Re: [Elecraft] [k3] 6m birdies
All, Be sure that the antenna has been disconnected and a good dummy load is connected in its place to the antenna port via a very short piece of known-good coax. Better to have a 50 ohm termination connected directly to the antenna port. 73 Gene K1NR K2 6K On Wed, 06 Jul 2011 21:14:02 -0400 Don Wilhelm wrote: > Johnny, > > Yes, that is an excellent suggestion, especially if the > K3 power supply > is a switcher. > > 73, > Don W3FPR > > On 7/6/2011 9:05 PM, Johnny Siu wrote: > > Hello Don, > > > > I would even play a more safe game to distinguish > whether it is a true birdie. How about using a 12v > battery instead of a power supply unit during the test? > > > > TNX& 73, > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html - Web mail provided by NuNet, Inc. The Premier National provider. http://www.nni.com/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [k3] 6m birdies
Johnny, Yes, that is an excellent suggestion, especially if the K3 power supply is a switcher. 73, Don W3FPR On 7/6/2011 9:05 PM, Johnny Siu wrote: > Hello Don, > > I would even play a more safe game to distinguish whether it is a true > birdie. How about using a 12v battery instead of a power supply unit during > the test? > > TNX& 73, > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [k3] 6m birdies
Hello Don, I would even play a more safe game to distinguish whether it is a true birdie. How about using a 12v battery instead of a power supply unit during the test? TNX & 73, Johnny VR2XMC 從︰ Don Wilhelm 收件人︰ "elecraft@mailman.qth.net" 傳送日期︰ 2011年07月7日 (週四) 8:35 AM 主題︰ Re: [Elecraft] [k3] 6m birdies It may just be my more or less casual observation, but --- Many seem to becoming "loose" on what is defined as a "birdie". Proper use of the term is to refer to a "fast tuning" signal that is produced by the receiver's mixing scheme and the harmonics thereof. That is a true "birdie". Other annoying signals can be heard which originate from something other than the receiver itself. Those signals are real signals (whether desired or not) that are picked up by the antenna. For true receiver birdies, re-orienting the TMP cables and/or the use of the Signal Removal Tool in the K3 can be effective, but for signals that originate outside the K3, the only real cure is to suppress them at the source. Yes, I understand that identifying the true source can be a burdensome chore, but differentating between internal receiver "birdies" and external signal sources is a good starting point. Terminate the K3 antenna input with a well shielded dummy load (with a very short length of coax), and if the "birdie" is still present, it is a true receiver birdie, but if it is no longer present, it is a real signal and the source must be found to eliminate it with ferrites or other suppression devices. 73, Don W3FPR On 7/6/2011 6:04 PM, Mike Rodgers wrote: > I have a birdie at 50.09465 cw normal not rev on a cold k3 and the one at > 14.186. The latter being weaker and neither adding to the s meter. My shack > has no computers but a wal wart or two so I can confirm those two. > Auto notch has no effect. > > I believe as Tom mentioned there is a method to remove them or that specific > frequency they are on ( not sure which) but I havnt been bothered enough by > them yet. > > 73 > Mike R > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [k3] 6m birdies
It may just be my more or less casual observation, but --- Many seem to becoming "loose" on what is defined as a "birdie". Proper use of the term is to refer to a "fast tuning" signal that is produced by the receiver's mixing scheme and the harmonics thereof. That is a true "birdie". Other annoying signals can be heard which originate from something other than the receiver itself. Those signals are real signals (whether desired or not) that are picked up by the antenna. For true receiver birdies, re-orienting the TMP cables and/or the use of the Signal Removal Tool in the K3 can be effective, but for signals that originate outside the K3, the only real cure is to suppress them at the source. Yes, I understand that identifying the true source can be a burdensome chore, but differentating between internal receiver "birdies" and external signal sources is a good starting point. Terminate the K3 antenna input with a well shielded dummy load (with a very short length of coax), and if the "birdie" is still present, it is a true receiver birdie, but if it is no longer present, it is a real signal and the source must be found to eliminate it with ferrites or other suppression devices. 73, Don W3FPR On 7/6/2011 6:04 PM, Mike Rodgers wrote: > I have a birdie at 50.09465 cw normal not rev on a cold k3 and the one at > 14.186. The latter being weaker and neither adding to the s meter. My shack > has no computers but a wal wart or two so I can confirm those two. > Auto notch has no effect. > > I believe as Tom mentioned there is a method to remove them or that specific > frequency they are on ( not sure which) but I havnt been bothered enough by > them yet. > > 73 > Mike R > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 6m birdies
I got one at 28.13471Mhz and reduced it by moving the TMP cable between J84 and J85 of KRX3. Moving the TMP cables does have effect on the birdies. Just try to resit and change the positions of the TMP cables, you will get some improvements. TNX & 73, Johnny VR2XMC 從︰ Mike Rodgers 收件人︰ Robert Redmon 副本(CC)︰ "elecraft@mailman.qth.net" 傳送日期︰ 2011年07月7日 (週四) 6:04 AM 主題︰ Re: [Elecraft] [k3] 6m birdies I have a birdie at 50.09465 cw normal not rev on a cold k3 and the one at 14.186. The latter being weaker and neither adding to the s meter. My shack has no computers but a wal wart or two so I can confirm those two. Auto notch has no effect. I believe as Tom mentioned there is a method to remove them or that specific frequency they are on ( not sure which) but I havnt been bothered enough by them yet. 73 Mike R Sent from my spy ring On Jul 6, 2011, at 12:44 PM, Robert Redmon wrote: > I also have a pretty strong (-120dbm) and annoying 6 meter birdie. It is when > I am in cw mode and moves when I tune, intersecting with the passband at > 50096 or so . It moves with VFO tuning, but at a much higher rate (viewing on > the P3). When I have tuned 1 khz higher, it has moved almost seven khz > higher. It also seems to drift a bit...unlike the stationary (internal) > birdies that are rather weak and stable. I have cleaned up my cabling and > tried to make sure all the boards and case bits were bonded properly, but > those efforts have had no effect. I have noticed a similar birdie on 20 > meters (ssb) around 14186 or so, but it moves opposite the direction of > tuning. My efforts seem to have had no effect on them (including Sig Rmv). I > have been told I will just have to live with them, and I can, but it is > frustrating nonetheless. > > Bob K5SM > > On 7/6/2011 8:31 AM, Mike Rodgers wrote: >> None of those 6m birdies here in Texas >> >> 73 >> Mike R >> >> Date: Mon, 04 Jul 2011 13:45:11 -0400 >> From: John Ragle >> Subject: Re: [Elecraft] Zipper Noise and Birdies on 6M -- FIXED! >> To: elecraft@mailman.qth.net >> Message-ID:<4e11fc27.7090...@crocker.com> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >> Allen... >> >> I have these same birdies (at least I suppose they're the same) and >> I suspect that all K3 have them. The most annoying ones are where the CW >> action usually occurs (50.09430, 20 dB above noise floor) and a number >> of minor ones around 50.098 (3-5 dB above the noise floor), as well as >> several major ones up where the SSB action occurs: 50.21050, 50.24055, >> etc. which are all 20+ dB above the noise floor. These are not >> "external" blips (not computer, not router, etc.) as they are present >> when nothing else is on, and they are present when the antenna is >> disconnected. >> >> I "treat" them by ignoring them. They are sharp, stable, and >> unmodulated. My ear can differentiate between them and real signals >> without any problem. They are "features" for "calibration.".. ;>) Every >> modern rig I have ever owned has had similar warts. >> >> John Ragle -- W1ZI >> >> 73 >> Mike R >> >> >> Sent from my spy ring >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [k3] 6m birdies
I have a birdie at 50.09465 cw normal not rev on a cold k3 and the one at 14.186. The latter being weaker and neither adding to the s meter. My shack has no computers but a wal wart or two so I can confirm those two. Auto notch has no effect. I believe as Tom mentioned there is a method to remove them or that specific frequency they are on ( not sure which) but I havnt been bothered enough by them yet. 73 Mike R Sent from my spy ring On Jul 6, 2011, at 12:44 PM, Robert Redmon wrote: > I also have a pretty strong (-120dbm) and annoying 6 meter birdie. It is when > I am in cw mode and moves when I tune, intersecting with the passband at > 50096 or so . It moves with VFO tuning, but at a much higher rate (viewing on > the P3). When I have tuned 1 khz higher, it has moved almost seven khz > higher. It also seems to drift a bit...unlike the stationary (internal) > birdies that are rather weak and stable. I have cleaned up my cabling and > tried to make sure all the boards and case bits were bonded properly, but > those efforts have had no effect. I have noticed a similar birdie on 20 > meters (ssb) around 14186 or so, but it moves opposite the direction of > tuning. My efforts seem to have had no effect on them (including Sig Rmv). I > have been told I will just have to live with them, and I can, but it is > frustrating nonetheless. > > Bob K5SM > > On 7/6/2011 8:31 AM, Mike Rodgers wrote: >> None of those 6m birdies here in Texas >> >> 73 >> Mike R >> >> Date: Mon, 04 Jul 2011 13:45:11 -0400 >> From: John Ragle >> Subject: Re: [Elecraft] Zipper Noise and Birdies on 6M -- FIXED! >> To: elecraft@mailman.qth.net >> Message-ID:<4e11fc27.7090...@crocker.com> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >> Allen... >> >> I have these same birdies (at least I suppose they're the same) and >> I suspect that all K3 have them. The most annoying ones are where the CW >> action usually occurs (50.09430, 20 dB above noise floor) and a number >> of minor ones around 50.098 (3-5 dB above the noise floor), as well as >> several major ones up where the SSB action occurs: 50.21050, 50.24055, >> etc. which are all 20+ dB above the noise floor. These are not >> "external" blips (not computer, not router, etc.) as they are present >> when nothing else is on, and they are present when the antenna is >> disconnected. >> >> I "treat" them by ignoring them. They are sharp, stable, and >> unmodulated. My ear can differentiate between them and real signals >> without any problem. They are "features" for "calibration.".. ;>) Every >> modern rig I have ever owned has had similar warts. >> >> John Ragle -- W1ZI >> >> 73 >> Mike R >> >> >> Sent from my spy ring >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [k3] 6m birdies
I also have a pretty strong (-120dbm) and annoying 6 meter birdie. It is when I am in cw mode and moves when I tune, intersecting with the passband at 50096 or so . It moves with VFO tuning, but at a much higher rate (viewing on the P3). When I have tuned 1 khz higher, it has moved almost seven khz higher. It also seems to drift a bit...unlike the stationary (internal) birdies that are rather weak and stable. I have cleaned up my cabling and tried to make sure all the boards and case bits were bonded properly, but those efforts have had no effect. I have noticed a similar birdie on 20 meters (ssb) around 14186 or so, but it moves opposite the direction of tuning. My efforts seem to have had no effect on them (including Sig Rmv). I have been told I will just have to live with them, and I can, but it is frustrating nonetheless. Bob K5SM On 7/6/2011 8:31 AM, Mike Rodgers wrote: > None of those 6m birdies here in Texas > > 73 > Mike R > > Date: Mon, 04 Jul 2011 13:45:11 -0400 > From: John Ragle > Subject: Re: [Elecraft] Zipper Noise and Birdies on 6M -- FIXED! > To: elecraft@mailman.qth.net > Message-ID:<4e11fc27.7090...@crocker.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Allen... > > I have these same birdies (at least I suppose they're the same) and > I suspect that all K3 have them. The most annoying ones are where the CW > action usually occurs (50.09430, 20 dB above noise floor) and a number > of minor ones around 50.098 (3-5 dB above the noise floor), as well as > several major ones up where the SSB action occurs: 50.21050, 50.24055, > etc. which are all 20+ dB above the noise floor. These are not > "external" blips (not computer, not router, etc.) as they are present > when nothing else is on, and they are present when the antenna is > disconnected. > > I "treat" them by ignoring them. They are sharp, stable, and > unmodulated. My ear can differentiate between them and real signals > without any problem. They are "features" for "calibration.".. ;>) Every > modern rig I have ever owned has had similar warts. > > John Ragle -- W1ZI > > 73 > Mike R > > > Sent from my spy ring > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [k3] 6m birdies
None of those 6m birdies here in Texas 73 Mike R Date: Mon, 04 Jul 2011 13:45:11 -0400 From: John Ragle Subject: Re: [Elecraft] Zipper Noise and Birdies on 6M -- FIXED! To: elecraft@mailman.qth.net Message-ID: <4e11fc27.7090...@crocker.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Allen... I have these same birdies (at least I suppose they're the same) and I suspect that all K3 have them. The most annoying ones are where the CW action usually occurs (50.09430, 20 dB above noise floor) and a number of minor ones around 50.098 (3-5 dB above the noise floor), as well as several major ones up where the SSB action occurs: 50.21050, 50.24055, etc. which are all 20+ dB above the noise floor. These are not "external" blips (not computer, not router, etc.) as they are present when nothing else is on, and they are present when the antenna is disconnected. I "treat" them by ignoring them. They are sharp, stable, and unmodulated. My ear can differentiate between them and real signals without any problem. They are "features" for "calibration.".. ;>) Every modern rig I have ever owned has had similar warts. John Ragle -- W1ZI 73 Mike R Sent from my spy ring __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
