[Elecraft] K2 TX Excessive Low Frequency Audio Response
Hi, There seems to be some confusion about ways to improve the K2 transmit audio. To get the best results it is necessary to make sure that all parts of the transmit chain are optomised. 1) Use a good microphone (not necessarily the most expensive), that has a well defined frequency response, and suits your voice. You can verify this off-air by using a tape recorder or Windows audio recorder. 2) Accurately align the KSB2 filters. This procedure has been described many times on this forum, and in the Builders help pages. Use Spectrogram or WaveSpectra programs (both free) and spend some time getting the received frequency response correct. The 300Hz point on both USB and LSB should be -3dB down. Make sure that you are happy with the result, and that your friends do not sound like Martians ! 3) Listen to your SSB on another receiver with the K2 on dummy load, and the transmit power turned right back. The problem with this method is that if you use headphones they will have their own frequency response that will colour your impression of the transmitted signal. Better still get someone on-air who knows your voice, and can give you accurate feedback to listen . 4) It is possible that the transmission may sound boxy and rather lacking in highs. If your K2 sounds perfect on receive then LEAVE THE FILTER SETTINGS ALONE. The problem is an TX audio one not an RF one. ALL elements in the transmit chain contribute to the quality of the audio, not just the filters settings. Have a look at this page on my web site. http://homepages.nildram.co.uk/~baker/K2_SSB_Mods_Overview.html If you really want to be adventurous you can download (free) from http://audio.rightmark.org/index_new.shtml and plot the actual audio response of your KSB2. So in summary, to get the frequency response right:- a) Your voice (can't do much about that !) b) Mic with tailored frequency response. c) Accurately align the KSB2 filters on receive USB LSB d) Listen to the result, and get reports e) If lacking in top or too muffled, change coupling capacitors. Hope that helps.. Very Merry Christmas to all. 73 Stewart G3RXQ ___ 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] K3 - A thought on firmware requests
Hi all, Just a thought for you Wayne. Would it be possible to have a page (yes, i know, another page!) Where the features to be added are listed? Sort of like Bugzilla? That might cut down the double requests etc that we see for some things. It might also provide a focus on some requests that could be combined or maybe something requested could be done another way to merge requests? I know you will have your own list but it could prove useful. 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC DX Cluster Member RSGB, GQRP K2 #4044 |K3 #? ___ 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] UK addresses blocked ?
Thats news to me. I get TWO copies of the Elecraft Digest and ONE copy of the Elecraft_K3 Digest. Not sure how I get two copies of the regular Digest, but at a guess I'm on the mailing list twice. I keep one copy of each Digest, now totalling 61mB. So blocked I certainly am not !!! Happy Christmas to one and all - my main present (from me to me) is K3/100 #107 which has already been opened, assembled and is in the shack to be played with -- whenever I can sneak a few minutes away from other more seasonal chores. John G3JAG ___ 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] Xmas
Hello All, A Merry Xmas and also an Happy New Year 2008 for all the team in Aptos, with many many thanks for the super work done along 2007, specialy your accessibility for help other topics than the K3 distribution. Just go along in 2008 and further! F5UL, Robert Drogoul K2 #4498 - KPA100/KAT100 ARRL - Ref-Union ___ 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] K3/100 #137 has arrived in Toronto Canada
Hi, Tony: Congrats on your new rig! You will be very pleased, I am sure. For the record, I think the marking of Elecraft boxes for shipment to Canada has been sorted out. The same thing happened to me and I followed up with Lisa after I got mine out of Canada Customs. The most recent package I got from Aptos did have the requisite Amateur Radio text on there, and no problem this time. Elecraft is aware of the problem and has fixed it, best I can tell. 73, Gary, VE1RGB - Original Message - From: Tony Fegan VE3QF [EMAIL PROTECTED] To: elecraft@mailman.qth.net Cc: Lisa Jones - Elecraft Sales [EMAIL PROTECTED] Sent: Saturday, December 22, 2007 1:33 AM Subject: [Elecraft] K3/100 #137 has arrived in Toronto Canada Factory assembled K3/100 was ordered 1 May 2007. Received 21 Dec in Toronto Canada. It was shipped 19 Dec by UPS Worldwide Express and was held up in customs for a few hours and thus missed its scheduled delivery (20 Dec). It seems that this customs officer had assumed that VE3QF was a business and that there should be some duty charged. I explained to UPS (the broker) that it was a shipment to a private person and the contents consisted of Amateur radio equipment. I also quoted a customs tariff number (8527.39.10.00). That may be an old number but in the end the K3 was cleared. I did not see any reference to Amateur radio equipment or any customs declaration form on the box. This could have been removed by customs but usually a copy is kept with the shipment. I unfortunately don't have much experience with customs clearance. I would suggest that the call-sign be put after the name and not on a separate line. For Canada the key words are Amateur radio equipment. This means duty free. The radio was double boxed and arrived in perfect condition. First impression is very positive and definitely worth the wait. I had good reports on our 10M net. My thanks to the Elecraft team. Merry Christmas and a successful New Year. 73 Tony Fegan VE3QF ___ 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 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: External automatic antenna tuner (and TUNE power setting)
Would that be the Clone Kit version sir , or the ready made version? On 22/12/07 01:43, wayne burdick [EMAIL PROTECTED] sent: I'm trying really hard to do everything at once; someone recommended cloning. Anyone having expertise in this area should contact me directly. Do I get a per-unit discount if you can clone me twice? (Oh, also Eric and Lyle :) -- Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it. -Mark Twain, author and humorist (1835-1910) ___ 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] Noise Reduction parameters
Can someone enlighten me about setting up the NR parametershope I can explain myself ok! Holding ADJ brings up (at vfo B position) - NR F#-* where * is from 1 to 4 for each value of # and is adjusted with vfo B knob and clearly increase the degree of noise reduction. As you continue to rotate vfo B knob, # cycles from 1 to 4 but there doesn't appear any discernible difference for each value of #. Can't find any reference in the manual so curiosity has driven me here.; did wonder at first if NR settings were per filter but there are 5 filter positions and in K3 0145 just 3 filters so that theory is out the window. Having said all that the noise reduction works a real treat. 73, Stewart Rolfe, GW0ETF -- View this message in context: http://www.nabble.com/Noise-Reduction-parameters-tp14469896p14469896.html Sent from the Elecraft mailing list archive at Nabble.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] K3 Noise Reduction parameters
Stewart You need to wait a couple of seconds for the change to be implemented. I am using F2-3 on CW and find it quite good to reduce some of the band noise. 73 Dave, G4AON K3/100 #80 = Can someone enlighten me about setting up the NR parametershope I can explain myself ok! Holding ADJ brings up (at vfo B position) - NR F#-* where * is from 1 to 4 for each value of # and is adjusted with vfo B knob and clearly increase the degree of noise reduction. As you continue to rotate vfo B knob, # cycles from 1 to 4 but there doesn't appear any discernible difference for each value of #. Can't find any reference in the manual so curiosity has driven me here.; did wonder at first if NR settings were per filter but there are 5 filter positions and in K3 0145 just 3 filters so that theory is out the window. Having said all that the noise reduction works a real treat. 73, Stewart Rolfe, GW0ETF ___ 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] last ditch effort
Hey Leo, you're perfect Q5 into VT this morning (ah, the magic of e-mail). Glad you didn't give up too soon. This list is a great group of folks! Merry Christmas to you as well! - Keith N1AS - - K2 5411.ssb.100 - - K3 Wave 3 - I'm a K3 wannabe who's tried for some time to post and never can get through. Before throwing in the towel I thought I'd try one more time with my latest setting changes in my email program. ___ 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] Noise Reduction parameters
Can someone enlighten me about setting up the NR parametershope I can explain myself ok! The NR has changed with time and may continue to do so. As a result, the manual is general in its treatment. The overall rule is more is more. NR is more properly Signal Enhancement rather than Noise Reduction. The distinction is subtle but important if you wish to understand how it works and how to best apply it. If ti were noise reduction, the implication is that it passes everything until it figures out what is more likely to be noise, which it then attempts to suppress. Since it is signal enhancement, it tends to pass nothing until it figures out that which is more likely signal, which it then attempts to pass. With this understanding there is one more concept I must explain: correlation. This is the degree to which a signal is similar to itself; conversely, it can be used to figure out how noise is dis-similar to itself (more random). This is the basis on which NR works. In the current implementation of the K3, we have four (4) basic NR filters. These are displayed as F1..F4. F1 is the gentlest, F4 the most aggressive. Recalling that the filters tend to suppress everything until they can sort out what is probably a signal, there is some time delay involved in their application. Further, especially with voice signals, some components of the signal may not be recognized as well as others. THis gives rise to distortion. So, we added a second field to the NR. This is the -1..-4 which specifies a certain amount of bleed through of the original signal. This reduces the apparent distortion and delay, but limits the ultimate S/N improvement. -1 provides the least distortion but limits the S/N improvement on weak to moderate signals to about 6 dB. -4 provides no mixing whatsoever and can result in dramatic S/N improvements, but at a cost of slight time delays and increased distortion. NR is not appropriate for very weak signals, so a -1 or -2 is best if you wish to hear them. Having saids al this, the correct way to use the NR is to listen and adjust it for the best compromise between noise reduction and distortion. Everyone is different in this regard. Some tolerate noise better than others, while some don't tolerate distortion very well at all. I live in a quiet location, and use NR1-2 as my most common setting. This is low in distortion, allows me to hear weak signals, and shows no apparent delay as I tune through the bands. On the rare occasions when things get noisy here, I crank it to higher values. Probably a much longer answer than you wished. Merry Christmas, Lyle KK7P ___ 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] Noise Reduction parameters
Lyle Johnson-6 wrote: Can someone enlighten me about setting up the NR parametershope I can explain myself ok! Probably a much longer answer than you wished. Lyle KK7P Lyle, I for one, very much appreciate the detailed response and description on how NR works. Thanks for the *excellent* work and don't hesitate to give us the *full description*! Chuck, AE4CW ___ 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 - Chuck, AE4CW -- View this message in context: http://www.nabble.com/Noise-Reduction-parameters-tp14469896p14470818.html Sent from the Elecraft mailing list archive at Nabble.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] K3 data mode operation?
I've been trying data with my K3 and find the Data A mode works OK for RTTY (unfortunately with only basic passband filtering from the K3). I was using audio from a sound card fed via the line in socket. When the K3 is set for data mode AFSK A which implies RTTY mode with AFSK (and gives improved dual passband filtering as shown by the filter display), there is no transmit output for audio into the line socket - which worked perfectly when set to Data A. Under advanced operating features (page 31 of the current manual) there is no mention of data transmission, only reception There seems little interest in data via the RS232 lead, currently it doesn't work properly on receive because of mixing frequency and other housekeeping information with the received text. I've not yet tried direct keying on mode FSK D, this might work... Any thoughts on data modes with the K3 in general, or have I just hit features that are still to be implemented with data via RS232 and the AFSK A mode? 73 Dave, G4AON K3/100 #80 ___ 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] Noise Reduction parameters
Lyle Johnson wrote: Probably a much longer answer than you wished. NO!! This is exactly the kind of thing I (for one) want to hear and understand. Would like much more of this kind of technical presentation on the K3's design and operation. Those who don't want this kind of in-depth response can simply delete. Bill W5WVO K3 in February '08 Merry Christmas, Lyle KK7P ___ 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 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] K3 or SDR-5000?
I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 or SDR-5000?
On Sat, 22 Dec 2007, Ross Stenberg wrote: I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? I have not seen (m)any references to SDR-5000 mojo. 73 - k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ 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] K3 Calibration Problem
Hey, Joe. I've just finished #176 and I'm stuck like you were with the ERR TXG while trying to calibrate the transmitter in low power. What did you do to solve the Problem? Many thanks, Steve W0SZ ___ 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] K3 or SDR-5000?
Ross, Did you ask the same question on the Flex forum? John[K7SVV] - Original Message - From: Ross Stenberg [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 11:11 AM Subject: [Elecraft] K3 or SDR-5000? I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1193 - Release Date: 12/22/2007 2:02 PM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 or SDR-5000?
what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? The design philosophy of the two radios is completely different. The Flex-5000 front end is broad as a barn door - it applies all the energy in an entire amateur band and adjacent frequencies directly to the DSP analog to digital converter. This does two things. First the ADC is required to have a much greater dynamic range in order to deal with a 10 to 20 dB larger but very low probability instantaneous peak voltage (very high peak to average ratio). Second it requires the DSP software to sort out all the signals in roughly a 200 kHz window. This results in increased processing time and more delay. The front end of the K3 has a narrow roofing filter very close to the first mixer which limits the bandwidth applied to the DSP ADC. This provides two advantages. The peak to average ratio of the signal applied to the ADC is not a high so the dynamic range of the ADC can be better used (better optimized to conditions) which theoretically provides better dynamic range (either better sensitivity or more resistance to IMD). Secondly, by dealing with a more narrow spectrum, the DSP can be made faster for equivalent resolution (selectivity) or the available processing power/time can be used for improved performance like, noise reduction/signal correlation, context and focus filtering, spatial processing, etc. The Flex philosophy has an advantage in that it can implement in-band dual receive with a single set of receiver hardware. Its DSP can demodulate any signal within the 196 KHz window and provide one signal on each audio channel. With a multi-channel audio card or multiple audio cads and enough computing power, the Flex can be extended to n-channel receive without additional hardware. The K3 design is limited to a single signal per DSP channel. Both design philosophies have their place. The K3 is like a high performance sports car - it does one thing and does it better than any other product. The Flex-5000 is like a fully loaded luxury SUV - it has every option imaginable but it lacks precision, handling and speed. Your choice depends on whether you want frills or performance. 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ross Stenberg Sent: Saturday, December 22, 2007 1:12 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] K3 or SDR-5000? I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 or SDR-5000?
Hi Ross, I own a SDR-1000 for just over a year now. Last May I sold my K2 and ordered a yet to be delivered K3. Until the various tests have been published by the ARRL and Mr. Sherwood, I would say the K3 vs. SDR-5000 are a close match. The K3 will cost less than the SDR-5000 when you add the cost of the required high powered computer to the cost of the SDR-5000. The K3 needs no computer to operate. The SDR-1000/5000 have a panadapter display with the ability to tune in any signal with just a click of a mouse. No big deal unless you become used to it as I have. When software becomes available to mouse click tune the K3 with some sort of panadapter display, My SDR-1000 will be up for sale and a second K3 will be ordered. Until then, I will keep it along with my yet to be delivered K3 and will use which ever rig is the right one for a given situation. Dave, K8AA - Original Message - From: Ross Stenberg [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 1:11 PM Subject: [Elecraft] K3 or SDR-5000? I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1192 - Release Date: 12/21/2007 1:17 PM ___ 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] K3 or SDR-5000?
It is here now I believe, in the latest version of SpectraVue s/w supporting the SDR-14 or SDR-IQ and a K3. http://www.rfspace.com/Home.html Ben W4SC - Original Message - From: Dave Larson [EMAIL PROTECTED] To: Ross Stenberg [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 3:05 PM Subject: Re: [Elecraft] K3 or SDR-5000? Hi Ross, I own a SDR-1000 for just over a year now. Last May I sold my K2 and ordered a yet to be delivered K3. Until the various tests have been published by the ARRL and Mr. Sherwood, I would say the K3 vs. SDR-5000 are a close match. The K3 will cost less than the SDR-5000 when you add the cost of the required high powered computer to the cost of the SDR-5000. The K3 needs no computer to operate. The SDR-1000/5000 have a panadapter display with the ability to tune in any signal with just a click of a mouse. No big deal unless you become used to it as I have. When software becomes available to mouse click tune the K3 with some sort of panadapter display, My SDR-1000 will be up for sale and a second K3 will be ordered. Until then, I will keep it along with my yet to be delivered K3 and will use which ever rig is the right one for a given situation. Dave, K8AA - Original Message - From: Ross Stenberg [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 1:11 PM Subject: [Elecraft] K3 or SDR-5000? I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1192 - Release Date: 12/21/2007 1:17 PM ___ 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 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] K3 data mode operation?
Dave, For now, when using AFSK mode only use the 915 pitch setting. If you do that it will work fine. Sorting the text from the serial port is on the list. 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dave G4AON Sent: Saturday, December 22, 2007 8:50 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 data mode operation? I've been trying data with my K3 and find the Data A mode works OK for RTTY (unfortunately with only basic passband filtering from the K3). I was using audio from a sound card fed via the line in socket. When the K3 is set for data mode AFSK A which implies RTTY mode with AFSK (and gives improved dual passband filtering as shown by the filter display), there is no transmit output for audio into the line socket - which worked perfectly when set to Data A. Under advanced operating features (page 31 of the current manual) there is no mention of data transmission, only reception There seems little interest in data via the RS232 lead, currently it doesn't work properly on receive because of mixing frequency and other housekeeping information with the received text. I've not yet tried direct keying on mode FSK D, this might work... Any thoughts on data modes with the K3 in general, or have I just hit features that are still to be implemented with data via RS232 and the AFSK A mode? 73 Dave, G4AON K3/100 #80 ___ 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 No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1193 - Release Date: 12/22/2007 2:02 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1193 - Release Date: 12/22/2007 2:02 PM ___ 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] Fw: Sudden erratic power/high current problems with K2
After some investigation I found that the braid of the coax for the Aux RF had frayed at the KPA100 board to just a couple of strands. Hoping this was the problem I repaired it but no change. This all seems to be caused by the K2 power control being all or none with no intermediate settings. In low power as I turn the knob clockwise it goes from minimal power to full QRP of about 12 watts suddenly and when the high power comes on it jumps to full output. How do I approach this problem? Is it ALC related? - Original Message - From: Bill Carpenter [EMAIL PROTECTED] To: elecraft list elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 12:38 PM Subject: Sudden erratic power/high current problems with K2 I'll try to keep this short. I was operating with my K2/100 with KAT100 today and everything was fine. I changed bands and initiated tune on the KAT100 and it did not operate properly. The SWR leds went a little bonkers and it did not want to settle on a low SWR. I disabled it by going to CAL and then I noticed that even though the K2 power meter was showing about 2/3 scale I was getting full output on my outboard SWR meter. I then took the KAT100 out of the loop by disconnecting it fully from the K2. Now I am seeing very high power output of around 140 - 150 watts on the lower bands such as 160, 80, 60, 30, 40 and 20 with more normal power output on the upper bands but I'm still seeing high current indication on all bands. In addition the power control on the K2 is not working in a linear fashion. As I increase it from the lowest setting it is OK until the KPA100 kicks in when it suddenly goes to full output. I have not ever seen this happen in the 15 months since I built the rig or in the 2 weeks since I built the KAT100 - everything has been fine. Now all of a sudden I have all this erratic behavior. As I said I added the KAT100 2 weeks ago but there have been no problems at all until now. Any and all help/suggestions are very welcome!! 73, Bill NZ0T ___ 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] Fw: Sudden erratic power/high current problems with K2
Bill, That is classic behavior when the KPA100 wattmeter diodes are zapped. Since the most common failure cause is a static (lightning) surge from the antenna, you may want to consider replacing the ones in the KAT100 at the same time. The diodes are 1N5711s and in the KPA100 are D16 and D17 (near the SO239 jack), and the diodes in the KAT100 are D1 and D2. As explanation for the behavior, the K2 power control loop senses power at the output with the wattmeters - if there is zero power out reported, the controls drive harder - so you have a base K2 trying to drive as hard as possible and the resulting output power is the maximum that can be produced on any given band. In other words, the wattmeter must be working for the K2 to control the output power - that is the sensing element. 73, Don W3FPR Bill Carpenter wrote: After some investigation I found that the braid of the coax for the Aux RF had frayed at the KPA100 board to just a couple of strands. Hoping this was the problem I repaired it but no change. This all seems to be caused by the K2 power control being all or none with no intermediate settings. In low power as I turn the knob clockwise it goes from minimal power to full QRP of about 12 watts suddenly and when the high power comes on it jumps to full output. How do I approach this problem? Is it ALC related? ___ 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] K3 or SDR-5000?
If you are looking for a cheaper solution ($12 softrock) K3 IF and Scott's (WU2X) Modified PowerSDR software you have a 160-6m fully functional panadapter that tracks the rigs VFO :) Http://www.wu2x.com/sdr.html Youtube movie demo in the works. 73 Lee WW2DX On Dec 22, 2007, at 3:13 PM, W4sc [EMAIL PROTECTED] wrote: It is here now I believe, in the latest version of SpectraVue s/w supporting the SDR-14 or SDR-IQ and a K3. http://www.rfspace.com/Home.html Ben W4SC - Original Message - From: Dave Larson [EMAIL PROTECTED] To: Ross Stenberg [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 3:05 PM Subject: Re: [Elecraft] K3 or SDR-5000? Hi Ross, I own a SDR-1000 for just over a year now. Last May I sold my K2 and ordered a yet to be delivered K3. Until the various tests have been published by the ARRL and Mr. Sherwood, I would say the K3 vs. SDR-5000 are a close match. The K3 will cost less than the SDR-5000 when you add the cost of the required high powered computer to the cost of the SDR-5000. The K3 needs no computer to operate. The SDR-1000/5000 have a panadapter display with the ability to tune in any signal with just a click of a mouse. No big deal unless you become used to it as I have. When software becomes available to mouse click tune the K3 with some sort of panadapter display, My SDR-1000 will be up for sale and a second K3 will be ordered. Until then, I will keep it along with my yet to be delivered K3 and will use which ever rig is the right one for a given situation. Dave, K8AA - Original Message - From: Ross Stenberg [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 1:11 PM Subject: [Elecraft] K3 or SDR-5000? I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1192 - Release Date: 12/21/2007 1:17 PM ___ 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 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 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] Fw: Sudden erratic power/high current problems with K2
I had some 1N4148 diodes in my junkbox so I installed them and all is good again. The diodes in the KAT100 are fine so I'll order a few 1N5711s and replace the 1N4148s when they come in. Thanks again! - Original Message - From: Don Wilhelm [EMAIL PROTECTED] To: Bill Carpenter [EMAIL PROTECTED] Cc: elecraft list elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 3:17 PM Subject: Re: [Elecraft] Fw: Sudden erratic power/high current problems with K2 Bill, That is classic behavior when the KPA100 wattmeter diodes are zapped. Since the most common failure cause is a static (lightning) surge from the antenna, you may want to consider replacing the ones in the KAT100 at the same time. The diodes are 1N5711s and in the KPA100 are D16 and D17 (near the SO239 jack), and the diodes in the KAT100 are D1 and D2. As explanation for the behavior, the K2 power control loop senses power at the output with the wattmeters - if there is zero power out reported, the controls drive harder - so you have a base K2 trying to drive as hard as possible and the resulting output power is the maximum that can be produced on any given band. In other words, the wattmeter must be working for the K2 to control the output power - that is the sensing element. 73, Don W3FPR Bill Carpenter wrote: After some investigation I found that the braid of the coax for the Aux RF had frayed at the KPA100 board to just a couple of strands. Hoping this was the problem I repaired it but no change. This all seems to be caused by the K2 power control being all or none with no intermediate settings. In low power as I turn the knob clockwise it goes from minimal power to full QRP of about 12 watts suddenly and when the high power comes on it jumps to full output. How do I approach this problem? Is it ALC related? ___ 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] Fw: Sudden erratic power/high current problems with K2
Bill, All will be well as long as you give some liberty to the requested vs. actual power output while you have the 1N4148 diodes in there - the 1N5711s are pretty flat with respect to voltage vs. frequency. Glad to hear you now have a handle on things again. 73, Don W3FPR Bill Carpenter wrote: I had some 1N4148 diodes in my junkbox so I installed them and all is good again. The diodes in the KAT100 are fine so I'll order a few 1N5711s and replace the 1N4148s when they come in. Thanks again! - Original Message - From: Don Wilhelm [EMAIL PROTECTED] To: Bill Carpenter [EMAIL PROTECTED] Cc: elecraft list elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 3:17 PM Subject: Re: [Elecraft] Fw: Sudden erratic power/high current problems with K2 Bill, That is classic behavior when the KPA100 wattmeter diodes are zapped. Since the most common failure cause is a static (lightning) surge from the antenna, you may want to consider replacing the ones in the KAT100 at the same time. The diodes are 1N5711s and in the KPA100 are D16 and D17 (near the SO239 jack), and the diodes in the KAT100 are D1 and D2. As explanation for the behavior, the K2 power control loop senses power at the output with the wattmeters - if there is zero power out reported, the controls drive harder - so you have a base K2 trying to drive as hard as possible and the resulting output power is the maximum that can be produced on any given band. In other words, the wattmeter must be working for the K2 to control the output power - that is the sensing element. 73, Don W3FPR Bill Carpenter wrote: After some investigation I found that the braid of the coax for the Aux RF had frayed at the KPA100 board to just a couple of strands. Hoping this was the problem I repaired it but no change. This all seems to be caused by the K2 power control being all or none with no intermediate settings. In low power as I turn the knob clockwise it goes from minimal power to full QRP of about 12 watts suddenly and when the high power comes on it jumps to full output. How do I approach this problem? Is it ALC related? ___ 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 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] K3 or SDR-5000?
Anyone have pictures of a panadapter / softrock setup with a K3? - David Wilburn [EMAIL PROTECTED] K4DGW K2 S/N 5982 On Sat, 2007-12-22 at 16:51 -0500, Lee (WW2DX) wrote: If you are looking for a cheaper solution ($12 softrock) K3 IF and Scott's (WU2X) Modified PowerSDR software you have a 160-6m fully functional panadapter that tracks the rigs VFO :) Http://www.wu2x.com/sdr.html Youtube movie demo in the works. 73 Lee WW2DX On Dec 22, 2007, at 3:13 PM, W4sc [EMAIL PROTECTED] wrote: It is here now I believe, in the latest version of SpectraVue s/w supporting the SDR-14 or SDR-IQ and a K3. http://www.rfspace.com/Home.html Ben W4SC - Original Message - From: Dave Larson [EMAIL PROTECTED] To: Ross Stenberg [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 3:05 PM Subject: Re: [Elecraft] K3 or SDR-5000? Hi Ross, I own a SDR-1000 for just over a year now. Last May I sold my K2 and ordered a yet to be delivered K3. Until the various tests have been published by the ARRL and Mr. Sherwood, I would say the K3 vs. SDR-5000 are a close match. The K3 will cost less than the SDR-5000 when you add the cost of the required high powered computer to the cost of the SDR-5000. The K3 needs no computer to operate. The SDR-1000/5000 have a panadapter display with the ability to tune in any signal with just a click of a mouse. No big deal unless you become used to it as I have. When software becomes available to mouse click tune the K3 with some sort of panadapter display, My SDR-1000 will be up for sale and a second K3 will be ordered. Until then, I will keep it along with my yet to be delivered K3 and will use which ever rig is the right one for a given situation. Dave, K8AA - Original Message - From: Ross Stenberg [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Saturday, December 22, 2007 1:11 PM Subject: [Elecraft] K3 or SDR-5000? I realize that this is like asking a pack of dogs if they like bacon, but what do you think other than the obvious differences (knobs, bandscope, computer, $$, etc.) K3 or SDR-5000? 73 and Merry Christmas Ross Stenberg K9COX ___ 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.6/1192 - Release Date: 12/21/2007 1:17 PM ___ 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 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 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 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] K3 KBPF3 Benefits without SubReceiver?
I am thinking about what future options to order for my K3. I do not plan to get the KRX3 Subreceiver. So, what benefit would it be to get the KBPF3 General Coverage RX Filter Module? Since this mounts on the RF board over the ham band bandpass filters, will this impact the performance while in the ham bands? A KBPF3 can be mounted on either or both the main receiver and KRX3. It functions the same in each receiver and adds the band pass filters to cover the frequencies outside the Ham bands. The benefit is allowing reception outside the Ham bands. There is no performance impact in the Ham bands with the KBPF3 installed. It is out of the circuit and not used inside the Ham bands. 73, Ed - W0YK ___ 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] K3 KBPF3 Benefits without SubReceiver?
... what benefit would it be to get the KBPF3 General Coverage RX Filter Module? ... will this impact the performance while in the ham bands? The KBPF3 is switched into the signal path instead of the ham-band bandpass filters when you tune the K3 outside the ham bands. When you are tuned inside the ham bands, it is bypassed and the standard ham-band filters are used. There is no practical degradation of ham-band performance, and greatly enhanced reception when outside the ham bands. I use mine regularly! Merry Christmas, Lyle kK7P ___ 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] K3 KBPF3 Benefits without SubReceiver?
Kyle, et al, Thanks for the quick responses. OK, it looks like the KBPF3 turns the K3 into a general coverage receiver without having to order the SubReceiver option. That sounds like a reasonable option to have to allow listening to the CB/FRS bands :-) My concern about the mounting location is the affect of the KBPF3 circuit board with similar tuned circuits in such close proximity to the ham band tuned circuits. The affect may be subtle and only detectable in unusually strong signal situations. I just do not want to add something that could slightly reduce the K3's performance in the ham bands. Instead, I can buy a good used separate 0.5 - 30 MHz receiver for SWBC coverage for the same price as the KBPF3. 73, Henry - K4TMC -Original Message- From: Lyle Johnson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Sat, 22 Dec 2007 10:17 pm Subject: Re: [Elecraft] K3 KBPF3 Benefits without SubReceiver? ... what benefit would it be to get the KBPF3 General Coverage RX Filter Module? ... will this impact the performance while in the ham bands? The KBPF3 is switched into the signal path instead of the ham-band bandpass filters when you tune the K3 outside the ham bands. When you are tuned inside the ham bands, it is bypassed and the standard ham-band filters are used. There is no practical degradation of ham-band performance, and greatly enhanced reception when outside the ham bands. I use mine regularly! Merry Christmas, Lyle kK7P More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.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
Re: [Elecraft] Fw: Sudden erratic power/high current problems with K2
Jeff, I have never encountered an intermittent diode, but of course soldering problems can create an intermittent. Also, you might have an oscillation that is creating that behavior - it is difficult to say if you are only looking at the output power - the actual frequency of the output would reveal whether it is a parasitic oscillation or just a power control intermittent. One of the clues is that a parasitic oscillation will usually not show up when working into a dummy load because the dummy load is not frequency sensitive - when working into an antenna and/or an antenna tuner, a parasitic will show up with a high SWR indication because the load is frequency sensitive. If your KPA100 was purchased before Nov 2006, it does not have the newer T/R switch design, and you should upgrade it with KPA100UPKT. If you have already done that, be certain that C31 was changed to a 0.22 uF capacitor with the upgrade. The upgrade kit does not contain the new capacitor for C31 - you must request one separately from [EMAIL PROTECTED] There are steps in process to include the new C31 with the KPA100UPKT, but it is not yet complete. 73, Don W3FPR Jeff Kinzli N6GQ wrote: Don, would this behavior (of zapped wattmeter diodes) be intermittant, or constant? I have been chasing an intermittant high-output and erratic output problem for a while...just wondering if this might be my problem? Are these diodes particularly ESD-sensitive? Thanks, Jeff N6GQ ___ 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] K3 KBPF3 Benefits without SubReceiver?
k4tmc wrote: Instead, I can buy a good used separate 0.5 - 30 MHz receiver for SWBC coverage for the same price as the KBPF3. Instead, you can take an SDR-IQ and use it as HF-RX. When not after BC, it can serve as a band scope for K3. Benny OH9NB ___ 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 CW Net Announcement
Good Evening, We have made it past the bottom it seems. There was a sunspot of reverse polarity this week which is said to signify the beginning of the upward cycle. We have also passed the shortest day of the year. Winter began today though it was hard to tell the difference from the days before. We've been alternating between snow and rain for the last week although the snow portion of the cycle has changed by staying longer more frequently. Currently there are about two inches on the ground with more coming tomorrow. Propagation on twenty was better this week than last but QSB persists. Forty meters has been said to be rough but we can work through that by sticking with the time we used last week. Moving forty earlier helped a great deal; I was able to work a few Californians directly. However, Tom should be around on both nets because he was able to locate the truncated dipole's center and splice on a new leg. Hopefully you are well prepared for next Tuesday. I used up a pile of ingredients Pat had purchased in preparation for Christmas 2005. I now have three batches of Mamie Eisenhower's Million Dollar fudge. What I am going to do with it is still in limbo but it used up most of the ingredients. One more batch should rid me of the overload of chocolate she left me. UPS or USPS will be shipping off many pounds of it to places east of here. As long as it gets out of the house I'll be fine :) Please join us tomorrow evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Sunday 2300z (Sunday 3 PM PST) 14050 kHz Monday 0100z (Sunday 5 PM PST) 7045 kHz Stay warm, Kevin. KD5ONS ecn.visionseer.com for net details ___ 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] K3 KBPF3 Benefits without SubReceiver?
It doesn't degrade the K3 performance in any way. The KBPF3 simply adds the right input circuits to maintain full sensitivity across the entire tuning range. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Saturday, December 22, 2007 7:53 PM To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 KBPF3 Benefits without SubReceiver? Kyle, et al, Thanks for the quick responses. OK, it looks like the KBPF3 turns the K3 into a general coverage receiver without having to order the SubReceiver option. That sounds like a reasonable option to have to allow listening to the CB/FRS bands :-) My concern about the mounting location is the affect of the KBPF3 circuit board with similar tuned circuits in such close proximity to the ham band tuned circuits. The affect may be subtle and only detectable in unusually strong signal situations. I just do not want to add something that could slightly reduce the K3's performance in the ham bands. Instead, I can buy a good used separate 0.5 - 30 MHz receiver for SWBC coverage for the same price as the KBPF3. 73, Henry - K4TMC -Original Message- From: Lyle Johnson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Sat, 22 Dec 2007 10:17 pm Subject: Re: [Elecraft] K3 KBPF3 Benefits without SubReceiver? ... what benefit would it be to get the KBPF3 General Coverage RX Filter Module? ... will this impact the performance while in the ham bands? The KBPF3 is switched into the signal path instead of the ham-band bandpass filters when you tune the K3 outside the ham bands. When you are tuned inside the ham bands, it is bypassed and the standard ham-band filters are used. There is no practical degradation of ham-band performance, and greatly enhanced reception when outside the ham bands. I use mine regularly! Merry Christmas, Lyle kK7P More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.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 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
