Re: [Elecraft] Sherwood Engineering Tests
I guess I have an old K3 s/n 2145. No upgrades, no new DSP, and I have great audio, no audio problems, no fatigue from listening. I work every QRP fox I look for and using the built-in speaker. Maybe I got lucky in my K3 build. 73 Joe KK5NA -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe W2KJ Sent: Tuesday, February 24, 2015 1:58 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests Howdy Gang: I can certainly attest to the fact that the audio in the K3 is very much improved over early serial numbers. I purchased a K3 way back when...s/n 284 I believe. After listening to the radio for about 20 minutes I got fatigued by the audioI only kept the radio a few months and sold it. A few years and several thousand serial numbers later...I purchased a new K3, s/n 44XX, and the audio was greatly improved and was a joy to listen to...I still have the rig but it's been gathering dust since I just love my KX3!! Elecraft simply doesn't follow the YaeComWood philosophy of making improvements to their rigs by selling the Pro or ProII, Pro III etc forcing you to sell your current rig and buying the new and improved rig. Elecraft does it the right way and maintains a solid customer base because of their philosophy of users being able to upgrade their rigs and stay current in terms of capability and functionality. 73, Joe W2KJ I QRP, therefore I am __ 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 kk...@kk5na.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] Sherwood Engineering Tests
My K3/10 (SN 4043) was purchased on 3/5/2010 (per the invoice). I'm sure that I have the new DSP board and KXV3A. I know that it includes the improved gain in the 1st IF. I have not installed any upgrades other than the EXREF and firmware updates. It has three filters: 13/2.8/400 in main Rx and 2.8 in sub-Rx (KRX3). It has KBPF3 and KTCXO3-1. I installed a minor HB modification to bring the sub-Rx IF out to a BNC connector. I do not use the internal speaker that seems a little harsh to me. I am using a very old ten inch National Speaker from the 1950's that many might say is too mellow. Sound is fine using my SONY stereo headset which has wider frequency response than the radio. Another couple weeks and my K3 will be five years old. 73, Ed - KL7UW From: Wayne Burdick n...@elecraft.com To: George Dubovsky n4ua...@gmail.com Cc: Elecraft Reflector elecraft@mailman.qth.net, Wes \(N7WS\) w...@triconet.org Subject: Re: [Elecraft] Sherwood Engineering Tests Message-ID: 9aac73a0-9b20-4ae3-acb9-fb4045b16...@elecraft.com Content-Type: text/plain; charset=utf-8 Hi George, I just checked the web site and I see that we've been shipping K3s with the new DSP board since sometime in 2010. (Confirming that time flies.) You can upgrade the DSP board from rev. C to rev. D for $109 (K3DSPUPGD); this includes both the audio low-pass filter and a bit of an improvement in LF audio response. Or you can add just the audio filter section as a small daughter board for $39 (K3DSPLPF). The upgrade does improve the spectra as viewed on an audio spectrum analyzer, but many operators won't be able to hear the effects by ear. Those who can hear them have told us it was a major improvement. Wayne N6KR 73, Ed - KL7UW http://www.kl7uw.com Kits made by KL7UW Dubus Mag business: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Sherwood Engineering Tests
Thumbs up to Elecraft for keeping on top of good performance. Perhaps someone will come up with and share a user modification for those who might want to explore the potential enhancement as suggested below. Best regards, Dick - KA5KKT While it is possible to reduce audio IMD products even further, this typically requires a class-A final audio output stage, which would add perhaps 0.5 to 1.0 amps of additional receive-mode current drain (and an associated heatsink). - Wayne __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] OT: THP HL-1.5KFX amplifier for sale/trade
Some months ago I received a TOKYO HY-POWER HL-1.5KFX amplifier from Array Solutions. This was shortly before Elecraft announced the KPA500 and (of course) I ordered one to complete my K-Line. (:-)) The THP is new-in-the-box and at the time was valued at a bit over $3K. Now that THP is no longer in business I have no idea of it's value. I'd like to offer it on the Elecraft reflector ... either for sale or perhaps trade for a K3. 73! Ken Kopp - K0PP 406-560-1555 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] FW: Sherwood Engineering Tests
_ From: Chester Alderman [mailto:alderm...@windstream.net] Sent: Tuesday, February 24, 2015 1:59 PM To: 'Yngvi (TF3Y)' Cc: 'Elecraft Reflector' Subject: RE: [Elecraft] Sherwood Engineering Tests Hi Yvgvi, I wonder, given atmospheric noise levels, if that is really going to be noticed by the operator. I seriously doubt It would be noticed in a contest? 73, Tom - W4BQF -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Yngvi (TF3Y) Sent: Tuesday, February 24, 2015 1:26 PM To: elecraft@mailman.qth.net mailto:elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests These are interesting stats. One thing I noticed was the apparent loss in sensitivity as measured by Sherwood. This is probably not a big issue for most these days with the ever increasing noise levels but for the few in silent locations, incl. some DXpeditions this might be an issue. Any comments on this? 73, Yngvi TF3Y http://www.tf3y.net __ 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] Old KSYN3 cards
Don Wilhelm-4 wrote someone with a non-sub K3 who wants to add the subRX without upgrading the KSYN3 in the main RX. Is it possible to order a KRX3 *without* a synthesizer board? If it were, there would certainly be a better market for the old boards. I would be much more likely to upgrade to the new KSYN3 for my two K3's, each with two receivers, if I could recover some of the cost by selling the old synthesizers. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/Old-KSYN3-cards-tp7599211p7599267.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Split operation
On 2/24/15 at 6:04 AM, li...@subich.com (Joe Subich, W4TV) wrote: I thought I was in split with the marker in the P3 dead on where I wanted to transmit. All was set except I hadn't dedicated that AB button to split. Do you have problems seeing red? The P3 will show a RED cursor for the transmit frequency when the K3 is split (or if RTI/XIT is turned on). I managed to transmit on the DX frequency in my early days. (A kindly ham read my QRZ page, realized I was quite new to this kind of operation, and called me on the telephone to do a little elmering. I am still very grateful to him.) I was using the SVGA on my P3 where the difference between red and magenta is somewhat subtle. (If I had looked at the P3 screen, it would have been much more obvious.) 20-20 hindsight says that perhaps the VFO-B cursor should have been yellow, turning to red when in split. There may be even better choices when we consider working for color blind people. 73 Bill AE6JV --- Bill Frantz| Since the IBM Selectric, keyboards have gotten 408-356-8506 | steadily worse. Now we have touchscreen keyboards. www.pwpconsult.com | Can we make something even worse? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 Transmitter Gain Calibration fails
Hello, after updating the firmware to MCU version 5.10 the Transmitter Gain Calibration fails. The error message is: /Elecraft K3 Utility for Linux Revision 1.14.10.24 K3 MCU revision 05.10. RS-232 speed 4800 bps. Starting 5 watt calibration. GetTunePower: Unexpected response '?;' to ''. 5 watt calibration failed. Elapsed time: 6,0 secs/ The same with the 50W Calibration. Where is the problem? 73, Wolfgang DL2KI -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Transmitter-Gain-Calibration-fails-tp7599231.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 Message delivered to arch...@mail-archive.com
[Elecraft] K3 - 630 Meter WSPR
Hello all,I ran the K3 overnight on 630M WSPR driving a homebrew 125 watt powerAmp into 60 ft vertical.My signal was decoded by 35 unique stations and 99 spots from Merv ( WH2XCR - KH6 land) .This stations has been decoded all over the lower 48, Wasilla Alaska , Maunaloa,HI , Canadaand also a few spots from EU.The K3 is preforming very nice on this band with the new synthesizer board.Thanks again Elecraft for a unbeatable rig 73 Ken K5DNL/WG2XXM __ 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] Upgrading to the new Syn Card -- is there a noticable change?
Pete and other interested parties, IMO, yes, it was worth it, but as previously stated by others, it depends on what your operating style/habits are. If you are a casual CW operator and don't really use QSK, you may never notice the changes as they are really subtle to most ears. Most noticeable to me, the switching transitions from RX to TX and back are much cleaner and enough faster that normal QSK without turning QSK mode on will allow you to hear smoothly between dots at 45-50 wpm. Also it's fast enough that the internal keyer's CW weighting sounds like it should rather than having to weight it heavier. I mainly use a bug these days, but the transitions are smooth enough that the harsh switching has been toned down to the point the sidetone sounds very nice and It is so smooth and fast that while I'm sending (at least up to 30 wpm - haven't tried it faster yet) it sounds like the RX never shuts off. With the old synthesizer(s) (I have both receivers) there was a very small hesitation between key down and key up before the RX came back to life. I do not notice that anymore though physically it has to still be there. The much faster switching time makes it more pleasant to someone like me who has used mostly CW and QSK for my whole 50+ years in ham radio. It's almost like having separate transmitters and receivers linked to the same VFO, using separate antennas and no receiver muting, only RF overload protection. (Only way I know to explain it). Your mileage will certainly vary. Jim - W0EB -- Original Message -- From: Peter Chamalian W1RM w...@comcast.net To: 'Elecraft Reflector' elecraft@mailman.qth.net Sent: 2/24/2015 8:00:24 AM Subject: [Elecraft] Upgrading to the new Syn Card -- is there a noticable change? I'd like to hear from CW operators who have upgraded to the new synthesizer boards. Is there a material/noticeable change in the K3 performance? Do you think the upgrade was worth it? Pete, W1RM __ 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 w...@cox.net __ 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] Split operation
I guess I see it as we should be able to just read the screen. Maybe it's because I learned to pay attention to the details while in the Navy (doing push-ups because someone did not pay attention to the little details). You struck on the real problem Far to many rude people today I've been fortunate over the years and I've had a some fellow Hams work with me on the air (when my signal was off etc). That left me with the desire to pass along help and guidance when I could; in a nurturing not condescending manner. Remember it's just a hobby From: Gary Smith g...@ka1j.com To: Elecraft@mailman.qth.net Sent: Tuesday, February 24, 2015 12:38 AM Subject: Re: [Elecraft] Split operation Harry, What you say is true, I can not disagree. I will say that absent-mindedness is the bane of humanity and nobody can remember all the right things to do, all of the time. No matter how hard we like to think of ourselves as doing the perfectly right thing, some incredibly competent person, somewhere, is making a mistake at this moment. Since transmitting on the Dx Tx frequency is one of the deadly sins, creating the extra step to make it not happen is a good thing. Just today I clicked on a RTTY spot I needed, tuned them in on the scope, set the VFO to where I wanted to transmit. All was good... I gave my call 4-5 times till some ass insulted me calling me a name, sending UP UP and then another ass-relative of theirs called me names. I thought I was in split with the marker in the P3 dead on where I wanted to transmit. All was set except I hadn't dedicated that AB button to split. If in my P3 screen I saw the word SPLIT in the waterfall, I would know I was in split. Just having a flashing LED or some 1/2 x 1/4 high below the power button saying SPLIT is just not enough for me to come close to being 100% on this. I suspect most of the honest answers you'd get here says people have made this mistake. I'm for an in your face option to make it clear when you are in split. Don't want it? Don't enable it. Want to be sure? enable it... Gary KA1J The real fix is to just pay attention, and read the screen. I spent years in IT where if people just seemed unable to simply read the screen. It's the same here with the split, people just need to pay attention to what they're doing. From: Ralph Parker ve...@dccnet.com To: Elecraft@mailman.qth.net Sent: Monday, February 23, 2015 3:08 PM Subject: Re: [Elecraft] Split operation Or, we could replace the *entire* VFO A display with the word SPLIT during key-down. This would be even more obvious, and it wouldn't mess up the VFO B display. VFO B is what you care about during split TX. Why not just have the DVR say UP, UP whenever you transmit in split mode. Save wear and tear on the KC Kops. VE7XF __ 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 hlyin...@yahoo.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 g...@ka1j.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 hlyin...@yahoo.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] Split operation
I thought I was in split with the marker in the P3 dead on where I wanted to transmit. All was set except I hadn't dedicated that AB button to split. Do you have problems seeing red? The P3 will show a RED cursor for the transmit frequency when the K3 is split (or if RTI/XIT is turned on). I don't understand why someone would want to lose a significant amount of data displayed in the waterfall when the red transmit cursor is so prominent. 73, ... Joe, W4TV On 2015-02-24 12:38 AM, Gary Smith wrote: Harry, What you say is true, I can not disagree. I will say that absent-mindedness is the bane of humanity and nobody can remember all the right things to do, all of the time. No matter how hard we like to think of ourselves as doing the perfectly right thing, some incredibly competent person, somewhere, is making a mistake at this moment. Since transmitting on the Dx Tx frequency is one of the deadly sins, creating the extra step to make it not happen is a good thing. Just today I clicked on a RTTY spot I needed, tuned them in on the scope, set the VFO to where I wanted to transmit. All was good... I gave my call 4-5 times till some ass insulted me calling me a name, sending UP UP and then another ass-relative of theirs called me names. I thought I was in split with the marker in the P3 dead on where I wanted to transmit. All was set except I hadn't dedicated that AB button to split. If in my P3 screen I saw the word SPLIT in the waterfall, I would know I was in split. Just having a flashing LED or some 1/2 x 1/4 high below the power button saying SPLIT is just not enough for me to come close to being 100% on this. I suspect most of the honest answers you'd get here says people have made this mistake. I'm for an in your face option to make it clear when you are in split. Don't want it? Don't enable it. Want to be sure? enable it... Gary KA1J The real fix is to just pay attention, and read the screen. I spent years in IT where if people just seemed unable to simply read the screen. It's the same here with the split, people just need to pay attention to what they're doing. From: Ralph Parker ve...@dccnet.com To: Elecraft@mailman.qth.net Sent: Monday, February 23, 2015 3:08 PM Subject: Re: [Elecraft] Split operation Or, we could replace the *entire* VFO A display with the word SPLIT during key-down. This would be even more obvious, and it wouldn't mess up the VFO B display. VFO B is what you care about during split TX. Why not just have the DVR say UP, UP whenever you transmit in split mode. Save wear and tear on the KC Kops. VE7XF __ 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 hlyin...@yahoo.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 g...@ka1j.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 li...@subich.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] Upgrading to the new Syn Card -- is there a noticable change?
Hello Pete, It probably depends upon what aspects of CW operation are most important to you. IMHO, the upgrade was well worth it. I posted my comments about it yesterday with the subject line: [K3] New KSYN3A CW timing 73, Dale WA8SRA I'd like to hear from CW operators who have upgraded to the new synthesizer boards. Is there a material/noticeable change in the K3 performance? Do you think the upgrade was worth it? Pete, W1RM __ 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] Sherwood Engineering Tests
I'm sure there's a point here and I just fail to see what it is. Rob has stated many times (look for his videos) that one number does not a radio make. In fact, as best that I know, he doesn't own a K3. Wes N7WS On 2/23/2015 11:01 PM, jim wrote: Guys, Further, pesky, facts on said Real Radio at http://www.sherweng.com/table.html . Number two on the list. That is out of 116 receivers listed on the Sherwood page. That puts said Real Radio in the top 3% of the radios Bob Sherwood has tested for a critical receiver performance parameter. BTW, you will have to use the Page Down button, more than twice, to even get a hint of the Kenwood 590. It is number 20 on the list, putting it in the top 17% Also, important to note, is the Drake R4-C with the Sherwood roofing mod, listed at number 28. The R4-C is *ONLY* 45 (forty five) year old technology and that puts it in the top 23%. Yep, FORTY FIVE year old technology. Yep, top 23 %. Just some further, pesky, facts. Rake P.S. BTW, I learned 45 years ago. This flies in the face of someone's comment that I never learn. Ho Hum, another pesky fact. __ 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] Upgrading to the new Syn Card -- is there a noticable change?
Considering the time and effort to make them happen, all Elecraft upgrades are worth it. Whether you want to own an upgraded radio or a downgraded radio is up to you. Kent K9ZTV On 2/24/2015 8:00 AM, someone wrote: Do you think the upgrade was worth it? __ 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 receive on .474.2 kHz - OT MF Gibson Girls
Go to http://wsprnet.org/drupal/wsprnet/map select MF band (600meters) put in my call WH2XCR and select past 12 hours. You will see first hand what propagation on 600M is like in todays world. Technology has made things a lot different, or leave the call sign field blank and see all the activity on 600M. 73 Merv K9FD/KH6 Some MF propagation variables are illustrated in the miliary manuals for those Gibson Girls (GG). Most were SCR-578/BC-778 units that were 500 kHz A2 only, about 2 watts plate input, connected to a 300-foot wire vertical suspended by kite or balloon and a ground strap dropped into salt-water sea...nominal range was around 300 miles. In fresh water the range was about **10 percent of that**. For land use a 300-foot counterpoise was required and expected range was **5 to 10 miles**. (Very late in WWII the T-74/CRT-3 GG became available, identical to the BC-778 with 8280 kHz A1 HF added. In early 1954 the T-74A/CRT-3A came out with that new 8364 kHz A1 HF output instead.) Unlike the post-war merchant-marine crank-operated lifeboat radios operating on those same frequencies, none of these units had receivers, although in late war some USAAF flights over the Arctic were supplied with a dry-cell battery-powered 200 to 400 kHz receiver AN/CRR-1. IMHO it is interesting to study the very serious use of these low-power marginal antenna emergency sets operating on MF from 75 years ago. The new 630m band is technically and *historically* fascinating. It's good to see equipment makers like Elecraft supply support for its use. Mike / KK5F (Kept a 500 kHz receiver near bedside for several decades!) Fred wrote: When the WW2 surplus began flooding the market in the US in the early 50's, the Gibson Girls already had the 8MHz frequency, 8280 if my memory serves me ... which it often doesn't. The story says it got changed to 8365 because people bought these things dirt cheap and did not know that when they cranked them, they transmit. __ 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 k...@flex.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] Sherwood Engineering Tests
Wes, I agree, and if you look at a post I made a couple days ago, it states that. Sherwood also states his list is sorted on one column and people shud take all factors into account when choosing a radio. I would NOT recommend a K3 for it's audio. Each person has their needs and should review them carefully. I would also not recommend a Drake R4-C, even though it is in the top quartile. I will send you a copy of an earlier post that I made. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes (N7WS) Sent: Tuesday, February 24, 2015 6:12 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests I'm sure there's a point here and I just fail to see what it is. Rob has stated many times (look for his videos) that one number does not a radio make. In fact, as best that I know, he doesn't own a K3. Wes N7WS On 2/23/2015 11:01 PM, jim wrote: Guys, Further, pesky, facts on said Real Radio at http://www.sherweng.com/table.html . Number two on the list. That is out of 116 receivers listed on the Sherwood page. That puts said Real Radio in the top 3% of the radios Bob Sherwood has tested for a critical receiver performance parameter. BTW, you will have to use the Page Down button, more than twice, to even get a hint of the Kenwood 590. It is number 20 on the list, putting it in the top 17% Also, important to note, is the Drake R4-C with the Sherwood roofing mod, listed at number 28. The R4-C is *ONLY* 45 (forty five) year old technology and that puts it in the top 23%. Yep, FORTY FIVE year old technology. Yep, top 23 %. Just some further, pesky, facts. Rake P.S. BTW, I learned 45 years ago. This flies in the face of someone's comment that I never learn. Ho Hum, another pesky fact. __ 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 jbol...@outlook.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] Sherwood Engineering Tests
I was one of the people who could most definitely hear the DSP artefacts above 12Khz prior to the DSP low pass filter upgrade. The low pass filter upgrade completely resolved it for me, this along with the various other changes over the years now has the K3 sounding very good to my ears. Do make sure that the speakers and headphones you are using are reasonably efficient so that the K3 can drive them effectively without having to run the AF amp 'flat out' For speakers I use a couple of old Motorola 2way radio speakers (3 Ohm impedance I think). As a headset I generally use a beyerdynmic DT-109 with 50Ohm earpieces, this works wonderfully with the K3 but as I am a fairly soft talker I made up a small preamp for the mic element http://ei6iz.com/?p=28 On Tue, 2015-02-24 at 09:48 -0800, Wayne Burdick wrote: ... Or you can add just the audio filter section as a small daughter board for $39 (K3DSPLPF). The upgrade does improve the spectra as viewed on an audio spectrum analyzer, but many operators won't be able to hear the effects by ear. Those who can hear them have told us it was a major improvement. Wayne N6KR -- 73 Brendan EI6IZ __ 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] Sherwood Engineering Tests
Wayne, Thanks. My Serial Number is 04841. I was told the LPF was most likely in my radio and I have not taken it apart to see if that is the case. DSP 1 and DSP 2 are at 02.83 MCU is at 04.86 As I stated in a mail I sent to the reflector, two days ago, I will be sending in my K3 on RMA to have you review and update where necessary. I will include a request to have Elecraft look at the audio spectra to make sure it is **clean**. Are the new Synth's needed for better audio performance? The **noise and hiss* is present with no signals present in the bandwidth of the 400 Hz crystal filter (or for that matter, any of the filters choosen). Look forward to seeing the results of the repair/update and will post my results. Jim W6AIM -Original Message- From: Wayne Burdick [mailto:n...@elecraft.com] Sent: Tuesday, February 24, 2015 9:28 AM To: jim Cc: 'Wes (N7WS)'; elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests Jim (et al), The K3's audio has improved due to three factors in the past couple of years: - a low-noise, low-pass audio filter stage was added to the DSP board, eliminating high-pitched CODEC artifacts - DSP firmware changes were made to correct AGC linearity and eliminate a CODEC quantization problem - main MCU firmware was modified to allow the user to select the lower AF cutoff in CW mode (100/200/300 Hz) by adjusting the lower edge of the crystal filters With the above changes in place, we carefully measured the K3's audio spectra and compared it to other radios with the same type of class-AB final AF amplifier IC (most transceivers fall into this category). They are all virtually identical. Rob, too, told us that the audio spectra he measured on a recent K3 (with new synths and the latest DSP and MCU firmware) was significantly improved from the K3 he measured several years ago. While it is possible to reduce audio IMD products even further, this typically requires a class-A final audio output stage, which would add perhaps 0.5 to 1.0 amps of additional receive-mode current drain (and an associated heatsink). That is inconsistent with the K3's intended usage, which includes excellent power efficiency for portable applications (Field Day/DXpedition/travel). Also, most users would not notice such a subtle change. 73, Wayne N6KR On Feb 24, 2015, at 8:19 AM, jim jbol...@outlook.com wrote: Wes, I agree, and if you look at a post I made a couple days ago, it states that. Sherwood also states his list is sorted on one column and people shud take all factors into account when choosing a radio. I would NOT recommend a K3 for it's audio. Each person has their needs and should review them carefully. I would also not recommend a Drake R4-C, even though it is in the top quartile. I will send you a copy of an earlier post that I made. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes (N7WS) Sent: Tuesday, February 24, 2015 6:12 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests I'm sure there's a point here and I just fail to see what it is. Rob has stated many times (look for his videos) that one number does not a radio make. In fact, as best that I know, he doesn't own a K3. Wes N7WS On 2/23/2015 11:01 PM, jim wrote: Guys, Further, pesky, facts on said Real Radio at http://www.sherweng.com/table.html . Number two on the list. That is out of 116 receivers listed on the Sherwood page. That puts said Real Radio in the top 3% of the radios Bob Sherwood has tested for a critical receiver performance parameter. BTW, you will have to use the Page Down button, more than twice, to even get a hint of the Kenwood 590. It is number 20 on the list, putting it in the top 17% Also, important to note, is the Drake R4-C with the Sherwood roofing mod, listed at number 28. The R4-C is *ONLY* 45 (forty five) year old technology and that puts it in the top 23%. Yep, FORTY FIVE year old technology. Yep, top 23 %. Just some further, pesky, facts. Rake P.S. BTW, I learned 45 years ago. This flies in the face of someone's comment that I never learn. Ho Hum, another pesky fact. __ 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 jbol...@outlook.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
[Elecraft] K2 OPT command
Hi hope someone can help me I have just finishing building a K2 when I change OPT to Optimization I lose sound. I put it back to BATT and it all comes back, I understand that this command reduces the I.F. post-mixer amplifier current by about 40 mA and automatically forces the bargraph to use DOT mode if set for BAR. Any help would be grateful. Don G6CMV K2 Ser Num 6546 __ 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] Sherwood Engineering Tests
On Tue, Feb 24, 2015 at 12:27 PM, Wayne Burdick n...@elecraft.com wrote: Jim (et al), The K3's audio has improved due to three factors in the past couple of years: - a low-noise, low-pass audio filter stage was added to the DSP board, eliminating high-pitched CODEC artifacts Approximately what serial number introduced this change? Thanks. 73, geo - n4ua - DSP firmware changes were made to correct AGC linearity and eliminate a CODEC quantization problem - main MCU firmware was modified to allow the user to select the lower AF cutoff in CW mode (100/200/300 Hz) by adjusting the lower edge of the crystal filters With the above changes in place, we carefully measured the K3's audio spectra and compared it to other radios with the same type of class-AB final AF amplifier IC (most transceivers fall into this category). They are all virtually identical. Rob, too, told us that the audio spectra he measured on a recent K3 (with new synths and the latest DSP and MCU firmware) was significantly improved from the K3 he measured several years ago. While it is possible to reduce audio IMD products even further, this typically requires a class-A final audio output stage, which would add perhaps 0.5 to 1.0 amps of additional receive-mode current drain (and an associated heatsink). That is inconsistent with the K3's intended usage, which includes excellent power efficiency for portable applications (Field Day/DXpedition/travel). Also, most users would not notice such a subtle change. 73, Wayne N6KR On Feb 24, 2015, at 8:19 AM, jim jbol...@outlook.com wrote: Wes, I agree, and if you look at a post I made a couple days ago, it states that. Sherwood also states his list is sorted on one column and people shud take all factors into account when choosing a radio. I would NOT recommend a K3 for it's audio. Each person has their needs and should review them carefully. I would also not recommend a Drake R4-C, even though it is in the top quartile. I will send you a copy of an earlier post that I made. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes (N7WS) Sent: Tuesday, February 24, 2015 6:12 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests I'm sure there's a point here and I just fail to see what it is. Rob has stated many times (look for his videos) that one number does not a radio make. In fact, as best that I know, he doesn't own a K3. Wes N7WS On 2/23/2015 11:01 PM, jim wrote: Guys, Further, pesky, facts on said Real Radio at http://www.sherweng.com/table.html . Number two on the list. That is out of 116 receivers listed on the Sherwood page. That puts said Real Radio in the top 3% of the radios Bob Sherwood has tested for a critical receiver performance parameter. BTW, you will have to use the Page Down button, more than twice, to even get a hint of the Kenwood 590. It is number 20 on the list, putting it in the top 17% Also, important to note, is the Drake R4-C with the Sherwood roofing mod, listed at number 28. The R4-C is *ONLY* 45 (forty five) year old technology and that puts it in the top 23%. Yep, FORTY FIVE year old technology. Yep, top 23 %. Just some further, pesky, facts. Rake P.S. BTW, I learned 45 years ago. This flies in the face of someone's comment that I never learn. Ho Hum, another pesky fact. __ 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 jbol...@outlook.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 n...@elecraft.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 n4ua...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help
Re: [Elecraft] Upgrading to the new Syn Card -- is there a noticable change?
It is not worth the time and effort, forget the cost, to upgrade George, W6GF On Tuesday, February 24, 2015 8:42 AM, KENT TRIMBLE k9...@socket.net wrote: Considering the time and effort to make them happen, all Elecraft upgrades are worth it. Whether you want to own an upgraded radio or a downgraded radio is up to you. Kent K9ZTV On 2/24/2015 8:00 AM, someone wrote: Do you think the upgrade was worth it? __ 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 georgefrit...@yahoo.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] Sherwood Engineering Tests
Jim (et al), The K3's audio has improved due to three factors in the past couple of years: - a low-noise, low-pass audio filter stage was added to the DSP board, eliminating high-pitched CODEC artifacts - DSP firmware changes were made to correct AGC linearity and eliminate a CODEC quantization problem - main MCU firmware was modified to allow the user to select the lower AF cutoff in CW mode (100/200/300 Hz) by adjusting the lower edge of the crystal filters With the above changes in place, we carefully measured the K3's audio spectra and compared it to other radios with the same type of class-AB final AF amplifier IC (most transceivers fall into this category). They are all virtually identical. Rob, too, told us that the audio spectra he measured on a recent K3 (with new synths and the latest DSP and MCU firmware) was significantly improved from the K3 he measured several years ago. While it is possible to reduce audio IMD products even further, this typically requires a class-A final audio output stage, which would add perhaps 0.5 to 1.0 amps of additional receive-mode current drain (and an associated heatsink). That is inconsistent with the K3's intended usage, which includes excellent power efficiency for portable applications (Field Day/DXpedition/travel). Also, most users would not notice such a subtle change. 73, Wayne N6KR On Feb 24, 2015, at 8:19 AM, jim jbol...@outlook.com wrote: Wes, I agree, and if you look at a post I made a couple days ago, it states that. Sherwood also states his list is sorted on one column and people shud take all factors into account when choosing a radio. I would NOT recommend a K3 for it's audio. Each person has their needs and should review them carefully. I would also not recommend a Drake R4-C, even though it is in the top quartile. I will send you a copy of an earlier post that I made. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes (N7WS) Sent: Tuesday, February 24, 2015 6:12 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests I'm sure there's a point here and I just fail to see what it is. Rob has stated many times (look for his videos) that one number does not a radio make. In fact, as best that I know, he doesn't own a K3. Wes N7WS On 2/23/2015 11:01 PM, jim wrote: Guys, Further, pesky, facts on said Real Radio at http://www.sherweng.com/table.html . Number two on the list. That is out of 116 receivers listed on the Sherwood page. That puts said Real Radio in the top 3% of the radios Bob Sherwood has tested for a critical receiver performance parameter. BTW, you will have to use the Page Down button, more than twice, to even get a hint of the Kenwood 590. It is number 20 on the list, putting it in the top 17% Also, important to note, is the Drake R4-C with the Sherwood roofing mod, listed at number 28. The R4-C is *ONLY* 45 (forty five) year old technology and that puts it in the top 23%. Yep, FORTY FIVE year old technology. Yep, top 23 %. Just some further, pesky, facts. Rake P.S. BTW, I learned 45 years ago. This flies in the face of someone's comment that I never learn. Ho Hum, another pesky fact. __ 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 jbol...@outlook.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 n...@elecraft.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] Upgrading to the new Syn Card -- is there a noticable change?
George, So you've actually purchased, installed, and worked with the new synth card(s)? With what were you disappointed? Dale WA8SRA It is not worth the time and effort, forget the cost, to upgrade George, W6GF On Tuesday, February 24, 2015 8:42 AM, KENT TRIMBLE k9...@socket.net wrote: Considering the time and effort to make them happen, all Elecraft upgrades are worth it. Whether you want to own an upgraded radio or a downgraded radio is up to you. Kent K9ZTV On 2/24/2015 8:00 AM, someone wrote: Do you think the upgrade was worth it?  __ 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 georgefrit...@yahoo.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 d...@lightstream.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 and FLDigi
I've been using CocoaModem, but since Chen isn't supporting it anymore, I feel the need to move on. I'm trying to get fldigi working, hopefully with RUMLogNG. It decodes CW but not RTTY, and doesn't transmit either. I suspect off-line would be best. 73, Mike NF4L __ 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 SYNTH
Fred http://www.elecraft.com/order_form_parts.htm#K3%20Parts 73, Mike NF4L On Feb 24, 2015, at 1:28 PM, Fred Jensen k6...@foothill.net wrote: Can someone point me to the new K3 synthesizer option on the order page on the web site? I can't find it. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@comcast.net __ 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] Sherwood Engineering Tests
Jim, Yes, you have the new DSP boards. I'm sure customer support will check out your audio as requested. There will always be noise and hiss with no signal present and gain controls maximized, because the K3 has a lot of gain in the RX signal path, like any modern transceiver. But with AF gain, RF gain and preamp settings appropriately adjusted, even the noise from a very poor antenna will completely dominate any noise generated within the radio itself. If not, you have something set up incorrectly, or a hardware issue that CS will be able to identify. The new synths are not required just to produce clean audio. It should already be clean. 73, Wayne N6KR On Feb 24, 2015, at 10:50 AM, jim jbol...@outlook.com wrote: Wayne, Thanks. My Serial Number is 04841. I was told the LPF was most likely in my radio and I have not taken it apart to see if that is the case. DSP 1 and DSP 2 are at 02.83 MCU is at 04.86 As I stated in a mail I sent to the reflector, two days ago, I will be sending in my K3 on RMA to have you review and update where necessary. I will include a request to have Elecraft look at the audio spectra to make sure it is **clean**. Are the new Synth's needed for better audio performance? The **noise and hiss* is present with no signals present in the bandwidth of the 400 Hz crystal filter (or for that matter, any of the filters choosen). Look forward to seeing the results of the repair/update and will post my results. Jim W6AIM -Original Message- From: Wayne Burdick [mailto:n...@elecraft.com] Sent: Tuesday, February 24, 2015 9:28 AM To: jim Cc: 'Wes (N7WS)'; elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests Jim (et al), The K3's audio has improved due to three factors in the past couple of years: - a low-noise, low-pass audio filter stage was added to the DSP board, eliminating high-pitched CODEC artifacts - DSP firmware changes were made to correct AGC linearity and eliminate a CODEC quantization problem - main MCU firmware was modified to allow the user to select the lower AF cutoff in CW mode (100/200/300 Hz) by adjusting the lower edge of the crystal filters With the above changes in place, we carefully measured the K3's audio spectra and compared it to other radios with the same type of class-AB final AF amplifier IC (most transceivers fall into this category). They are all virtually identical. Rob, too, told us that the audio spectra he measured on a recent K3 (with new synths and the latest DSP and MCU firmware) was significantly improved from the K3 he measured several years ago. While it is possible to reduce audio IMD products even further, this typically requires a class-A final audio output stage, which would add perhaps 0.5 to 1.0 amps of additional receive-mode current drain (and an associated heatsink). That is inconsistent with the K3's intended usage, which includes excellent power efficiency for portable applications (Field Day/DXpedition/travel). Also, most users would not notice such a subtle change. 73, Wayne N6KR On Feb 24, 2015, at 8:19 AM, jim jbol...@outlook.com wrote: Wes, I agree, and if you look at a post I made a couple days ago, it states that. Sherwood also states his list is sorted on one column and people shud take all factors into account when choosing a radio. I would NOT recommend a K3 for it's audio. Each person has their needs and should review them carefully. I would also not recommend a Drake R4-C, even though it is in the top quartile. I will send you a copy of an earlier post that I made. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes (N7WS) Sent: Tuesday, February 24, 2015 6:12 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests I'm sure there's a point here and I just fail to see what it is. Rob has stated many times (look for his videos) that one number does not a radio make. In fact, as best that I know, he doesn't own a K3. Wes N7WS On 2/23/2015 11:01 PM, jim wrote: Guys, Further, pesky, facts on said Real Radio at http://www.sherweng.com/table.html . Number two on the list. That is out of 116 receivers listed on the Sherwood page. That puts said Real Radio in the top 3% of the radios Bob Sherwood has tested for a critical receiver performance parameter. BTW, you will have to use the Page Down button, more than twice, to even get a hint of the Kenwood 590. It is number 20 on the list, putting it in the top 17% Also, important to note, is the Drake R4-C with the Sherwood roofing mod, listed at number 28. The R4-C is *ONLY* 45 (forty five) year old technology and that puts it in the top 23%. Yep, FORTY FIVE year old technology. Yep, top 23 %. Just some further, pesky, facts. Rake P.S.
Re: [Elecraft] Elecraft Digest, Vol 130, Issue 53
Steve, So they did something to reduce CODEC artifacts. Not just AGC mods. Interesting. And the talk of lower AF cutoff selection is news to me: were you aware of it? Alan On 24/02/2015 19:05, elecraft-requ...@mailman.qth.net wrote: Date: Tue, 24 Feb 2015 09:27:42 -0800 From: Wayne Burdickn...@elecraft.com To: jimjbol...@outlook.com Cc:elecraft@mailman.qth.net, 'Wes \(N7WS\)'w...@triconet.org Subject: Re: [Elecraft] Sherwood Engineering Tests Message-ID:966816b7-51da-4f7e-acaf-16cbcacb6...@elecraft.com Content-Type: text/plain; charset=us-ascii Jim (et al), The K3's audio has improved due to three factors in the past couple of years: - a low-noise, low-pass audio filter stage was added to the DSP board, eliminating high-pitched CODEC artifacts - DSP firmware changes were made to correct AGC linearity and eliminate a CODEC quantization problem - main MCU firmware was modified to allow the user to select the lower AF cutoff in CW mode (100/200/300 Hz) by adjusting the lower edge of the crystal filters With the above changes in place, we carefully measured the K3's audio spectra and compared it to other radios with the same type of class-AB final AF amplifier IC (most transceivers fall into this category). They are all virtually identical. Rob, too, told us that the audio spectra he measured on a recent K3 (with new synths and the latest DSP and MCU firmware) was significantly improved from the K3 he measured several years ago. While it is possible to reduce audio IMD products even further, this typically requires a class-A final audio output stage, which would add perhaps 0.5 to 1.0 amps of additional receive-mode current drain (and an associated heatsink). That is inconsistent with the K3's intended usage, which includes excellent power efficiency for portable applications (Field Day/DXpedition/travel). Also, most users would not notice such a subtle change. 73, Wayne N6KR -- Alan Ibbetson a...@g3xaq.net __ 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] Sherwood Engineering Tests
I have so much external **noise** in the shack with whirring fans on the K3 and spinning hard drives that speakers are not seriously used during operation of my K3 station. I am using the BOSE QC-15 noise canceling headphones, with the sensitivity switch set to **high** so the audio control on the K3 is rarely run past 12 noon (with a corresponding reduction in RF gain in an effort to hear weaker CW signals better). If I am not riding the RF gain, the audio is never past 10 o'clock. Yea, I hear something. It is present on my K3 and not on my friend's (NY6C) rig in an A/B comparison. I hand carried my K3 from California to Utah for the CW Sweepstakes contest last November and compared the two. His was quiet, I heard artifacts on mine, so I am hoping it is a problem with hardware/software and willing to have Elecraft look at it. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brendan Minish Sent: Tuesday, February 24, 2015 10:46 AM To: Elecraft Reflector Subject: Re: [Elecraft] Sherwood Engineering Tests I was one of the people who could most definitely hear the DSP artefacts above 12Khz prior to the DSP low pass filter upgrade. The low pass filter upgrade completely resolved it for me, this along with the various other changes over the years now has the K3 sounding very good to my ears. Do make sure that the speakers and headphones you are using are reasonably efficient so that the K3 can drive them effectively without having to run the AF amp 'flat out' For speakers I use a couple of old Motorola 2way radio speakers (3 Ohm impedance I think). As a headset I generally use a beyerdynmic DT-109 with 50Ohm earpieces, this works wonderfully with the K3 but as I am a fairly soft talker I made up a small preamp for the mic element http://ei6iz.com/?p=28 On Tue, 2015-02-24 at 09:48 -0800, Wayne Burdick wrote: ... Or you can add just the audio filter section as a small daughter board for $39 (K3DSPLPF). The upgrade does improve the spectra as viewed on an audio spectrum analyzer, but many operators won't be able to hear the effects by ear. Those who can hear them have told us it was a major improvement. Wayne N6KR -- 73 Brendan EI6IZ __ 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 jbol...@outlook.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] K3 and FLDigi
But that’s a problem of probable general interest and the results should end up in the archives. DavidK0LUM On Feb 24, 2015, at 12:09 PM, Mike Reublin NF4L n...@comcast.net wrote: I've been using CocoaModem, but since Chen isn't supporting it anymore, I feel the need to move on. I'm trying to get fldigi working, hopefully with RUMLogNG. It decodes CW but not RTTY, and doesn't transmit either. I suspect off-line would be best. 73, Mike NF4L __ __ 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 Transmitter Gain Calibration fails
On Tue, 24 Feb 2015, Nate Bargmann wrote: * On 2015 24 Feb 09:48 -0600, dl2ki wrote: Hello, after updating the firmware to MCU version 5.10 the Transmitter Gain Calibration fails. The error message is: /Elecraft K3 Utility for Linux Revision 1.14.10.24 K3 MCU revision 05.10. RS-232 speed 4800 bps. Starting 5 watt calibration. GetTunePower: Unexpected response '?;' to ''. 5 watt calibration failed. Elapsed time: 6,0 secs/ The same with the 50W Calibration. Where is the problem? I don't know, but a power reset of my radio and running the calibration again worked as expected. I'm getting all sorts of errors from the Mac utility, but if I use a Win8 laptop I have no issues at all. -- Hisashi T Fujinaka - ht...@twofifty.com BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KX3 - Adjustable RTY/PSK Idle Timeout
Hello, Is the default 4 second idle timeout in the KX3's built-in keyer RTTY/PSK31 transmit feature something we can adjust to, say, 1/2 second? It seems all too often a response is well underway by the time the transmission ends in quick QSO conditions. I totally get the reasoning for the 4 seconds, but having it adjustable via menu and/or CAT would be very helpful. A menu setting would be plenty good enough. I will continue my search through the programming manual for an answer. If this idle time adjustment is not currently possible, consider this a feature request. Many thanks. John, kx4o __ 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] Sherwood Engineering Tests
I'm not into computer-focused rigs: Like my old fashioned dials, George :-) K3/P3/KPA500/KAT500 is likely my ultimate station! 73, Phil W7OX On 2/24/15 6:37 PM, George Fritkin wrote: How about this. Forget the upgrade, save the money, sell your dual RX K3 and buy the FLEX...then you are #1 George, W6GF Sent from my iPad On Feb 24, 2015, at 6:11 PM, Phil Wheeler w...@socal.rr.com wrote: Of course not, Jim -- but most of us didn't *need* to buy Elecraft either :-) Staying at the head of the pack does take the upgrade. But I cheated: With only one usable ear, no Sub RX to upgrade! Phil W7OX (in Torrance) On 2/24/15 5:35 PM, Jim Lowman wrote: First of all, congratulations to Elecraft for raising the bar (or at least jumping higher) to get to Sherwood ranking #2! This sort of begs the question that I failed to ask when these upgrades were announced - do I really need to upgrade? In other words, who is the intended user of this lofty technology? Will it really improve the performance of my K3 that I can see (hear), or would I be paying about $200 x 2 (I have the second RX) for performance that can be measured only with precision lab instruments? 73 de Jim - AD6CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Sherwood Engineering Tests
Of course not, Jim -- but most of us didn't *need* to buy Elecraft either :-) Staying at the head of the pack does take the upgrade. But I cheated: With only one usable ear, no Sub RX to upgrade! Phil W7OX (in Torrance) On 2/24/15 5:35 PM, Jim Lowman wrote: First of all, congratulations to Elecraft for raising the bar (or at least jumping higher) to get to Sherwood ranking #2! This sort of begs the question that I failed to ask when these upgrades were announced - do I really need to upgrade? In other words, who is the intended user of this lofty technology? Will it really improve the performance of my K3 that I can see (hear), or would I be paying about $200 x 2 (I have the second RX) for performance that can be measured only with precision lab instruments? 73 de Jim - AD6CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Sherwood Engineering Tests
In my case I want my K3 to be the best it can be as I have in the past taken it to FD. I also work weak signals and want to ensure that interference from nearby signals will be minimized. But mainly I want to be able to work 630m and below without a minimum of fuss. The new synth(s) allow for all of that. jim ab3cv __ 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] Old KSYN3 cards
The price for a K3-10 kit was $1499.00 in March 2011. The current price is $1599.00. Dwayne WV5I On 2/24/2015 8:25 PM, Gary Gregory wrote: Has a new K3 price gone up $200 for a single receiver version K3 i wonder Gary Vk1ZZ K3, KX3, KPA500-FT, KAT500-FT,P3. On 25/02/2015 7:17 AM, Stan Gibbs, KR7C s...@kr7c.net wrote: __ 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] Old KSYN3 cards
According to the original statements, no. The price is the same. Bravo! 73, Rick wa6nhc Tiny iPhone 5 keypad, typos are inevitable On Feb 24, 2015, at 6:25 PM, Gary Gregory vk1zzg...@gmail.com wrote: Has a new K3 price gone up $200 for a single receiver version K3 i wonder Gary Vk1ZZ __ 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] Sherwood Engineering Tests
How about this. Forget the upgrade, save the money, sell your dual RX K3 and buy the FLEX...then you are #1 George, W6GF Sent from my iPad On Feb 24, 2015, at 6:11 PM, Phil Wheeler w...@socal.rr.com wrote: Of course not, Jim -- but most of us didn't *need* to buy Elecraft either :-) Staying at the head of the pack does take the upgrade. But I cheated: With only one usable ear, no Sub RX to upgrade! Phil W7OX (in Torrance) On 2/24/15 5:35 PM, Jim Lowman wrote: First of all, congratulations to Elecraft for raising the bar (or at least jumping higher) to get to Sherwood ranking #2! This sort of begs the question that I failed to ask when these upgrades were announced - do I really need to upgrade? In other words, who is the intended user of this lofty technology? Will it really improve the performance of my K3 that I can see (hear), or would I be paying about $200 x 2 (I have the second RX) for performance that can be measured only with precision lab instruments? 73 de Jim - AD6CW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to georgefrit...@yahoo.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] K3 and FLDigi
David, you may be correct, so I will repost to the list what I sent to Mike earlier today. It did not entirely correct his problem, however. Mike, I'm pretty new to digital, but am using Fldigi, so I'll give it a shot. In Windows, I right-clicked on the speaker icon in the lower right corner, then selected Sounds. On the Playback tab, I selected Speakers set to my USB Audio CODEC; likewise, on the Recording tab, Microphone is also set to my USB Audio CODEC. In Fldigi, in Config\Soundcard (I'm using an audio interface: Tascam US-100), I set Audio\Devices by checking PortAudio, then selecting the Microphone (under Capture) and Speakers (under Playback) that my sound card is set to in Windows sound - USB Audio CODEC. Next, in Fldigi in Config\Rig control, choose the Rig tab, then Hamlib. In Hamlib, check the box in front of Use Hamlib at the top. In Rig choose Elecraft K3/KX3 (Beta). In Device, choose your com port. Below that, set the Baud rate to 38400. On the left side, check the box for PTT via Hamlib command. Finally, click Save at the bottom, then Close. Hope that helps and works for your set up. 73, Dave W8OV On 2/24/2015 6:16 PM, David Christ wrote: But that’s a problem of probable general interest and the results should end up in the archives. DavidK0LUM On Feb 24, 2015, at 12:09 PM, Mike Reublin NF4L n...@comcast.net wrote: I've been using CocoaModem, but since Chen isn't supporting it anymore, I feel the need to move on. I'm trying to get fldigi working, hopefully with RUMLogNG. It decodes CW but not RTTY, and doesn't transmit either. I suspect off-line would be best. 73, Mike NF4L __ __ 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 w...@verizon.net __ 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] FW: Sherwood Engineering Tests
I'm old enough to remember that the most important characteristic of a receiver was sensitivity. Nothing else seemed to matter. Some receivers of the time had 2 RF amplifiers to make sure that they won the sensitivity battle. And, what would happened when a strong signal, not necessarily S9, would appear, bad things happened to your radio. At this point I won't define the date. This lunacy was being looked at by a number engineers, to include Dr. Ulrich Rhode, W2 something. I forget his call. He said in a series of papers in professional journals and Ham Radio Magazine that sensitivity was not the most important parameter at the time. It would turn out to be LO noise sidebands and dynamic range. That still holds today, and now, IMHO, ultimate rejection should be added. All of this is shown in Sherwood's data. What this all means is that all of the receiver parameters must be looked at to decide what makes a great radio. I suggest a review of some of Rhode's papers. His writings make extremely interesting reading as it addresses this discussion directly. 73, Barry K3NDM - Original Message - From: Wayne Burdick n...@elecraft.com To: Chester Alderman alderm...@windstream.net Cc: Elecraft Reflector Elecraft@mailman.qth.net Sent: Tuesday, February 24, 2015 4:57:23 PM Subject: Re: [Elecraft] FW: Sherwood Engineering Tests Just to complete the point about this: The K3 tested probably didn't have its S-meter calibration (RX gain cal) completed before we sent it to Rob, an oversight on our part. This procedure is fully automated by the K3 Utility program, and definitely would have corrected the sensitivity threshold issue Rob observed. 73, Wayne N6KR On Feb 24, 2015, at 1:54 PM, Wayne Burdick n...@elecraft.com wrote: Some on this list are still mistaking this column of Sherwood's chart as *receiver sensitivity*. I believe it is a measurement of AGC threshold. The K3's receiver sensitivity (MDS) is excellent by any measure; see the noise floor column. (Side-note: It's interesting that the preamp-off sensitivity of the tested K3 was -136 dBm, while that of the Flex 6700 was -118 dBm -- an 18-dB difference. One would have to leave the preamp ON much more often with the '6700. As Sherwood noted, this maximizes the '6700's dynamic range, but you'd also be hitting the A/D that much harder.) 73, Wayne N6KR On Feb 24, 2015, at 12:24 PM, Chester Alderman alderm...@windstream.net wrote: _ From: Chester Alderman [mailto:alderm...@windstream.net] Sent: Tuesday, February 24, 2015 1:59 PM To: 'Yngvi (TF3Y)' Cc: 'Elecraft Reflector' Subject: RE: [Elecraft] Sherwood Engineering Tests Hi Yvgvi, I wonder, given atmospheric noise levels, if that is really going to be noticed by the operator. I seriously doubt It would be noticed in a contest? 73, Tom - W4BQF -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Yngvi (TF3Y) Sent: Tuesday, February 24, 2015 1:26 PM To: elecraft@mailman.qth.net mailto:elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests These are interesting stats. One thing I noticed was the apparent loss in sensitivity as measured by Sherwood. This is probably not a big issue for most these days with the ever increasing noise levels but for the few in silent locations, incl. some DXpeditions this might be an issue. Any comments on this? 73, Yngvi TF3Y http://www.tf3y.net __ 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 n...@elecraft.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 n...@elecraft.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 k3...@comcast.net __ 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
Re: [Elecraft] K3: hmcu0510b.hex
The b version is for a newer LCD driver. If your front panel was built with the newer LCD driver, there's a permanent mark in the radio's flash memory that the K3 Utility uses to figure out which firmware file to use. Don't try to rename files; the K3 Utility will figure it out and load the firmware file appropriate for your front panel board. 73 de Dick, K6KR -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of alexandr.kobra...@seznam.cz Sent: Tuesday, February 24, 2015 14:40 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3: hmcu0510b.hex I can see file hmcu0510b.hex (ftp://ftp.elecraft.com/K3/firmware/hmcu0510b.hex) on ftp. This b version is about LCD driver as it was before (if I remember correctly)? Or...? 73! L. ok1dst __ 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 d...@elecraft.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] Old KSYN3 cards
Go take a look, but I think not:-) Phil W7OX On 2/24/15 6:25 PM, Gary Gregory wrote: Has a new K3 price gone up $200 for a single receiver version K3 i wonder Gary Vk1ZZ K3, KX3, KPA500-FT, KAT500-FT,P3. On 25/02/2015 7:17 AM, Stan Gibbs, KR7C s...@kr7c.net wrote: Don Wilhelm-4 wrote someone with a non-sub K3 who wants to add the subRX without upgrading the KSYN3 in the main RX. Is it possible to order a KRX3 *without* a synthesizer board? If it were, there would certainly be a better market for the old boards. I would be much more likely to upgrade to the new KSYN3 for my two K3's, each with two receivers, if I could recover some of the cost by selling the old synthesizers. __ 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] Old KSYN3 cards
Hif a new board is $200 as a standalone upgrade item, one might assume it would increase the cost of a new k3 by at least a smaller margin to help defray design costs. If not then one could ponder if these other factors are simply applied to boards sold separately. Just curious. I wont be upgrading just yetfirst job is to get my K3 to work as designed. Being an older serial number it has issues and a return trip to the factory is over $850.00 AUD sadly, so for now it is accumulating dust and age. Gary Vk1ZZ K3, KX3, KPA500-FT, KAT500-FT,P3. On 25/02/2015 12:37 PM, Rick Bates happymooseph...@gmail.com wrote: According to the original statements, no. The price is the same. Bravo! 73, Rick wa6nhc Tiny iPhone 5 keypad, typos are inevitable On Feb 24, 2015, at 6:25 PM, Gary Gregory vk1zzg...@gmail.com wrote: Has a new K3 price gone up $200 for a single receiver version K3 i wonder Gary Vk1ZZ __ 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] FW: Sherwood Engineering Tests
Thanks for the explanation Wayne. 73, Yngvi TF3Y On Tue, Feb 24, 2015 at 9:57 PM, Wayne Burdick n...@elecraft.com wrote: Just to complete the point about this: The K3 tested probably didn't have its S-meter calibration (RX gain cal) completed before we sent it to Rob, an oversight on our part. This procedure is fully automated by the K3 Utility program, and definitely would have corrected the sensitivity threshold issue Rob observed. 73, Wayne N6KR On Feb 24, 2015, at 1:54 PM, Wayne Burdick n...@elecraft.com wrote: Some on this list are still mistaking this column of Sherwood's chart as *receiver sensitivity*. I believe it is a measurement of AGC threshold. The K3's receiver sensitivity (MDS) is excellent by any measure; see the noise floor column. (Side-note: It's interesting that the preamp-off sensitivity of the tested K3 was -136 dBm, while that of the Flex 6700 was -118 dBm -- an 18-dB difference. One would have to leave the preamp ON much more often with the '6700. As Sherwood noted, this maximizes the '6700's dynamic range, but you'd also be hitting the A/D that much harder.) 73, Wayne N6KR On Feb 24, 2015, at 12:24 PM, Chester Alderman alderm...@windstream.net wrote: _ From: Chester Alderman [mailto:alderm...@windstream.net] Sent: Tuesday, February 24, 2015 1:59 PM To: 'Yngvi (TF3Y)' Cc: 'Elecraft Reflector' Subject: RE: [Elecraft] Sherwood Engineering Tests Hi Yvgvi, I wonder, given atmospheric noise levels, if that is really going to be noticed by the operator. I seriously doubt It would be noticed in a contest? 73, Tom - W4BQF -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Yngvi (TF3Y) Sent: Tuesday, February 24, 2015 1:26 PM To: elecraft@mailman.qth.net mailto:elecraft@mailman.qth.net Subject: Re: [Elecraft] Sherwood Engineering Tests These are interesting stats. One thing I noticed was the apparent loss in sensitivity as measured by Sherwood. This is probably not a big issue for most these days with the ever increasing noise levels but for the few in silent locations, incl. some DXpeditions this might be an issue. Any comments on this? 73, Yngvi TF3Y http://www.tf3y.net __ 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 n...@elecraft.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 n...@elecraft.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 t...@tf3y.net -- http://www.tf3y.net __ 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] P3 - Split operation
I realize that the discussion about split operations have beenenough to tan the hides of every bovine used for McDonald'shamburgers for the next century, but I would like to add my voteto what Fred mentioned, as I'm one of those 10% or so of maleswho suffer from the inability to distinguish reds, greens, browns,and other similar earth tones. I freely admit that my XYL has tomatch a lot of my clothing for me. In my professional career, I even encountered one poor guy whohad to use a hood over a 7-segment LED display (on the front panelof a PDP11/34) to be able to read it, even though there were no othercolors in the immediate vicinity; he had to rely solely on the relativebrightness of the display. I can, I think, differentiate a lot of colors,but my wife will tell you that it's a guess at best, and usually wrong,and the accuracy depends strongly on the color/temperature of theambient light in the room. I score the best accuracy in pure sunlight. So, yes, some chromatic ergonomic engineering would be sincerely appreciated! tnx es 73, Brandy, N1HO Fred Jensen, k6dgw, said, in part, ...red and green are probably the worst choices since defective colorvision is way more prevalent in males than females, the vast majorityof hams are male, and inability to distinguish red and green is the mostcommon color vision defect. __ 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] K2 OPT command
Maybe check R84 and particularly R85 are the correct values, and doesn't have any dry joints? I'm guessing that Q12 takes R84 in/out of circuit in order to set bias current on Q22, and if Q12 is open circuit to set optimised bias current, and there is a problem with R85, the post mixer amplifier won't work properly? 73, Matt VK2RQ On 25 Feb 2015, at 12:35 am, Don Palmer d.pal...@btinternet.com wrote: Hi hope someone can help me I have just finishing building a K2 when I change OPT to Optimization I lose sound. I put it back to BATT and it all comes back, I understand that this command reduces the I.F. post-mixer amplifier current by about 40 mA and automatically forces the bargraph to use DOT mode if set for BAR. Any help would be grateful. Don G6CMV K2 Ser Num 6546 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to matt.vk...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] For Sale Elecraft K3/100
FOR SALE: Elecraft K3/100 serial number 82XX with KFL3B-FM, 2.7, 1.8 and 400HZ filters. This radio has the following options added: KAT3 ATU KBPF3 K3 general coverage receiver module KDVR3 K3 digital voice recorder KXV3A K3 RX Ant, IF Out Xvrtr interface KTCX03-1 K3 TCXO (0.5ppm) KRX3 K3 2nd receiver with 2.7, 1.8 and 400hz filters K144XV K3 internal 2 meter module with K144RFLK REFLOCK option K3 stainless H/W kit The radio is 9.9+ out of 10. Only has about 12 hours of use. Purchased this 2nd K3 and just never used the radio so I have decided to sell. New kit price as equipped was over $4700.00 Priced at only $3500.00. Shipping to lower 48 is $25.00 Phone number is 318-734-0881. Email nela...@yahoo.com PayPal OK with buyer and seller sharing fees. The radio is located in Monroe, Louisiana. Last offer here before eBay. Keith, KV5J, XE3/K5ENS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KXPA Power Level
I just completed building my new KXPA100 and have connected the amplifier to my new KX3 using the control cable. I have also ensured that I have the latest production firmware on both the KX3 and the KXPA100. Everything seems to operate correctly with the following exception. The output from the KXPA as observed on the KXPA Utility agrees closely with the selected output on the KX3 only for power settings under 75 watts. For power settings above 75 watts, the KXPA output lags the selected output and never exceeds 80 watts even when the KX3 selected power is 100 watts or more. The LED’s on the KXPA support these readings since the highest LED reading is 80 even when the selected power is 100 watts or more. The RF Output displayed on the KX3 matches the selected output level at all power levels. These readings were taken while transmitting into a dummy load with an SWR reading of 1.1 on the Utility. The supply voltage to the KXPA displayed on the Utility at full power was 13.3 volts. I have performed the KX3 Power Output Display Calibration procedure in the KXPA100 manual several times, but this has not corrected the power issue. The Power Output Display Calibration procedure seemed to perform properly as described in the manual. However, after performing this procedure, I continue to observe ALC Ax.x on the KX3 TX GAIN menu rather than ALC tx.x as mentioned in the manual at various power levels from 10 watts to 100 watts. It appears that the KX3 is not saving the new drive levels. I have submitted this issue to Elecraft support, but we have not yet diagnosed the problem. I would appreciate any suggestions as to what might be causing this problem and what I can do to correct the issue. 73, David K5ADL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Seeking testers for K3 field-test firmware that fixes synthesizer bug
Hi all, We discovered that a very small percentage of K3s fitted with the new KSYN3A synthesizers have some difficulty communicating with the K3's main MCU. The problem was actually in the main MCU firmware, and it has now been corrected. We're anxious to get this firmware out to everyone installing new synths, so ideally we would go to beta ASAP. We need to do the usual testing first. Both the old and new synthesizers should work perfectly with the new firmware, and we'll need volunteers with both kinds. If you can load the new firmware either tonight or tomorrow and can put in at least 30 minutes of test time (just using the radio normally), please email me directly. See full release notes below. These cover everything added since rev. 5.10. 73, Wayne N6KR * * * MCU 5.13 / DSP 2.83 / FPF 1.19, 2-24-2015 * FIXED KSYN3A CONTROL BUG: On some K3s, a communications error would sometimes occur between the main MCU and KSYN3A, leading to either the main or sub receiver being off frequency. This has been corrected. * TURNING DIVERSITY OFF DOESN’T TURN OFF THE SUB RX: This applies to both a hold of the SUB switch and the DV0 host command. The sub must be turned off by tapping SUB. (Also see next item.) * NEW DVS HOST COMMAND: This variation of the DV command turns both diversity and the sub RX on/off at the same time. This is useful for operators who want a single switch macro to quickly alternate between sub with diversity ON, and sub OFF. Use K3 Utility to create a switch macro, then assign it to a programmable switch using CONFIG:MACRO n. * DT HOST COMMAND FIX (data sub-mode): The DT set command to select the DATA submode for VFO A now correctly sets the same submode for VFO B. * RF board device driver updates. No effect on normal operation. __ 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] KX3 - Adjustable RTY/PSK Idle Timeout
John, Send the IM character to stop transmission immediately. That is sent as a prosign would be - dit dit dah dah, and not as 2 letters. If you have trouble sending it correctly, think of it as sending the numeral 2 without the last dah. You can also imbed that character in memories. It will not send anything in CW, but will end transmission immediately in data modes. 73, Don W3FPR On 2/24/2015 9:32 PM, John wrote: Hello, Is the default 4 second idle timeout in the KX3's built-in keyer RTTY/PSK31 transmit feature something we can adjust to, say, 1/2 second? It seems all too often a response is well underway by the time the transmission ends in quick QSO conditions. I totally get the reasoning for the 4 seconds, but having it adjustable via menu and/or CAT would be very helpful. A menu setting would be plenty good enough. I will continue my search through the programming manual for an answer. If this idle time adjustment is not currently possible, consider this a feature request. Many thanks. John, kx4o __ 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 w3...@embarqmail.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] Old KSYN3 cards
Or the newer card costs them about the same as the older model; (and) or they'll eat the price difference. Nice thing about Elecraft is that you can do the updates/upgrades yourself, even piecemeal as a budget allows. Mine is almost never turned off; dust is another matter. ;-). I'll give it an internal dusting when I do the upgrade. 73, Rick wa6nhc Tiny iPhone 5 keypad, typos are inevitable On Feb 24, 2015, at 6:47 PM, Gary Gregory vk1zzg...@gmail.com wrote: Hif a new board is $200 as a standalone upgrade item, one might assume it would increase the cost of a new k3 by at least a smaller margin to help defray design costs. If not then one could ponder if these other factors are simply applied to boards sold separately. Just curious. I wont be upgrading just yetfirst job is to get my K3 to work as designed. Being an older serial number it has issues and a return trip to the factory is over $850.00 AUD sadly, so for now it is accumulating dust and age. Gary Vk1ZZ K3, KX3, KPA500-FT, KAT500-FT,P3. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] MFJ 434B Connections
Hi, this is Mark Griffin, KB3Z. Has anyone connected a MFJ 434B Voice Keyer to the K3? I assume that I would connect my Heil HM-12 microphone to the external microphone jack on the front of the unit. The man from MFJ said I would have to set up the jumpers in the unit for a Kenwood. But for some oddball reason they use a modular cable plug to connect the 434B to my K3. I realize I would have to use the MIC Connector on the back of my K3 and would have to make the necessary change with the K3 so it knows that I am using the MIC connector in the back. But where do I find one of these Modular cables to connect the 434B to the K3. Any help or advice would be very much appreciated. Mark Griffin KB3Z __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 DSP rev D board S/N's
Regarding the recent thread about the K3 DSP board, according to http://www.elecraft.com/K3/mods/dsp_rev_c_information.htm it says that beginning serial number 3626 +/- 10, K3s shipped rev D of the DSP board. Hope the info is useful to some. 73, Mike ab3ap __ 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
