Re: [Elecraft] Synchronized and stable GPS phase lock for KX3, K3 and XV transverters
A question regarding the DOCXO, double ovenized crystal oscillator to Chuck, W7CS. I'm completely new to this, but after having looked at a few in ebay, I see that they have an input for frequency control. Do you use them as is, or do you calibrate them by setting the control voltage? And how much variation in frequency is typical to achieve with this control voltage, ie how much off frequency can they be if unadjusted? Thanks, - Sverre, LA3ZA K2 #2198, K3 #3391, LA3ZA Blog: http://la3za.blogspot.com, LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html -- View this message in context: http://elecraft.365791.n2.nabble.com/Re-Synchronized-and-stable-GPS-phase-lock-for-KX3-K3-and-XV-transverters-tp7592455p7592461.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] K2 KPA100 fan replacement?
Prompted by the recent thread on K3 fan replacement in order to make it more quiet, I wonder if anyone has done anything similar on the KPA100? - Sverre, LA3ZA K2 #2198, K3 #3391, LA3ZA Blog: http://la3za.blogspot.com, LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-KPA100-fan-replacement-tp7592462.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] K2 KPA100 fan replacement?
Hi Sverre, I did have a look at this but discovered that the options for alternative 30mm fans are limited compared with larger sized case fans. There's no Noctua 30mmx10mm fan. The Evercool fan in the KPA100 runs at 8000rpm. I suspect these smaller fans are inherently noisier. The timbre of the sound they emit in full flight sounds harmonic rich and higher pitched, so it's more noticeable if you have well preserved high frequency auditory acuity :). I use my K2/100 for QRP only, because if I work CW at 20W or more, the fan runs pretty much continuously on Tx. 73, John VK7JB __ 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] Synchronized and stable GPS phase lock for KX3, K3 and XV transverters
Have a look at this, Sverre, it will tell you all you want to know. http://www.ve2azx.net/technical/MV89A-1.pdf 73 de David G4DMP In a recent message, Sverre Holm (LA3ZA) la...@nrrl.no writes A question regarding the DOCXO, double ovenized crystal oscillator to Chuck, W7CS. I'm completely new to this, but after having looked at a few in ebay, I see that they have an input for frequency control. Do you use them as is, or do you calibrate them by setting the control voltage? And how much variation in frequency is typical to achieve with this control voltage, ie how much off frequency can they be if unadjusted? -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ 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] Latest battery arrangement for KX1
I ordered a new top cover for my KX1 and installed two LiPo batteries into it. Though the exact model of battery is no longer available I'm sure there are others that will fit: http://www.ae5x.com/blog/qrp/qrp-equipment/elecraft-kx1/ John AE5X http://www.ae5x.com/blog __ 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 KPA100 fan replacement?
Remember that there is an option on the KPA100 to have the fan run continuously at low speed. This keeps it cooler and cuts down on number of times it kicks into high gear. Still sounds like a 747 winding up for take-off in those instances, but it does help. Maybe a large, quiet, external muffin fan lying on top would add enough cooling to prevent it from running? 73 de dave ab9ca/4 On 8/23/14 6:31 AM, John Farmer wrote: Hi Sverre, I did have a look at this but discovered that the options for alternative 30mm fans are limited compared with larger sized case fans. There's no Noctua 30mmx10mm fan. The Evercool fan in the KPA100 runs at 8000rpm. I suspect these smaller fans are inherently noisier. The timbre of the sound they emit in full flight sounds harmonic rich and higher pitched, so it's more noticeable if you have well preserved high frequency auditory acuity :). I use my K2/100 for QRP only, because if I work CW at 20W or more, the fan runs pretty much continuously on Tx. 73, John VK7JB __ 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 ho13d...@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] K2 KPA100 fan replacement?
John, That is not normal. You might want to check a couple things. First, connect an external wattmeter and monitor the actual output - set the power control at 50 watts and see how much power you actually have on CW keydown. If it is much higher (greater than 100 watts), you have a problem with the KPA100 wattmeter. Continued operation with that condition present will cause your base K2 PA transistors to be stressed and will fail sometime soon. Even if you operate with the power knob set below 11 watts, the base K2 PA will still be stressed because the base PA is putting out the maximum power that it can develop - often exceeding 18 watts. Secondly, check the menu setting for CAL TPA - turn power off and wait at least 1/2 hour to allow things to cool to ambient. Then power on and check the setting of CAL TPA - adjust to the ambient temperature in degC if necessary. If you are doing CW (or data modes) with a high transmit to receive ratio, such as during a hot and heavy contest, you can set the fan to LO-HI so it will run at low speed all the time and keep things cooler - that means the times it switches to high speed will be reduced. In normal mode, the fan does not run until the CAL TPA temperature (and the heatsink if CAL TPA is properly calibrated) reaches 40 degC and will turn off when the temperature drops to 36 degC. 73, Don W3FPR On 8/23/2014 7:31 AM, John Farmer wrote: it's more noticeable if you have well preserved high frequency auditory acuity :). I use my K2/100 for QRP only, because if I work CW at 20W or more, the fan runs pretty much continuously on Tx. __ 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] Changing the subject line
Some lists use a system I recommend, which is to modify the subject line but include the former subject. Example: Subject: [Elecraft] Best Listserv Practices (was: Changing the subject line) And with respect to changing subject lines, I sure appreciate people doing that when replying to an item from a Digest. There’s no subject line less useful than something like this: Subject: Re: [Elecraft] Elecraft Digest, Vol 124, Issue 10 73, Lew N6LEW On Aug 21, 2014, at 2:10 PM, Fred Jensen k6...@foothill.net wrote: I've gotten several replies to the question, and based on the answers they're from people who know. I promised to post the answer: Yes. Depending on the email client [and possibly how the user has it set up to thread emails], changing the subject line *could* do something like start a new thread, especially if the email header block is changed. OTOH, if the content of the email has drifted far enough from the subject that changing the subject makes sense, by all means do. A string of threaded emails where the subject says nothing about the content isn't real useful. __ 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] Interface K-Line and microHAm microKEYER II
I am in the process of interfacing my new microKeyer II to my K3, P3 and KPA500. I would like to correspond with someone that has an operational system of this type. I believe I might need an additional Y-cable for the RS-232 interface. Please respond off line to orville @ rubyglass.com. Thanks, Orville, K5VWW __ 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] Interface K-Line and microHAm microKEYER II
There is no Y cable needed for the RS-232 interface. The RS-232 connector from the microHAM cable connects to the P3, the P3 connects to the K3 via the Elecraft RS-232 cable supplied with the P3. For best results configure the K3, P3, microHAM Router and your logging software to operate and 38.400 bps. *Remember* if you ever update firmware in the P3 or K3 connect the P3 directly to a hardware serial port or other USB to serial adapter. Firmware updates are not supported through the microHAM interfaces due to (1) polling by Router and (2) the need for a hardware reset in the K3/P3. The only Y cable needed is for the K3 ACC jack if you plan to operate using FSK and/or use PTT 2 (the second PTT output) from microKEYER. 73, ... Joe, W4TV On 2014-08-23 12:34 PM, Orville wrote: I am in the process of interfacing my new microKeyer II to my K3, P3 and KPA500. I would like to correspond with someone that has an operational system of this type. I believe I might need an additional Y-cable for the RS-232 interface. Please respond off line to orville @ rubyglass.com. Thanks, Orville, K5VWW __ 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
[Elecraft] Data Mode Sideband
Guru's, Trying to get a handle on a problem with frequency reporting in MMTTY. Not an operational issue, I just don't take any notice of MMTTY frequencies. In AFSK A mode they are incorrect. The following has become apparent, albeit undocumented. Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. Apparently not the case. It looks like keying is reversed but shifted in frequency on the waterfall by one keying shift value eg 170Hz. However, whilst in data mode selection the sideband indicator does change from LSB to USB using ALT. Mode DATA A normal USB. Using the ALT function does indeed swap sidebands. Can anyone confirm or deny this observation and is this the way it is intended to function? Regards, Mike VP8NO __ 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 vfo b knob
3 days after I e mailed Elecraft it arrived. No charge. Fantastic service. Know any JA company that does that? Also why I'm all Elecraft. K3, KPA500 KAT500. Probably when something new I want appears with the Elecraft name my order will be on it's way. 54 yr.s an active ham I can say this is as good as it gets. K9IL __ 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] anyone using K3 and LP-100A?
Hello If anyone using LP-100A wattmeter with the K3, please let me know to ask you something about power readings Thanks, Jorge CX6VM/CW5W --- Este mensaje no contiene virus ni malware porque la protección de avast! Antivirus está activa. 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 arch...@mail-archive.com
Re: [Elecraft] Data Mode Sideband
Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. It is. It looks like keying is reversed but shifted in frequency on the waterfall by one keying shift value eg 170Hz. However, whilst in data mode selection the sideband indicator does change from LSB to USB using ALT. The MARK frequency in the K3 does not change - it's still 2125. That results in a displayed SPACE frequency. Wayne/Lyle, you probably want to offset MARK by Shift when in AFSK REV (and maybe FSK REV). Remember, MARK is always the higher RF frequency so the tones have to be exchanged in AFSK REV and both mark/direction of the shift changed in FSK REV. 73, ... Joe, W4TV On 2014-08-23 2:03 PM, Mike Harris wrote: Guru's, Trying to get a handle on a problem with frequency reporting in MMTTY. Not an operational issue, I just don't take any notice of MMTTY frequencies. In AFSK A mode they are incorrect. The following has become apparent, albeit undocumented. Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. Apparently not the case. It looks like keying is reversed but shifted in frequency on the waterfall by one keying shift value eg 170Hz. However, whilst in data mode selection the sideband indicator does change from LSB to USB using ALT. Mode DATA A normal USB. Using the ALT function does indeed swap sidebands. Can anyone confirm or deny this observation and is this the way it is intended to function? Regards, Mike VP8NO __ 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] anyone using K3 and LP-100A?
I have that combination here. What are you interested in? 73, matt W6NIA On Sat, 23 Aug 2014 15:24:44 -0300, you wrote: Hello If anyone using LP-100A wattmeter with the K3, please let me know to ask you something about power readings Thanks, Jorge CX6VM/CW5W --- Este mensaje no contiene virus ni malware porque la protección de avast! Antivirus está activa. 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 mzil...@roadrunner.com Matt Zilmer, W6NIA -- Give me six hours to chop down a tree and I will spend the first four sharpening the axe. -A. Lincoln __ 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] anyone using K3 and LP-100A?
Yes - and they track within the respective tolerance values if the KAT-3 (internal tuner) is bypassed. 73, ... Joe, W4TV On 2014-08-23 2:24 PM, Jorge Diez - CX6VM wrote: Hello If anyone using LP-100A wattmeter with the K3, please let me know to ask you something about power readings Thanks, Jorge CX6VM/CW5W --- Este mensaje no contiene virus ni malware porque la protección de avast! Antivirus está activa. 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] Data Mode Sideband
Not so sure. I monitored the TX frequency on another RX and the only change was the slight shift I mentioned, not what would, in my case (1445Hz Mark) be approx 3kHz. Using DATA A, which really does swap sideband results in a near 3k frequency shift. Regards, Mike VP8NO On 23/08/2014 15:27, Joe Subich, W4TV wrote: Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. It is. __ 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] Data Mode Sideband
Mike, Do you have MMTTY set for 1445Hz Mark *and* the K3. Hold PITCH button to check/change. That would make a difference in AFSK A, but not in DATA A mode 73, Don W3FPR On 8/23/2014 3:00 PM, Mike Harris wrote: Not so sure. I monitored the TX frequency on another RX and the only change was the slight shift I mentioned, not what would, in my case (1445Hz Mark) be approx 3kHz. Using DATA A, which really does swap sideband results in a near 3k frequency shift. Regards, Mike VP8NO On 23/08/2014 15:27, Joe Subich, W4TV wrote: Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. It is. __ 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] Data Mode Sideband
In AFSK A the K3 displays the actual Mark frequency on its dial, not the suppressed carrier or BFO frequency as it does in DATA A. I believe what is happening is the following (this is the same as what Joe stated, just in different words and using a different PITCH setting): In normal AFSK A, if the PITCH setting is 1445 Hz, the two audio tones are at 1445 Hz Mark and 1615 Hz Space. In AFSK A - REV, the K3's dial still displays a frequency 1445 Hz different from the suppressed carrier frequency (1445 Hz higher in USB vs. 1445 Hz lower in LSB). However, in REV mode the tone that is 1445 Hz away from the suppressed carrier is the Space frequency, not the Mark frequency (i.e. it is the lower of the two frequencies, not the higher). This difference results in a 170 Hz discrepancy between the dial frequency and the actual Mark frequency (the higher of the two frequencies at RF). To put it another way, the K3's dial is reporting the Space (lower) frequency in AFSK A - REV instead of the amateur standard Mark (higher) frequency. If the two tones in normal AFSK A are 1445 Hz Mark and 1615 Hz Space, then in AFSK A - REV the two tones should be 1615 Hz Mark and 1445 Hz Space, and the displayed dial frequency should be 1615 Hz above the suppressed carrier, not 1445 Hz higher. 73, Rich VE3KI VP8NO wrote: Not so sure. I monitored the TX frequency on another RX and the only change was the slight shift I mentioned, not what would, in my case (1445Hz Mark) be approx 3kHz. Using DATA A, which really does swap sideband results in a near 3k frequency shift. Regards, Mike VP8NO On 23/08/2014 15:27, Joe Subich, W4TV wrote: Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. It is. __ 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] Synchronized and stable GPS phase lock for KX3, K3 and XV transverters
Everything you need to know for setting up a surplus OCXO: http://www.kl7uw.com/10MHzREF.jpg one caveat the power cube was a mistake as it output a 0.5v triangular wave at 120-Hz riding on the 12vdc output -not good. So use a well filtered-regulated 12v PS instead (battery optional). http://www.kl7uw.com/Rubidium.htm for details Big heat sink is for the Rubidium standard and not needed for the OCXO. 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
Re: [Elecraft] Data Mode Sideband
Rich is correct. The K3 shifts the carrier frequency between AFSK and AFSK REV (of FSK and FSK REV) but fails to account for the the exchange of mark/space tones. To be rigorous, MMTTY and the K3 should probably use 1275 Hz Mark in AFSK (lower tone = higher RF frequency) and 1445 Hz Mark in AFSK REV (higher tone = higher RF frequency). 73, ... Joe, W4TV On 2014-08-23 3:55 PM, Richard Ferch wrote: In AFSK A the K3 displays the actual Mark frequency on its dial, not the suppressed carrier or BFO frequency as it does in DATA A. I believe what is happening is the following (this is the same as what Joe stated, just in different words and using a different PITCH setting): In normal AFSK A, if the PITCH setting is 1445 Hz, the two audio tones are at 1445 Hz Mark and 1615 Hz Space. In AFSK A - REV, the K3's dial still displays a frequency 1445 Hz different from the suppressed carrier frequency (1445 Hz higher in USB vs. 1445 Hz lower in LSB). However, in REV mode the tone that is 1445 Hz away from the suppressed carrier is the Space frequency, not the Mark frequency (i.e. it is the lower of the two frequencies, not the higher). This difference results in a 170 Hz discrepancy between the dial frequency and the actual Mark frequency (the higher of the two frequencies at RF). To put it another way, the K3's dial is reporting the Space (lower) frequency in AFSK A - REV instead of the amateur standard Mark (higher) frequency. If the two tones in normal AFSK A are 1445 Hz Mark and 1615 Hz Space, then in AFSK A - REV the two tones should be 1615 Hz Mark and 1445 Hz Space, and the displayed dial frequency should be 1615 Hz above the suppressed carrier, not 1445 Hz higher. 73, Rich VE3KI VP8NO wrote: Not so sure. I monitored the TX frequency on another RX and the only change was the slight shift I mentioned, not what would, in my case (1445Hz Mark) be approx 3kHz. Using DATA A, which really does swap sideband results in a near 3k frequency shift. Regards, Mike VP8NO On 23/08/2014 15:27, Joe Subich, W4TV wrote: Mode AFSK A normal LSB. I assumed that if by using the ALT function and consequently switching to TX DATA REV that the sideband was switched from LSB to USB. It is. __ 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] K2 KPA100 fan replacement?
Thanks Don. I appreciate the tips. The power and ambient temp calibrations check out OK. I'll try changing the fan setting and see what that does. I work only CW and once the rig gets up to the temperature threshold, after an over or two, the fan stays pretty busy thereafter. Leaving the fan on low between transmissions may do the trick. Cheers, John VK7JB On 23 Aug 2014, at 23:48, Don Wilhelm w3...@embarqmail.com wrote: John, That is not normal. You might want to check a couple things. First, connect an external wattmeter and monitor the actual output - set the power control at 50 watts and see how much power you actually have on CW keydown. If it is much higher (greater than 100 watts), you have a problem with the KPA100 wattmeter. Continued operation with that condition present will cause your base K2 PA transistors to be stressed and will fail sometime soon. Even if you operate with the power knob set below 11 watts, the base K2 PA will still be stressed because the base PA is putting out the maximum power that it can develop - often exceeding 18 watts. Secondly, check the menu setting for CAL TPA - turn power off and wait at least 1/2 hour to allow things to cool to ambient. Then power on and check the setting of CAL TPA - adjust to the ambient temperature in degC if necessary. If you are doing CW (or data modes) with a high transmit to receive ratio, such as during a hot and heavy contest, you can set the fan to LO-HI so it will run at low speed all the time and keep things cooler - that means the times it switches to high speed will be reduced. In normal mode, the fan does not run until the CAL TPA temperature (and the heatsink if CAL TPA is properly calibrated) reaches 40 degC and will turn off when the temperature drops to 36 degC. 73, Don W3FPR On 8/23/2014 7:31 AM, John Farmer wrote: it's more noticeable if you have well preserved high frequency auditory acuity :). I use my K2/100 for QRP only, because if I work CW at 20W or more, the fan runs pretty much continuously on Tx. __ 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] no DDS VFO output/KX1
Hello All: My first time to post to this list. I am building KX1 S/N 2825 and have progressed to page 43 Alignment and Test Part 2 with no problems. I have completed tests through page 44-keyer. I have not been able to proceed to the Receiver Alignment section, page 45, because I can not discern any signal from the DDS VFO, so not able to hear any signals, on either 20m or 40m. My question is this: should I be able to see the VFO signal at pin 19 of U2? I am using an old TEK 422 scope with 10 x probe. I see nothing at pin 19 or at pin 3 of Z2 the 50 mhz clock. At pin 3 of Z2, clock output, I measure gnd (with power off, of course). I also measure gnd at pin 4 of Z2, but also see 2.7 vdc when the unit is powered up. No VFO or MCLK signals are visible. This is confusing(!) I’m kinda stymied at this point, and any suggestions are welcome! Should I be able to hear the VFO signal on an outboard receiver? Should I be able to see the VFO signal at some point, and where is the best measurement point? Another note: I am using the directions from Don Wilhelm’s letter of 4 May, 2011 regarding replacement of components for KXB3080 option prior to installing the option. This includes C27,C26,C1,T2. He will know what I am referring to. Sorry to run on for so long. Any help or suggestions, please? Thanks for the bandwidth. 73 Ron Dickerson WA7BME __ 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] KX1 Battery Pack
For beaucoup power from a KX1, you can use a 4S1P A123 pack, and even recharge it remotely with a small solar panel and a Genasun controller. Mine puts out well over 5 watts with this setup, however Wayne has said this much power can endanger the finals. So far, no problems. It is a bit bulky, but pretty light. This way, you maintain the ability to use internal Lithium AAs when you positively need the lightest possible setup. 73 Eric WD6DBM Sent from Yahoo Mail on Android __ 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] no DDS VFO output/KX1
Ron I have no comments about the KX1. However I do seem to recall the Tek 422 has a 30 MHz bandwidth with a P6006 probe. 73 Fred, AE6QL -Original Message- From: wa7...@citlink.net Sent: Aug 23, 2014 3:50 PM To: elecraft@mailman.qth.net Subject: [Elecraft] no DDS VFO output/KX1 Hello All: My first time to post to this list. I am building KX1 S/N 2825 and have progressed to page 43 Alignment and Test Part 2 with no problems. I have completed tests through page 44-keyer. I have not been able to proceed to the Receiver Alignment section, page 45, because I can not discern any signal from the DDS VFO, so not able to hear any signals, on either 20m or 40m. My question is this: should I be able to see the VFO signal at pin 19 of U2? I am using an old TEK 422 scope with 10 x probe. I see nothing at pin 19 or at pin 3 of Z2 the 50 mhz clock. At pin 3 of Z2, clock output, I measure gnd (with power off, of course). I also measure gnd at pin 4 of Z2, but also see 2.7 vdc when the unit is powered up. No VFO or MCLK signals are visible. This is confusing(!) I’m kinda stymied at this point, and any suggestions are welcome! Should I be able to hear the VFO signal on an outboard receiver? Should I be able to see the VFO signal at some point, and where is the best measurement point? Another note: I am using the directions from Don Wilhelm’s letter of 4 May, 2011 regarding replacement of components for KXB3080 option prior to installing the option. This includes C27,C26,C1,T2. He will know what I am referring to. Sorry to run on for so long. Any help or suggestions, please? Thanks for the bandwidth. 73 Ron Dickerson WA7BME __ 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 fptowns...@earthlink.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] no DDS VFO output/KX1
Ron, Welcome to the Elecraft reflector. If your 'scope is capable of seeing a 50 MHz signal of 100 mV peak to peak amplitude, yes you should see a good 50 MHz signal from the oscillator Z2. If you have no oscillator there, and you measure 2.7 volts in Z2 pin 4, you may have a bad oscillator - no oscillator, the DDS will not work. If you put a short antenna on the oscillator (Z2 pin 3) you should be able to hear it in a receiver with its antenna located a short distance from the added antenna wire. If you indeed do not have an oscillator signal, it is likely a warranty repair and you should contact supp...@elecraft.com to request an RSA. But make sure the leads of the components mounted in the vicinity do not have solder bridges that is shorting something to ground or another signal line. Such builder errors are not warranty repairs. There is nothing in the KXB3080 'shortcut' instructions that would interfere with the DDS signal. If you doubt the capability of your scope, use an RF probe to look for the oscillator and/or DDS signal. Measured on an RF Probe you should have at least 70 mV signal at U2 pin 19. Check for a signal at pin 20 too - if you have a signal at pin 20, check your work for solder bridges and other errors - like wrong value components at L4, L5, C39, C51, and C52 - check especially C52 to be sure it is 22pF (220) and not the 220pF (221) capacitor, those marking are difficult to see. 73, Don W3FPR On 8/23/2014 6:50 PM, wa7...@citlink.net wrote: Hello All: My first time to post to this list. I am building KX1 S/N 2825 and have progressed to page 43 Alignment and Test Part 2 with no problems. I have completed tests through page 44-keyer. I have not been able to proceed to the Receiver Alignment section, page 45, because I can not discern any signal from the DDS VFO, so not able to hear any signals, on either 20m or 40m. My question is this: should I be able to see the VFO signal at pin 19 of U2? I am using an old TEK 422 scope with 10 x probe. I see nothing at pin 19 or at pin 3 of Z2 the 50 mhz clock. At pin 3 of Z2, clock output, I measure gnd (with power off, of course). I also measure gnd at pin 4 of Z2, but also see 2.7 vdc when the unit is powered up. No VFO or MCLK signals are visible. This is confusing(!) I’m kinda stymied at this point, and any suggestions are welcome! Should I be able to hear the VFO signal on an outboard receiver? Should I be able to see the VFO signal at some point, and where is the best measurement point? Another note: I am using the directions from Don Wilhelm’s letter of 4 May, 2011 regarding replacement of components for KXB3080 option prior to installing the option. This includes C27,C26,C1,T2. He will know what I am referring to. Sorry to run on for so long. Any help or suggestions, please? __ 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] no DDS VFO output/KX1
Fred, What that means is that at 30 MHz, the amplitude is reduced by 3 dB. Usually, such a 'scope is useful for determining if there is a signal (assuming the 'scope has adequate vertical sensitivity), but should not be used to measure signal voltage with accuracy above about 10 MHz. 73, Don W3FPR On 8/23/2014 7:47 PM, Fred Townsend wrote: Ron I have no comments about the KX1. However I do seem to recall the Tek 422 has a 30 MHz bandwidth with a P6006 probe. 73 Fred, AE6QL __ 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] distorted FM audio
I have just started using 2 metres FM on my K3 #685. The receive audio is rough and distorted, it sounds as if its being clipped. The FM Inrad filter is .in slot 1 and FL1 is showing. By comparison, my Yaesu FT3000 and FT817 are qute undistorted on the same signals K3 SSB audio is fine. Can anyone assist as it is not pleasant to listen to. Chris VK2ACD __ 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] distorted FM audio
On your filter setup in the K3 utility, set Freq Offset to zero to start. Set bandwidth to 13, and check FM Enable. Also make sure that the FM filter really IS in slot 1, and that it is properly seated. 73, and good luck Guy K2AV On Sat, Aug 23, 2014 at 9:25 PM, Chris Meagher acdmeag...@gmail.com wrote: I have just started using 2 metres FM on my K3 #685. The receive audio is rough and distorted, it sounds as if its being clipped. The FM Inrad filter is .in slot 1 and FL1 is showing. By comparison, my Yaesu FT3000 and FT817 are qute undistorted on the same signals K3 SSB audio is fine. Can anyone assist as it is not pleasant to listen to. Chris VK2ACD __ 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 k2av@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] Wanted - KXPA100 KXAT100
Anyone interested in selling their KXPA100 KXAT100 with cables and manuals? 73, Steve, N4EUK __ 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] SSB net announcement
The weekly SSB net is Sunday at 1800Z on 14.3035 MHz. Join us. 73, Phil, NS7P __ 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
