[Elecraft] Elecraft CW Net Announcement
Good Evening, The twenty meter net may or may not meet tomorrow. That depends on whether there will be room amoungst the WPX folks. The second net won't be a problem: it will begin the moment after the contest closes. Conditions are not auspicious. However, that has not stopped us yet. The sun was active earlier in the weak but less so today. By the way: next Sunday, June 6, the Elecraft CW Net will be 19 years old. Sometime in 1957 my brother put headphones on my head so I could hear his new shortwave receiver. He found he could keep me out of his hair for hours after he showed me how to use the tuning knob and the gain controls. I was hooked on all the odd noises I could find. Listening became a habit I maintained until I graduated from high school. The bands are still filled with odd noises. Many new ones as our neighborhoods fill with electronic gadgets. But there are still the old standards. Whistling noises which move through the passband. Snaps of distant lightning. Hearing my own callsign echoed a little out of sync. Fewer AM heterodynes, but far more SSB signals. Then there is phantom CW found in static the day after a contest. Please join us on (or near): 14050 kHz at 2200z Sunday (3 PM PDT Sunday) Maybe way off if I can find room. 7047 kHz at z Monday (5 PM PDT Sunday) 73, Kevin. KD5ONS - May my silences become more accurate. - Theodore Roethke __ 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] KPA500 cabinet buzz
Mark: I have this same issue with my KPA500, connected to my K3S via AuxIO cable. It's been that way since new from Elecraft. It sounds like the AC transformer vibrating against the cabinet? It's the same on different bands and power levels. I've just never had the time to research the problem. 73, Dick, N4UN > After much searching, this 2.4 year old thread is the only info I can find on this issue. I bought a factory built KPA500 a few months ago and mine buzzes on CW key down. Af first I thought maybe this is normal as I never owned an HF amp. Now I think it is a problem. Any know how to fix this? I can shoot a short movie if that helps. 73, Mark K2QO __ 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] KPA500 cabinet buzz
After much searching, this 2.4 year old thread is the only info I can find on this issue. I bought a factory built KPA500 a few months ago and mine buzzes on CW key down. Af first I thought maybe this is normal as I never owned an HF amp. Now I think it is a problem. Any know how to fix this? I can shoot a short movie if that helps. 73, Mark K2QO -- Sent from: http://elecraft.365791.n2.nabble.com/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] New K4 beta software available (Release 17)
If you're not right in the middle of the WPX contest, you might want to update to the latest K4 beta software. Relative to the current production release (13), the beta update includes many new features and improvements. Here are a few highlights: MACRO EDITOR -- Allows operator to customize up to 13 switch functions on the K4 itself as well as all 16 functions of the K-Pod remote controller. Supports virtually the full K4 remote-control command set. RECEIVER PERFORMANCE -- Changes have been made to significantly improve dynamic range under extreme signal conditions. (Sherwood's receiver performance table reflects these changes.) SSB/ESSB BANDWIDTH CONTROLS -- You can now directly set the SSB and ESSB transmit bandwidth. ADC OVERFLOW INDICATION: The "+" symbol in "+60" on the S-meter turns magenta if the associated receiver's ADC hits overflow level. In previous releases this was happening on some transitions from RX to TX. With this corrected, uers can now set MENU:RX Auto Attenuation to ON if desired. * * * Full release notes can be viewed at the K4 at the time the beta release is downloaded (and prior to installation, if desired). Let me know if you have any questions about the new beta code. Additional minor changes will be made for the next production release. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft Digest, Vol 205, Issue 18
Wayne, Does this mean my FD plans to hang a KX3/KXPA100 off of a shared tribander with triplexer and BPFs with a couple of K3s is a bad idea? Time to make different plans? The KX3 is a treat for HF contesting in a single radio setup. (SOTA radio, microwave IF radio, and HF contest radio all in one? I've been seriously spoiled!) Thanks and best regards, Drew n7da > > Message: 8 > Date: Fri, 28 May 2021 09:28:34 -0700 > From: Wayne Burdick > To: elecraft Reflector > Subject: [Elecraft] Elecraft K4 now in Rob Sherwood's RX performance > table > Message-ID: <6db64ad9-da8a-4f9e-a796-4ec087f29...@elecraft.com> > Content-Type: text/plain; charset=us-ascii > > Sherwood has posted his measurements of the K4D's receiver performance in his > table: > >http://www.sherweng.com/table.html > > We're quite pleased with his test results, which confirm that the K4/K4D is > near the top of its class (direct-sampling SDRs). A K4HD would provide > somewhat higher dynamic range for those stations in extreme signal > environments, but the vast majority of operators will find that the K4/K4D > more than meets their needs. > > I'd like to highlight a few important items in Rob's chart. > > First, the K4D has a high 2 and 20 kHz dynamic range value of 101 dB. Because > it's a direct-sampling radio, this figure will hold at nearly all offsets > from strong signals. Second is the block dynamic range number (128 dB), > higher than almost every other "pure" SDR measured. Finally, there's the LO > noise (local oscillator; 148 to 155 dB) -- again, very favorable compared to > all competing SDRs. This is an important number correlated with reciprocal > mixing dynamic range (RMDR). > > Taken together these demonstrate that the K4D will offer excellent > performance in crowded band conditions. > > Inevitably a question will arise regarding the chart position of the K4D > relative to a couple of our other transceivers: the K3S and KX3. There's a > bit of "apples to oranges" in both comparisons. > > The K3S uses a superhet receiver architecture. The K4HD will provide a > receive setting that emulates this superhet performance when and if it's > needed. But the "pure" (direct sampling) method used by the K4 (all models) > has many advantages. One is the elimination of artifacts associated with > crystal filters. Another is that, as a pure SDR, the K4 has a far more > flexible architecture. We'll be able to provide updates to the receive and > transmit digital signal chains that cannot be added to a superhet like the > K3S or its competitors. > > The KX3 is another Elecraft radio high on Sherwood's chart. Its performance > is excellent, especially at its price point. But its numbers relative to the > K4 are somewhat misleading, as hinted at by Rob's footnotes. The KX3 uses a > quadrature downsampling architecture, which digitally samples at baseband > audio rather than at RF. This is ideal for a radio like the KX3 that has to > have very low current drain for portable operations. The K4 uses a > direct-samping architecture that requires a higher power digital signal > chain, resulting in important benefits over quadrature downsampling including > much higher and more consistent opposite sideband image suppression and > 2nd-order intermod rejection. So the two are really designed for different > applications. > > Overall, this first independent test of the K4 validates the performance of > our SDR architecture. Feel free to send us any further performance questions. > > 73, > Wayne > N6KR > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 & KPA1500 ERR KP 1
Dear OMs and YLs, Can someone please advise me as to what ERR KP 1 indicates.Using my K3 and KPA 1500 on Six meters FT8 I get this message only while transmitting on the K3 screen with no indication of a problem on the KPA 1500 . If I place the KPA 1500 into standby mode the message does not appear.I do not use ALC.There seems to be no reference to this error message in either manual. The amplifier seems to be working just fine. If I lower the K3 drive (8W) drive to the amplifier so that the K3 KPA internal amp is not engaged but the KPA 1500 is in operate mode, the problem does not occur. Should I increase the power to 12 W from the K3 with KPA 1500 in operate mode the error code does appear.Again the KPA 1500 seems to operate perfectly.The K3 at 95W with KPA 1500 in STBY does not result in the KPA 1 message. What does ERR KPA 1 indicate on the K3 screen? Thank you for your help. 73 Doug EI2CN SWR 1.1 to 1 -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Richard Sent: Friday 28 May 2021 20:35 To: elecraft@mailman.qth.net Subject: [Elecraft] K3s Power Selection In the Config Menu: PWR SET If set to PER-BAND, the power level is saved on each band. This is especially useful with external amplifiers. Mine is set to PER-BAND. If a KPA500 is connected to the K3S via the ACC cable (as mine is), two sets of per-band power settings are saved: one for “barefoot” operation, one for use with the amp. Where and how do I save and then access these two savings? Are the somehow automatically selected? In my case I want to save 100 watts for "barefoot" operation and 25 watts for amplifier operation. I've tried using Quick Memories 1-9 for bands — which works fine — and Quick Memories M1 and M2 for the two power settings for each band — which does NOT work. What's the right way to do this? Richard Kunc ~ W4KBX __ 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 turnb...@net1.ie __ 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
