Re: [Elecraft] Why Not Remove the Birdies Through a Firmware Update
Guy, Thanks for that clarification. I didn't realize that every K3 has different birdies. I will try to move the wires around as some suggested. Date: Sun, 25 Apr 2010 09:41:19 -0700 From: ml-node+4958998-702008143-44...@n2.nabble.com To: connectme...@hotmail.com Subject: Re: Why Not Remove the Birdies Through a Firmware Update The firmware does allow you to take out birdies. What you are suggesting is that the birdies are all the same for all K3's, and the list could be populated in advance by Elecraft. This is not true due to normal manufacturing variation in component values, which are used as is, and their small variation in values compensated for by digital "ranging" in the firmware. In a manner of speaking the combination of these "ranges" in a given K3 is like a fingerprint, making each k3's collection of birdies unique. It is theoretically possible to have firmware/utilityware do a scan with the RX inputs terminated, but I can guarantee that is a nasty software app, and couldn't be done in Wayne's spare time over a weekend. A birdie killer app would be neat, but. I have exactly three that bother me, all in the main RX, and I have eliminated them with the firmware provision. There are a lot of weak birdies that I can hear with open antenna jacks that go away somewhere when I put a working well matched antenna on it. I suspect that is because unterminated pieces of internal coax behave differently, but that is just a gut lurch. Then there is ambient noise, which I have here even on ten meters. I would have ambient noise on 6m if I had the preamp. Practically, birdies have to be really loud to be an issue 20m and down. One night it occurred to me, that do I really care if I can hear a birdie on a dead band? Is there even a microscopic chance I would send it back because of a birdie that I could eliminate by taking the time to table up one at a time with a firmware routine. Then it struck me that since I didn't care enough to do that, that I didn't care that much and didn't have even a microscopic chance of sending it back. If I was a six meter guy, I'd probably do the work on 6m. Takes a preamp to hear the ambient noise. 73, Guy. On Sun, Apr 25, 2010 at 3:31 AM, -.-. --.-N3TU -.-. --.- <[hidden email]> wrote: > > Wouldn't that be easier. Take a pole of all the birdies and take it out with > firmware. > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Why-Not-Remove-the-Birdies-Through-a-Firmware-Update-tp4957689p4957689.html > Sent from the [K3] mailing list archive at Nabble.com. > __ > 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 > __ 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 View message @ http://elecraft.365791.n2.nabble.com/Why-Not-Remove-the-Birdies-Through-a-Firmware-Update-tp4957689p4958998.html To unsubscribe from Why Not Remove the Birdies Through a Firmware Update, click here. _ Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1 -- View this message in context: http://elecraft.365791.n2.nabble.com/Why-Not-Remove-the-Birdies-Through-a-Firmware-Update-tp4957689p4961027.html Sent from the [K3] mailing list archive at Nabble.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] Why Not Remove the Birdies Through a Firmware Update
The firmware does allow you to take out birdies. What you are suggesting is that the birdies are all the same for all K3's, and the list could be populated in advance by Elecraft. This is not true due to normal manufacturing variation in component values, which are used as is, and their small variation in values compensated for by digital "ranging" in the firmware. In a manner of speaking the combination of these "ranges" in a given K3 is like a fingerprint, making each k3's collection of birdies unique. It is theoretically possible to have firmware/utilityware do a scan with the RX inputs terminated, but I can guarantee that is a nasty software app, and couldn't be done in Wayne's spare time over a weekend. A birdie killer app would be neat, but. I have exactly three that bother me, all in the main RX, and I have eliminated them with the firmware provision. There are a lot of weak birdies that I can hear with open antenna jacks that go away somewhere when I put a working well matched antenna on it. I suspect that is because unterminated pieces of internal coax behave differently, but that is just a gut lurch. Then there is ambient noise, which I have here even on ten meters. I would have ambient noise on 6m if I had the preamp. Practically, birdies have to be really loud to be an issue 20m and down. One night it occurred to me, that do I really care if I can hear a birdie on a dead band? Is there even a microscopic chance I would send it back because of a birdie that I could eliminate by taking the time to table up one at a time with a firmware routine. Then it struck me that since I didn't care enough to do that, that I didn't care that much and didn't have even a microscopic chance of sending it back. If I was a six meter guy, I'd probably do the work on 6m. Takes a preamp to hear the ambient noise. 73, Guy. On Sun, Apr 25, 2010 at 3:31 AM, -.-. --.-N3TU -.-. --.- wrote: > > Wouldn't that be easier. Take a pole of all the birdies and take it out with > firmware. > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Why-Not-Remove-the-Birdies-Through-a-Firmware-Update-tp4957689p4957689.html > Sent from the [K3] mailing list archive at Nabble.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 > __ 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] Why Not Remove the Birdies Through a Firmware Update
>From what I understand, the method used to "remove" birdies in the K3 although clever does not actually remove them, but moves them out of hearing. Before moving all of the Rx birdies using firmware, IMHO it would be wise to take a *comprehensive* look at the transmitter spurs as well, because in a TRANSCEIVER if there are Rx birdie problems present chances are that there could be some Tx spurs which need to be addressed. Unfortunately and obviously Tx spurs cannot simply be moved in frequency using firmware, but if a problem must be reduced in amplitude. Often one result of such work on a transceiver's Tx spurs is to reduce / eliminate some Rx birdies as well. 73, Geoff GM4ESD "-.-. --.-N3TU -.-. --.-" wrote on Sunday, April 25, 2010 at 8:31 AM: > Wouldn't that be easier. Take a pole of all the birdies and take it out > with > firmware. __ 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
