3A > > Hi Bill > The documentation around this is a bit confusing, but my understanding is that this setting defines where the SUB gets its AUX antenna feed from. It can either be BNC (the Aux RF socket on the back panel), or (if you have the ATU installed and therefore two ANT sockets) it can get it from whichever ANT socket is not being used by MAIN. As I do not have ATU installed, the only option that works is bnc. > > I can choose either MAIN or AUX ant for the SUB by pressing RX ANT > > Does this make sense? > > Gareth, M5KVK > > On 28/05/2020, 14:03, "Nr4c" <[hidden email]<mailto:[hidden email]>> wrote: > > Sorry! > > KRX3 Ant=bnc does not agree with both on MAIN. > > Sent from my iPhone > ...nr4c. bill > > > > On May 28, 2020, at 8:54 AM, Gareth M5KVK <[hidden email]<mailto:[hidden email]>> wrote: > > > > I spent last evening checking the installation of the KRX3A. I did find one bit of incorrect plumbing (in the cables that connect the KRX3A to the rest of the K3S): however correcting it made no discernible difference. > > > > The post-installation setup instructions pass OK and all the CONFIG menu options seem to be correct: though it is difficult to be sure. > > > > With SUB on, SUB AF/RF at Max and Main AF at min: I get noise out of the speaker, but no signal: even though A and B are equal and the Main is definitely receiving a signal. > > CONFIG > > KRX3 Ant=bnc > > L-MIX-R A B > > SPKRS 1 > > SUB AF nor > > > > Looks like an email to support is next. > > > > Gareth, M5KVK > > > > From: Gareth M5KVK <[hidden email]<mailto:[hidden email]>> > > Date: Tuesday, 26 May 2020 at 16:05 > > To: "[hidden email]<mailto:[hidden email]>" <[hidden email]<mailto:[hidden email]>> > > Subject: Problems with KRX3A > > > > Hi there > > I bought a s/h K3S a couple of years ago (SN 10901). It has a KRX3A installed, but I’ve never tried to use it until now. When I enabled the sub receiver this morning, I found I was getting no signal. > > > > I’ve checked various CONFIG settings and it’s set to use the MAIN ANT and it’s AF is independent of the K3S. In an attempt to make progress, I reviewed the installation instructions. > > > > Item 4, after enabling TECH MD, is Tap DISP and rotate VFO B to display SYN1 and SYN2. I do not see these items. Any idea how to debug this? > > > > 73 > > > > Gareth, M5KVK > > ______________________________________________________________ > > Elecraft mailing list > > Home: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=Uo54AiGfy1m5ISLWyMpnApNSzZBOYfX25kdNs0mztTI%3D&reserved=0 > > Help: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=F74Vsiv1DxRfd9JHksPBhSXL17%2F4s0egq3SUy%2BetNlY%3D&reserved=0 > > Post: mailto:[hidden email]<mailto:[hidden email]> > > > > This list hosted by: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=fg97KwBCsPu7v4bPQHXb1OXSF5s%2FGXcz0TSMgsXsNFo%3D&reserved=0 > > Please help support this email list: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=N0AqFb%2BOeCBuITpoOqjqbyGE%2FXPPwQbpar2sDgeXTEo%3D&reserved=0 > > Message delivered to [hidden email]<mailto:[hidden email]> ______________________________________________________________ > Elecraft mailing list > Home: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056307492&sdata=Uo54AiGfy1m5ISLWyMpnApNSzZBOYfX25kdNs0mztTI%3D&reserved=0 > Help: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056317483&sdata=KKSQsBY9oSKfy%2F6Ty5MHzyciBHU8lEGN2GHfFt11mcA%3D&reserved=0 > Post: mailto:[hidden email]<mailto:[hidden email]> > > This list hosted by: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056317483&sdata=io1Awr3goeS7tsbYuTH1MGolJzUfA33A%2Ftj7p4mALeg%3D&reserved=0 > Please help support this email list: https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7Cd6e946f34a374010f11e08d803171b5e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637262745056317483&sdata=yQw4SHIq%2BQFrgLtMbWwQY5b8f64B16Lu3muQoMiSxkc%3D&reserved=0 > Message delivered to [hidden email]<mailto:[hidden email]> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email]<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]<mailto:[hidden email]> > > > -- > 73, > > Clark, WU4B > Little Pistol With Wires > QRPARCI #10815 > SKCC #3892 > NAQCC #5055 > CWOPS #1869 > Collins Collectors #AC90-12432 > Southeastern DX Club<http://www.sedxc.org> > North Georgia QRP Club<http://www.nogaqrp.org> > > > "It is vain to do with more what can be done with less." > Attributed to William of Occam (1288 AD - 1348 AD) > > ______________________________________________________________ > 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] ______________________________________________________________ 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] ______________________________________________________________ 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] |
Re: Problems with KRX3A
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In reply to this post by m5kvk
Make sure the TMP connector center section on the boards is not broken or
push out. Easy to do if the TMP tip not lined up into the connector. Also make sure that the pins from the SUB to the RF board are not missed aligned. Howard K6IA Las Vegas ______________________________________________________________ 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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In reply to this post by m5kvk
If the TMP cable was ever pulled on to unplug the connector, there is a better than even chance the center conductor is broken.
Ben W4SC Sent from Mail for Windows 10 ______________________________________________________________ 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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On 5/28/2020 3:27 PM, w4sc wrote:
> If the TMP cable was ever pulled on to unplug the connector, there is a better than even chance the center conductor is broken. Yes, and I had the receptacle for a TMP cable come unsoldered from the circuit board in one of my K3s. 73, Jim K9YC ______________________________________________________________ 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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In reply to this post by m5kvk
Well, I’ve solved the initial problem. I stripped the rig back to its pre-KRX3A state and then re-installed: after checking performance.
I can only surmise that there was a poor connection somewhere, as basically all I did was re-installed some TMP cables. The performance of the SUB is poorer than I would expect. It receives signals OK but at a considerably (more than -3dB) lower level. 73 Gareth, M5KVK ______________________________________________________________ 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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Glad to hear you got it working. But you shouldn’t be seeing a signifiant difference between the two receivers, unless something is set differently between them, or there’s another issue floating around.
Grant NQ5T > On May 31, 2020, at 12:36 PM, Gareth M5KVK <[hidden email]> wrote: > > Well, I’ve solved the initial problem. I stripped the rig back to its pre-KRX3A state and then re-installed: after checking performance. > > I can only surmise that there was a poor connection somewhere, as basically all I did was re-installed some TMP cables. > > The performance of the SUB is poorer than I would expect. It receives signals OK but at a considerably (more than -3dB) lower level. > > 73 > > Gareth, M5KVK > > ______________________________________________________________ > 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] ______________________________________________________________ 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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It seems to have been a transient. Signals appear to be comparable this morning.
This is all by ear of course. 73 Gareth, M5KVK On 31/05/2020, 18:09, "Grant Youngman" <[hidden email]> wrote: Glad to hear you got it working. But you shouldn’t be seeing a signifiant difference between the two receivers, unless something is set differently between them, or there’s another issue floating around. Grant NQ5T > On May 31, 2020, at 12:36 PM, Gareth M5KVK <[hidden email]> wrote: > > Well, I’ve solved the initial problem. I stripped the rig back to its pre-KRX3A state and then re-installed: after checking performance. > > I can only surmise that there was a poor connection somewhere, as basically all I did was re-installed some TMP cables. > > The performance of the SUB is poorer than I would expect. It receives signals OK but at a considerably (more than -3dB) lower level. > > 73 > > Gareth, M5KVK > > ______________________________________________________________ > 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] ______________________________________________________________ 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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In reply to this post by m5kvk
Hi All
I just wanted to put on record my thanks to all those who offered advice and support as I worked through the issue with my KRX3A. It’s all working now. For the record, I think it was a poor connection caused by one of the TMP cables not being engaged fully. 73 Gareth, M5KVK ______________________________________________________________ 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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