Re: [Elecraft] Soon to be an Elecraft(er)!
Yes, thank you Matt for the explanation. I obviously didn't think it through as well as I should have. - Brendon KK6AYI On Fri, Oct 7, 2016 at 12:22 PM, Matt Maguire wrote: > Hi Brendon, > > In a way you are right, but consider this: the per-band nulling procedure > is to compensate for amplitude and phase variations introduced in the LO > and quad mixer which can be different from band to band. However, when you > put a roofing filter in the signalling path, it will introduce a further > amplitude and phase imbalance (which as you say will be the same for all > bands). The per-band nulling parameters you set up before adding the > roofing filter will all need to be adjusted to take the impact of the > roofing filter into account. This is why you should repeat the whole > nulling calibration for each band when you add a roofing filter. Does this > make any sense? > > 73, Matt VK2RQ > > _ > From: Brendon Whateley > Sent: Saturday, October 8, 2016 3:00 am > Subject: Re: [Elecraft] Soon to be an Elecraft(er)! > To: Matt Maguire > Cc: Elecraft Reflector Reflector , Ray Sills < > raysil...@verizon.net> > > > > Given my understanding of the roofing filter design in the KX3, I don't > think there is any per-band adjustments to make. IIRC, the filter is an > analog low-pass filter that operates after the direct down-conversion. > > If I'm wrong, then please set me straight. Especially because I'm > considering adding the filter to my KX3. > > - Brendon > > On Thu, Oct 6, 2016 at 11:35 PM, Matt Maguire > wrote: > >> Does the factory do a full per-band calibration, or do they just >> calibrate on 20m and extrapolate? If the latter I'd suggest to do the full >> per-band calibration yourself even for a factory-fitted roofing filter, as >> it does make a difference (obviously back up your config first so you can >> restore to factory settings/calibration if needed) >> >> 73, Matt VK2RQ >> >> >> >> >> On Fri, Oct 7, 2016 at 5:38 AM +1100, "Ray Sills" >> wrote: >> >> >> >> >> >> >> >> >> >> >> Also, IF you order the roofing filter for the KX3…. even with a kit >> purchase…. the factory will calibrate it for you, so all you need do is >> install the little board. They have a test jig, so that the filter will be >> tested with YOUR particular main board. Best of both worlds… save some >> money, and get free factory calibration. >> >> 73 de Ray >> K2ULR >> KX3 #211 >> >> >> > On Oct 6, 2016, at 12:00 PM, Walter Underwood wrote: >> > >> > The roofing filters require some calibration. If they are >> factory-installed, Elecraft does that for you. All the other options are >> exactly the same whether factory-installed or user-installed. >> > >> > wunder >> > K6WRU >> > Walter Underwood >> > CM87wj >> > http://observer.wunderwood.org/ (my blog) >> >> __ >> 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 >> Message delivered to matt.vk...@gmail.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 >> Message delivered to bren...@whateley.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 Message delivered to arch...@mail-archive.com
[Elecraft] [K3] KIO3 wanted
I am looking for a set of KIO3 boards (no longer available from Elecraft since the introduction of the KIO3B) to replace a board in one of my K3s with a damaged component. Please email me if you have a set you would be willing part with, and include the serial number of the K3 they came from and proposed price and, if applicable, any known issues regarding condition. I would also consider the KIO3 Audio I/O Module daughterboard (Elecraft part no. E850236) only, but would prefer a full set. 73, John, W6LD This email and any attachments thereto may contain private, confidential, and privileged material for the sole use of the intended recipient. Any review, copying, or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email and any attachments thereto. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Soon to be an Elecraft(er)!
Hi Brendon, In a way you are right, but consider this: the per-band nulling procedure is to compensate for amplitude and phase variations introduced in the LO and quad mixer which can be different from band to band. However, when you put a roofing filter in the signalling path, it will introduce a further amplitude and phase imbalance (which as you say will be the same for all bands). The per-band nulling parameters you set up before adding the roofing filter will all need to be adjusted to take the impact of the roofing filter into account. This is why you should repeat the whole nulling calibration for each band when you add a roofing filter. Does this make any sense? 73, Matt VK2RQ _ From: Brendon Whateley Sent: Saturday, October 8, 2016 3:00 am Subject: Re: [Elecraft] Soon to be an Elecraft(er)! To: Matt Maguire Cc: Elecraft Reflector Reflector , Ray Sills Given my understanding of the roofing filter design in the KX3, I don't think there is any per-band adjustments to make. IIRC, the filter is an analog low-pass filter that operates after the direct down-conversion. If I'm wrong, then please set me straight. Especially because I'm considering adding the filter to my KX3. - Brendon On Thu, Oct 6, 2016 at 11:35 PM, Matt Maguire wrote: Does the factory do a full per-band calibration, or do they just calibrate on 20m and extrapolate? If the latter I'd suggest to do the full per-band calibration yourself even for a factory-fitted roofing filter, as it does make a difference (obviously back up your config first so you can restore to factory settings/calibration if needed) 73, Matt VK2RQ On Fri, Oct 7, 2016 at 5:38 AM +1100, "Ray Sills" wrote: Also, IF you order the roofing filter for the KX3…. even with a kit purchase…. the factory will calibrate it for you, so all you need do is install the little board. They have a test jig, so that the filter will be tested with YOUR particular main board. Best of both worlds… save some money, and get free factory calibration. 73 de Ray K2ULR KX3 #211 > On Oct 6, 2016, at 12:00 PM, Walter Underwood wrote: > > The roofing filters require some calibration. If they are factory-installed, > Elecraft does that for you. All the other options are exactly the same > whether factory-installed or user-installed. > > wunder > K6WRU > Walter Underwood > CM87wj > http://observer.wunderwood.org/ (my blog) __ 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 Message delivered to matt.vk...@gmail.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 Message delivered to bren...@whateley.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Soon to be an Elecraft(er)!
Brendon, it is per band and it makes a real difference! 73, Olli Contest, DX & radio projects: http://www.dh8bqa.de Am 07.10.2016 um 17:59 schrieb Brendon Whateley: Given my understanding of the roofing filter design in the KX3, I don't think there is any per-band adjustments to make. IIRC, the filter is an analog low-pass filter that operates after the direct down-conversion. If I'm wrong, then please set me straight. Especially because I'm considering adding the filter to my KX3. - Brendon On Thu, Oct 6, 2016 at 11:35 PM, Matt Maguire wrote: Does the factory do a full per-band calibration, or do they just calibrate on 20m and extrapolate? If the latter I'd suggest to do the full per-band calibration yourself even for a factory-fitted roofing filter, as it does make a difference (obviously back up your config first so you can restore to factory settings/calibration if needed) 73, Matt VK2RQ On Fri, Oct 7, 2016 at 5:38 AM +1100, "Ray Sills" wrote: Also, IF you order the roofing filter for the KX3…. even with a kit purchase…. the factory will calibrate it for you, so all you need do is install the little board. They have a test jig, so that the filter will be tested with YOUR particular main board. Best of both worlds… save some money, and get free factory calibration. 73 de Ray K2ULR KX3 #211 On Oct 6, 2016, at 12:00 PM, Walter Underwood wrote: The roofing filters require some calibration. If they are factory-installed, Elecraft does that for you. All the other options are exactly the same whether factory-installed or user-installed. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) __ 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 Message delivered to matt.vk...@gmail.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 Message delivered to bren...@whateley.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 Message delivered to dro...@necg.de __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Soon to be an Elecraft(er)!
Given my understanding of the roofing filter design in the KX3, I don't think there is any per-band adjustments to make. IIRC, the filter is an analog low-pass filter that operates after the direct down-conversion. If I'm wrong, then please set me straight. Especially because I'm considering adding the filter to my KX3. - Brendon On Thu, Oct 6, 2016 at 11:35 PM, Matt Maguire wrote: > Does the factory do a full per-band calibration, or do they just calibrate > on 20m and extrapolate? If the latter I'd suggest to do the full per-band > calibration yourself even for a factory-fitted roofing filter, as it does > make a difference (obviously back up your config first so you can restore > to factory settings/calibration if needed) > > 73, Matt VK2RQ > > > > > On Fri, Oct 7, 2016 at 5:38 AM +1100, "Ray Sills" > wrote: > > > > > > > > > > > Also, IF you order the roofing filter for the KX3…. even with a kit > purchase…. the factory will calibrate it for you, so all you need do is > install the little board. They have a test jig, so that the filter will be > tested with YOUR particular main board. Best of both worlds… save some > money, and get free factory calibration. > > 73 de Ray > K2ULR > KX3 #211 > > > > On Oct 6, 2016, at 12:00 PM, Walter Underwood wrote: > > > > The roofing filters require some calibration. If they are > factory-installed, Elecraft does that for you. All the other options are > exactly the same whether factory-installed or user-installed. > > > > wunder > > K6WRU > > Walter Underwood > > CM87wj > > http://observer.wunderwood.org/ (my blog) > > __ > 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 > Message delivered to matt.vk...@gmail.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 > Message delivered to bren...@whateley.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 Message delivered to arch...@mail-archive.com
