Re: [Elecraft] K3 LINE IN
On 5/22/2023 3:14 PM, Jorge Diez - CX6VM wrote: seems is something else Another thing that Windoze has done more than once on an upgrade is to change sampling rate. It SHOULD be 48 kHz Stereo. Check both recording and playback. 73, Jim K9YC __ 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] Power spike early K3
My K3s has this problem, but it only happens intermittently. When driving the KPA1500, there would be a spike of about 70w. Drive level was between 20 and 25 watts. The K3s spent three months at Elecraft and they could not fix it. I finally discovered two things that caused the power spike: 1. Exiting the CW QRQ mode; either by turning on RIT or by using the menu. 2. Narrowing the passband from XFIL 3 to XFIL 4 (1000 Hz to 400 Hz in my case.), either with the XFIL button or the Width control. These appear to be the only things that cause the power spike. This leads me to believe it's a firmware problem (v 5.67, the most recent). I tried going back to an earlier FW version, but could not figure out how to load it. It doesn't look like there will be any new FW updates for the K3 series. --- 73, Mike Cizek WØVTT -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of N2TK via Elecraft Sent: Saturday, 20 May, 2023 15:51 To: m...@sj2w.se; elecraft@mailman.qth.net Subject: Re: [Elecraft] Power spike early K3 I had the same problem with the K3/KPA1500 combination. I recalibrated the K3. Then I made sure I don't run the K3 at exactly 5W or 50W. The problem has not reappeared.N2TK, Tony -Original Message- From: Mikael Larsmark To: elecraft@mailman.qth.net Sent: Sat, May 20, 2023 3:45 am Subject: [Elecraft] Power spike early K3 Hi, We have an early serial K3 which has got an issue with power spikes. I have done a TX gain calibration without it making a difference. The spike happens mainly when you have changed to a new band and during the first transmission. After that the spike is a lot smaller and not much of an issue. Anybody have any ideas of what this could be because of? It kind of makes it impossible to run a solid state amplifier on the radio and probably not good for the tube amplifiers either. /Mike, SJ2W __ 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 tony@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 mgci...@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
Re: [Elecraft] K3 Rotary encoder
N5NA has written an excellent account of replacing the small push-button encoders. https://www.n5na.net/s9y/index.php?/archives/26-Replacing-Elecraft-K3-Push-Button-Encoders.html I have replaced all of these encoders in several K3 radios over the past 5 years. It is not a job for the faint-hearted. However, if you take your time and cut the mounting pins of the encoders before you unsolder them, then you will succeed. Do not attempt to remove the LED board. Make sure you wick out the mounting holes thoroughly or you will have difficulty installing the new encoders. Good luck 73 Gary, N7IR __ 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 LINE IN
hello Jim thanks for the help I verify and both Windows and WSJT are using USB audio CODEC, so seems is something else thanks! 73, Jorge El lun, 22 may 2023 a las 16:20, Jim Brown () escribió: > On 5/22/2023 9:18 AM, Jorge Diez - CX6VM wrote: > > Any idea what is wrong? > > Jorge, > > One thing with symptoms like this that has happened to me several times > is that when things are shifted around, Windows will choose the mic > built into my laptop to feed WSJT-X or JTDX. If that's the problem, the > fix is to go into the Windows sound setup and change it back to your > Tascam. > > 73, Jim K9YC > __ > 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 cx6vm.jo...@gmail.com > -- 73, Jorge CX6VM/CW5W __ 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 T1 auto tuner question
The T1 specs say that it should function with input power as low as 0.5 watts. An 8 dB attenuator at the output of your 4-5 watt QRP rig should still give you close to 0.5 watt into the T1, and the attenuator acts as a buffer that diminishes the reflected power from the high SWR load. Tune with the attenuator in place, and then remove it after the match with the T1 is achieved. https://www.rfcafe.com/references/electrical/vswr-reduction.htm https://www.rfcafe.com/references/calculators/vswr-return-loss-conversion-calculator.htm According to the 2nd link, an 8 dB attenuator would turn a 20:1 SWR at the load into less than 1.4:1 at the output of the rig. HUGE CAVEAT: An attenuator designed for 8 dB only gives the design value reduction in reflected power for input and load impedances that match the design of the attenuator. An attenuator designed for 8 dB with 50 ohm input and output won't give 8 dB with radically different impedances. That being said, it doesn't take much attenuation to help and I think it would be worth a try. I can't think of any other way to do what you want unless the T1 can be manually stepped through a match and you monitor the input with a VNA (NanoVNA, for example). There are a lot of T-network attenuator calculators out there ... here is one of them. https://www.pasternack.com/t-calcualtor-tee-attn.aspx 73, Dave AB7E On 5/22/2023 11:52 AM, n...@comcast.net wrote: I have a T1 that I have used for several years. I recently purchased a QCX-mini, and an SW-3B. I normally use my K2, KX2 or KX3 for portable operations, but occasionally I like to use something different for QRP CW. Both the QCX-mini and the SW-3B require a 2.0 or less SWR. The documentation for SW-3B says that operating at any SWR over 2.0 will damage the radio. The outputs varies with voltage, but usually runs at 4-5 watts with a 12V supply. If I attach the T1 to that rig, and perhaps the QCX-mini as well, it will require the rig attached to present a constant carrier to tune. This seems to eliminate using an auto tuner with the SW-3B at a minimum in that configuration. Can someone tell me how I might get the T1 to tune in the field with something other than the rig. If I could trigger it to tune, then I could attach to the radio after the tune cycle. My plan is to use a resonant antenna, but that may not always be possible, especially with a three band rig like the SW-3B. Thanks, Terry, N7TB __ 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 ab7e...@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
Re: [Elecraft] K3 LINE IN
On 5/22/2023 9:18 AM, Jorge Diez - CX6VM wrote: Any idea what is wrong? Jorge, One thing with symptoms like this that has happened to me several times is that when things are shifted around, Windows will choose the mic built into my laptop to feed WSJT-X or JTDX. If that's the problem, the fix is to go into the Windows sound setup and change it back to your Tascam. 73, Jim K9YC __ 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] Elecraft T1 auto tuner question
I have a T1 that I have used for several years. I recently purchased a QCX-mini, and an SW-3B. I normally use my K2, KX2 or KX3 for portable operations, but occasionally I like to use something different for QRP CW. Both the QCX-mini and the SW-3B require a 2.0 or less SWR. The documentation for SW-3B says that operating at any SWR over 2.0 will damage the radio. The outputs varies with voltage, but usually runs at 4-5 watts with a 12V supply. If I attach the T1 to that rig, and perhaps the QCX-mini as well, it will require the rig attached to present a constant carrier to tune. This seems to eliminate using an auto tuner with the SW-3B at a minimum in that configuration. Can someone tell me how I might get the T1 to tune in the field with something other than the rig. If I could trigger it to tune, then I could attach to the radio after the tune cycle. My plan is to use a resonant antenna, but that may not always be possible, especially with a three band rig like the SW-3B. Thanks, Terry, N7TB __ 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 LINE IN
hello I have a remote setup, K3/100 at the station, K3/o mini at home, TASCAM US-125M for digital Usually I have TASCAM LINE know at the second line level (it have 9 lines levels) and K3 AF knob at the second point level I needed to disconnect all the equipments last week. Then assembled all in a new desk but now I notice that to see station on the WSJT-X bandscope i need to increase K3 AF knob to the 4 point level and TASCAM to the 6-7 line level Seems is coming less audio from the K3 Any idea what is wrong? thanks in advance! -- 73, Jorge CX6VM/CW5W __ 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] AX-1 (SOLD)
Went really fast. Obviously, I should have priced it higher ;^) -- 73, Pete N4ZR __ 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 AX-1 Multiband Portable Antenna
At the CWOps dinner in Dayton, I won an Elecraft AX1 multiband portable whip antenna with the 40M extender, bipod and tripod adapter - all together costing $227 from Elecraft. Since the chances of my operating SOTA or POTA are somewhere between zero and some imaginary number, I'm offering the entire system, still in the original packaging from Elecraft, for $120 including shipping. If interested, please respond directly, off the reflector. -- 73, Pete N4ZR __ 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 - ERR DSE
Hello YLs and Oms, I am still struggling with my K3 and the ERR DSE. In rare cases I can switch on K3 completely and it runs stable. That let me assume, that the startup of µC, e.g. DSP, is not working correctly. Do you have any further hints to find out where the issue is located? Vy73 Harald DD0VS __ 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
