Re: [Elecraft] OT: Australian fires
Hi Wayne Thanks for thinking of us. A horrendous situation and at the worst possible time with so many people on their summer holidays in the most fire prone areas. We have a team of US / Canadian firefighters here that came over before Christmas to bring their expertise to the fight. And Aussies were in California and Canada during your fire season. Wonderful to see how we can help each other in trying times. Best wishes Mike VK1OO - Cheers Mike VK1OO (ex AC7MZ, VK1KCK) K2: 2599 -- Sent from: http://elecraft.365791.n2.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] A New Choke Book - Some Questions
Hi Jim, Thanks. I don't know how I missed the section "Chokes in Series"! I really appreciate the extensive work you did to build and measure all the chokes. You are making a difference to small suburban stations like mine that live in a sea of noise. Cheers Mike, VK1OO - Cheers Mike VK1OO (ex AC7MZ, VK1KCK) K2: 2599 -- Sent from: http://elecraft.365791.n2.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] A New Choke Book - Some Questions
Hi Jim, Thanks for the New Choke Cookbook. Looking at your data, it seems to me that I could build a two core choke for the higher frequency bands and "spread" the overall choking impedance out by using different turns on each core, ie 11 turns on a 2.4" and 12 turns on a 2.4" . I believe there are no issues doing so, but would appreciate your confirmation. Also, do you have any guidance on the spacing required when packaging a two core choke, ie if the two cores were in a box, what vertical spacing is required between them? Cheers Mike, VK1OO __ 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] Headset PTT Options
All, At the risk of this request being lost in the euphoric response to the K3 K-Pod. I'm wondering what options you might be using / prefer to provide the PTT function for a K3S connected headset. I know options including (1) VOX, (2) PTT button on an alternative plugged in microphone, (3) PTT pickle switch, (4) PTT foot switch. What about your preference for enabling several (ie pickle and foot switch) of these in parallel Mike VK1OO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3-KPA500] SWR jumps up with 5 second key down
All, I think I've finally found the cause of my problem. The PVC spacer that goes around the driven element where it is attached to the boom plate has a cut down one side to to allow it to compress when tightened with a u-bolt. What I could not notice until I totally dismantled the element was that the split was full of carbon as was the mounting plate along the length of the split. I am assuming that the split which was facing up filled up with water and helped create an arc between the driven element and mounting plate. Mike VK1OO - Cheers Mike VK1OO (ex AC7MZ, VK1KCK) K2: 2599 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-KPA500-SWR-jumps-up-with-5-second-key-down-tp7557071p7573168.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-KPA500] SWR jumps up with 5 second key down
Hi Mike, I have the same Q-52 and am beginning to experience the same issue on 20m. Did you get the issue resolved? Where exactly was the problem? Any help would be appeciated. Mike VK1OO - Cheers Mike VK1OO (ex AC7MZ, VK1KCK) K2: 2599 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-KPA500-SWR-jumps-up-with-5-second-key-down-tp7557071p7570073.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 audio problem
Hi George, I have a similar set-up, having added the KPA500 two or so weeks ago. Recently a local ham using an SDR as a spectrum analyser notied that I have a lot of splatter on my signal. The KPA500 is locted about 8 inches above the K2 and KPA100. I have not fittted the VCO Shield. Thanks to your email I now have another possible cause to investigate. - Cheers Mike VK1OO (ex AC7MZ, VK1KCK) K2: 2599 -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-audio-problem-tp7564435p7564449.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: with KPA500, experience anyone?
Hello Andrew, My set up is similar to Johhny, but with the cables connected from the KPA100. I am using relatively resonant antennas, so have tuned the KPA100/KAT100 combination into a dummy load on these bands and set the KAT100 in the locked mode (sorry can't remember the correct designation) so that there is no mismatch between the output of the KPA100/KAT100 and the KPA500. I have an emerging issue - see previous post from George NC5G and subsequent replies. Mike VK100 - Cheers Mike VK1OO (ex AC7MZ, VK1KCK) K2: 2599 -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-with-KPA500-experience-anyone-tp7564428p7564446.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] OT - PC Oscilliscope Performance
All, Just found this PC based oscilloscope http://www.bitscope.com/product/BS310/ and wonder what you think of it. Yes you are limited by needing a PC, but the waveform generator, spectrum analyser and logic analyser functionality seem to be most versatile. Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] test
___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] RE: K2 Microphone Jack Grounding - Is there a Pin 1 Issue?
Hi Don, Thanks for the advice. I did it the easy way. Looking at the other jacks etc it seems that they are mounted to the enclosure panels, so probably no Pin 1 problems with them. The microphone jack is the odd one out as it is mounted via tabs to the pcb. Cheers Mike VK1KCK K2 #2599 _ From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Monday, 7 January 2008 12:00 AM To: Mike Walkington Subject: Re: K2 Microphone Jack Grounding - Is there a Pin 1 Issue? Mike, To cure the 'pin 1' problem, it would be necessary to connect the mic jack shell both to the board ground and to the enclosure panel quite near the mic jack. Grounding to the enclosure would require drilling an additional hole in the front panel bext to the mic jack - preferrably a countersunk hole above one of the standoffs that are located next to the mic jack. But that kind of sheet metal work is not for everyone, and may be overkill. If is normally sufficient to ground the mic jack to the PC board ground. The K3 grounds the mic jack to the PC board. I would ground the jack to the PC board because that is easy to do. If you encounter problems such as RF pickup, you may want to add the ground to the case, but in extreme situations you would also want to similarly treat the KIO2 (and use balanced cable to the computer), the key jack, and perhaps any other connector on the K2 should be investigated for a 'pin 1' situation. Such extreme measures are rarely required. 73, Don W3FPR Mike Walkington wrote: Hi All, Thanks for getting back to me. I vaguely remember there being some discussion about a "pin 1 " issue. Should the mic jack be grounded to the pcb or to the case? Does it matter? How is the microphone jack grounded on the K3? Mike VK1KCK K2 #2599 _ No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1210 - Release Date: 1/5/2008 11:46 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Elecraft Email Archives
Clearly asleep then! _ From: Gary Hvizdak [mailto:[EMAIL PROTECTED] Sent: Monday, 7 January 2008 9:23 PM To: [EMAIL PROTECTED] Subject: [Elecraft] Elecraft Email Archives Mike, See http://www.elecraft.com/elist.html for Elecraft's list. 73, Gary KI4GGX _ Mike Walkington Mon Jan 7 04:42:55 EST 2008 _ All, Have I been asleep, or is there a rash of Elecraft archives appearing. Julian, G4ILO, spotted the google one a few days ago, but nabble? http://www.nabble.com/Elecraft-f28632.html http://www.mail-archive.com/elecraft@mailman.qth.net/info.html http://groups.google.com/group/elecraft-archive Mike VK1KCK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft Email Archives
All, Have I been asleep, or is there a rash of Elecraft archives appearing. Julian, G4ILO, spotted the google one a few days ago, but nabble? http://www.nabble.com/Elecraft-f28632.html http://www.mail-archive.com/elecraft@mailman.qth.net/info.html http://groups.google.com/group/elecraft-archive Mike VK1KCK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 Microphone Jack Grounding - Is there a Pin 1 Issue?
Hi All, Thanks for getting back to me. I vaguely remember there being some discussion about a "pin 1 " issue. Should the mic jack be grounded to the pcb or to the case? Does it matter? How is the microphone jack grounded on the K3? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 Microphone Jack Grounding
Hi, Just wondering what the definitive advice is on doing the K2 Microphone Jack Grounding modification. I note there is no mention of doing this in either the K2 or KSB2 manuals? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft: Re Radios on Networks
Is this the making of a standard interface? http://rigserve.sourceforge.net/about.html Mike VK1KCK K2#2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft - Re Network Enabled Radio & Accessory Interface (Was USB Ports and Things)
Hi, I second this idea. I've been working on this one in my mind for ages. Mostly with the idea of being able to remotely operate my radio from anywhere in the house over a wireless network from a laptop. Secondly with the idea that I wouldn't need a dedicated computer at the radio end. Thirdly, that if done well, all the radio/equipment interfaces would become multiplatform, ie run off any comprehensive system/application. Cheers Mike VK1KCk K2#2599 Message: 38 Date: Mon, 4 Jun 2007 08:27:17 -0700 From: Brian Lloyd <[EMAIL PROTECTED]> Subject: Re: [Elecraft] USB ports and things - with corrections To: lyle johnson <[EMAIL PROTECTED]> Cc: Elecraft Reflector Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed On Jun 4, 2007, at 7:24 AM, lyle johnson wrote: > You can buy PCMCIA or Cardbus to Parallel port adapters for $60 or > less. But they don't work with many computers. None of my Dells > that lack legacy ports will recognize any of the available cards > (or at least the three that I located and bougfht); my Dells with > legacy ports recognize and use all of them with no problems, so > there is a BIOS issue you must contend with. > > Sorry to be the bearer of bad news, This is an interesting problem with a common thread. Much software has been written to make [mis]use of various interfaces on "standard" hardware. The use of a parallel port to control something is typical. What we really need is a general purpose device that interfaces on the network and may be easily addressed by software. In most systems software has easy access to the network so it seems to me to make sense to put our various bits of I/O into a bit of kit that speaks IP and plugs into an ethernet. 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Antenna Analyser - Phase Angle Sensor
Hi, When discussing antenna analysers there's always a discussion on the issue of measuring the sign of X. For some years now I've carted round an article out of the Power Amplifier Handbook titled High-Speed Microprocessor Controlled Antenna Matching Unit, in which the author implemented a phase angle sensor which output a logic one for inductive phase angle and logic 0 for capacitive. The circuit didn't look like it was too complex to implement, so I've always wondered why such a circuit isn't implemented in every antenna analyser. Mike VK1KCK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Vetical Antennas
Hi All, I've moved to a new house and I'm trying to get a Hustler 5BTV working really well with my K2 in my new location. I plan to install the antenna in a ground plane configuration on a 2 storey home and feed it with coax. I was planning to use a few quarter wave radial for each of the bands of interest. I've had problems with TVI using this antenna before, so this time I will use some sort of a choke to block currents on the outer surface of the coax braid. Any suggestions on what I should use? How should I protect myself from lightning? I initially thought about running a lead from the base of the antenna to ground, but the length of this would probably turn the antenna into a vertical dipole. I was reading some doco for this antenna and read the following: Never use an antenna tuner to tune the antenna.Use of a tuner only fools the transmitter and does not correct a problem at the antenna. This doesn't seem right can I use my K2's tuners? Finally, I've been reading Moxon's HF Antennas for All Locations, and he doesn't seem to recommend quarter wave radials for ground planes. I'm not sure I comprehend why. Is anyone familiar with his concerns? Mike VK1KCK, K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] What to do with the left over panels?
All, Some time ago - late 2003! - I put my KPA100 and KAT100 into an EC2. I bought the KAT100 with the "EC2 panels". I'm more than pleased with the result, but being busy, I've only just realised that the left over panels provide almost all of an EC2. That is, I have the rear, front and top panels. All I'm missing is the two sides, the bottom panel, some of the marvellous connectors that hold it all together and a few machine screws. Interesting, and clearly an accessory box in the making. What's everyone else doing with these parts? I know I can get the connectors from Elecraft, what about the missing panels? Mike VK1KCK AC7MZ K2#2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: : [Elecraft] K2, LP-100 and HRD etc
Hi Larry, That's even better, but cables get old and get water in them too. Mike -Original Message- From: Larry Phipps [mailto:[EMAIL PROTECTED] Sent: Wednesday, 5 April 2006 11:47 PM To: Mike Walkington Cc: Elecraft-Reflector Subject: Re: : [Elecraft] K2, LP-100 and HRD etc You won't need to do that. I'm planning to allow you to enter a feedline characteristic Z, length and loss/100 ft., and then add a button that will allow you to display all the parameters as "at xmtr" or "at antenna". You could use any feedline type or length that you know the published specs on. I am also thinking about adding the feedline data entry capability to the standard LP-100 VCP (Virtual Control Panel). I would offer the ability to enter several feedlines, which would be selected based on frequency. I am considering allowing you to upload the feedline table to the LP-100 hardware as well, so that it would display correct antenna Z if desired. Since the LP-100 has a built-in frequency counter, the table selection would be automatic. I may also add a menu to allow the table to be entered at the hardware. For this to work in the hardware or VCP, you would have to determine the sign of X experimentally and enter it on the Vector display using the Up/Dn buttons. This would only have to be done once for each antenna. The Plot program does this automatically, by looking at the slope of the X plot for each data point. Some of this will be future updates of firmware or software. You can update the LP-100 firmware and software over the internet, and there will be regular updates offered for both. Updates will be free for life, although there will be charges for add-on hardware if it becomes necessary to add hardware for a particular option in the future. All updates will be backward compatible with the original hardware, however. 73, Larry N8LP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Aussy Speech
Reminds me that Wombats eat roots and leaves ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
: [Elecraft] K2, LP-100 and HRD etc
Neat, So will it be possible to do one scan with a 50ohm load terminating the cable, then do it again with the antenna connected, "subtract" the plots and end up with the antenna characteristics? Mike VK1KCK K1 #2599 Message: 20 Date: Tue, 04 Apr 2006 13:56:03 -0400 From: Larry Phipps <[EMAIL PROTECTED]> Subject: Re: [Elecraft] K2, LP-100 and HRD etc To: Mike Walkington <[EMAIL PROTECTED]> Cc: Elecraft-Reflector Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed The LP-100 Plot software does this already if you use DXlabs Commander (freeware) or TRX-Manager. It doesn't matter what rig is selected, it will work with any supported rig. You set the start and stop frequencies and step size, then hit Run. The program controls the rig and gathers the data. You can select the parameters to plot either before or after running, and save the plots to a file in CSV format for later recall or export to a spreadsheet. It may be possible to add HRD, but I don't see a linking component for them that accepts all the incoming commands needed. You can see a screen capture of the LP-100 Plot software at www.telepostinc.com/lp100.html, along with a comparison to a couple of antenna analyzers I own as well as my HP87510A VNA. 73, Larry N8LP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2, LP-100 and HRD etc
All, It seems to me that is should be possible to write a piece of software that controls the K2 transmit frequency (steps it up in increments), reads the LP-100 SWR, power etc, and produces plots for each ham band of frequency versus SWR, power etc. It would sure be nice if this was built into HRD. Mike VK1KCK K2#2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re Competition for Elecraft
All, I don't get it. Being a performance per $$ snob, I haven't yet seen the receiver performance numbers that would convince that the money is worth it. Am I missing something? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 KPA100 Low Power Output Problem Mostly Solved
All, After thinking the advice I got from several of you and trolling back through the e-mail archives I found my problem. A little embarrassing to tell you, but the cause of my low KPA100 output power on all bands was due to a sagging power supply, but hopefully my experience will help others :( My paradigm (dastardly things that they are) was thinking that the KPA100's current need was the total required. I forgot to add in the basic K2's current needs! At least my component identification, soldering technique etc was OK :) Power output is now good on all bands except on 160 where I'm still experiencing excessive current drain. I still don't believe the results I got from scanning the LPFs with the antenna analyser. Specifically, what is the relationship between the SWR results and the likely cut-off frequency? What is the likely impact on receiver performance? Mike VK1KCK K2 #2599 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Walkington Sent: Tuesday, July 05, 2005 6:00 AM To: Elecraft-Reflector Subject: [Elecraft] K2 - KPA100 Low Power LPF Performance All, I'm investigating low power output from my KPA100 and have scanned the LPFs as suggested in the troubleshooting section. My results were as follows: Using an MFJ259 and having checked that MFJ output freq matches freq on K2 ie MFJ is aligned, I scanned low pass filters. Here is the synopsis of the SWR: 160m - Approx 1.0 from below 1.73MHz to 2.25MHz, climbs to 1.5 at 2.50MHz 80m - Approx 1.0 from 2.00MHz, starts climbing at 3.25MHz but approx 1.1 to 4.00MHz 40m/30m - Approx 1.0 from 5.00MHz, starts climbing at 9.25MHz (1.2), 10.00MHz (1.5), 10.8MHz (1.2), dips at 11.00MHz (1.0) and climbs again 11.26MHz (1.2) and 11.36MHz (1.5) 20m/17m - Approx 1.0 from 13.40MHz, starts climbing at 15.00MHz (1.05), 15.50MHz (1.18), 16.00MHz (1.2), 16.50MHz (1.35), past 17.00MHz over 1.5 15m/12m/10m - Approx 1.5 from 20.00MHz to 25MHz, dips 25.50MHz (1.2), 26.00MHz (1.15), 26.50MHz (1.0), stays down and rises at 28.00MHz (1.2), 28.50MHz (1.2), 29.00MHz (1.5) Has anyone else scanned the filters in this fashion, especially for a KPA delivering full output power/ If so, what were the results, ie I'm looking to see what is considered normal. Did anyone else have LPF issues and what were they? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 - KPA100 Low Power LPF Performance
All, I'm investigating low power output from my KPA100 and have scanned the LPFs as suggested in the troubleshooting section. My results were as follows: Using an MFJ259 and having checked that MFJ output freq matches freq on K2 ie MFJ is aligned, I scanned low pass filters. Here is the synopsis of the SWR: 160m - Approx 1.0 from below 1.73MHz to 2.25MHz, climbs to 1.5 at 2.50MHz 80m - Approx 1.0 from 2.00MHz, starts climbing at 3.25MHz but approx 1.1 to 4.00MHz 40m/30m - Approx 1.0 from 5.00MHz, starts climbing at 9.25MHz (1.2), 10.00MHz (1.5), 10.8MHz (1.2), dips at 11.00MHz (1.0) and climbs again 11.26MHz (1.2) and 11.36MHz (1.5) 20m/17m - Approx 1.0 from 13.40MHz, starts climbing at 15.00MHz (1.05), 15.50MHz (1.18), 16.00MHz (1.2), 16.50MHz (1.35), past 17.00MHz over 1.5 15m/12m/10m - Approx 1.5 from 20.00MHz to 25MHz, dips 25.50MHz (1.2), 26.00MHz (1.15), 26.50MHz (1.0), stays down and rises at 28.00MHz (1.2), 28.50MHz (1.2), 29.00MHz (1.5) Has anyone else scanned the filters in this fashion, especially for a KPA delivering full output power/ If so, what were the results, ie I'm looking to see what is considered normal. Did anyone else have LPF issues and what were they? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Low KPA100 Output
Hi Don, Thanks for yoor previous comments re the low output power from my KPA100. I have checked all low pass filter components and they are fine. Using an MFJ259 and having checked that MFJ output freq matches freq on K2 ie MFJ is aligned, I scanned low pass filters. Here is the synopsis of the SWR: 160m - Approx 1.0 from below 1.73MHz to 2.25MHz, climbs to 1.5 at 2.50MHz 80m - Approx 1.0 from 2.00MHz, starts climbing at 3.25MHz but approx 1.1 to 4.00MHz 40m/30m - Approx 1.0 from 5.00MHz, starts climbing at 9.25MHz (1.2), 10.00MHz (1.5), 10.8MHz (1.2), dips at 11.00MHz (1.0) and climbs again 11.26MHz (1.2) and 11.36MHz (1.5) 20m/17m - Approx 1.0 from 13.40MHz, starts climbing at 15.00MHz (1.05), 15.50MHz (1.18), 16.00MHz (1.2), 16.50MHz (1.35), past 17.00MHz over 1.5 15m/12m/10m - Approx 1.5 from 20.00MHz to 25MHz, dips 25.50MHz (1.2), 26.00MHz (1.15), 26.50MHz (1.0), stays down and rises at 28.00MHz (1.2), 28.50MHz (1.2), 29.00MHz (1.5) LPF Analysis and output power: 160m LPF seems OK, output power approx 70W 80m LPF seems OK, output power approx 60W 40m/30m LPF seems too low, output power 60-70W 20m/17m LPF seems low, output power 90W (This seems odd) on 20m, 60W on 17m 15m/12m/10m LPF really odd, looks like a notch filter centred on 27MHz, output power approx 60W Something seems to be affecting the LPFs. I can only assume it's the SWR Bridge or RFC10. Any suggestions? Mike VK1KCK K2#2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] RE: K2 and KPA 100- How Is Hi Current Generated
Hi Jim, Good question. While I have been troubleshooting the KPA I have left the KAT100 out of circuit - I don't need it while transmitting into a dummy load. The AT-200 has a straight through mode for power measurement that I am using. I only borrowed the AT-200 for power meter as the KAT100 is excellent :). Mike VK1KCK K2 #2599 -Original Message- From: k4zm [mailto:[EMAIL PROTECTED] Sent: Wednesday, 29 June 2005 9:44 AM To: Mike Walkington Subject: Re: [Elecraft] RE: K2 and KPA 100- How Is Hi Current Generated Don: Do you have the Kenwood AT-200 installed between the KPA100 and the KAT100 or beween the KAT100 Output and the antenna? If connected on the output of the KAT100 you cannot expect to see an accurate SWR/POWER indication on the AT-200. 73 Jim Younce K4ZM K2 SN: 18 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] RE: K2 and KPA 100- How Is Hi Current Generated
Hi Don, Thanks for your reply. First the easy answers: I'm using two dummy loads, the primary one being an old fashioned tubular carbon resistor - about half an inch across and two inches long. Both show a flat response across the spectrum when scanned with an MFJ-259 analyzer. I'm using the power meter built into a Kenwood AT-200 Antenna Tuner to measure power. I use a KAT100 as a tuner though. The AT-200 handbook claims it has plus/minus 10% accuracy at full scale (20W and 200W) ranges. By the way, I rechecked the K2 power output and its fine 15W at 160M falling to 12 or so at 10m. KPA100 low pass filters were swept with MFJ259 as described in manual and by you. I used a 51 ohm resistor. Sweeps on other bands seemed OK 1:1.1 and 1:1.2. My concern re high SWR on 30m and 10m was that the KPA100 might reduce power if it detected SWR greater than 1.5, but I wasn't sure where this would be detected. I'll need to recheck LPF components values, but believe they were OK. Still, I wouldn't be the first person on the reflector to have misplaced confidence ;). I'll also try spreading the torroid coils. Do you have any suggestion on which torroid to start with, ie one closest to antenna, or tx or the one in the middle? I had fixed the HI Current warning by resetting R26/27 and adjusting bias, but still wasn't getting the specified power out. Reading back through the archives there was a suggestion that when setting R26 you should change the power output each time (to reset the ALC). I did a bit of this but can't recollect if I did it every time. Still would failing to do this make much of a difference? Mike VK1KCK K2 #2599 > -Original Reply- Mike, How are you measuring power out? and how good is your dummy load? (check it with your antenna analyzer) - that will get the first things out of the way for us. OK, you said you swept the KPA100 low pass filters for 30 through 10 and found them OK, (well, you found 1.5 or less and I would expect 1.2 or 1.3, but you will have to tell me how you set up for the sweep before I draw any conclusions). What do the sweeps for 160 through 40 meters show? If you do the sweep as above, you should find the SWR 1.2 or below in most cases - if not, look carefully at your toroids (count the turns) and triple check the capacitor values. I have found on occasion that the SWR on 10 meters can be reduced a bit by judicious spreading/compressing the turns of the 10/12/15 meter LPF, but the other bands fall into place without any 'tweaking'. In any case, such 'tweaking' will not improve the KPA100 power output, but will allow the base K2 to drive through the high power LPF a bit easier when at the QRP levels. Bottom line here - such 'tweaking' will not solve whatever problem you have. I doubt that the new capacitors will solve this particular problem either - indeed you may end up installing the new capacitors, but if you have a problem with 160 through 40 meters, the capacitors are not likely to fix it. The bias control setting on the KPA100 will not produce the symptoms you describe either - yes it will affect the current drawn by the KPA100, but remembere that the HI-CUR indication means that the base K2 is drawing too much current (it is being asked to produce more power than the current limit will allow) 73, Don W3FPR > -Original Message- > > I've just spent the day fine tuning my KPA100 - measuring the output power > on each band and trying to improve it. Initially I was getting a > HI Current > warning on each of the bands from 160 through to 40 (all into a > dummy load), > but not on the rest. In all cases the maximum power I could get > out on each > band was 50-65W. I reset R26/R27 and the bias current and now the > HI Current > warning has gone and power output has improved on most bands to > 70+W, but is > not yet 100W. Some observations and questions that came up: > > Can someone please explain to me how the HI Current warning is generated? > Is it likely that my bias current is a little low? > I swept the low pass filters with an antenna analyser and the SWR > on 30m and > 10m is about 1.5. All the components look to be right, and I feel that > spreading or compressing the turns on the applicable torroids may > upset the > associated filters. Is 1.5 too high (I have the previous version of the > KPA100 firmware)? > Is the new KPA Capacitor mod likely to help? > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 and KPA 100- How Is Hi Current Generated
Hi All, I've just spent the day fine tuning my KPA100 - measuring the output power on each band and trying to improve it. Initially I was getting a HI Current warning on each of the bands from 160 through to 40 (all into a dummy load), but not on the rest. In all cases the maximum power I could get out on each band was 50-65W. I reset R26/R27 and the bias current and now the HI Current warning has gone and power output has improved on most bands to 70+W, but is not yet 100W. Some observations and questions that came up: Can someone please explain to me how the HI Current warning is generated? Is it likely that my bias current is a little low? I swept the low pass filters with an antenna analyser and the SWR on 30m and 10m is about 1.5. All the components look to be right, and I feel that spreading or compressing the turns on the applicable torroids may upset the associated filters. Is 1.5 too high (I have the previous version of the KPA100 firmware)? Is the new KPA Capacitor mod likely to help? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Morse with a Nokia
You can send morse with your Nokia, I'll stick to my K2. http://laivakoira.typepad.com/blog/2005/05/morse_texter.html Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft Growth Metric
Hi All, Sunspot count is low and I'm at a bit of a loose end. Latest version of QST arrived. Check the Elecraft advertisement - it has grown again. So my question is: How long do you think it will be before Elecraft needs/has a full page advertisement? Mike VK1KCK K2 # 2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Norton AntiSpam] Re: [Elecraft] How Do Elecraft Revision Sheets Work?
Hi Jack, Thanks for this, it makes good sense. I'm trying to work out what's the best way of tracking the minor improvements/changes that are made along the way, especially to the optional add-ons, and to catch up with any that are worthwhile. Mike VK1KCK K2#2599 -Original Message- From: Jack Brindle [mailto:[EMAIL PROTECTED] Sent: Monday, 23 May 2005 2:16 AM To: Elecraft Reflector Cc: [EMAIL PROTECTED]; Gary Hvizdak Subject: [Norton AntiSpam] Re: [Elecraft] How Do Elecraft Revision Sheets Work? > Can someone please explain how Elecraft's revision sheet numbering > works? > For example, does a sheet numbered B-3 include all of the changes > described > in B-1 and B-2, ie are the sheets accumulative? What causes an > "alphabetical" level change? Etc etc Errata sheets show manual changes, and are labeled as to the revision of the product's manual to which they correspond. If the product's manual is at Rev B, then the errata sheet will show rev B. After that, the number is the sequence number for the sheet. If it is the first errata for the rev B manual, it will be B-1. Hopefully there won't be many errors, and we will catch them all in the first sheet. If not, then the second one will list all changes (making it cumulative). When we issue the next version of the manual (Rev C in this case) it should catch all the errata, and so those sheets will go away. Should the Rev C manual later need a change, it would be labeled C-1... Make sense? - Jack Brindle, W6FB - ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] How Do Elecraft Revision Sheets Work?
Hi all, Can someone please explain how Elecraft's revision sheet numbering works? For example, does a sheet numbered B-3 include all of the changes described in B-1 and B-2, ie are the sheets accumulative? What causes an "alphabetical" level change? Etc etc Mike VK1KCK K2# 2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] del.icio.us elecraft K2 tags
All, For what its worth, I have started adding some Elecraft K2 user web pages to del.icio.us using elecraft and K2 as the tags. If everyone that has an elecraft centric web page does this using applicable tags selected from the likes of: elecraft, K2, K1, T1 etc then we will all be able to very quickly find such pages and related interests. Mike VK1KCK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Tin Whiskers
Check this out, and hope that you used some solder with Pb in it! http://nepp.nasa.gov/whisker/photos/ Mike VK1KCK K2#2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Nee Tektronix 2225 Service Manual
Hi, Apologies for being off topic, but can anyone advise me where I can obtain a Tek 2225 Service Manual / Schematic. Thanks Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Missing Digests
I appear to be missing every second reflector digest every 3 or 4 days. Is anyone else experiencing this? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Off Topic But I Couldn't Resist
Hi John, It may seem strange to get some advice from a VK1 re the Bitterroot Valley! I lived in Seattle from 2000 to 2003. In 2000 I read a newspaper article re the re-introduction of Grizzly Bears to the Bitterroot. This sparked my imagination because it implied that the area would probably be remote and beautiful. I reorganized our family's August 2000 summer holiday, a 21 day drive from Seattle to Mesa Verde and return through some of the most fantastic (my opinion) country in the USA to include time traveling through the Bitterroot. Sadly when we arrived the whole area was suffering from serious wildfires (what we in Australia call bushfires) and I wasn't prepared to stay in the cabin we had booked with my young children. Also it seemed morally corrupt that we would consider holidaying in an area where the majority of the locals were fighting for their survival. What we did see confirmed my opinion that the area was remote, wild and beautiful. I hope you decide to give it a go but I recommend that you join a local bush fire brigade and help them with their communications. Best wishes Mike VK1KCK K2 #2599 Message: 25 Date: Sun, 6 Feb 2005 14:22:39 -0800 From: "John, KI6WX" <[EMAIL PROTECTED]> Subject: [Elecraft] Question on Moving to Montana To: Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1" I'm considering moving to the Bitterroot Valley south of Missoula, Montana. Is there anyone on this list who lives in that area who could provide me more information on living there? Please reply directly to me since this email is grossly off topic. -John KI6WX ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] RE: CW Indicator
Hi Tom, It worked even easier than I thought. Ran Spectrogram with a frequency marker set to my SPOT frequency (600Hz). Tuned the 4.00 MHz birdy with the VFO until it lined up on the frequency marker. Turned on the SPOT and confirmed that the two tones were beating. Then adjusted the CW indicator trim pot until the solid indication came on. Then found the trim pot limits for the solid indication and set the trim pot to the middle of the range. A piece of cake. I can confirm that the indicator works even when upside down compared to the rest of the world. Cheers Mike VK1KCK K2 #2599 PS. Another VK1 is about to commit the dollars and get a K2. -Original Message- From: Tom Hammond [mailto:[EMAIL PROTECTED] Sent: Saturday, 29 January 2005 10:50 PM To: Mike Walkington Subject: Re: CW Indicator 'Lo Mike! >I'm hoping that you are still awake.. Possibly not awake when you wrote the message, but I'm awake now... c. 1145Z Saturday. Sorry if I've delayed responding... been fighting a urinary tract infection that's had my up/down every 3-6 minutes, pissing drops, for the past four days and I'm starting to tire... heheh! Other things are a LOT more fun! >I've just completed building the CW tuning indicator. All has gone >reasonably well and I am now at the alignment stage. The problem I'm having >here is exactly the reason why I need the tuning indicator ie difficultly >recognising when the two tones are beating together - but I need to be able >to do this to align the indicator! > >I have the feeling that I should be able to use Spectrogram to align the >indicator. I imagine that what I would do is turn SPOT on and tune the >4.000 MHz birdy until SPOT and the birdy where on top of each other. Once >this occurs I can then adjust the tuning indicator trimpot until the 10th >LED comes on brightly and then finess this by setting the trimpot to the >middle of the trimpot range where the 10th LED is lit. > >Does this make sense to you. If not, how do I adjust the proposed procedure? Makes perfect sense to me! If I absolutely could not (audibly) match the signal against the sidetone, I'd use your method. Using Gram, once yo get the two tones together, turn the sidetone off and use only the received signal... of course, for the K2, it really shouldn't matter since the sidetone's injected elsewhere into the AF Amp, so it should not effect the received signal itself regardless. Once you get it set at 4MHz, see if you can replicate the act with the 7 MHz birdie as well. The weaker signal from the 7 MHz birdie, may allow for a more precise final adjustment... though I'm not certain it's truly required. Please report on your results. Cheers, Tom ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] CW Indicator
Hi Tom, Im hoping that you are still awake . Ive just completed building the CW tuning indicator. All has gone reasonably well and I am now at the alignment stage. The problem Im having here is exactly the reason why I need the tuning indicator ie difficultly recognising when the two tones are beating together but I need to be able to do this to align the indicator! I have the feeling that I should be able to use Spectrogram to align the indicator. I imagine that what I would do is turn SPOT on and tune the 4.000 MHz birdy until SPOT and the birdy where on top of each other. Once this occurs I can then adjust the tuning indicator trimpot until the 10th LED comes on brightly and then finess this by setting the trimpot to the middle of the trimpot range where the 10th LED is lit. Does this make sense to you. If not, how do I adjust the proposed procedure? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Strange K2 Behaviour - KAT100 Antenna Isolation
Hi All, Continuing the theme of describing strange K2 behaviour! My KAT100 is remotely installed in an EC2. I use ANT1 with nothing connected to the 2nd antenna socket. Recently I noticed that having tuned in a relatively strong station on ANT 1 and switching to the 2nd antenna (ie by pressing ANT1/ANT2 switch) that I could still hear the station even though there is no antenna connected to ANT2. This made me wonder what the isolation is between the two antenna sockets and if anyone has measured it or whether I have a problem that I need to locate and fix. Sorry, but I haven't yet swapped the antenna to see if the behaviour reciprocates. Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Box for XG1
Hi All, I bought an XG1 for VK1DW. He wants to stick it in a box and is wondering if any one has already done so and is prepared to describe how they did it. I assume the only concern is the BNC connector and that the easiest way to solve the problem is to use a chassis mount variant and some hook up wire. 73s Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] G'Day
Hi Glenn, Good to see another Ozy with an Elecraft rig. At some stage we should try and set up a QSO so that I can talk to another K2 owner. Who knows if we scratch hard enough we may be able to get a local Elecraft net going perhaps with the Kiwis as well as any other South Pacific local! Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] AGC Threshold Adjustment by Changing R1
Hi Bob, I have an A model K2, so R1 was originally installed as a 51K. I removed it and put in a variable and determined on a quiet band, subjectively by ear, where noise with AGC on and off seemed the same. I got different readings each time I did the test, but a mid 40k reading seemed to occur the most often so I went with that. Now trying to see what others got as I'm still not 100% confident. Mike VK1KCK K2 #2599 _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, 6 January 2005 9:45 PM To: [EMAIL PROTECTED] Subject: Re: [Elecraft] AGC Threshold Adjustment by Changing R1 Hi Mike, In the latest revision of the K2 manual version F, 29 January 2004, R1 is given as 50K preset. In the world outside the USA this would indeed equate to 47K. The preset has one end strapped to the wiper so would be a continuously variable resistor from in your case 47K down to zero which is in series with the 5.1K in RP6. The preset apparently normally comes out at somewhere near half rotation or in other words about 23 to 25K. Believe the earlier versions of the K2 had a fixed resistor for R1 selected on test (SOT). Not sure of the start value used, though there seemed to be less emphasis on the adjustment then to what is current now to ensure AGC is fully off with no signal. Seems to have been a few reports recently with the resistor at one end though they did not quote which end to know the value. Regards, Bob, G3VVT K2 #4168 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] AGC Threshold Adjustment by Changing R1
Hi, In following the changes in the A to B mod instructions for adjusting R1 to fix AGC threshold I ended up reducing R1 to 47K. Is this typical of other K2 user experience? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Need for All of KPA100MODKT
Hi, I've been catching up on mods to my K2. I purchased the KPA100 in Dec 2003 and it already incorporates the crystal mod. Accordingly, it looks like I only need a handful or resistors and some solder lugs rather than an entire KPA100MODKT to be able to do the KPA100MOD. Can anybody confirm this please? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re KNB Performance
All, I do not have another radio that I can use to assess KNB2 Performance. I seem to recollect that someone reported poor KNB2 performance due to a defective/zapped component. So maybe there are other reasons for inconsistent assessments. Is there any form of objective test that we can set up to assess KNB2 performance across a number of K2s to help determine if there are common (or unique) factors at work? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 MOJO Back in the Box
Hi All, Thanks for the suggestions re recovering from a loss of receive audio. I took all the modules out, put them back and the K2 mojo came back. I'm still baffled about what occurred, but hey I'm not complaining. I finally got around to building the KAT100 over the past week - wow isn't it like magic when you are building an Elecraft kit and the various parts suddenly come together and you can see the end result. For the KAT100 for me this occurred when I bolted the RF board to the front panel. Happy Holidays Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 Help Please re Loss of Rx
Hi, Hopefully someone can help. KPA100 tests went OK so I assembled the amp into the existing K2. All seemed OK but now I have lost Rx on all bands. Problem exists when I re-install old lid and remove all option boards. Yes I know that W1 is removed for 160m board. Shunting this makes no difference. Tests seem to indicate a short across J4 on the K2 RF board. I tried the trick for resetting the relays. In reset Pins 2,3 and 4 are shorted together, Pins 2 and 3 because they should be and I assume Pin 4 through the turns on T4. In reset, the resistance from center conductor of J4 to ground is 1726 ohms (this seems OK through R67 and R68). Is it likely that I have a bad relay? How would I tell? Any other clues? Mike VK1KCK K2 #2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] VCO Relationship with 4 MHz Oscillator
Hi Ron, Thanks for this explanation. Is there an implication here that if you had a more accurate external 4MHz source you could switch it in when you run CAL PLL to get a more accurate result in the look-up table? Mike VK1KCK -- Message: 29 Date: Thu, 25 Nov 2004 20:03:33 -0800 From: "Ron D'Eau Claire" <[EMAIL PROTECTED]> Subject: RE: [Elecraft] VCO relationship with 4 Mhz ocsillator To: 'Jean-Fran?ois M?nard' <[EMAIL PROTECTED]> Cc: 'Elecraft - Maling List' Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1" That's not the case for the 4 MHz oscillator in the K2, Jean-Frangois. -snip-- When you run CAL PLL, a frequency counter built into the K2 measures the PLL frequency. The K2 applies a tuning voltage to the PLL reference oscillator and notes the frequency measured by the counter. This information is recorded in memory so it can be looked up later. The K2 tunes through the whole range of frequencies the PLL can cover noting the actual frequency measured at regular intervals, and then recording the voltage applied to the reference that will produce the frequency. -snip-- Notice that the accuracy of the readout depends upon how accurately the frequencies and tuning voltages were stored when you ran CAL PLL. That's where the 4 MHz clock and C22 come in. The Control Board 4 MHz clock is the time base for the frequency counter! So the closer it is to 4 MHz the more accurately the K2 will measure the K2 PLL frequency and the more accurately the dial calibration of the K2 will be in use. Ron AC7AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Some Questions re Constructing KPA100
Hi All, The last 10 months have flown by settling back into Australia after 4 years in Seattle. At last I have found time to work on the KPA100 that I bought just before I left the US. I have the following few quick comments/questions that I'm hoping someone can confirm/answer (I have a few other questions re parts that I'll send direct to Elecraft): 1 - My SSB MCU is version 1.04. Instructions call for later than version 1.06 (a later version wasn't supplied and I'll talk to Elecraft about that). The question is how essential is a later version and why? 2 - I'm assuming that once you get through the initial construction steps and have installed the new Control Board MCU (In my case version 2.03D replacing version 2.01H) that you can leave the new one in and use the K2 while you continue construction. Is this true? 3 - Also, I read somewhere that all settings are saved in the PROM, so I assume I don't have to re-calibrate anything once the new MCU is installed - is this true? 4 - I received an updated K2IOC (version 1.07). My K2 has a version 1.02. I can't find reference to installing the new K2IOC in the KPA assembly instructions. I assume that I can just install it. Is this true? What extra utility does it provide? 5 - I'm planning to install KPA in external EC2. Should I first install and test it installed in the K2 or are there steps that I can avoid and go straight to installation into the EC2? Cheers Mike VK1KCK ex AC7MZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Logger 32 and A Networked K2
Hi, I was quite pleased to see that there were a few other K2 owners using Logger32. I searched and tried a few of the freeware loggers for a while before settling on Logger32. It seems to have a similar development model to the K2 - a group of enthusiasts who work together to develop and improve it. For some time now I have been contemplating how to network my K2. A Google enabled search has revealed that there are now several Ethernet to RS-232 converters available on the market including one that has wi-fi ethernet. The price for a standard converter is still high and $US180 was the lowest I found, but this is still cheaper than a dedicated PC. Also, the Taiwanese are now starting to make them, so the price is bound to fall. The wi-fi model is amazing because it opens up the possibility that I could sit anywhere in my house or garden and remotely drive my K2 certainly with ease for say PSK. However, I still have to confirm the legaility of doing this in Australia, and I'm not sure about the USA. Some of the converter companies provide software that somehow redirects commands sent from your PC, normally to a serial COM port to which the K2 is attached, to a TCP/IP address of your choosing ie one that you would specify for the now ethernet connected K2. My first question is: Can any one explain how translation from a serial COM port to an ethernet address works? I guess that in time, people writing software to control K2s will start to build in the option for you to specify a TCP/IP address as well as an RS-232 COM port. My second question is how would I go about taking voice from say a headset and sending it from my PC to an ethernet remoted K2? By the way, I'm now back in Australia and looking forward to demonstrating my trusty K2. I'm giving a presentation to the local club at the end of June on my experience with Amateur Radio in the USA where I hope to do a quick demo of the K2 and then give a dedicated K2 talk as a follow up later on. 73s Mike VK1KCK AC7MZ K2#2599 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
