[Elecraft] K2: 40m bandpass filter
Don W3FPR: A query about C228 a few days ago prompted me to look at my own K2 manual which does not show C228. Unless my old grey cells deceive me, I recall the 40m bandpass filter being changed several years ago. In fact, I have found an old envelope in which I have gathered together the necessary five capacitors to make the change. My question is: What was the reason for the change of the 40m bandpass filter and is it worth doing? BTW, I do use my K2 on 60m. 73 de David G4DMP -- David G4DMP Leeds, England, UK -- __ 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] K2: 40m bandpass filter
All the proposed changes to the 40 m bandpass were, as far as I can recall, intended to decrease the bandwidth from 300 kHz to 200 or 100 kHz. These modifications can be found here: Elecraft's http://www.elecraft.com/Apps/eu_40_meter_narrow_bandpass_filt.htm EU 40 Meter Narrow Bandpass Filter and http://www.dl7maj.de/Modifications%20for%20BPF.pdf DL7MAJ's proposal which is almost the same as Elecraft's for 40 m. However, with the increase in 40 m allocation in Europe (region 1) some years ago and the decrease in the number of strong broadcast stations, these changes should not be necessary any more. I changed my 40 m bandpass back to the original one several years ago for this reason. David Pratt-4 wrote: I recall the 40m bandpass filter being changed several years ago. - Sverre, LA3ZA K2 #2198, K3 #3391 http://www.qslnet.de/member/la3za/K2/mod.html LA3ZA Unofficial Guide to K2 modifications -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-40m-bandpass-filter-tp5924328p5924452.html Sent from the Elecraft 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] UK Elecraft Net Sunday 16th Jan
I will be running the UK Elecraft net this Sunday 16th January as Ian G0VGS is unavailable and asked if I could act as net control. Recently I bought a P3 and 2nd RX for my K3 and will be able to give an update on the latest beta firmware for the P3... Frequency 3658 KHz +/- QRM at 0900z 73 Dave, G4AON K3/100 serial no 80, P3 serial no 1005 __ 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 People
John,I see today Elecraft as the new born of an old out of busineee company who all of us remember for sure,Heathkit,that glorius company who made us feel proud of american built radios,it was a shame they went out of business on the 60' because as me,there were many hams who built radios and amp that worked fine,so this team we have at Elecraft has brought us back that old forgotten feeling to assemble by our own radios,amps,watmeters,etc Elecraft will be on business for many years for sure,their products are the best on the market no matter what others might believe and we the users are helping them to improve further more the quality. Lets drink a cup of champagne and wish Elecraft a succesful future!! 73 to all users. Hector AD4C K3 # 2192 If freedom means something,it is the right to tell others what they don't want to hear –George Orwell --- On Sat, 1/15/11, VK7JB zen...@netspace.net.au wrote: From: VK7JB zen...@netspace.net.au Subject: Re: [Elecraft] K3 People To: elecraft@mailman.qth.net Date: Saturday, January 15, 2011, 2:21 AM Hi Joe, I'd like to second your sentiments and thank all the folks that contribute to bringing the Elecraft experience to my door. I've built a K1, K2, many mini-modules and am about to put together a K3. I've had a ball. None of it would have been possible without the care and attention given to the packing and assembling, shipping and support by all the folks at Elecraft whom we never get to know beyond their names on the slips of paper in all those little packets or at the bottom of invoices and shipping lists. Thanks to you all from me, down here. John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-People-tp5922917p5923982.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] K2: 40m bandpass filter
Thank you very much, Sverre; I now remember it. I shall not make the change, particularly as I rarely operate above 7100 kHz anyway. 73 de David G4DMP In a recent message, Sverre Holm (LA3ZA) la...@nrrl.no writes All the proposed changes to the 40 m bandpass were, as far as I can recall, intended to decrease the bandwidth from 300 kHz to 200 or 100 kHz. These modifications can be found here: Elecraft's http://www.elecraft.com/Apps/eu_40_meter_narrow_bandpass_filt.htm EU 40 Meter Narrow Bandpass Filter and http://www.dl7maj.de/Modifications%20for%20BPF.pdf DL7MAJ's proposal which is almost the same as Elecraft's for 40 m. However, with the increase in 40 m allocation in Europe (region 1) some years ago and the decrease in the number of strong broadcast stations, these changes should not be necessary any more. I changed my 40 m bandpass back to the original one several years ago for this reason. __ 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 Bandwidth in data mode
I can't find this in the manual so here goes. Any ideas how to increase the bandwidth when the K3 is in data mode? Right now, it's will only open to 200 hz and it's too narrow to tune around the band looking for rtty signals. Thanks. Larry, KN8N __ 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 Bandwidth in data mode
LOoks like you haven't assigned your wider filters in data mode so the K3 knows it can use them. You can do this through the K3 Utility. Larry Boekeloo wrote: I can't find this in the manual so here goes. Any ideas how to increase the bandwidth when the K3 is in data mode? Right now, it's will only open to 200 hz and it's too narrow to tune around the band looking for rtty signals. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Bandwidth-in-data-mode-tp5924655p5924718.html Sent from the Elecraft 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] K2: 40m bandpass filter
David, The 40 meter LPF was changed to an elliptical filter - you can see by comparing the old and new circuits. I am not certain of the reason, but I have assumed that it provides better performance for both 50 and 40 meters (better harmonic rejection for 60 meters). 73, Don W3FPR On 1/15/2011 3:21 AM, David Pratt wrote: Don W3FPR: A query about C228 a few days ago prompted me to look at my own K2 manual which does not show C228. Unless my old grey cells deceive me, I recall the 40m bandpass filter being changed several years ago. In fact, I have found an old envelope in which I have gathered together the necessary five capacitors to make the change. My question is: What was the reason for the change of the 40m bandpass filter and is it worth doing? BTW, I do use my K2 on 60m. 73 de David G4DMP __ 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] P3: VFO A marker gone
While I love the new firmware, I mourn the loss of the white VFO A marker that used to repose vertically in the center of the display. Now that VFO A could be anywhere, it would be really handy to be able to quickly recognize exactly where it is in the screen (you do have a sense of where it is from the blue bandpass marker at the bottom of the display, but that can encompass a lot of frequency space!). 73, Tom W4KX __ 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] K2: 40m bandpass filter
Sorry, I saw C228 through my morning eyes and answered about the LPF, but the question was about the BPF - it has been answered by Sverre. 73, Don W3FPR On 1/15/2011 8:56 AM, Don Wilhelm wrote: David, The 40 meter LPF was changed to an elliptical filter - you can see by comparing the old and new circuits. I am not certain of the reason, but I have assumed that it provides better performance for both 50 and 40 meters (better harmonic rejection for 60 meters). 73, Don W3FPR On 1/15/2011 3:21 AM, David Pratt wrote: Don W3FPR: A query about C228 a few days ago prompted me to look at my own K2 manual which does not show C228. Unless my old grey cells deceive me, I recall the 40m bandpass filter being changed several years ago. In fact, I have found an old envelope in which I have gathered together the necessary five capacitors to make the change. My question is: What was the reason for the change of the 40m bandpass filter and is it worth doing? BTW, I do use my K2 on 60m. 73 de David G4DMP __ 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 Bandwidth in data mode
Houston, we have a problem. When I go to data mode, PSK31 or RTTY, I have the full bandwidth of the selected roofing filter displayed on the DM780 waterfall. I ran through all the different data modes and there are subtle changes but nothing like you describe. The only way I can duplicate your problem in by adjusting the WIDTH control which I keep set at 2.8 for my 2.8 filter, 1.0 for my selected filter for data modes. 73s Jim, W4ATK On Jan 15, 2011, at 7:12 AM, Larry Boekeloo wrote: I can't find this in the manual so here goes. Any ideas how to increase the bandwidth when the K3 is in data mode? Right now, it's will only open to 200 hz and it's too narrow to tune around the band looking for rtty signals. Thanks. Larry, KN8N __ 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 JIM ROGERS w4...@bellsouth.net http://web.me.com/jimrogers_w4atk __ 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] Solved - XV144, XV222, XV432
Thanks to many of you on the list, I have 3 pretty happy transverters. Heat problem - solved by replacing thermal pad between heat spreader and case. Use Thermalcote heatsink grease instead. Scraped paint off the case under screw heads, using a cylindrical dremel bit, for all 3 XVs. Replaced the black screws with chrome or stainless on the XV432. This helped the output substantially. XV144 - the supplied crystal is out of range, and Elecraft will be replacing. Turns out they started using same one for XV144 and the internal K144XV. But XV144 will be more than 10KHz off, so you can't correct for it. I added a small series variable inductor between xtal and ground, and this helped me get it within 5KHz. You can't bend these crystals very far. XV222 - I removed L19, jumpered it out, and replaced C12 with a variable capacitor. Schematic says 12pF, assembly guide 18pF, and a variable let me get the frequency within a few hertz. XV432 - drilled a couple holes near U6 and jumpered top to bottom. There just arent enough vias on this board. Replaced my U6. Output now pretty stable. I still think PA Bias instructions in alignment are wrong for this unit. Fan wires would not go through the big via, so I soldered it at the diode on the top of the board. 73 VE3MSC Colin __ 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 Bandwidth in data mode
Thanks for all of the responses. I have the filters set correctly now and I've made several contacts already this morning in BPSK and RTTY. Thanks again. Larry, KN8N __ 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] K2 SSB Receive issue
I recently finished aligning my K2 with the spectrogram software and with the procedures from Elecraft. I am able to receive SSB on all bands except on 21m and 12m. The SSB signal is very distorted and sounds like the filter is not wide enough to receive the SSB signal. I completed all of the alignments in the manual without any issues. I know I must have missed something small but cannot figure it out. Before I start to adjust anything on the K2, does anyone have any suggestions? -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925220.html Sent from the [K2] 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] K2 SSB Receive issue
I am going to make 2 assumptions - correct me if they are wrong. 1) You do not have the KSB2 installed with its fixed 2.4 kHz width filter, and you are attempting to use the variable IF filter at wide widths. 2) Your K2 has a serial number somewhere near 6800. If those conditions are true, the 1SV149 varactors in your kit have a greater capacitance range than with the older varactors. What that means is that your wide filters (above about 1.00 kHz) are much wider than indicated on the K2 display. On one K2 I recently aligned a filter indicated as 1.70 was actually 2.4 kHz wide. That is the most variation I have observed in many K2s that I have aligned, more typically an indicated filter width of 1.90 would be about 2.4 kHz wide. What that means is that the BFO frequencies listed in the manual will be about correct for the LSB filters, but are nowhere near correct for USB. The only way I know to correct this situation is to use Spectrogram to measure the actual filter width. Set the BFO for LSB about correct first, then reduce the width of the filter to whatever width you would like - I use 2.4 kHz for FL1, 2.2 for FL2, 2.0 for FL3 and 1.8 for FL4. Those are the Spectrogram measured widths, not the K2 indicated widths. After setting the filter widths, then trim up the LSB BFOs to place the upper corner of the left passband slope close to 300 Hz and then switch to USB and adjust the BFO so the upper passband corner is positioned also at 300 Hz. You can find some information about using Spectrogram on Tom Hammond's website www.n0ss.net and also in part 3 of the K2 Dial Calibration article on my website www.w3fpr.com. 73, Don W3FPR On 1/15/2011 1:36 PM, KA1YMX wrote: I recently finished aligning my K2 with the spectrogram software and with the procedures from Elecraft. I am able to receive SSB on all bands except on 21m and 12m. The SSB signal is very distorted and sounds like the filter is not wide enough to receive the SSB signal. I completed all of the alignments in the manual without any issues. I know I must have missed something small but cannot figure it out. Before I start to adjust anything on the K2, does anyone have any suggestions? __ 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] Elecraft SSB net announcement
The weekly SSB net will meet tomorrow at 1800Z on 14.314 MHz. Ken, KO5Y, with help from Paul, AD5SX, will be the net control station(s) from New Mexico. Have a great net. 73, Phil, NS7P __ 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 line out
I've starting using the K3 line out for the first time driving some powered speakers and really enjoying some great sounds. But I was surprised to find that with my subreceiver turned OFF, there is no audio on the line out right channel. I was expecting mono audio with main rx heard through both L R channels. The subreceiver audio comes through fine on the right channel when it's turned on. Can some other folks please check their K3 line out and please let me know if you hear the same thing? Perhaps this is by design. Thanks 73, Barry N1EU -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-line-out-tp5925339p5925339.html Sent from the Elecraft 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] K3 Phone Output On RP Less Than Front Panel
After working for many months my K3 now has less phone audio at the rear panel out put than the front panel. Until now, the headphones and internal speaker worked equally well with the AF control at 9 o'clock. Now the rear panel STEREO/PHONE output must be at 12 or 1 o'clock to close to the internal speaker and/or front panel phones output. Any suggestions for troubleshooting would be appreciated! Jack, AE6GC __ 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 line out
It is by design. Line out is Left for main Rx and Right for Sub Rx. You can set Line Out=Phones and get the audio mixer, but the output level will also vary with the AF Gain control in that case. 73, Lyle KK7P Can some other folks please check their K3 line out and please let me know if you hear the same thing? Perhaps this is by design. __ 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] P3 in TX consideration/suggestions ... maybe stupid
Hi guys ! I noticed P3 is out of game at tx time, in rx it is simply wonderful. I wonder if it should be possible/useful/intelligent to display at it during tx time info such as : RF power SWR value ALC value in big fonts in order to read values at a glance Wonderful ,in my opinion, it should be to have at it in future a digital vector wattmeter (maybe it's already in plan) What do you feel ? Is this a stupid and void proposal or not ? Thanks everybody for reading, 73 de Giorgio -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-in-TX-consideration-suggestions-maybe-stupid-tp5925385p5925385.html Sent from the Elecraft 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] K3 line out
KK7P wrote: You can set Line Out=Phones and get the audio mixer, but the output level will also vary with the AF Gain control in that case. Beautiful - thanks Lyle (for the response and for coding the feature)! 73, Barry N1EU -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-line-out-tp5925339p5925420.html Sent from the Elecraft 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] K2 SSB Receive issue
I am sorry I should have mentioned I have the KSB2 SSB board installed. I followed the K2 Dial calibration procedures on your website to verify everything is aligned properly and it is. I checked for SSB reception on 21m and 12m and the SSB audio is still distorted. All other bands work below 21m. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925439.html Sent from the [K2] 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] K2 SSB Receive issue
This may or may not be relevant but low side mixing is used on 15m, 12m and 10m where distortion is heard, and high side mixing on the lower frequency bands where distortion is not heard. 73, Geoff GM4ESD KA1YMX wrote on Saturday, January 15, 2011 at 9:04 PM: I am sorry I should have mentioned I have the KSB2 SSB board installed. I followed the K2 Dial calibration procedures on your website to verify everything is aligned properly and it is. I checked for SSB reception on 21m and 12m and the SSB audio is still distorted. All other bands work below 21m. __ 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] K2 SSB Receive issue
I shouldn't have used the word distortion. The SSB stations are completely unreadable, very similar to a narrow filter. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925482.html Sent from the [K2] 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] P3 in TX consideration/suggestions ... maybe stupid
Great ideas, some of which are already on the list. Note the SENSOR connector on the back of the P3. 73, Wayne N6KR On Jan 15, 2011, at 12:24 PM, ik1bxn wrote: Hi guys ! I noticed P3 is out of game at tx time, in rx it is simply wonderful. I wonder if it should be possible/useful/intelligent to display at it during tx time info such as : RF power SWR value ALC value in big fonts in order to read values at a glance __ 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] P3 in TX consideration/suggestions ... maybe stupid
Thanks Wayne. Yes, just looking to the rear panel I thought vector wattmeter (or something like that) maybe is already in plan :-) 73 Giorgio IK1BXN -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-in-TX-consideration-suggestions-maybe-stupid-tp5925385p5925562.html Sent from the Elecraft 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] K2 SSB Receive issue
Is your reference to 21m a typo instead of 20m, or are you referring to the 21 MHz band which is 15m. Are you choosing USB for the 20m, 17m, 15m, 12m and 10m bands?. How does the LSB signals on 80m and 40m sound? The sideband inversion Geoff mentioned is such that on 15m, 12m and 10m, the actual sideband being used is the same as LSB on 80 and 40. The K2 automatically accounts for the inversion, and displays the mode as USB which is correct. 73, Don W3FPR On 1/15/2011 4:04 PM, KA1YMX wrote: I am sorry I should have mentioned I have the KSB2 SSB board installed. I followed the K2 Dial calibration procedures on your website to verify everything is aligned properly and it is. I checked for SSB reception on 21m and 12m and the SSB audio is still distorted. All other bands work below 21m. __ 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] Re： Solved - XV144, XV222, XV432
Thanks for good summary. It was quite a huge investment in 3 transverters and certainly you would expect more value for money. Your suggestions could be the manual errata. cheers, Johnny VR2XMC 寄件人﹕ Colin VE3MSC ve3...@cogeco.ca 收件人﹕ Elecraft Reflector elecraft@mailman.qth.net 傳送日期﹕ 2011/1/15 (六) 10:35:27 PM 主題： [Elecraft] Solved - XV144, XV222, XV432 Thanks to many of you on the list, I have 3 pretty happy transverters. Heat problem - solved by replacing thermal pad between heat spreader and case. Use Thermalcote heatsink grease instead. Scraped paint off the case under screw heads, using a cylindrical dremel bit, for all 3 XVs. Replaced the black screws with chrome or stainless on the XV432. This helped the output substantially. XV144 - the supplied crystal is out of range, and Elecraft will be replacing. Turns out they started using same one for XV144 and the internal K144XV. But XV144 will be more than 10KHz off, so you can't correct for it. I added a small series variable inductor between xtal and ground, and this helped me get it within 5KHz. You can't bend these crystals very far. XV222 - I removed L19, jumpered it out, and replaced C12 with a variable capacitor. Schematic says 12pF, assembly guide 18pF, and a variable let me get the frequency within a few hertz. XV432 - drilled a couple holes near U6 and jumpered top to bottom. There just arent enough vias on this board. Replaced my U6. Output now pretty stable. I still think PA Bias instructions in alignment are wrong for this unit. Fan wires would not go through the big via, so I soldered it at the diode on the top of the board. 73 VE3MSC Colin __ 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] Re： Solved - XV144, XV222, XV432
Hi Colin, These issues will all be addressed in our transverter kit, PCBs, and documentation as required. Sorry for the inconvenience. 73, Wayne N6KR Thanks to many of you on the list, I have 3 pretty happy transverters. Heat problem - solved by replacing thermal pad between heat spreader and case. Use Thermalcote heatsink grease instead. Scraped paint off the case under screw heads, using a cylindrical dremel bit, for all 3 XVs. Replaced the black screws with chrome or stainless on the XV432. This helped the output substantially. XV144 - the supplied crystal is out of range, and Elecraft will be replacing. Turns out they started using same one for XV144 and the internal K144XV. But XV144 will be more than 10KHz off, so you can't correct for it. I added a small series variable inductor between xtal and ground, and this helped me get it within 5KHz. You can't bend these crystals very far. XV222 - I removed L19, jumpered it out, and replaced C12 with a variable capacitor. Schematic says 12pF, assembly guide 18pF, and a variable let me get the frequency within a few hertz. XV432 - drilled a couple holes near U6 and jumpered top to bottom. There just arent enough vias on this board. Replaced my U6. Output now pretty stable. I still think PA Bias instructions in alignment are wrong for this unit. Fan wires would not go through the big via, so I soldered it at the diode on the top of the board. 73 VE3MSC Colin __ 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] P3 in TX consideration/suggestions ... maybe stupid
Hi Giorgio It would also be nice if you could define makers A and B to indicate signal level on the screen. If you then could indicate the difference between marker A and B this also help. It would also be nice if marker A and B could be set as peak reading markers. Peak or level markers in all forms are most welcome. Maybe even the ability to tune marker A or B to any peak and read the value on the screen. If the P3 is going to be used for TX measurement levels the ability to define a TX mask would also be a nice feature. If you are going to monitor your signal on the air a TX menu screen with a reduced span down to say 20 or 40 khz, peak markers every 5khz would be nice. This feature would give you the peak level of your TX IMD at these points. This would be a good way of ensuring a clean signal. This TXTEST feature in Linrad is superb for this application. I suppose good wine takes time! The are many SDR receivers that have been on the market for years now, even these dont have these features yet. Many of the designers and users of these products dont appreciate the value of these products as spectrum analyzers and measuring tools. 73 John --- On Sat, 1/15/11, ik1bxn igio...@alice.it wrote: From: ik1bxn igio...@alice.it Subject: [Elecraft] P3 in TX consideration/suggestions ... maybe stupid To: elecraft@mailman.qth.net Date: Saturday, January 15, 2011, 12:24 PM Hi guys ! I noticed P3 is out of game at tx time, in rx it is simply wonderful. I wonder if it should be possible/useful/intelligent to display at it during tx time info such as : RF power SWR value ALC value in big fonts in order to read values at a glance Wonderful ,in my opinion, it should be to have at it in future a digital vector wattmeter (maybe it's already in plan) What do you feel ? Is this a stupid and void proposal or not ? Thanks everybody for reading, 73 de Giorgio -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-in-TX-consideration-suggestions-maybe-stupid-tp5925385p5925385.html Sent from the Elecraft 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] K2 SSB Receive issue
I used my K3 to transmit a USB/LSB on all bands except for 10m. The only two bands that I could receive a readable SSB signal was on 20m and 17m. I tried USB and LSB on all other bands and could not receive a readable signal. I used my S-Meter to adjust the frequency on the signal in which I did not have a readable signal and the peak of the signal on the K2 was about 2.2 khz below the indicated frequency on the K3. I adjusted and verified the K2 is on frequency using WWV prior to performing this test so I know both the K2 and K3 are on frequency. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925735.html Sent from the [K2] 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] Elecraft CW Net Announcement
Good Evening, I am unsure whether it is winter now. The rain is so heavy the roads are getting very rutted. Down in the valleys the streams are almost overflowing. Where on Monday I had cold and snow I now have a deluge. Internet connectivity has become intermittent due to the heavy fog. Luckily the rain clears it away when falling heavily. From what I can see on the satellite photo I am in a stream which may not end until the end of the month ;) Fortunately rain is no big deal in Oregon; we get plenty of it. It is also nicer than the amount of snow we would be getting if the temperature were just a bit lower. Propagation has been good on twenty meters but forty meters has been less forgiving. In a month, with the return of the sun, I think it will get better. If you live in the far west you may want to check in before the hour on forty meters so the band does not close before you get a chance. I'll try to be on ten minutes early to handle the band before the door closes to the locals and it goes long. Please join us tomorrow afternoon and evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Sunday 2300z (Sunday 3 PM PST) 14050 kHz Monday 0100z (Sunday 5 PM PST) 7045 kHz Stay well, Kevin. KD5ONS - -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ __ 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] [K2] 160 meter module install
I have assembled and installed this module and everything seems to work fine, including the RANT. Is it really advisable to adjust L3 and L4 again given that the receiver has been previously calibrated and adjusted on 80 meters already (both bands share L3 and L4)? Thanks Brian KB1VBF http://home.comcast.net/~b.denley/index.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] [K2] 160 meter module install
Brian, Yes, I would advise it, but do not simply peak for 160 meters because some compromise may have to be made. The way I do it is to first peak the inductors on 80 meter (already done on your K2), then set the K2 to 1850 kHz. Do a TUNE at 1.5 to 2 watts and make a notation of where the L3 and L4 slugs are located before doing any adjustment. Now peak on 160 meters. Look at the position of the slug after finding the peak and set it halfway between the best 80 meter position and the 160 meter position. I have never seen a case where the slug ended up more than 1/4 turn away from the peak setting for 80 meters. 73, Don W3FPR On 1/15/2011 10:34 PM, Brian Denley wrote: I have assembled and installed this module and everything seems to work fine, including the RANT. Is it really advisable to adjust L3 and L4 again given that the receiver has been previously calibrated and adjusted on 80 meters already (both bands share L3 and L4)? Thanks Brian KB1VBF __ 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] FS P3
Hi to all. P3 Serial #546 is up for sale. No issues, latest FW performing great BUT if you could see how much room I have for my station you would surely groan and some gear is arriving very soon to further complicate my day to day operation..:-) Contact off list only please in the interest of saving excessive bandwidth consumption..:-) P3 is located in VK4 land. -- Gary VK4FD - Motorhome Mobile http://www.qsl.net/vk4fd/ K3 #679, P3 #546 For everything else there's Mastercard!!! __ 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] [K2] 160 meter module install
Thanks Don. Will do. Brian KB1VBF http://home.comcast.net/~b.denley/index.html - Original Message - From: Don Wilhelm w3...@embarqmail.com To: Brian Denley b.den...@comcast.net Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, January 15, 2011 10:56 PM Subject: Re: [Elecraft] [K2] 160 meter module install Brian, Yes, I would advise it, but do not simply peak for 160 meters because some compromise may have to be made. The way I do it is to first peak the inductors on 80 meter (already done on your K2), then set the K2 to 1850 kHz. Do a TUNE at 1.5 to 2 watts and make a notation of where the L3 and L4 slugs are located before doing any adjustment. Now peak on 160 meters. Look at the position of the slug after finding the peak and set it halfway between the best 80 meter position and the 160 meter position. I have never seen a case where the slug ended up more than 1/4 turn away from the peak setting for 80 meters. 73, Don W3FPR On 1/15/2011 10:34 PM, Brian Denley wrote: I have assembled and installed this module and everything seems to work fine, including the RANT. Is it really advisable to adjust L3 and L4 again given that the receiver has been previously calibrated and adjusted on 80 meters already (both bands share L3 and L4)? Thanks Brian KB1VBF __ 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] P3 S meter variance
Newly installed P3. Noticed S meter reading on K3 will be 2-3 units higher than that displayed on P3. I've tried lengthening the signal heights, but results are unsatisfactory:-( . Is there another method for bringing the two more in balance? 73 Bill Wade, Ai4PF __ 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] P3 S meter variance
Bill, Alan may provide a better answer, but are you making that comparison on the amplitude of a single signal that is substantially greater than the ambient noise level? If you are comparing the ambient noise level, the s-meter reading on the K3 will vary by bandwidth, and will be lower at narrow bandwidths - because the total noise depends on the bandwidth. For the P3, the bandwidth of each sample is quite narrow, and the noise level will be lower than shown on the K3. The same phenomenon applies to a SSB signal, but to a lesser extent than noise. The K3 is looking at the entire SSB signal where the P3 is looking at smaller slices of the frequency spectrum contained in the signal. Bottom line, compare the two at a CW signal peak and they should agree more closely. It is just the way the math works out. 73, Don W3FPR On 1/15/2011 11:16 PM, bill wade, sr. wrote: Newly installed P3. Noticed S meter reading on K3 will be 2-3 units higher than that displayed on P3. I've tried lengthening the signal heights, but results are unsatisfactory:-( . Is there another method for bringing the two more in balance? 73 Bill Wade, Ai4PF __ 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] K2 SSB Receive issue
Go back to the filter alignment and look at the BFOs for each filter (you may look either at the DAC values or at the frequency). If the settings for LSB are the same as you have for USB, then you have the BFOs set to the wrong sideband. Use 40 meters for this test so there is no confusion about sideband inversion. It would appear that you have the BFOs for USB correct, but not for LSB. The LSB DAC values (and the as a result the frequency) must be lower than those for USB. The dispaly in Spectrogram will look similar whether it is LSB or USB, so if you were not conscious of the frequency (or DAC value) during the process it is easy to set it to the wrong sideband - it looks right, but it is not. If you look at the frequency of the BFO used for OP1 as FL1, LSB will be near 4913.5x and USB will be near 4916.5x. That could also explain the frequency discrepancy when looking for the frequency of a signal peak. 73, Don W3FPR On 1/15/2011 7:33 PM, KA1YMX wrote: I used my K3 to transmit a USB/LSB on all bands except for 10m. The only two bands that I could receive a readable SSB signal was on 20m and 17m. I tried USB and LSB on all other bands and could not receive a readable signal. I used my S-Meter to adjust the frequency on the signal in which I did not have a readable signal and the peak of the signal on the K2 was about 2.2 khz below the indicated frequency on the K3. I adjusted and verified the K2 is on frequency using WWV prior to performing this test so I know both the K2 and K3 are on frequency. __ 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] P3 S meter variance
What s/n is the K3 in question? Generally, I have the same issue here. The K3 s-meter reads high compared to the P3. BTW, there is an s-meter calibration procedure given in the K3 owner's manual matt W6NIA K3 s/n 24 -- On Sat, 15 Jan 2011 23:16:57 -0500, you wrote: Newly installed P3. Noticed S meter reading on K3 will be 2-3 units higher than that displayed on P3. I've tried lengthening the signal heights, but results are unsatisfactory:-( . Is there another method for bringing the two more in balance? 73 Bill Wade, Ai4PF __ 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] P3 S meter variance
There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL On Sat, 2011-01-15 at 23:16 -0500, bill wade, sr. wrote: Newly installed P3. Noticed S meter reading on K3 will be 2-3 units higher than that displayed on P3. I've tried lengthening the signal heights, but results are unsatisfactory:-( . Is there another method for bringing the two more in balance? 73 Bill Wade, Ai4PF __ 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] P3 S meter variance
Al, Yes, this does work and even the SSB sigs match very closely to the K3 S-Meter. Regards, Gary On Sun, Jan 16, 2011 at 3:20 PM, Alan Bloom a...@elecraft.com wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL On Sat, 2011-01-15 at 23:16 -0500, bill wade, sr. wrote: Newly installed P3. Noticed S meter reading on K3 will be 2-3 units higher than that displayed on P3. I've tried lengthening the signal heights, but results are unsatisfactory:-( . Is there another method for bringing the two more in balance? 73 Bill Wade, Ai4PF __ 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 -- Gary VK4FD - Motorhome Mobile http://www.qsl.net/vk4fd/ K3 #679, P3 #546 For everything else there's Mastercard!!! __ 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] P3 S meter variance
Alan, I might add about the K3 CONFIG: SMTR MD = ABS, that the calibration procedure indicated in the manual may (or may not) be the proper thing to do. The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. I prefer to do the calibration with the S-meter off, and then the response in SMTR ABS is more what I would expect. Since everyone's expectations do not necessarily match mine (obviously, I disagree with Wayne on this item), you can take your pick - do it the way the manual says, or do it like I have. The choice is entirely yours. Like all things S-meter reading related, there is a great variation between receivers, The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, and many transceivers do it differently, but with the K3, you do have a choice depending on how you want to set it up. If you cannot decide how you want it, go with the manual instructions - they work and work quite well. If you deviate, know why you are doing that deviation and know it is for your own situation, others may or may not make the same choices. 73, Don W3FPR On 1/16/2011 12:20 AM, Alan Bloom wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL __ 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] K2 s/n7006 is now a K2/100
KPA100 is done, and everything checked out. I made a couple of contacts on 40m SSB. It was nice to see that power meter needle swing up towards 100W as I was talking. Thanks again to Richard AD7FZ @ Elecraft for getting the replacement parts I needed. 73, David AJ4TF __ 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] P3 S meter variance
Don, The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. Interesting. I assumed that in ABS mode it didn't matter if the preamp was on or not. I sheepishly admit I have never bothered to calibrate my K3 S meter. No excuse - I have an HP8656B signal generator sitting right next to the K3 - I just never got around to it. I'd do it right now but it's time to go to bed. :=) The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, Actually IARU Region 1 has published Technical Recommendation R.1 which specifies S9 = -73 dBm (50 uV into 50 ohms) and 6 dB per S-unit. http://en.wikipedia.org/wiki/S_meter#IARU_Region_1_Technical_Recommendation_R.1 But you're right, that recommendation is more honored in the breach than the observance. (Gosh, quoting Shakespeare on the reflector - what are we coming to? :=) Alan N1AL On Sun, 2011-01-16 at 00:43 -0500, Don Wilhelm wrote: Alan, I might add about the K3 CONFIG: SMTR MD = ABS, that the calibration procedure indicated in the manual may (or may not) be the proper thing to do. The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. I prefer to do the calibration with the S-meter off, and then the response in SMTR ABS is more what I would expect. Since everyone's expectations do not necessarily match mine (obviously, I disagree with Wayne on this item), you can take your pick - do it the way the manual says, or do it like I have. The choice is entirely yours. Like all things S-meter reading related, there is a great variation between receivers, The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, and many transceivers do it differently, but with the K3, you do have a choice depending on how you want to set it up. If you cannot decide how you want it, go with the manual instructions - they work and work quite well. If you deviate, know why you are doing that deviation and know it is for your own situation, others may or may not make the same choices. 73, Don W3FPR On 1/16/2011 12:20 AM, Alan Bloom wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL __ 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] P3 S meter variance
I have a service monitor, I could calibrate my S-meter if I really understood the process, but haven't since I don't. For my part, it was Greek to me. Youknowwho 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org On 1/15/2011 10:20 PM, Alan Bloom wrote: Actually IARU Region 1 has published Technical Recommendation R.1 which specifies S9 = -73 dBm (50 uV into 50 ohms) and 6 dB per S-unit. http://en.wikipedia.org/wiki/S_meter#IARU_Region_1_Technical_Recommendation_R.1 But you're right, that recommendation is more honored in the breach than the observance. (Gosh, quoting Shakespeare on the reflector - what are we coming to? :=) __ 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] P3 S meter variance
I just re-read my manual (rev D7), and it says on pg 51 for s-meter cal if SMTR MD = NOR, set PREAMP ON. If SMTR MD = ABS, set PREAMP OFF. ...bc nr4c -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Sunday, January 16, 2011 12:43 AM To: a...@elecraft.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] P3 S meter variance Alan, I might add about the K3 CONFIG: SMTR MD = ABS, that the calibration procedure indicated in the manual may (or may not) be the proper thing to do. The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. I prefer to do the calibration with the S-meter off, and then the response in SMTR ABS is more what I would expect. Since everyone's expectations do not necessarily match mine (obviously, I disagree with Wayne on this item), you can take your pick - do it the way the manual says, or do it like I have. The choice is entirely yours. Like all things S-meter reading related, there is a great variation between receivers, The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, and many transceivers do it differently, but with the K3, you do have a choice depending on how you want to set it up. If you cannot decide how you want it, go with the manual instructions - they work and work quite well. If you deviate, know why you are doing that deviation and know it is for your own situation, others may or may not make the same choices. 73, Don W3FPR On 1/16/2011 12:20 AM, Alan Bloom wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL __ 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] P3 S meter variance
Bill, I missed that recent update. It was not that way previously. We have to keep up with the latest developments (and I failed). Wayne and I had some discussion about this a while back, and I was not certain of the outcome - Apparently we now agree. 73, Don W3FPR On 1/16/2011 1:46 AM, Bill Conkling wrote: I just re-read my manual (rev D7), and it says on pg 51 for s-meter cal if SMTR MD = NOR, set PREAMP ON. If SMTR MD = ABS, set PREAMP OFF. ...bc nr4c -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Sunday, January 16, 2011 12:43 AM To: a...@elecraft.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] P3 S meter variance Alan, I might add about the K3 CONFIG: SMTR MD = ABS, that the calibration procedure indicated in the manual may (or may not) be the proper thing to do. The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. I prefer to do the calibration with the S-meter off, and then the response in SMTR ABS is more what I would expect. Since everyone's expectations do not necessarily match mine (obviously, I disagree with Wayne on this item), you can take your pick - do it the way the manual says, or do it like I have. The choice is entirely yours. Like all things S-meter reading related, there is a great variation between receivers, The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, and many transceivers do it differently, but with the K3, you do have a choice depending on how you want to set it up. If you cannot decide how you want it, go with the manual instructions - they work and work quite well. If you deviate, know why you are doing that deviation and know it is for your own situation, others may or may not make the same choices. 73, Don W3FPR On 1/16/2011 12:20 AM, Alan Bloom wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL __ 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] P3 S meter variance
Alan, WARNING - I am leading this thread Off-Topic. Delete immediately if you object,- some parts are personal. Quoting Shakespeare on the reflector may be as good or better than some of the other OT posts that have appeared here in the past (no specific examples cited nor intended). I just might add a few of my favorite Mike Cross (and Tom Paxton) quotes to the melay in due time! (OK, you can Google if you are not familiar with those artists). The humor and sentimentality of Mike Cross's songwriting helped me stay grounded through 3 bouts with cancer - he gave me hope and a new perspective on life, and I thouroughly enjoy the political satire that Tom Paxton has provided me with both a laugh at politics and a deep sorrow at the beauracracy that has developed. From Mike Cross (who does not have an apparent active political agenda -- the serious side is embodied in songs like Red Tailed Hawk, while the funny side is characterized by Elma Turl,or Granny's Milk Cartons. Tom Paxton does have a political agenda, but has composed and performed music ranging from Ramblin' Boy to Lyndon Johnson told the Nation (use Google). Yes, this is stuff from the 1960s and the 1970s, and some is anti-war., but the time of Lyndon Johnson and Vietnam are past, so just enjoy the music and forget the politics that made that music so close to home. 73, Don W3FPR .1/16/2011 1:20 AM, Alan Bloom wrote: Don, The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. Interesting. I assumed that in ABS mode it didn't matter if the preamp was on or not. I sheepishly admit I have never bothered to calibrate my K3 S meter. No excuse - I have an HP8656B signal generator sitting right next to the K3 - I just never got around to it. I'd do it right now but it's time to go to bed. :=) The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, Actually IARU Region 1 has published Technical Recommendation R.1 which specifies S9 = -73 dBm (50 uV into 50 ohms) and 6 dB per S-unit. http://en.wikipedia.org/wiki/S_meter#IARU_Region_1_Technical_Recommendation_R.1 But you're right, that recommendation is more honored in the breach than the observance. (Gosh, quoting Shakespeare on the reflector - what are we coming to? :=) Alan N1AL On Sun, 2011-01-16 at 00:43 -0500, Don Wilhelm wrote: Alan, I might add about the K3 CONFIG: SMTR MD = ABS, that the calibration procedure indicated in the manual may (or may not) be the proper thing to do. The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. I prefer to do the calibration with the S-meter off, and then the response in SMTR ABS is more what I would expect. Since everyone's expectations do not necessarily match mine (obviously, I disagree with Wayne on this item), you can take your pick - do it the way the manual says, or do it like I have. The choice is entirely yours. Like all things S-meter reading related, there is a great variation between receivers, The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, and many transceivers do it differently, but with the K3, you do have a choice depending on how you want to set it up. If you cannot decide how you want it, go with the manual instructions - they work and work quite well. If you deviate, know why you are doing that deviation and know it is for your own situation, others may or may not make the same choices. 73, Don W3FPR On 1/16/2011 12:20 AM, Alan Bloom wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL __ 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] P3 S meter variance
I have quoted Shakespeare in my ECN notes as well as other authors. Many times an apt quote can say what we cannot say. Or, more often, say it much better than we ever could. Kevin. KD5ONS On Sat, 15 Jan 2011 23:32:58 -0800, Don Wilhelm w3...@embarqmail.com wrote: Alan, WARNING - I am leading this thread Off-Topic. Delete immediately if you object,- some parts are personal. Quoting Shakespeare on the reflector may be as good or better than some of the other OT posts that have appeared here in the past (no specific examples cited nor intended). I just might add a few of my favorite Mike Cross (and Tom Paxton) quotes to the melay in due time! (OK, you can Google if you are not familiar with those artists). The humor and sentimentality of Mike Cross's songwriting helped me stay grounded through 3 bouts with cancer - he gave me hope and a new perspective on life, and I thouroughly enjoy the political satire that Tom Paxton has provided me with both a laugh at politics and a deep sorrow at the beauracracy that has developed. From Mike Cross (who does not have an apparent active political agenda -- the serious side is embodied in songs like Red Tailed Hawk, while the funny side is characterized by Elma Turl,or Granny's Milk Cartons. Tom Paxton does have a political agenda, but has composed and performed music ranging from Ramblin' Boy to Lyndon Johnson told the Nation (use Google). Yes, this is stuff from the 1960s and the 1970s, and some is anti-war., but the time of Lyndon Johnson and Vietnam are past, so just enjoy the music and forget the politics that made that music so close to home. 73, Don W3FPR .1/16/2011 1:20 AM, Alan Bloom wrote: Don, The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. Interesting. I assumed that in ABS mode it didn't matter if the preamp was on or not. I sheepishly admit I have never bothered to calibrate my K3 S meter. No excuse - I have an HP8656B signal generator sitting right next to the K3 - I just never got around to it. I'd do it right now but it's time to go to bed. :=) The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, Actually IARU Region 1 has published Technical Recommendation R.1 which specifies S9 = -73 dBm (50 uV into 50 ohms) and 6 dB per S-unit. http://en.wikipedia.org/wiki/S_meter#IARU_Region_1_Technical_Recommendation_R.1 But you're right, that recommendation is more honored in the breach than the observance. (Gosh, quoting Shakespeare on the reflector - what are we coming to? :=) Alan N1AL On Sun, 2011-01-16 at 00:43 -0500, Don Wilhelm wrote: Alan, I might add about the K3 CONFIG: SMTR MD = ABS, that the calibration procedure indicated in the manual may (or may not) be the proper thing to do. The manual suggests that you calibrate the S-meter with the preamp ON. If you do that, and set the S-meter to ABS, you will find that the S-meter response is about 2 S-units lower than what you may expect. I prefer to do the calibration with the S-meter off, and then the response in SMTR ABS is more what I would expect. Since everyone's expectations do not necessarily match mine (obviously, I disagree with Wayne on this item), you can take your pick - do it the way the manual says, or do it like I have. The choice is entirely yours. Like all things S-meter reading related, there is a great variation between receivers, The K3 has re-vitalized the old Collins 50 uV equal S-9 standard. That standard is not a standard at all, and many transceivers do it differently, but with the K3, you do have a choice depending on how you want to set it up. If you cannot decide how you want it, go with the manual instructions - they work and work quite well. If you deviate, know why you are doing that deviation and know it is for your own situation, others may or may not make the same choices. 73, Don W3FPR On 1/16/2011 12:20 AM, Alan Bloom wrote: There are a couple reasons why the K3's S meter and the P3 display may show a different level. As Don mentioned, the P3 will generally show a much lower level than the K3 on noise. It's because the effective bandwidth of the P3 is generally only one display pixel, about 1/450 of the span. Less bandwidth means less noise power in each display point. The same thing happens to some extent with an SSB signal. Another issue is that the S meter reading on the K3 may change when you turn the preamp or attenuator on or off. To prevent that happening, set CONFIG:SMTR MD to ABS. If you do that and calibrate both the K3 S meter and the P3 amplitude, then the two should closely agree when measuring a steady CW carrier. Alan N1AL
