[Elecraft] SW Tone; no beep
Hello all, Today I installed the sub-receiver (and second DSP board) and replaced the faulty power pole connector on the RF board (thank you Dale, for the part). It's all working great, except: I am not getting confirmation or warning tones anymore. It doesn't matter if SW Tone is on or off, I get no beeps. So far that's the only problem I've had with the K3, P3 and KPA500 combo. I reloaded ALL the firmware, powered down several times; it's still not beeping now. Any help? Thanks in advance, Rick WA6NHC #5882 __ 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] RTTY Diddle suppression
Anyone, In the K3 utility, how do you insert the control character IM using the computer keyboard when editing a RTTY memory? I'm trying to cut short the long idle tail so the DX stations don't double with me when answering my responses. I tried entering IM and cntl-T. Neither works. Only sending IM on the paddles in real time seems to work. Thanks, Dan WA6PZK __ 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] RTTY Diddle Suppression
Use the vertical line character ie. | on the keyboard at end of the message. This will be read as IM and stop the diddle. Bill __ 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] RTTY Diddle Suppression
That would be the shifted (upper case) backslash key, usually just above the return key on most keyboards. 73 de Ray K2ULR On Oct 23, 2011, at 4:26 AM, Bill McDowell wrote: Use the vertical line character ie. | on the keyboard at end of the message. This will be read as IM and stop the diddle. Bill __ 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/KPA500 with a MFJ-994B AUTO TUNER
I currently have a K3/KPA500/MFJ998 set-up. I used a MFJ-994B with an ALS-600 for several years. A couple of years ago I upgraded to a MFJ-998 as it has a built-in amp-disable feature when tuning. I do like these autotuners and I have reviews of both in the Product Review section of my website at www.ad5x.com. To me, the disadvantage of the MFJ tuners is that they do not work on 6-meters and the bypassed SWR of the tuners is high on 6-meters. Therfore you must completely physically bypass the MFJ tuners when operating on 6-meters (I do this with antenna switches). Phil - AD5X __ 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] Very OT:Rugby World Cup 2011 Final
Great game. Very tense. Only one point in it. At one stage I shouted at the TV. Remember the Rainbow Warrior. Big celebrations in NZ having just won the World Cup by defeating France. Yes, Eden Park is in Auckland. The World Cup series was to have been played in Christchurch, which unhappily is still closed down after the devastating earthquakes in September of last year and February of this year. About 4000 families have now moved away from Christchurch - school populations are down and the effect will probably mean about 300 teachers being redundant. Still the World Cup win will be a shot in the arm for the whole country. 73 Kevin VK3DAP / ZL2DAP On 23/10/2011 4:15 PM, Wayne Burdick wrote: I've been to NZ and wish I could be there now. Best of luck to both teams. BTW: it's not totally off-topic. Isn't Eden Park (in Auckland, where the game is to be played) presently experiencing a total power outage? Won't those packed pubs need amateur radio to relay beer orders? Wayne N6KR __ 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] Windows XP
Everyone. Someone remarked Windows XP operating system was dead. I have to disagree. Though Windows XP is old it is still one of the most successful operating system that Microsoft came out with and is still supported with up-dates. I run both windows 7-64 and XP and both operating systems perform well. 73 Dave KD1NA __ 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] Very OT:Rugby World Cup 2011 Final
For American readers: redundant means you're out of a job, axed, fired, history, etc. Monty K2DLJ ….. about 300 teachers being redundant. Still the World Cup win will be a shot in the arm for the whole country. 73 Kevin VK3DAP / ZL2DAP __ 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] Update on my progress - Now General RF Issue WAS 160m loop experiment a big failure
First, let me say thank you to everyone on the list who has replied via the list or directly. The help has been fantastic and has increased my general knowledge as well as helping me with the problem. Althought I have pointed to the start of the problem with the installation of the Loop and the install of the propane tank and possible crushed coax, I now believe that I have always had some RF issues but it was brought to my attention by the Loop being real bad and then I was highly sensitive to the whole system. First I had made a significant error in the basic grounding of my shack. This error I will call the green wire mistake. What I had done was add the chassis ground of all my 12v devices and tuner to the green wire ground of the house electrical system. This is in fact a signficant error and has been corrected. What I have learned that there is a difference for a saftey ground for lightening protection and so on and it has nothing to do with an RF ground. So green wire error fixed, long term a total revamp of the system for a safety ground. Second I did a lot of checking of the coax yesterday. Checked it with nothing attached, checked it with a dummy load, used functions of my MFJ 259b that I did not even know existed. Basically the coax checks out fine, but I still have RF. The coax at this point in time is no longer buried, I completely unearthed it. At this point in time I put a choke at the antenna feed up in the air with 31 mix ferrites and no improvement. So if the problem is at the antenna feed this should have fixed it. I remove my lightening arrestor from the system just to check it out no change. So I pull the choke down. Next I put a choke right at the antenna out the same choke that I had put on the antenna feed point. Wow big improvement plus I added more snap on 31 ferrites directly on the coax. So I have a choke in the shack and now I can go full power. So having the choke at the feed into the antenna tuner has a dramatic effect. Now I am thinking ok I will burry the coax again, easy to do in the soft grass plus I want to see if the problem turns on again as I have changed the system with the coax laying on the ground and the outside is dry not directly coupled to the set ground. After the burry RF is bad real bad. So coax is now on laying on the ground again unearthed and the system again functions, points again to bad coax. I am now convenced that this is it so I turn on the shack PC to get some more information and so on. Plus I am talking to some other hams on what I have found. As the PC boots up the RF is back and it is strong. Holy Sxxt Batman, now what. So I ponder this for a moment, since I removed my geen wire error the PC is no longer connected to the K3 than thru the rs232 so I am assuming Pin1 problem. I make a ground wire from the chassis of the PC to the center of the grounding point (grounding star as it is referred to) and fixed. So I take a critical look at the PC installation and the coax runs right next to the PC. So I disconnect everything and move the PC to the other side of the desk to get it as far away from the coax as I can plus this eleminates short jumper cables for the mouse and so on. So other than a brief instant when the PC boots up and it is a very specfic part of the boot cycle there is no RF. So in a nutshell 1) fixed green wire problem 2) unearthed coax and it is laying on the ground on the top of the grass 3) build choke with 31 mix at antenna out on the tuner 4) moved PC I am on the air. To do when the order shows up from UPS. Install new coax, I assume the one I have is not happy anymore and test the system to see if I can remove the choke at the tuner. From my perspective I am on the air, but I do not have a robust installation being on the 2nd floor. I probally can survive this winter this way with the simple antenna shield grounding outside as I did last winter as there is no lightning normally. However, I have to determine the best way to redo the installation and am considering moving the shack to the basement where then it will be signficantly eaiser to have the shack properly grounded for safety and then bonded. Again thanks for the help, as I am on the air but not convinced that I have it fully cured. So there may be more questions in the future when I find stuff starts to not work again. ~73 Don KD8NNU __ 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] Windows XP
It has been a decent version of windows but it's lifetime is limited. In 2014 MS will no longer provide security updates. Doesn't matter how good your A/V and firewall are, most security updates from MS fix vulnerablities in the OS of some sort. Without those patches your XP machine(s) will become more and more vulnerable. You should disconnect it from the net. If MS sticks to pattern the next version of windows, after 7, will be a dog. 98/98SE, pretty good (other than the FAT32 filesystem). Windows ME, a virus. 2000/XP, best windows yet (XP is just a prettied up version of 2K). Vista, especially the 32 bit versions, pathetic. Win 7, what Vista could have been and will push XP as best version yet. Win 8.or whatever they're calling it...who knows. On Sun, 23 Oct 2011 08:22:53 -0400 David Robertson dar...@comcast.net wrote: Everyone. Someone remarked Windows XP operating system was dead. I have to disagree. Though Windows XP is old it is still one of the most successful operating system that Microsoft came out with and is still supported with up-dates. I run both windows 7-64 and XP and both operating systems perform well. 73 Dave KD1NA -- R. Kevin Stover AC0H __ 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] XV-144 appears to have gone deaf
Dear Gang: After a normal night of EME last night, tonight while warming everything up I noticed a sudden drop of rx signal of about 10db on the WSJT waterfall. I got the WSJT level set correctly again by increasing LIN OUT to the computer. Here's where it gets wierd: 1) I can still receive the very loud signals of locals. 2) When I hook up the XG3 to the antenna connector, I get an S8 signal indication on the K3 at -33dbm, an S1 signal at -73 dbm, and nothing at -107dbm. 3) Disconnecting the antenna completely has no effect on the noise level displayed on WSJT or the P3, but the loud local signals drop out. Not normal. 4) Turning the external preamp on and off has no effect on noise level either. Preamp confirmed good. Bypassing it physically has no effect. Not normal. 5) TX works normally. SWR is normal. All measurements made in CW mode with AGC OFF. Could I have had a partial failure of the XV-144 in rx mode without a total failure? Or am I missing something due to sleep deprivation? Thanks for any help. 73 Eric WD6DBM __ 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] Update on my progress - Now General RF Issue WAS 160m loop experiment a big failure
Thanks Don, and all who contributed to help him. Yours has been an interesting story and it was educational to watch it unfold here. I bet the CQ or QST would eat up a story like that if it was well documented and turned out as well as yours. Regards, Ken Alexander VE3HLS On 23/10/2011 9:13 AM, gold...@charter.net wrote: First, let me say thank you to everyone on the list who has replied via the list or directly. The help has been fantastic and has increased my general knowledge as well as helping me with the problem. Althought I have pointed to the start of the problem with the installation of the Loop and the install of the propane tank and possible crushed coax, I now believe that I have always had some RF issues but it was brought to my attention by the Loop being real bad and then I was highly sensitive to the whole system. First I had made a significant error in the basic grounding of my shack. This error I will call the green wire mistake. What I had done was add the chassis ground of all my 12v devices and tuner to the green wire ground of the house electrical system. This is in fact a signficant error and has been corrected. What I have learned that there is a difference for a saftey ground for lightening protection and so on and it has nothing to do with an RF ground. So green wire error fixed, long term a total revamp of the system for a safety ground. Second I did a lot of checking of the coax yesterday. Checked it with nothing attached, checked it with a dummy load, used functions of my MFJ 259b that I did not even know existed. Basically the coax checks out fine, but I still have RF. The coax at this point in time is no longer buried, I completely unearthed it. At this point in time I put a choke at the antenna feed up in the air with 31 mix ferrites and no improvement. So if the problem is at the antenna feed this should have fixed it. I remove my lightening arrestor from the system just to check it out no change. So I pull the choke down. Next I put a choke right at the antenna out the same choke that I had put on the antenna feed point. Wow big improvement plus I added more snap on 31 ferrites directly on the coax. So I have a choke in the shack and now I can go full power. So having the choke at the feed into the antenna tuner has a dramatic effect. Now I am thinking ok I will burry the coax again, easy to do in the soft grass plus I want to see if the problem turns on again as I have changed the system with the coax laying on the ground and the outside is dry not directly coupled to the set ground. After the burry RF is bad real bad. So coax is now on laying on the ground again unearthed and the system again functions, points again to bad coax. I am now convenced that this is it so I turn on the shack PC to get some more information and so on. Plus I am talking to some other hams on what I have found. As the PC boots up the RF is back and it is strong. Holy Sxxt Batman, now what. So I ponder this for a moment, since I removed my geen wire error the PC is no longer connected to the K3 than thru the rs232 so I am assuming Pin1 problem. I make a ground wire from the chassis of the PC to the center of the grounding point (grounding star as it is referred to) and fixed. So I take a critical look at the PC installation and the coax runs right next to the PC. So I disconnect everything and move the PC to the other side of the desk to get it as far away from the coax as I can plus this eleminates short jumper cables for the mouse and so on. So other than a brief instant when the PC boots up and it is a very specfic part of the boot cycle there is no RF. So in a nutshell 1) fixed green wire problem 2) unearthed coax and it is laying on the ground on the top of the grass 3) build choke with 31 mix at antenna out on the tuner 4) moved PC I am on the air. To do when the order shows up from UPS. Install new coax, I assume the one I have is not happy anymore and test the system to see if I can remove the choke at the tuner. From my perspective I am on the air, but I do not have a robust installation being on the 2nd floor. I probally can survive this winter this way with the simple antenna shield grounding outside as I did last winter as there is no lightning normally. However, I have to determine the best way to redo the installation and am considering moving the shack to the basement where then it will be signficantly eaiser to have the shack properly grounded for safety and then bonded. Again thanks for the help, as I am on the air but not convinced that I have it fully cured. So there may be more questions in the future when I find stuff starts to not work again. ~73 Don KD8NNU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:
Re: [Elecraft] Update on my progress - Now General RF Issue
Don, Your green wire mistake was not a mistake at all. Everything in the shack should have its chassis bonded together - by a connection to a single point ground - that includes computers, power supplies, and yes, the chassis of your 12 volt equipment too. That single point ground should be bonded to the green wire ground too. If you have a heavy wire to an earth driven ground rod from that single point ground, all the better, BUT that driven ground rod must be also connected to the Utility Entrance Ground - preferably by a wire outside the house. See the Safety chapter in a 2010 or newer ARRL Handbook for more information. You should not rely entirely on the internal green wire at your shack receptacles - it wanders about in your house wiring, and the only requirement for AC safety is that it be all connected together - and it sometimes fails. An annual check with one of the inexpensive testers is a good thing. You are quite correct that the above grounding schemes are for safety ground and for protection from surges from nearby lightning. To survive a direct strike, something much more extensive is required. Those grounds are in no way an RF ground point and are not intended to be. Other means will be required to establish an RF ground (actually a low impedance point for RF). One way to establish that low impedance point for RF in a 2nd floor environment with 1/4 wave wires for all bands that you intend to operate, and it may be the only practical way if you cannot keep common mode RF off your antenna feedlines. 73, Don W3FPR On 10/23/2011 9:13 AM, gold...@charter.net wrote: First I had made a significant error in the basic grounding of my shack. This error I will call the green wire mistake. What I had done was add the chassis ground of all my 12v devices and tuner to the green wire ground of the house electrical system. This is in fact a signficant error and has been corrected. What I have learned that there is a difference for a saftey ground for lightening protection and so on and it has nothing to do with an RF ground. So green wire error fixed, long term a total revamp of the system for a safety ground. __ 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] Update on my progress - Now General RF Issue WAS 160m loop experiment a big failure
Don wrote: ...] 1) fixed green wire problem 2) unearthed coax and it is laying on the ground on the top of the grass 3) build choke with 31 mix at antenna out on the tuner 4) moved PC I am on the air. To do when the order shows up from UPS. Install new coax, I assume the one I have is not happy anymore and test the system to see if I can remove the choke at the tuner. From my perspective I am on the air, but I do not have a robust installation being on the 2nd floor. I probally can survive this winter this way with the simple antenna shield grounding outside as I did last winter as there is no lightning normally. However, I have to determine the best way to redo the installation and am considering moving the shack to the basement where then it will be signficantly eaiser to have the shack properly grounded for safety and then bonded. Again thanks for the help, as I am on the air but not convinced that I have it fully cured. So there may be more questions in the future when I find stuff starts to not work again. Well done - you made some real progress. While you're waiting for the brown van, how about building a simple clamp-on RF current meter? It is the most useful tool for this kind of RFI investigation, because it lets you *see* where the stray currents are. Once you've tried one, you'll wonder how you ever managed without it. The simplest 'Mousetrap' version only takes a half-hour to build: http://www.ifwtech.co.uk/g3sek/clamp-on/clamp-on.htm In a review of commercial meters for 'Radcom' (RSGB), the MFJ-854 performed well but I found the MFJ-805 very poor: www.ifwtech.co.uk/g3sek/clamp-on/mfj-reviews.pdf -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __ 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] Update on my progress - Now General RF Issue WAS 160m loop experiment a big failure
I have been watching this thread out of the corner of my eye, but not reading it real close. This post caught my attention. I'm thinking you may actually have a break in the shield at a connector point on the coax. That would cause heavy RF on the coax shield coming back at the shack, and would STILL accept power from your transmitter. Putting the coax on the ground may relieve stress on the joint and allow the shield to make contact again. Sometimes folks forget to solder the shield to PL259 as just one way this can happen, or the shield internally isn't trimmed right for the connector, etc, etc, ad naseum. Another way that kind of break can happen is a lightning strike that evaporated the connection at the connector, or at a strike point. But to my mind, anyway, the coax shield and/or connections are completely suspect for shield continuity. What you have described are what would cause me to completely replace the coax and connectors. We spend so much money on rigs and amps and then go cheep cheap on feedline and connectors. Consider small hardline and connectors made for that hardline, and some kinds of troubles will just go away. 73, Guy. On Sun, Oct 23, 2011 at 9:13 AM, gold...@charter.net wrote: First, let me say thank you to everyone on the list who has replied via the list or directly. The help has been fantastic and has increased my general knowledge as well as helping me with the problem. Althought I have pointed to the start of the problem with the installation of the Loop and the install of the propane tank and possible crushed coax, I now believe that I have always had some RF issues but it was brought to my attention by the Loop being real bad and then I was highly sensitive to the whole system. First I had made a significant error in the basic grounding of my shack. This error I will call the green wire mistake. What I had done was add the chassis ground of all my 12v devices and tuner to the green wire ground of the house electrical system. This is in fact a signficant error and has been corrected. What I have learned that there is a difference for a saftey ground for lightening protection and so on and it has nothing to do with an RF ground. So green wire error fixed, long term a total revamp of the system for a safety ground. Second I did a lot of checking of the coax yesterday. Checked it with nothing attached, checked it with a dummy load, used functions of my MFJ 259b that I did not even know existed. Basically the coax checks out fine, but I still have RF. The coax at this point in time is no longer buried, I completely unearthed it. At this point in time I put a choke at the antenna feed up in the air with 31 mix ferrites and no improvement. So if the problem is at the antenna feed this should have fixed it. I remove my lightening arrestor from the system just to check it out no change. So I pull the choke down. Next I put a choke right at the antenna out the same choke that I had put on the antenna feed point. Wow big improvement plus I added more snap on 31 ferrites directly on the coax. So I have a choke in the shack and now I can go full power. So having the choke at the feed into the antenna tuner has a dramatic effect. Now I am thinking ok I will burry the coax again, easy to do in the soft grass plus I want to see if the problem turns on again as I have changed the system with the coax laying on the ground and the outside is dry not directly coupled to the set ground. After the burry RF is bad real bad. So coax is now on laying on the ground again unearthed and the system again functions, points again to bad coax. I am now convenced that this is it so I turn on the shack PC to get some more information and so on. Plus I am talking to some other hams on what I have found. As the PC boots up the RF is back and it is strong. Holy Sxxt Batman, now what. So I ponder this for a moment, since I removed my geen wire error the PC is no longer connected to the K3 than thru the rs232 so I am assuming Pin1 problem. I make a ground wire from the chassis of the PC to the center of the grounding point (grounding star as it is referred to) and fixed. So I take a critical look at the PC installation and the coax runs right next to the PC. So I disconnect everything and move the PC to the other side of the desk to get it as far away from the coax as I can plus this eleminates short jumper cables for the mouse and so on. So other than a brief instant when the PC boots up and it is a very specfic part of the boot cycle there is no RF. So in a nutshell 1) fixed green wire problem 2) unearthed coax and it is laying on the ground on the top of the grass 3) build choke with 31 mix at antenna out on the tuner 4) moved PC I am on the air. To do when the order shows up from UPS. Install new coax, I assume the one I have is not happy anymore and test the system to see if I can remove the choke
Re: [Elecraft] RTTY Diddle suppression
John, I'll try that. I could not find that in the manual or help utility on the K3 utility. My eyesight not as good as it used to be. Thanks, WA6PZK On 10/23/11 1:36 AM, John Chappell G3XRJ j...@g3xrj.com wrote: At the end of you message just insert a | - vertical bar ( shift+\ on UK keyboard ) John G3XRJ Anyone, In the K3 utility, how do you insert the control character IM using the computer keyboard when editing a RTTY memory? I'm trying to cut short the long idle tail so the DX stations don't double with me when answering my responses. I tried entering IM and cntl-T. Neither works. Only sending IM on the paddles in real time seems to work. Thanks, Dan WA6PZK __ 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] Update on my progress - Now General RF Issue
On Sun, Oct 23, 2011 at 9:10 AM, Don Wilhelm w3...@embarqmail.com wrote: ...One way to establish that low impedance point for RF in a 2nd floor environment with 1/4 wave wires for all bands that you intend to operate, and it may be the only practical way if you cannot keep common mode RF off your antenna feedlines... === This is spot on. If you can get a good counterpoise scheme worked out, there's no need to move the shack downstairs. Your symptoms indicate that the trouble is stemming from common mode currents on the outside of your coax. Once these are cured, there may be no need to hang ferrites on the connecting wires in the shack. It sounds as if you're on the right track, but you can do more to choke off the common mode currents and divert them so they won't travel on the coax. 73, Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 __ 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/KPA500 with a MFJ-994B AUTO TUNER
de KF1C Running K3 w/ ALS-600 Mfj-994B in a plastic box at base of 43ft vertical / and 99 ft inverted L. Fed against 2 above ground radials 135 ft long and 2 65 ft long. (also 5 or 6 60 ft buried) Inside the shack 100 ft of coax make not much differance on these readings, I spent allot of time back and forth. I have line isolators in line (both coax and ferrite ) so I know its not rf on the shield causing the trips. 994B loses lock and trips the amp above the following readings. The 994B does not have a wide matching range like the 998 if you read the specs. I am waiting for the KAT-500 to come out. 43 ft vertical 994B handles 500 watts 10m 12m 15m 17m 20m 994B handles 200 watts 30m and 40m 994B handles50 watts on 80m Inverted L 99 ft 994B handles 500 watts 10m 12m 15m 17m 20m 40m 994B handles 75 watts 80m and 160m Both Inverted L and 43ft vertical connected. 994B handles 500 watts 10m 12m 15m 17m 20m 40m 994B handles 200 watts 80m and 160m I'm going to extend the L to quarter wave on 160m soon, that should (hopefully) allow full power on 80m __ 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] KX3 vs FT817 - how do the inside dimensions compare?
After almost 50 years of being a ham, I see that the conventional wisdom of NOT including general coverage in a receiver has been refuted. It was thought to be at the expense of performance on the ham bands. How have modern design techniques overcome this limitation? 73 de Jim - AD6CW On 10/22/2011 10:11 AM, Wayne Burdick wrote: Hi TR, The KX1 is our smallest radio, with TFR (trail-friendly) format and an attached paddle, like the KX3. It also uses a DDS VFO and SSB/AM receive, providing SWL coverage in addition to the ham bands. 73, Wayne N6KR __ 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] KX3 vs FT817 - how do the inside dimensions compare?
Hi Jim, The K3 comes with very narrow ham-band filters, standard. These provide the excellent SWL rejection that you're referring to, which is especially important in a down-conversion superhet design. To obtain full SWL coverage, the K3 user can install the KBPF3 option, which adds wider filters that cover the entire range of 0.5-30 MHz. This has no impact on ham-band performance, as the wider filters are only switched in when you tune well outside the ham bands. The KX3 has a different receiver architecture, similar to direct conversion but with quadrature channels (I/Q) to allow for single- signal reception. This architecture doesn't involve a large I.F., so there are fewer images to deal with in both RX and TX mode. This lightens the requirements for band-pass filtering. As a result, the KX3's band-pass filters can include ham and nearby SWL bands without any need for tuning. The K1, KX1, and K2 have tuned ham-band filters that provide coverage of most nearby SWL bands. 73, Wayne N6KR On Oct 23, 2011, at 9:58 AM, Jim Lowman wrote: After almost 50 years of being a ham, I see that the conventional wisdom of NOT including general coverage in a receiver has been refuted. It was thought to be at the expense of performance on the ham bands. How have modern design techniques overcome this limitation? 73 de Jim - AD6CW On 10/22/2011 10:11 AM, Wayne Burdick wrote: Hi TR, The KX1 is our smallest radio, with TFR (trail-friendly) format and an attached paddle, like the KX3. It also uses a DDS VFO and SSB/AM receive, providing SWL coverage in addition to the ham bands. 73, Wayne N6KR __ 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] KX3 vs FT817 - how do the inside dimensions compare?
I had the impression that the rise of the Ham-band-only transceiver in the 1950's and 60's was based on simple economics. It was cheaper to drop general coverage receive. It was also true that they were typically better performing than most general coverage receivers, mostly due to improved input filtering that protected the mixer from large off-frequency signals. As you may recall, most general coverage receivers up to that time used simple L/C tunable input filters that required multiple knob-twiddling or a big ganged multi-section tuning cap with the stages carefully adjusted so they tracked the across the tuning range. A well-designed fixed tuned input filter was better, especially important consdering the relatively easy-to-overload mixers in common use back then. That gave the ad writers a good explanation for the limited tuning ranges. Ron AC7AC -Original Message- After almost 50 years of being a ham, I see that the conventional wisdom of NOT including general coverage in a receiver has been refuted. It was thought to be at the expense of performance on the ham bands. How have modern design techniques overcome this limitation? 73 de Jim - AD6CW __ 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] KX3 vs FT817 - how do the insidedimensions compare?
I had the impression that the rise of the Ham-band-only transceiver in the 1950's and 60's was based on simple economics. It was cheaper to drop general coverage receive... Just the opposite, I think. Some of the poorest performing -- and least expensive receivers provided general coverage. The most expensive receivers of their respective eras were the Collins 75A, Collins 75S, Drake R-4, and National HRO, all of which were at the top-end of the purchasing ladder in their day. I have several Hallicrafters receivers between the SX-9 and SX-100 and others in between. The cheap and dirty way of providing GC was to find the calibrating Main tuning cap points, activate the xtal calibrate marker, then tune the bandspread cap to the nearest dial marker. The problem is that mechanical variations in the GC main tuning greatly affect bandspread tuning. For example, on my SX-100, the entire tuning mechanism functions on the use of a highly tensioned steel piano string. The slightest vibration on the table transfers from the chassis, into the gears, the dial string, and ultimately, the tuning caps. Because of tuning instability, the SX-100 is one of the worst receivers I've owned and unfortunately, it was my first receiver as a novice in '72. OTOH, Collins and Drake receivers from the '50s and '60 suffer no such problems. The PTOs are temperature compensated and highly linear from end-to-end. It is possible to use a PTO and a crystal heterodyne scheme at the first LO, but was very expensive. The Drake SPR-4 was such a GC SWBC receiver that had a PTO and up to 23 pre-mixer crystals - and it still didn't offer contiguous coverage to 30 MHz. Going back even further in time, look at the National SW-3, FB-7, and HRO frequency-determining topology. The SW-3 regen and HRO could certainly accommodate GC, but the real performance attained in the 1930s was realized when the bandspread clips were engaged, severely limiting tuning range to only the ham bands. For a non-PTO tuning method, National's HRO gearbox, coil boxes with taps, and elliptical tuning dial were a flash of genius. So, I see the early ham bands only receivers as the more superior, and expensive product. Apart from the mentioned Hallicrafters SX receivers, I don't collect and restore any other type of GC receiver. And, how anyone can elevate the SX-88 to Delivered from God status is well beyond my comprehension! Paul, W9AC - Original Message - From: Ron D'Eau Claire r...@cobi.biz To: Elecraft@mailman.qth.net Sent: Sunday, October 23, 2011 3:12 PM Subject: Re: [Elecraft] KX3 vs FT817 - how do the insidedimensions compare? It was cheaper to drop general coverage receive. It was also true that they were typically better performing than most general coverage receivers, mostly due to improved input filtering that protected the mixer from large off-frequency signals. As you may recall, most general coverage receivers up to that time used simple L/C tunable input filters that required multiple knob-twiddling or a big ganged multi-section tuning cap with the stages carefully adjusted so they tracked the across the tuning range. A well-designed fixed tuned input filter was better, especially important consdering the relatively easy-to-overload mixers in common use back then. That gave the ad writers a good explanation for the limited tuning ranges. Ron AC7AC -Original Message- After almost 50 years of being a ham, I see that the conventional wisdom of NOT including general coverage in a receiver has been refuted. It was thought to be at the expense of performance on the ham bands. How have modern design techniques overcome this limitation? 73 de Jim - AD6CW __ 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] KX3 vs FT817 - how do the insidedimensions compare?
While we're OT, does someone have an accurate AND current list of general coverage things to listen in on? I used to love to do that, until I got licensed and could actually talk to those far away places. And my exchange students were impressed and amused when I could hand them a current issue the Kyodo daily news (via FAX) with their breakfast. ;-) Rick WA6NHC -Original Message- From: Paul Christensen I had the impression that the rise of the Ham-band-only transceiver in the 1950's and 60's was based on simple economics. It was cheaper to drop general coverage receive... I have several Hallicrafters receivers snipped __ 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] KX3 vs FT817 - how do the insidedimensions compare?
You misunderstood Paul. It think we're in full agreement. The top end receivers (I had an HRO-5) were expensive and mechanically complex to provide tracking, tunable input filtering. What you quoted from my post was that I said it was cheaper to skip that sort of complexity in favor of a fixed-tuned ham-band-only input filter. And, by going to fixed tuned input filters, actually improve the Ham band performance - especially when compared with the performance of most of the lower cost receivers commonly used by Hams. Dropping the multi-section tuning caps resulted in a great mechanical simplification too. Just a guess, but doubt that the multiple-stage tuned input filters in my HRO were as good as a good fixed tuned filter - especially when considering the ultimate rejection of very strong signals far from the desired frequency. Note that I was speaking of RF input filtering to avoid overload, not dial calibration or tuning stability. My HRO was quite good (but I never switched the filaments off :-) and the Collins PTOs were outstanding. I had occasion to rebuild a number of those for Lockheed - they were quite an impressive electrical and mechanical design. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Paul Christensen Sent: Sunday, October 23, 2011 12:49 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 vs FT817 - how do the insidedimensions compare? I had the impression that the rise of the Ham-band-only transceiver in the 1950's and 60's was based on simple economics. It was cheaper to drop general coverage receive... Just the opposite, I think. Some of the poorest performing -- and least expensive receivers provided general coverage. The most expensive receivers of their respective eras were the Collins 75A, Collins 75S, Drake R-4, and National HRO, all of which were at the top-end of the purchasing ladder in their day... __ 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] KX3 vs FT817 - how do the insidedimensions compare?
Depends on what you are trying to accomplish. If it is to prove you can pick up the signal direct through the air then SWL is the name of the game. (DXing is two way SWL i guess). But if it is truly the content you are interested in then Internet radio is the thing. Yes, you can do it with the computer but I just bought an Internet radio from C Crane. http://www.ccrane.com/radios/wifi-radios/cc-wifi-radio.aspx Best way of listening to foreign radio stations I have run into. Great for listening to a lot of home town stations, too. Now back to that two way SWL stuff on my K3 David K0LUM At 1:44 PM -0700 10/23/11, Rick Bates wrote: While we're OT, does someone have an accurate AND current list of general coverage things to listen in on? I used to love to do that, until I got licensed and could actually talk to those far away places. And my exchange students were impressed and amused when I could hand them a current issue the Kyodo daily news (via FAX) with their breakfast. ;-) Rick WA6NHC __ 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] KX3 vs FT817 - how do the inside dimensions compare?
On 10/23/2011 12:12 PM, Ron D'Eau Claire wrote: I had the impression that the rise of the Ham-band-only transceiver in the 1950's and 60's was based on simple economics. I have the GC BPF for my K3, and it works very well. There is still some press to be found on RTTY [usually 850 Hz shift], and sometimes I find the BBC. They have a lot of exposure here in the US via NPR and others, but it's fun to hear it from the Mother Country occasionally. Sometimes I start copying the numbers stations just wondering whose spies I'm hearing :-)) I think the rise of the transceiver [vs separate tx and rx which had ruled ham shacks since the beginning of time] was the result of the KWM-2. Tuning SSB was hard on the receivers of that day, zero-beating your TX was even harder. When a box appeared that absolutely guaranteed you were transmitting on the same frequency as you were listening, hams embraced the concept [and SSB] almost fully [there were some AM holdouts, still are I guess]. Art's masterful scheme of a RX/TX covering 200 KHz around 3 MHz preceded by a crystal controlled converter for any 200 KHz range in the HF spectrum seems to have gotten everyone used to the idea of ham-band-only, although the KWM-2A with it's switchable crystal decks was by far and away the HF workhorse for the US Military in the 60's on other than ham band frequencies. The S-line was just a KWM-2 split into a RX and TX. A data point I'd sure like to see is how my K3 stacks up against the S-3 line I wish I had held onto. I had the 2.1 KHz and 500 Hz mech filters, I know there was a 250 Hz available, but I wonder how it would do with the blocking tests we now spend so much time scrutinizing. Not that I'm about to give up my K3 :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 2012 Cal QSO Party 6-7 Oct 2012 - www.cqp.org __ 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] OT: General coverage
Is this table from Sherwood Engineering what you're looking for? http://www.sherweng.com/table.html The K3 receiver specs are there, as well as those for the 75S-3B and 3C. 72/73 de Jim - AD6CW On 10/23/2011 4:25 PM, Fred Jensen wrote: A data point I'd sure like to see is how my K3 stacks up against the S-3 line I wish I had held onto. I had the 2.1 KHz and 500 Hz mech filters, I know there was a 250 Hz available, but I wonder how it would do with the blocking tests we now spend so much time scrutinizing. Not that I'm about to give up my K3 :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 2012 Cal QSO Party 6-7 Oct 2012 - www.cqp.org __ 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] OT: General coverage
On 10/23/2011 6:02 PM, Jim Lowman wrote: Is this table from Sherwood Engineering what you're looking for? Wow!! Overwhelming data! Let me see what I can do with this after getting rid of all the stuff that doesn't apply. 73, Fred K6DGW - Northern California Contest Club - CU in the 2012 Cal QSO Party 6-7 Oct 2012 - www.cqp.org __ 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 results (10/23/11)
We had a good net with generally strong signal levels. We had 35 participants over a 25 minute period. Lyle tantalized us with KX3 s/n 2! There was no discussion to speak of. Have a great week. Here is the list of participants. Station NameQTH Rig S/N WB6CLZ MikeCA K3 4522 AE6IC FredCA K3 2241 KG6IRW David CA K3 4982 N6JWJohnCA K3/2936/3290 WO1IDickMA K3 911 W5ETJ GaryTX K3 3227 N1OXA IvanME K3 4538 W4PFM PaulVA K3 1673 K6BFBernard CA K3 4608 K6CGDickCA K3 3697 AL7CE Terry AK K3 5137 K4GCJ Gerry NC K3 1597 K7BRR BillAZ K3 5545 KK7PLyleWA KX3 2 K7QHD KurtAZ K2 1538 K6DSW Don CA K3 3138 K5UTG Warren OK K3 4035 W6VYBob CA K3 5788 KN5LJohnTX K3 4448 K6VWE StanMI K3 650 NA6ZDon CA K3 5495 KJ7RT GaryAZ K2 681510w KJ6CBS DaveCA K3 405210w NV5ERob TX K3 1417 WA6NHC RickCA K3 5882 AB7CE Roy MT K2 40 QRP KA0NCR Arnie NE K3 185 W4RKS Jim AL K3 3618 KC9LIF KentIL K2 68965w W7NMD Palmer AR K3 3779 KE5RBS Kelvin AR K2 7162 N1KGP Marty CT K3 5255 W8YMO Harry OH K3 166 NK8ADaveOH K3 5411 NS7PPhilOR K3 1826 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
Re: [Elecraft] OT: General coverage
Interesting stuff, but I really don't want to know the specs on my WWII vintage HRO-5. Everything's relative. My HRO was a huge step up from my previous regen and S-38. And, over the years, it went through several evolutions with the addition of a beam-deflection mixer, second 2.5 kHz xtal filter in the I.F. and, by the time I donated it to a new Ham for his first rx about 1970, it was all solid state! The most disappointing thing about modern Ham gear with every cubic inch filled with I.C.s and digital controllers is that it's not nearly so easy to tinker with and adapt. Ron AC7AC -Original Message- On 10/23/2011 6:02 PM, Jim Lowman wrote: Is this table from Sherwood Engineering what you're looking for? Wow!! Overwhelming data! Let me see what I can do with this after getting rid of all the stuff that doesn't apply. 73, Fred K6DGW __ 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: Can the Panadapter be used with a Ten Tec Orion 1?
Hi all: I realize that the P3 can be set to function with various transceivers, but can it be used with an Orion 1 (the original model, not the current model)? Im not really interested in using the Panadapter for monitoring On Air received signals (although that might be nice if it worked well for that purpose as well because the scope in the Orion, well, sucks!). No, what I want to do with my P3 is use it as a local spectrun analyser scope to set audio frequency response and equalization for transmission. Transmitting into a dummy load and turning monitor on, I can hear the monitor output of the Orion, but it would be nice to also SEE it as well to better and more accurately shape the signal. Yes its better to do it with another receiver, but time is of the essence in this environment. Lacking a audio spectrum analyser, but having a P3, I thought I could put it to good use next weekend for setting up consistent audio levels and processing in this Ten Tec environment. I have 12 Orion 1 transceivers to match and not much time to do it, so it would be a helpful tool to have! Thanks in advance. Lu Romero - W4LT K3 #3182/P3 # 1302 And now K1 # 2539 __ 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: Can the Panadapter be used with a Ten Tec Orion 1?
Lu, I don't like to discourage list members away from Elecraft products, but I do not know if the P3 will do the task you are asking about - it depends on what other equipment you have to use along with the P3. Yes, the P3 can do the job IF you have the other equipment to run it for your immediate purposes. I would suggest that you also investigate the Simple Spectrum Analyzer by G4AON used in conjunction with Spectrogram or SpectrumLab or other computer based FFT audio spectrum analyzer. You can find information on the resistive tap and the mixer at http://www.astromag.co.uk/ssa/. This is an adaptation of the 40 dB resistive tap from the W7ZOI Power Meter along with a mixer to bring the signal down to baseband where it can be analyzed with an audio FFT spectrum analyzer. 73, Don W3FPR On 10/23/2011 11:08 PM, Luis V. Romero wrote: Hi all: I realize that the P3 can be set to function with various transceivers, but can it be used with an Orion 1 (the original model, not the current model)? Im not really interested in using the Panadapter for monitoring On Air received signals (although that might be nice if it worked well for that purpose as well because the scope in the Orion, well, sucks!). No, what I want to do with my P3 is use it as a local spectrun analyser scope to set audio frequency response and equalization for transmission. Transmitting into a dummy load and turning monitor on, I can hear the monitor output of the Orion, but it would be nice to also SEE it as well to better and more accurately shape the signal. Yes its better to do it with another receiver, but time is of the essence in this environment. Lacking a audio spectrum analyser, but having a P3, I thought I could put it to good use next weekend for setting up consistent audio levels and processing in this Ten Tec environment. I have 12 Orion 1 transceivers to match and not much time to do it, so it would be a helpful tool to have! Thanks in advance. Lu Romero - W4LT K3 #3182/P3 # 1302 And now K1 # 2539 __ 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] Metal Film Resistors In K2?
I'm getting closer and closer to pulling the trigger on a K2 and I have a question that I hope Wayne or Eric will give their thoughts on. I know that the K2 is known for it's low-noise receiver but I'm wondering whether substituting metal film resistors for the carbon film ones that come with the kit would reduce the noise even more? I'm thinking that it certaily can't hurt - that there could only be an upside. I did perform a search before asking this question to see whether anyone else has asked, but didn't find anything. Dave AA7EE __ 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
