[Elecraft] K2 #5549 some questions/remarks
Hi, First of all Merry Christmas to all of you! Yesterday I went over to a friend and we did some quick tests on my new K2 (basic, no options yet). To be clear, everything has been aligned with basic tools, as in the user manual. Here are some things we noticed: 1. when looking at the transmitted signal using a spectrum analyser, the signal didn't seem as clean as we liked it. We didn't have time (it was the day before X-mas!) to really start counting the dB's, but on 30, 12 and 10 m we saw some signals around the main signal. Is there any chance we can get these bands 'cleaner' by further tweaking the filters? 2. Output power on 10m is OK low in the band, but when going higher up it decreases to a mere 1,5 W. Moreover the higher we go in the band the worse the transmitted spectrum gets (see above). Is it possible to set the filters so the complete 10m band can be used at a reasonable power? I know, for CW the low part of the band is the place to be, but I'd like to also install the SSB option. 3. When listening to a continuous signal (XG2 for example) there is some kind of a (digital) 'thump' in the audio everytime I turn RIT or VFO. Is this a normal behaviour or not? -- 73 Jurgen Geldhof ON5MF [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] my site:www.on5mf.be http://www.ktk.be our club: www.ktk.be http://www.ktk.be the Belgian Amateur Radio Society: www.uba.be http://www.uba.be ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 Problem
Has worked fine since building earlier this year but after returning from a trip via airline it starts transmitting as soon as I turn it on. Sending 'dahs with a key plugged in. When I plug in a key I hear its side tone as I normally would under the continuous series of dahs being transmitted. When first turned on I see the band is 14mhz then the display only shows led bars when it is sending. I will take it out of the case later in the week and see what I can find but wanted to see if anyone else had experienced the same problem and what was the fix? 73, Bob WA4MQW __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 Problem More Info
Should have added that the problem continues even with no key installed.. I have since reseated the MCU but it still continues to transmit dahs when I turn on the power with no key installed. Read in the archives that another ham had the same problem with his back in June and have sent him an email. Any suggestions are appreciated. 72, Bob WA4MQW Bob C. [EMAIL PROTECTED] wrote: Has worked fine since building earlier this year but after returning from a trip via airline it starts transmitting as soon as I turn it on. Sending 'dahs with a key plugged in. When I plug in a key I hear its side tone as I normally would under the continuous series of dahs being transmitted. When first turned on I see the band is 14mhz then the display only shows led bars when it is sending. I will take it out of the case later in the week and see what I can find but wanted to see if anyone else had experienced the same problem and what was the fix? 73, Bob WA4MQW __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 Frequency stability
Hello again and happy holidays! With regard to the K2 frequency stability... Several good points were raised and I realized that I wasn't adequately specific before. The drift I notice is primarily related to warmup and not during normal operation. I will perform the aforementioned test to confirm whether the instability is primarily in the BFO or PLL oscillator. However, the biggest drift occurs after the rig warms up. Heavy CW operating with the KPA100 brings the temperature very high and this large increase in temp is necessary to make the rig drift in frequency any more. Of course, the distinction between warmup and operating drift becomes academic if one turns on the rig from a cold start and start operating heavily right away. :) More commonly, I find that I operate outdoors or somewhere where ambient temperature is cold, run CW at 100 watts and then drift somewhat shortly after the cold start. Again, I suspect that this is due to warmup drift and not some large drift attributable to a malfunctioning temp- compensated PLL. On average, from 60 F to warmup the freq at which I zero beat WWV drifts down an extremely predictable 50 Hz. From normal operating temp to high temp (e.g. 100W CW operation sufficient to kick the KPA100 fan to high) the WWV zero beat frequency will move another 20-30 Hz, for a grand total of 80 Hz relative to a cold start. There is never any unpredictable change in zero beat frequency beyond this. Once the rig reaches full operating temperature the drift is never greater than 10 Hz. So it seems that the rig is operating within spec and I have nothing to worry about, save to calibrate things so that the radio zero beats WWV at operating temperature. I will confirm this by running the test to differentiate between PLL and BFO drift. Correct? Happy holidays! Adam, N1KO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Problem
Bob, This has to be a simple matter of a closed (or shorted) dash line. Does it behave normally with the key NOT plugged in? If so, check the key plug itself with your ohmmeter. If you find a short between the shell and either the tip or the ring, check the plug, the cable and your paddles. If it is the KXPD1 paddle, remove the rubber grips and see if the problem disappears - if so, you can spring the contact leaves up a bit, and if not, you may have to remove the cover over the hole and check to be certain the wires going to the rear of the jack are not touching the metal body. It is possible, but unlikely that the problem is inside the KX1. 73, Don W3FPR -Original Message- Has worked fine since building earlier this year but after returning from a trip via airline it starts transmitting as soon as I turn it on. Sending 'dahs with a key plugged in. When I plug in a key I hear its side tone as I normally would under the continuous series of dahs being transmitted. When first turned on I see the band is 14mhz then the display only shows led bars when it is sending. I will take it out of the case later in the week and see what I can find but wanted to see if anyone else had experienced the same problem and what was the fix? -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/601 - Release Date: 12/24/2006 11:31 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] some questions of W1
Hi Group, Christmas does give me some spare time to construct the serial cable to link the W1 with my notebook computer. I run W1, K2 with DL1 dummy load. I notice that the power reading of W1 on my notebook computer is higher than that calculated from the DC voltage measured on DL1. For example, I got a power indication of 15 watts from W1 through my note book. At the same time, the voltage across TP1 of the DL1 dummy load is 18.2 watts. Based on the power formula of DL1, the calculated power output should be 13.4 watts. Without changing any settings of my K2, I used LP100 instead of the W1 this time. I obtained a power reading of 13.5 watts on the LP100. Apparently, the reading from the LP100 is very very close to the power calculated from the DL1. The calibration of W1 was turning the CAL trimmer for 4.5VDC at TP1 before this test. If I want to have a reading from W1 to match the DL1 calculation or LP100, I have to readjust the CAL trimmer of W1 to arrive a reading of 4.82VDC at TP1. My questions are: 1. What is the basis of the 4.5VDC as suggested in P.10 of the W1 construction manual? 2. Is the power calculated from the DL1 more accurate than the reading of W1 based on the calibration mentioned in above? 3. Since the power calculation from the DL1 is very closed to the reading in LP100, should I turn the CAL trimmer in W1 to match with LP100? Could any of you give me some help? Christmas time is the quiet time for me to do some radio experiments. TNX 73 Johnny Siu VR2XMC _ 与联机的朋友进行交流，请使用 Live Messenger; http://get.live.com/messenger/overview ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Problem
Don, I left out key info in my first post. Problem exists even with no key. Would not have posted if the problem was a simple as a shorted key but maybe there is still a simple solution and I appreciate all responses. Will go back and check voltages and resistances after Christmas. 73 Bob Don Wilhelm [EMAIL PROTECTED] wrote: Bob, This has to be a simple matter of a closed (or shorted) dash line. Does it behave normally with the key NOT plugged in? If so, check the key plug itself with your ohmmeter. If you find a short between the shell and either the tip or the ring, check the plug, the cable and your paddles. If it is the KXPD1 paddle, remove the rubber grips and see if the problem disappears - if so, you can spring the contact leaves up a bit, and if not, you may have to remove the cover over the hole and check to be certain the wires going to the rear of the jack are not touching the metal body. It is possible, but unlikely that the problem is inside the KX1. 73, Don W3FPR -Original Message- Has worked fine since building earlier this year but after returning from a trip via airline it starts transmitting as soon as I turn it on. Sending 'dahs with a key plugged in. When I plug in a key I hear its side tone as I normally would under the continuous series of dahs being transmitted. When first turned on I see the band is 14mhz then the display only shows led bars when it is sending. I will take it out of the case later in the week and see what I can find but wanted to see if anyone else had experienced the same problem and what was the fix? -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/601 - Release Date: 12/24/2006 11:31 AM __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 #5549 some questions/remarks
In a message dated 25/12/06 10:53:49 GMT Standard Time, [EMAIL PROTECTED] writes: 1. when looking at the transmitted signal using a spectrum analyser, the signal didn't seem as clean as we liked it. We didn't have time (it was the day before X-mas!) to really start counting the dB's, but on 30, 12 and 10 m we saw some signals around the main signal. Is there any chance we can get these bands 'cleaner' by further tweaking the filters? - Hi Jurgen, Are you 100% sure that the spurii you are seeing are just not due to you overloading the input of the spectrum analyser? This is a common cause of apparent excessive spurii! Merry Christmas to all, Bob, G3VVT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KPA100 Elimination?
What with Elecraft's eventual HF AMPLIFIER(s) product, becoming available - I'm wondering if this will mean new K2 builders will not need to go the KPA100 in-chassis amplifier route? I've never felt good about building and layering a KPA100 amplifier on top of the great little K2 bare bones rig. With the new Elecraft AMPLIFIER(s) - will us with bare bones K2's - need to beef up the basic K2 output, to drive the new Elecraft amplifiers? Will I need a HF PROJECTS 35W amp in-between? Plannning for 2007 .. Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KPA100 Elimination?
You won't be able to drive the KPA800/1500 products to their full output with a bare K2. I don't understand the reluctance to add the KPA100 but at the same time suggesting a smaller, non-Elecraft amp to drive the new KPA800/1500. You can build your KPA100 in a separate case if that's the problem. Otherwise, you will be one of thousands of Elecraft customers happily driving a KPA800/1500 with a K2/100. Craig NZ0R K2/100 #4941 K1 #1966 KX1 #1499 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fred (FL) Sent: Monday, December 25, 2006 8:30 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA100 Elimination? What with Elecraft's eventual HF AMPLIFIER(s) product, becoming available - I'm wondering if this will mean new K2 builders will not need to go the KPA100 in-chassis amplifier route? I've never felt good about building and layering a KPA100 amplifier on top of the great little K2 bare bones rig. With the new Elecraft AMPLIFIER(s) - will us with bare bones K2's - need to beef up the basic K2 output, to drive the new Elecraft amplifiers? Will I need a HF PROJECTS 35W amp in-between? Plannning for 2007 .. Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 #5549 some questions/remarks
On Christmas morning Jurgen wrote ... Is there any chance we can get these bands 'cleaner' by further tweaking the filters? -- Jurgen, Even though the K2 spec sheet states 10 meter coverage, the K2 is really only designed to cover the bottom 1.2 MHz of the band. Here are several resources on this subject http://www.ac6rm.net/mailarchive/html/elecraft-list/2001-11/msg00685.html http://www.ac6rm.net/mailarchive/html/elecraft-list/2001-11/msg00742.html http://www.ac6rm.net/mailarchive/html/elecraft-list/2004-03/msg00925.html http://www.qslnet.de/member/la3za/K2/10mDL1iAQ.pdf http://www.qslnet.de/member/la3za/K2/BpfDL7MAJ.pdf http://www.qslnet.de/member/la3za/K2/mod.html 73, Gary KI4GGX ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 #5549 some questions/remarks
Jurgen, If you peak the 10 meter bandpass filter at 28.4 MHz, you will have greater power output at 28.8 MHz. Note that the specified 10 meter band coverage for the K2 is 28.0 to 28.8 MHz. Above that range, the output power is expected to decrease. There are mods to increase the 10 meter bandpass filter width if you should choose to do that. See http://www.qslnet.de/member/la3za/K2/mod.html for more information. 73, Don W3FPR -Original Message- 2. Output power on 10m is OK low in the band, but when going higher up it decreases to a mere 1,5 W. Moreover the higher we go in the band the worse the transmitted spectrum gets (see above). Is it possible to set the filters so the complete 10m band can be used at a reasonable power? I know, for CW the low part of the band is the place to be, but I'd like to also install the SSB option. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/601 - Release Date: 12/24/2006 11:31 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KX1 Problem Found problem maybe
Don and Jim thanks for your help. I may have discovered my problem. On page 18 of the KX1 manual it says DO NOT TRIM the 28-pin socket pins before or after soldering. These pins are hollow and form the lower part of the socket for the IC pins. When building, I was so used to trimming pins after soldering that I made the error of trimming the hollow pins after soldering the IC socket. When I first completed the KX1 I remember that U1 the MCU never seemed to seat fully but the radio worked fine so I never thought about it anymore. Since having the problem I asked help on, I looked closely at the poor seating and re-read the manual (p18) and realize my major mistake. In the process of trying to seat U1 today one of the pins broke off but I may be able to solder a small wire to the remaining base. Question for Don, Jim or anyone with experience in this. If I completely removed the ruined 28pin socket and am able to solder a little wire onto the broken pin of U1, would it work to carefully solder U1 directly to the circuit board without using the low profile 28 pin socket? I suspect that all my problems stem from this error I made early on and was just lucky that it has worked for almost 6 mos. Thanks for all your help again, Bob WA4MQW Bob C. [EMAIL PROTECTED] wrote: Should have added that the problem continues even with no key installed.. I have since reseated the MCU but it still continues to transmit dahs when I turn on the power with no key installed. Read in the archives that another ham had the same problem with his back in June and have sent him an email. Any suggestions are appreciated. 72, Bob WA4MQW Bob C. wrote: Has worked fine since building earlier this year but after returning from a trip via airline it starts transmitting as soon as I turn it on. Sending 'dahs with a key plugged in. When I plug in a key I hear its side tone as I normally would under the continuous series of dahs being transmitted. When first turned on I see the band is 14mhz then the display only shows led bars when it is sending. I will take it out of the case later in the week and see what I can find but wanted to see if anyone else had experienced the same problem and what was the fix? 73, Bob WA4MQW __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 Elimination?
I thought new FCC rules are going to relax limitations on amplifier gain. I vaguely recall the Elecraft guys saying they might change the drive level requirements of the KPA-800 to allow full output power when drivin by 15W after the new rules went into effect. - Original Message - From: Craig Rairdin [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Monday, December 25, 2006 9:38 AM Subject: RE: [Elecraft] KPA100 Elimination? You won't be able to drive the KPA800/1500 products to their full output with a bare K2. I don't understand the reluctance to add the KPA100 but at the same time suggesting a smaller, non-Elecraft amp to drive the new KPA800/1500. You can build your KPA100 in a separate case if that's the problem. Otherwise, you will be one of thousands of Elecraft customers happily driving a KPA800/1500 with a K2/100. Craig NZ0R K2/100 #4941 K1 #1966 KX1 #1499 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fred (FL) Sent: Monday, December 25, 2006 8:30 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA100 Elimination? What with Elecraft's eventual HF AMPLIFIER(s) product, becoming available - I'm wondering if this will mean new K2 builders will not need to go the KPA100 in-chassis amplifier route? I've never felt good about building and layering a KPA100 amplifier on top of the great little K2 bare bones rig. With the new Elecraft AMPLIFIER(s) - will us with bare bones K2's - need to beef up the basic K2 output, to drive the new Elecraft amplifiers? Will I need a HF PROJECTS 35W amp in-between? Plannning for 2007 .. Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Problem Found problem maybe
Bob, The correct way to fix it is to obtain a new firmware chip and socket from Elecraft. You certainly can remove the socket and solder the firmware directly into the PC board, and yes you can use a wire to repair the broken pin. That is the least expense and for this instance, it would be expedient. HOWEVER, if you ever want to change the firmware, you will have to remove the old firmware IC at that time (and perhaps install a socket). The choice is yours to make - electrically it will make no difference, socket or no socket. 73, Don W3FPR -Original Message- Question for Don, Jim or anyone with experience in this. If I completely removed the ruined 28pin socket and am able to solder a little wire onto the broken pin of U1, would it work to carefully solder U1 directly to the circuit board without using the low profile 28 pin socket? I suspect that all my problems stem from this error I made early on and was just lucky that it has worked for almost 6 mos. Thanks for all your help again, Bob -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.27/602 - Release Date: 12/25/2006 10:19 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Problem Found problem maybe
At 12/25/2006 11:27 AM, Don Wilhelm wrote: Bob, The correct way to fix it is to obtain a new firmware chip and socket from Elecraft. You certainly can remove the socket and solder the firmware directly into the PC board, and yes you can use a wire to repair the broken pin. That is the least expense and for this instance, it would be expedient. HOWEVER, if you ever want to change the firmware, you will have to remove the old firmware IC at that time (and perhaps install a socket). The choice is yours to make - electrically it will make no difference, socket or no socket. You may want to use two low profile sockets if you have a couple in your junk box. Put the firmware chip in one and solder the broken lead to the socket. Then solder the second socket to the PCB and install the first. This allows you to replace the firmware chip if necessary. 73, Don W3FPR -Original Message- Question for Don, Jim or anyone with experience in this. If I completely removed the ruined 28pin socket and am able to solder a little wire onto the broken pin of U1, would it work to carefully solder U1 directly to the circuit board without using the low profile 28 pin socket? I suspect that all my problems stem from this error I made early on and was just lucky that it has worked for almost 6 mos. Thanks for all your help again, Bob -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.27/602 - Release Date: 12/25/2006 10:19 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 #5549 some questions/remarks
Hi, Jurgen: Regarding 10 meters, the specifications say the K2 will deliver at least 10 watts from 28.0 to 28.8 MHz - a range of 800 kHz. It is not designed to cover the whole 10 meter band. I'm not sure where you see the power drop off, but if it's making 10 watts at 28.8 MHz it's working within spec. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jurgen ON5MF Sent: Sunday, December 24, 2006 11:43 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K2 #5549 some questions/remarks Hi, First of all Merry Christmas to all of you! Yesterday I went over to a friend and we did some quick tests on my new K2 (basic, no options yet). To be clear, everything has been aligned with basic tools, as in the user manual. Here are some things we noticed: 1. when looking at the transmitted signal using a spectrum analyser, the signal didn't seem as clean as we liked it. We didn't have time (it was the day before X-mas!) to really start counting the dB's, but on 30, 12 and 10 m we saw some signals around the main signal. Is there any chance we can get these bands 'cleaner' by further tweaking the filters? 2. Output power on 10m is OK low in the band, but when going higher up it decreases to a mere 1,5 W. Moreover the higher we go in the band the worse the transmitted spectrum gets (see above). Is it possible to set the filters so the complete 10m band can be used at a reasonable power? I know, for CW the low part of the band is the place to be, but I'd like to also install the SSB option. 3. When listening to a continuous signal (XG2 for example) there is some kind of a (digital) 'thump' in the audio everytime I turn RIT or VFO. Is this a normal behaviour or not? -- 73 Jurgen Geldhof ON5MF [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] my site:www.on5mf.be http://www.ktk.be our club: www.ktk.be http://www.ktk.be the Belgian Amateur Radio Society: www.uba.be http://www.uba.be ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KX1 Problem Found problem maybe
Jim, Glad to know that I was not the only one to make this mistake. We have been trained well to cut pins after soldering. Thanks for you offer of the chip. Mine is the very latest since I also have the uninstalled 30/80 kit I ordered at the same time this summer. The number label on the chip is KX1 1.02. I appreciate your kind offer but I'll just order a new chip and socket from Elecraft and not rush this job. Glen, I appreciate your advice about breaking up the old socket to help save the circuit board in the de-soldering process. Don't have a vaccum pump just the cheap hand (RS) spring loaded type so hope it works. This is why I love the Elecraft Group always a great bunch of people ready to help when needed and when not I enjoy and learn from all the posts well most of them. 73 to all Bob WA4MQW k4zm [EMAIL PROTECTED] wrote: Bob: I did the same thing on the first KX1 I built. I ordered a new socket from Elecraft and replaced it. If you decide to remove the socket, be sure and cut up the socket on the top of the board so that you can remove the pins one at a time. That way you will not damage the circuit board. What is the version on the firmware? I have several chips that I have removed from KX1s when I upgraded them with the 30 Meter board and the 80/30 meter mod. I may have one I can send you for free. The one I have is KX1 Ver 1.01 and I also found a new socket in my parts box. You are welcome to both. 73 Jim Younce K4ZM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 Elimination?
Unfortunately (IMHO) the 15 dB maximum gain limitation was retained in the new rules (do we need a KPA400?) Bob, N7XY On Dec 25, 2006, at 7:49 AM, Tom Althoff wrote: I thought new FCC rules are going to relax limitations on amplifier gain. I vaguely recall the Elecraft guys saying they might change the drive level requirements of the KPA-800 to allow full output power when drivin by 15W after the new rules went into effect. - Original Message - From: Craig Rairdin [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Monday, December 25, 2006 9:38 AM Subject: RE: [Elecraft] KPA100 Elimination? You won't be able to drive the KPA800/1500 products to their full output with a bare K2. I don't understand the reluctance to add the KPA100 but at the same time suggesting a smaller, non-Elecraft amp to drive the new KPA800/1500. You can build your KPA100 in a separate case if that's the problem. Otherwise, you will be one of thousands of Elecraft customers happily driving a KPA800/1500 with a K2/100. Craig NZ0R K2/100 #4941 K1 #1966 KX1 #1499 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fred (FL) Sent: Monday, December 25, 2006 8:30 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA100 Elimination? What with Elecraft's eventual HF AMPLIFIER(s) product, becoming available - I'm wondering if this will mean new K2 builders will not need to go the KPA100 in-chassis amplifier route? I've never felt good about building and layering a KPA100 amplifier on top of the great little K2 bare bones rig. With the new Elecraft AMPLIFIER(s) - will us with bare bones K2's - need to beef up the basic K2 output, to drive the new Elecraft amplifiers? Will I need a HF PROJECTS 35W amp in-between? Plannning for 2007 .. Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KPA100 Elimination?
Yup... That's the reason I stopped building them. 73, Ken Wagner K3IU -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brent Sutphin Sent: Monday, December 25, 2006 3:25 PM To: Craig Rairdin; elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA100 Elimination? You seem to be correct on your price assessment. It is a shame that such a great radio goes so cheap. I have built several and I enjoy building but just am not willing to lose 20- 30% per kit. There was a time when it was easy to get the kit price for a newly built kit. Just my two cents. Brent ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 Elimination?
Yes, yes, yes From what I understand, the KPA800 has two 400 watt power modules combined to produce 800 watts. So, a KPA400 with just one of the power modules, a built-in lower power antenna tuner, no combiner, a smaller power supply, solid state T/R switching, and without some fancy bells and whistles like SO2R would be ideal. Integrate it with the K2's power control, band switching, and antenna switching like the KPA100/KAT100 combo. A separate cabinet styled to match either the K2 or new KPA800/1500 would be just fine. Price it between the KPA100/KAT100 combo and the KPA800, say between $1500 and $2000 or so. Darrell VA7TO On December 25, 2006 10:31 am, Tom Althoff wrote: Hmmm...a KPA-400 replacement for the KPA-100 would be a VERY nice addition to the K2! Imagine a K2 that can go from milliwatts within 6db of the legal limit at the turn of a knob! I could get rid of my Titan II and be perfectly content. - Tom K2TA - Original Message - From: Bob Nielsen [EMAIL PROTECTED] Unfortunately (IMHO) the 15 dB maximum gain limitation was retained in the new rules (do we need a KPA400?) -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 Elimination?
Oh, and I forgot one thing. No FAN! Just a nice HUGE heatsink. No matter how quiet the fan, I just hate fan noise. The things holding me back from buying a KPA100/KAT100 are only 100 watts and the fan. Another 6 db and no moving air noise would tip the scale for me. On December 25, 2006 01:14 pm, Darrell Bellerive wrote: Yes, yes, yes From what I understand, the KPA800 has two 400 watt power modules combined to produce 800 watts. So, a KPA400 with just one of the power modules, a built-in lower power antenna tuner, no combiner, a smaller power supply, solid state T/R switching, and without some fancy bells and whistles like SO2R would be ideal. Integrate it with the K2's power control, band switching, and antenna switching like the KPA100/KAT100 combo. A separate cabinet styled to match either the K2 or new KPA800/1500 would be just fine. Price it between the KPA100/KAT100 combo and the KPA800, say between $1500 and $2000 or so. Darrell VA7TO On December 25, 2006 10:31 am, Tom Althoff wrote: Hmmm...a KPA-400 replacement for the KPA-100 would be a VERY nice addition to the K2! Imagine a K2 that can go from milliwatts within 6db of the legal limit at the turn of a knob! I could get rid of my Titan II and be perfectly content. - Tom K2TA - Original Message - From: Bob Nielsen [EMAIL PROTECTED] Unfortunately (IMHO) the 15 dB maximum gain limitation was retained in the new rules (do we need a KPA400?) -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Assembled radio prices (was: KPA100 Elimination?)
Brent Sutphin wrote: You seem to be correct on your price assessment. It is a shame that such a great radio goes so cheap. I have built several and I enjoy building but just am not willing to lose 20- 30% per kit. There was a time when it was easy to get the kit price for a newly built kit. Well, it makes sense. I wouldn't buy an assembled kit as complicated as a K2 unless I knew the builder and was assured of his competence. Do you really want to look for someone else's poorly tinned toroid leads? -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Assembled radio prices (was: KPA100 Elimination?)
I agree that's part of the dynamic at work here. But I also think it's no different than any other used piece of equipment. I am willing to pay 50% to 70% of the retail price for a current model of some piece of electronic or computer equipment. I might go as high as 80% if it's a hard-to-find item. Above that, the benefits of buying new outweigh the savings -- that is, I get a warranty of some kind and I get to know I'm the first owner so I know how the equipment has been used. That maps pretty well to what I see with the Elecraft kits. People count the kit price as the retail price, and discount from there. I think the fact that someone has been successfully using the K2 for a year or two is proof that it's built well enough, and I think some people figure the builder is more experienced than they are, otherwise they wouldn't have built a kit. So the same market forces apply and people tend to pay no more than about 80% of SRP for a current piece of electronic gear. I believe, but can't prove for sure, that radios sold here on the list command a higher price than when sold on eBay. It's hard to say since I don't have the same visibility into the final selling price when the item is sold privately here on the list. Craig NZ0R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vic K2VCO Sent: Monday, December 25, 2006 3:47 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Assembled radio prices (was: KPA100 Elimination?) Brent Sutphin wrote: You seem to be correct on your price assessment. It is a shame that such a great radio goes so cheap. I have built several and I enjoy building but just am not willing to lose 20- 30% per kit. There was a time when it was easy to get the kit price for a newly built kit. Well, it makes sense. I wouldn't buy an assembled kit as complicated as a K2 unless I knew the builder and was assured of his competence. Do you really want to look for someone else's poorly tinned toroid leads? -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft CW Net -- notes wishes
Hi folks, I would like a vote. This is a semi-democratic sort of thing :) I take votes and then try to find a line to fit through them. It appears the bands both go away as I start the twenty and forty meter nets. What I would like to do is move both of them earlier by an hour. So twenty would meet at 2300Z and forty at 0200z. This will ease some of the frustration of either not being recognized (or even heard in most cases) or me not hearing from you all. Send your ideas to me directly so we do not use too much of Eric Wayne's bandwidth. I'll post the results later. Until then I hope you all are having a very Merry Christmas. My nephew and I banged on the roof a bit so it would lie flatter and covered it all with plastic. Then we started splitting the rounds of the hemlock tree which caused the damage. Both jobs went well and quickly so we spent another hour gathering enough wood to fill his truck. It was a nice way to spend Christmas day. Now to find something to make for dinner. Stay warm and dry. Next week we can work the bands on New Year's Eve. Maybe the straight key folks will join us or we can join them. Doesn't matter to me as long as the bands are filled with the sounds of happy people making contacts via CW. A great way to end 2006. 73, Kevin. KD5ONS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Adding 80 and 17 Meters KFL1-2 to K1
I'm adding an additional two band board to my K1. I have the original 40/20 board, added sometime back the four band board 40/30/20/15 and am now adding the 80/17 meters board. All going well until on the 80 meter band kit it mentions about adding the 10-uF electrolytic capacitor at C78 on the bottom side of the RF board. I can not located C78 anywhere on the board. In checking the parts list for the RF board I find the capacitor count only goes up the C75. I have the K1 RF Rev. D board. Am I missing something? I also see that the trace near TR3 needs to be cut and a choke added. No problem with this. 72, Greg KI8Af ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 frequencyh stability
For a point of reference for N1KO's observed 800 cycle drift as his K2 warms up with use, I looked up the specs for one of my non-TCXOd radios (IC-765) overall the radio can drift +/- 350 cycles from 0 to 50C after 1 minute from switch on, +/- 200 cycles in the first hour. Bung in a 0.5 ppm TCXO the 0-50C drift goes down to +/- 100 cycles. Again, my 765 does not have one. Unlike some other rigs also in use here, the 765 does not use this reference to derive everything it needs inside (the BFOs are simple crystal oscillators). Both the 765 my K2 with the all the drift mods were tweaked on an HP5350B then left to soak. The 5350B is a relatively modern 20 Gc counter after 30 minutes from applying mains is in +/- 1 ppm range by itself, even better with fitted option reference or external references handy at the time (ultimately a R+S rubidium house reference, model which escapes me now) - essentially down to it's own +/- one least significant digit accuracy spec. Drift observed was therefore essentially just that of the radios. I have yet to get the K2 to indicate the frequency it is actually on (say 200 cycles) stay that way based on gut feeling from side-by-side operation of the two rigs over a number of years of contesting. And the 765's walkabout is glaringly obvious when compared to a TS-950S without TXCO (but uses that common reference for everything, I believe - can't find manual at the moment). With the K2, there is roughly +/- 500 cycle window that must be considered when near band edges or trying to find some DX station somebody else has spotted. Depending on what one's operations are like, the accuracy of the K2's frequency readout amount of drift observed may or may not be of concern. It is unrealistic to expect performance in these areas like some radios, as it was clearly not intended originally with mods, is still probably a bit shy of what might have been possible if was a design goal - though it certainly beats any backpack type radio I have had or used. 73, VR2BrettGraham ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 Elimination?
I'll probably get thrown off of the Elecraft list for what I am about to say...8-) Don't get me wrong...I love QRPmost of my contest participation is at 5W. I can work the world with 5W. And on 10M during a solar peak I can break pileups with 5W. But my experience is that 100W with a dipole on 160M *IS* QRP...that the chances of grabbing a VU7 in a 40M pileup from the U.S. running 5W are pretty low and anyone looking to run emergency traffic with 5W only has to try checking into the Elecraft CW net to have a sense of what to expect when your antennas are down and the water is flowing past your bedroom window. Turn it up to 400W and maybe get heard...and fry some fish as they float by! QRP...the real skills are at the other end. boy...am I asking for trouble with THAT line! LOL. 73 de K2TA/qrp ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KPA100 Elimination?
Tom, I don't think you will be thrown off the list - this is not a QRP reflector, and with questions about the (hopefully forthcoming soon) KPA800 and KPA1500, it is definitely not all QRP oriented - there are folks of both the QRP and QRO persuasions using Elecraft gear. Your thoughts are consistent with a talk given by Mike Boatright KO4WX at FDIM last year. Here he was talking to a bunch of QRP enthusiasts about Emergency Communications - he made a valid point that you must use enough power to create a signal above the noise level at the receiving end - whether that be 1 watt, 5 watts, 100 watts or 1500 watts. If your signal is down 'in the mud' at the receiving end, and you must make communication, there is no choice but to increase power - of course a directional antenna could increase power at the receiver end if it is pointed in that direction, but a beam on 80 meters or 160 meters is not a common thing. Even though we have a 5 watt limit to the QRP category for contests and such, the minimum power necessary for reliable communications may exceed that limit by a large margin. 73, Don W3FPR -Original Message- I'll probably get thrown off of the Elecraft list for what I am about to say...8-) Don't get me wrong...I love QRPmost of my contest participation is at 5W. I can work the world with 5W. And on 10M during a solar peak I can break pileups with 5W. But my experience is that 100W with a dipole on 160M *IS* QRP...that the chances of grabbing a VU7 in a 40M pileup from the U.S. running 5W are pretty low and anyone looking to run emergency traffic with 5W only has to try checking into the Elecraft CW net to have a sense of what to expect when your antennas are down and the water is flowing past your bedroom window. Turn it up to 400W and maybe get heard...and fry some fish as they float by! QRP...the real skills are at the other end. boy...am I asking for trouble with THAT line! LOL. 73 de K2TA/qrp ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.27/602 - Release Date: 12/25/2006 10:19 AM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.27/602 - Release Date: 12/25/2006 10:19 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 frequencyh stability
I believe the N1KO data was that he observed a drift of 80 Hz, not 800 Hz. A drift that large would indicate something seriously wrong in one of the oscillators. The current K2 design is not as good as a TCXO, but it is a lot better than an unstabilized crystal oscillator. It should be possible to reduce the drift to significantly less than 100 Hz over a temperature range of 10-50C with adjustment of resistor RA in the temperature compensation circuit. -John KI6WX - Original Message - From: VR2BrettGraham [EMAIL PROTECTED] For a point of reference for N1KO's observed 800 cycle drift as his K2 warms up with use, I looked up the specs for one of my non-TCXOd radios (IC-765) overall the radio can drift +/- 350 cycles from 0 to 50C after 1 minute from switch on, +/- 200 cycles in the first hour. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 #5549 some questions/remarks
A few months ago, after completing #5390, I ran a check on the cleanliness of the K2 transmitted CW signal on 28Mhz, using the spectrum scope in my IC-781 as a spectrum analyser. I could not detect any trace of spurii and the slopes of the received trace were sharp and smooth, with the scope set to 5Khz per division. Signal also sounded clean and pure to listen to. I had to set up a high degree of 'attenuation' between the K2/dummy load and the IC-781 (with a wire antenna about 1 ft long), which I did by having the K2 running dits into the dummy load in one room of our apartment, and the IC-781 in another room some distance away. If you try this, take care to arrange enough proper attenuation, to avoid the risk of blowing the RF stage or switching diodes in your RX! 73 and Happy Holidays to all, Wyn, VR2AX In a message dated 25/12/06 10:53:49 GMT Standard Time, [EMAIL PROTECTED] writes: 1. when looking at the transmitted signal using a spectrum analyser, the signal didn't seem as clean as we liked it. We didn't have time (it was the day before X-mas!) to really start counting the dB's, but on 30, 12 and 10 m we saw some signals around the main signal. Is there any chance we can get these bands 'cleaner' by further tweaking the filters? - Hi Jurgen, Are you 100% sure that the spurii you are seeing are just not due to you overloading the input of the spectrum analyser? This is a common cause of apparent excessive spurii! Merry Christmas to all, Bob, G3VVT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KPA100 Elimination?
My original inquiry concerned my options, with a new K2 build - for adding some more power later down the pike. I've always liked separate items; xcvr, tuner, metering, and amplifiers. In some way - the way I upgrade frequently - its easier with all the pieces, for me to swap/sell out a single item easier. And I'm just not nuts about adding a KPA100 on top cover of my neat little QRP K2 rig. I'd guess I want to give the K2 all the chance I can, with having as little RF interaction with a large pcb amplifier sitting 2 above the K2 plane. Having had done hundreds, no thousands, of CAD runs on analog circuits in my previous life - there are such things as R/L/C/S/F interactions and optimums. Perhaps the K2's digital makeup - helps this. I really don't understand all that is involved in moving a KPA100 outside to a separate box. Looks like my options are to build that new K2, and wait out the vendors - impacted by the latest FCC rulings. I understand there is a DB increase limit, over what the base K2 outputs. Perhaps that will limit my external choices. Does anyone know the DB increase, from 10W PEP to 100W PEP? What is driving me is the chance, in the future, to be able to swap out any item in the xcvr/tuner/amp/antenna string. Affordably, or with alternative backup items. Thanks, Fred N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 in 19inch Rack?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Has anyone attempted mounting a K2 into a 19 inch rack case either with or without the case? Its something i am contemplating doing. This might be a kit suggestion idea for Elecraft. A new front panel design that will mount in a 19 inch rack case. It certainly could enhance the ergonomics of the K2 and breath some more life into the K2 as a fixed station radio. Craig VK3HE -BEGIN PGP SIGNATURE- Note: This signature can be verified at https://www.hushtools.com/verify Version: Hush 2.5 wpsEAQECAAYFAkWQuY4ACgkQFO3Fz3YpTj337gP4u5wkHEya7/WzqqdST3rhkhYULnc+ nuy7U7O4Q+TfM6a1GvsMpf28w0uqEHqanH34o+ONvSJjZjZbOZUinU8hWn60uM85brNF ZUhi03aSpO9K6nBA3D/bw7Tb3mJ2JwZG1JqQ2zUc69vwYFUXa3QDy0iChynUd7hRehqv jTLfGg== =gU3u -END PGP SIGNATURE- Concerned about your privacy? Instantly send FREE secure email, no account required http://www.hushmail.com/send?l=480 Get the best prices on SSL certificates from Hushmail https://www.hushssl.com?l=485 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 in 19inch Rack?
Has anyone attempted mounting a K2 into a 19 inch rack case either with or without the case? Its something i am contemplating doing. This might be a kit suggestion idea for Elecraft. A new front panel design that will mount in a 19 inch rack case. It certainly could enhance the ergonomics of the K2 and breath some more life into the K2 as a fixed station radio. Craig VK3HE === At just under 8 inches wide, you could get two K2's side by side. With all the controls mounted to the K2's front panel board, it would be hard to expand the size in order to use larger knobs with more clearance between them. Maybe new controls mounted on the new panel and wired to the K2 front panel. Would need to cut the square holes for the push buttons. Not for the faint of heart. And a hole for the real S meter that a larger K2 would sport. And a front panel mounted speaker. Maybe an analog clook removed from an old Hammarlund HQ-180 receiver. While we are at it, lets use those Hammarlund knobs, too. You wouldn't need to put one hand on the rig to keep it from sliding across the table top, while checking the filter settings. My friction coefficient is such that I can tap one button but not two at the same time without relocating the rig. Last week I entered the shack to find the K2 shoved tight aginst the wall. A small tree had fallen across a guy for one of my antennas and gave the coax a good yank. This was due to the same storm that took Elecrafts Net Control Operator first class off the air a week ago. A large enough rack panel might stand up to a tree of that size. My tree, not Kevins. Rick Dettinger K7MW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] RE K2 stability
K2 # 4498, 2 years old ! Just checked this caracteristic : starting from cold (ambiant temp 18 C), tuned on RM (9996.000) time station, the receiving frequency was 9995.942, rising to 9995.985 in about 2 minutes, then to 9996.008 to 011 in the last 20 minutes and variing slowly arround this value with time (andprobably, ambiant temp vagaries !). Conclusion, the K2 is very much within the caracteristic, and I think that for so simple a concept, the result is more than honnorable, thank to the Elecraft team. A very Happy New Year 2007 to all! F5UL/Bob ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
