[Elecraft] OT: FS Fluke 8842A DMM with Original Manual
The Fluke is a professional grade 5.5 digit DMM with regular and four wire measurement capabilities. It saw me through a K2/100 build, a KX1 build, and many other projects. It is is very nice shape and fully operational. Its last full calibration was in November of 2005 lapsing in 2006. I haven't seen the need for a formal recalibration, as it comares accurately to my other dmms and standards. It comes complete with power cord, a good set of test leads, and the original manual (user and service). You can scan the internet to get the complete specifications on the 8842A, which is the top of the 8000 line. However, there are a few reasons why I like it. 1) it is a very solidly built, reliable unit; 2) it has a low noise front end and uses thin film resistor networks (first in this series to do so); 3) the controls are straight forward and logical; 4) measurements are held; and 5) it has a bright electrofluorescent display. It uses Fluke's true rms technology. The last two points really add to usability. You can't always be looking at the DMM when you are looking into the work and placing the leads. Here, it will hold the reading after you remove the leads. You can zero it by touching the leads together or just take another reading. The electrofluorescent display is much, much easier to read than LCD displays (you can read an ef display across the room in full light) and easier on the eyes than the a red led display. As of this morning (April 19) the least expensive 8842A on eBay is being sold for $299, buy it now. It does not come with a manual, but Tucker is selling the manual separately for $50. There are others, admittedly with the GPIB* option, that are being offered for as high as $499. I am asking $185 plus actual shipping for the dmm, probes, cord and manual. Howard W. Ashcraft, Jr. W1WF K3/100 *The GPIB option is not very useful outside of automated testing and mass production. __ 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
[Elecraft] Re; ot: Fluke 8842a dmm
Sold Howard Ashcraft Hanson Bridgett LLP 415 995-5073 hashcr...@hansonbridgett.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
[Elecraft] OT: FS: Fluke 88422A 5.5 Digit DMM with Original Manual
The Fluke is a professional grade 5.5 digit DMM with regular and four wire measurement capabilities. It saw me through a K2/100 build, a KX1 build, and many other projects. It is is very nice shape and fully operational. Its last full calibration was in November of 2005 lapsing in 2006. I haven't seen the need for a formal recalibration, as it comares accurately to my other dmms and standards. It comes complete with power cord, a good set of test leads, and the original manual (user and service). You can scan the internet to get the complete specifications on the 8842A, which is the top of the 8000 line. However, there are a few reasons why I like it. 1) it is a very solidly built, reliable unit; 2) it has a low noise front end and uses thin film resistor networks (first in this series to do so); 3) the controls are straight forward and logical; 4) measurements are held; and 5) it has a bright electrofluorescent display. It uses Fluke's true rms technology. The last two points really add to usability. You can't always be looking at the DMM when you are looking into the work and placing the leads. Here, it will hold the reading after you remove the leads. You can zero it by touching the leads together or just take another reading. The electrofluorescent display is much, much easier to read than LCD displays (you can read an ef display across the room in full light) and easier on the eyes than the a red led display. As of this morning (April 19) the least expensive 8842A on eBay is being sold for $299, "buy it now". It does not come with a manual, but Tucker (a well known test equipment vendor) is selling the manual on eBay separately for $50. There are other 8842As on eBay, admittedly with the GPIB* option, that are being offered for as high as $499. I am asking $195 plus actual shipping for the dmm, probes, cord and manual. Howard W. Ashcraft, Jr. W1WF K3/100 *The GPIB option is not very useful unless you are doing automated testing and mass production. __ 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
[Elecraft] FS: KX1, KXB30, KXAT1; KXPD1 w/Pelican Case
I have a mint KX1 with the above options. It has less than 20 hours of use (probably less than 10) and has been stored inside a Pelican case. There is also a small wall-wart that I use with the KX1 that fits into the case. Total cost exceeds $500 for the kits and Pelican case. I am willing to sell for $425 by certified check or Paypal. Can be picked up in Alameda, CA or downtown San Francisco, or shipped by FedEx at their cost. Howard W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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 Excessive Internal Noise?
After solving an Auxbus issue with the KPA100, I noticed the following. With no antenna, or a good dummy load, if the RF level is full counter clockwise and the AF full clockwise you get a perfectly acceptable level of audio hiss. However, as you advance the RF level to 12 O'clock a "bacon frying" noise starts to be perceptible. At full RF, full AF, it is quite distinct. I don't seem to recall the "bacon frying" noise before and it is low enough that band noise will blank it. Also, I rarely have the AF past 12 O'clock in operation, so it isn't apparent, but I also think that it shouldn't be there. Years ago I used to work on audio equipment and this sounds like a noisy resistor, but because it is coming out of the RF circuitry, it could be a few other things, too. First question. Would someone do a similar check on their K2 to see if this is inherent (i.e., am I chasing rainbows). Thanks in advance. Second, I'm starting to go through the schematics looking for suspects and will do a little testing when I get back home (on a business trip right now). If anyone has already experienced and addressed this, I would appreciate your information to jump start my tracing. Thanks, Howard W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] Mono v. Stereo Headphones?
I was cleaning out my parents home the other day and ran across my father's Telex HTW-2A twinset headphones. He was a Pan American Captain flying 727s and 707s at the end of his career. The twinset was the favorite headset because it had good audio and was comfortable for long hauls. But it is a mono headset. I have been using it for CW qsos and it is quite comfortable and seems to work well. However, is there an advantage to using stereo phones for cw work (or for ssb, which I do rarely), assuming you are piping the audio from a single receiver? Howard, W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] INFO 080
I know there is information in the archives, but a search on INFO 080 revealed only 3 entries. My problem is that after a few weeks sitting unused, by K2/100 is showing an INFO 080 error. In addition to the error message, the unit malfunctions by not remembering settings through on and off cycles and by transmitting uncontrolled rapid pulses when either the left or right side of an iambic paddle is keyed. It seems that malfunctions diminish, or disappear, when the power setting is below 5 watts (or at least at 4.5 watts). I suspect the KPA100 and in particular the connection between the K2 and the KPA100 because I had this problem once before and it went away after taking the cover off and replacing it. However, because it has reappeared, I'm seeking all opinions on this subject. Thanks, Howard, W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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: OT: FS Tektronix 2246 100 Mhz, 4 Channel Oscilloscopes
Thanks for the responses, the oscilloscopes are all gone, unfortunately. There were far more requests than oscilloscopes. 73 Howard Ashcraft, W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] OT: FS Tektronix 2246 100 Mhz, 4 Channel Oscilloscopes
There are occasional posts on the reflector asking about oscilloscopes and their availability. I just finished refurbishing 6 Tektronix 2246 Mod A oscilloscopes. The 2246 Mod A is a great combination of power and convenience at a reasonable price. The cursors and auto trigger and auto measurement functions are very nice. There are internal self-calibration routines for time and voltage measurement, plus these scopes also have an exceptionally bright and sharp trace. They are my favorite 100 Mhz scope. 3 of the refurbished scopes have been already been taken by members of our local club, but I may have three left so I'm posting it here before going to eBay in case someone would like them. These scopes have been cleaned, minor repairs made, and then checked and/or adjusted to meet or exceed Tek standards using Tek calibration tools (PG506/TG501/SG503). While the scopes were apart, I also repainted the cases with lacquer that was formulated to exactly match the standard Tek blue. I have loaded photographs at www.ashcraftfamily.net. Click on HWA Stuff and then you will see three sub-directories identified by model and serial number. There is a text file in each directory that explains the significance of the photographs and the prices. Prices vary because one is nearly perfect cosmetically, one is very good, but has one rear plastic standoff broken, and the third has two plastic standoff's broken. (Check the photos) Regards, Howard Ashcraft, W1WF K2/100; KX-1; K3/100 real soon now... * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] Mobile K2/100? with detached control head??
I am considering modifying my K2/100 for mobile operation. Ideally, I would detach the front panel and control board and mount them in the dash or near the driver with the remaining transceiver pieces in the rear of my SUV in a modified EC2. The SUV radio/CD player has an auxiliary input, so I will probably pipe the audio into the built-in to provide sufficient audio for mobile ops. ( I may need/want to build a small pre-amp/audio out to match the impedance/level of the audio input in the SUV. Does anyone know what the standard level/impedance is for an "AUX" connection? Before sitting down and figuring how to accomplish this task, I thought I would ask if anyone has undertaken a similar project and if there were any unusual difficulties. (The good/bad news is that I won't actually undertake this project until a K3 arrives, so I have time to consider how this should be accomplished) 73, Howard W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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 Filters Will Not Align Properly
Dan, I should have been more careful when I said "centering around 600hz." 600hz is set at about the first major peak of OP1 and is very close to the spacing you describe. Thanks and 73, Howard W1WF K2/100 KX1 * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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 Filters Will Not Align Properly
Thanks to everyone for their suggestions. However, it turned out to be a different problem. For reasons unknown, although possibly linked to the Info 80 messages, the KDSP2 was not disengaging as it should and the first DSP filter was wildly off the mark. This interfered with setting the crystal filters. Because I don't have access to the code (and if it isn't in C or C++, I would have difficulty following it), I'm not sure if a communication error could cause the DSP filter to errantly set itself. Before this all started, the DSP filters were at their default settings. In any event, once the KDSP2 was properly bypassing, everything fell in line. I'm beginning to think that the K2 saw me reading K3 specs and threw a snitfit... ;) Thanks, and 73, Howard W1WF -Original Message- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Sun 6/17/2007 5:35 PM To: Howard W. Ashcraft Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED] Subject: Re: [Elecraft] K2 Filters Will Not Align Properly Howard, Dan Barker's response was likely 'on target'. It is entirely possible that you have gotten the BFOs set to the wrong sideband. The CW filters should be at a lower BFO frequency than the CWr frequencies, and likewise the LSB filters should be lower than the USB filters. I suggest that you start over from 'scratch' - download the newest KSB2 manual from the Elecraft website and look at page 20 for the chart of initial BFO frequencies. Assume that your OP1 crystals are from the 3.6 set (unless you know the set designation) and enter 4913.5 in the LSB entry and 4916.3 in the USB entry and set the BFOs to the frequency indicated in that manual. Those frequencies should provide a good starting point for your filter alignment. When using Spectrogram, use a wideband noise generator or 'dead band' noise (turn the preamp on) - attempting to use a single signal to do the alignment will likely result in confusion and failure. Take care not to move the passband down through zero frequency on the Spectrogram display when moving the passband to your chosen sidetone pitch (that will move it to the wrong sideband). 73, Don W3FPR Howard W. Ashcraft wrote: > After several years of faithful service, my K2/100 (with KDSP2 and KSB2) has > developed a perplexing malady. The crystal filter passband will not adjust > to center on a 600hz sidetone. As you adjust the filters towards 600 hz > using Spectrogram (say OP1), the filter shape degrades and then severely > attenuates the signal until NO audio signal is visible on the Spectrogram > display. I have repeated the key realignment procedures three times, with > identical results. > > The long story. The K2/100 generated an Info 080 message that I started > diagnosing. The problem "self-corrected" which lead me to believe it was > probably a loose connection to the KPA100. Despite lots of opening and > closing the case, the problem has not reappeared. > > I now have better test equipment than I had when I built the K2 (serial 4357) > and it seemed like a good time to realign the transceiver. I did a complete > realignment, with minimal changes except a slight kick to the 4Mhz oscillator > and a reasonable amount of repeaking of the bandpass filters. So far so > good. All of the key tests/parameters were within range. > > When I started to set the filters, however, I could not get them within > range. As noted above, I can not shift the passband to cover a 600hz > sidetone. The filters appear to center around 900-1000 hz. I have attempted > to set the filters back to my prior CAL FIL BFO settings, but to no avail. > > The following are the test results from this realignment. * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to th
[Elecraft] K2 Filters Will Not Align Properly
After several years of faithful service, my K2/100 (with KDSP2 and KSB2) has developed a perplexing malady. The crystal filter passband will not adjust to center on a 600hz sidetone. As you adjust the filters towards 600 hz using Spectrogram (say OP1), the filter shape degrades and then severely attenuates the signal until NO audio signal is visible on the Spectrogram display. I have repeated the key realignment procedures three times, with identical results. The long story. The K2/100 generated an Info 080 message that I started diagnosing. The problem "self-corrected" which lead me to believe it was probably a loose connection to the KPA100. Despite lots of opening and closing the case, the problem has not reappeared. I now have better test equipment than I had when I built the K2 (serial 4357) and it seemed like a good time to realign the transceiver. I did a complete realignment, with minimal changes except a slight kick to the 4Mhz oscillator and a reasonable amount of repeaking of the bandpass filters. So far so good. All of the key tests/parameters were within range. When I started to set the filters, however, I could not get them within range. As noted above, I can not shift the passband to cover a 600hz sidetone. The filters appear to center around 900-1000 hz. I have attempted to set the filters back to my prior CAL FIL BFO settings, but to no avail. The following are the test results from this realignment. PLL Reference Oscillator Range Test High = 12101.55 Low = 12088.14 Dif = 13.44 (Acceptable 9.8 - 15) VCO Voltage all greater than 1.5 v, less than 7.5 v. BFO Test BFO High = 4917.42 (Acceptable >= 4916.3) BFO Low = 4912.34 (Acceptable <= 4912.7) Range=5.08 (Acceptable >= 3.6) Transmit frequency is +- 10 hz. However, zero beating a 600hz sidetone against the 7.00 Mhz birdie **appears** to be around 7000.35 Khz. (I never fully trust zero beating as I am tonally challenged...) Any ideas?? Howard W. Ashcraft, Jr. Hanson, Bridgett, Marcus, Vlahos & Rudy 425 Market Street, 26th Fl. San Francisco, CA 94105 ph: 415.995.5073 fax:415.541.9366 e: [EMAIL PROTECTED] * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] INFO 080 --K2/100 in distress
My K2/100, serial 4375 has worked flawlessly for several years. This evening, I fired it up and received an INFO 080 message. There are a number of symptoms. First, the K2 works somewhat intermittently. I tried using in on CW and found that it would operate below 5 watts, but was erratic above that level. Keying the transmitter above 5 watts would cause a staccato burst of transmission (like a string of dits) regardless of what direction the iambic paddle was keyed. Using tune, however, did not cause the intermittent operation. If you turn the unit on, sometimes you get an INFO 080 message, sometimes you do not. Sometimes it seems to reset itself from transmit to receive. The U1 voltages on pin 1 and 20 are correct. However, there should be 6v on pin 2 and it is 0. U9 and U10 are supposed to have 0.2 and 0.15 volts respectively, but are at ground. Not suprisingly, Z5 shows no sign of life. Changing bands results in relays clicking, but the voltage drop that should be seen on pin 1 also appears intermittent. Sometimes I see a voltage drop, sometimes I don't. I also have the sense that the bands switch more slowly than usual, although this may just be my perception. Z5 being quiet would obviously hinder I/O, but I am not convinced it is at fault because there is no voltage on the associated U1 pins. It it seems equally likely that U1 is damaged. Any suggestions other than swapping out Z5 and U1? (BTW, all connections are good and complete). 73 Howard W. Ashcraft, Jr. W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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 Linear Amplifiers
I have searched the reflector for information regarding the status of the Elecraft linear amplifiers without any responsive hits. What is the current status? HOWARD W. ASHCRAFT, Jr. Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 425 Market Street, 26th Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 995-3460 * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] Solvent
For an example of what damage can be done, I am restoring a Tek SC504 oscilloscope where someone used contact cleaner/solvent on the channel 2 attenuator. This caused corrosion of contacts and debonding between contacts and carrier. It is fixable, but I sure wish some tech in the past hadn't taken the "quick" route of spraying chemicals inside precision electronics. I am cleaning it up with alcohol. Howard W1WF -Original Message- From: Ron D'Eau Claire [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 13, 2006 9:44 AM To: 'Elecraft' Subject: RE: [Elecraft] Solvent I'm sure others will suggest many options although if you read the Elecraft manuals you'll find, in bold type: "DO NOT use ... solvents of any kind. Use of any of these will void your warranty." If you need to clean your boards you're probably using too much solder. Try a smaller diameter solder. If you look at the photos of assembled boards in any of several Elecraft assembly manuals including the XV 50, 144, 222 or 432 transverters, the KX1, the T1 antenna tuner or the WM1, AT1 or AF1 mini-modules, you'll see boards I built up while writing the assembly procedures for those kits. Those photos are the boards as they came from the soldering iron. If you look closely, you might see a few dark spots of flux here and there, but they're tiny and insignificant and often in a place where I installed and removed a part several times as the design was finalized. To be certain the kit can be built exactly as described, I never use any tools that are not specifically listed in the manual. That means no fancy high-powered vacuum desoldering tool to clean up pads; just braid or the SoldapulltR "sucker" listed under "Tools Required". I will admit to taking a small swab with some isopropyl alcohol to an individual, particularly messy solder pad when I needed to re-shoot a picture after many component changes, especially when, after many resoldering, some flux escaped the pad itself and ran onto the PCB, but that's the extent of any flux removal. I moisten a Q-tipR or similar swab with alcohol, then place it on the flux and spin the tip to scrub that spot and loosen the flux. Ron AC7AC -Original Message- Hi Folks, I'd like to know from the collective wisdom what solvent may be used on Elecraft PC assemblies to remove some residual flux and flux smears. It seems to me that a solvent that wouldn't harm boards and components was isopropyl alcohol (rubbing alcohol) in the old days. What do you Elecraft Builders use! Thanks, Bill NA7Y * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] Recomendations on Oscilloscopes
Everyone has favorites, but the older Tek analog scopes are very solid and a good deal. If you have the room, you can get amazing performance/cost from 7000 series scopes. I have a 7854 (400 mhz plus waveform digitizing) and a 7934 (500 Mhz Analog storage) 7000s run from 100mhz to 1Ghz in bandwidth, and, depending upon the plug-ins chosen, you can do just about anything with a 7000 series. Their primary drawback is size. Both of my scopes are on carts because they would take up a big chunk of my bench, otherwise. Tek also made a very nice series of "portable" scopes. The 100 Mhz 2246 is very nice and readily available used. It has the added bonus of "smart cursors" to easily measure amplitude and period/frequency with a single button push, and I have found the triggering to be quite good. The 2400 series, and particularly the 2465s are also nice pieces of equipment, but are more expensive due to their greater bandwidth. What you "need" really depends on what you "want" and what you are going to do with it. The higher bandwidth devices are useful if you need to look at abberations in a signal that may be smoothed out in a lower bandwidth scope, but may be unnecessary if you just want to trace a signal through a circuit and measuring changes in amplitude or phase. Extra bandwidth is never a bad thing, it just costs more, and may not be necessary. Now to stir up the controversy, I used to have a Tek 465. This is a venerable 100 Mhz scope, but frankly the 2246s that I have had worked better and were much easier to use. So, I would recommend a scope more recent than the 465/475 series. But there are lots of these still out there and are very much liked by some. My one experience repairing a 465 may have colored my view. Howard W. Ashcraft, Jr. W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] New Mini-Modules - They're here!!
If you are looking for a finished power meter kit, you should check out the LP-100, by fellow elecrafter Larry Phipps. (www.telepostinc.com) It is a very well thought out and attractive unit (neat pld display) with power, swr and vector measurements. I participate in the LP-100 reflector and, from the comments, everyone seems to be quite pleased. I think he is starting another kitting run. Howard W1WF -Original Message- From: Darwin, Keith [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 27, 2006 6:02 AM To: elecraft@mailman.qth.net Subject: [Elecraft] New Mini-Modules - They're here!! Hey guys, did you see? Three new mini modules are on the order page and their manuals are available for download. - Power meter - AF filter - Stepped attenuator I looked them over and gotta say, I was very disappointed. I had really envisioned a meter in a case that would match my K2. Something with a backlit LCD that would display power and SWR to with 2 digits each (11 watts, SWR 1.2). I had plans to sell my Palstar meter (which won't do QRP well) and get the Elecraft meter but now I'm really having 2nd thoughts about that. The audio filter looks really cool but, again, no case. A power meter and an audio filter to me are not test equipment things, their part of the basic station equipment. They'd get used every time I'm on the air and as such they really should be in a finished case with real silk screen labels and knobs. It's not clear to me that either one could be mounted in a box as the components & connectors may project too tall above the board and could interfere with the pots & LEDs as they try to project through the front of the enclosure. - Keith KD1E - - K2 5411 - * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] External 12V with the KX1 necessary?
I travel with a KX1 and have had very intermittent success using internal batteries. At this power level one is at the will of the propagation gods, and when I'm traveling my opportunities to use the radio rarely line up with better conditions. That said, I have had periods when 2 watts seems to be OK and other periods where I can hear stations clearly but NO one answers a call. It is very frustrating to hear a station continually call CQ and never hear your response. In those instances I really wished for a little more power to make a few QSOs in the limited time available. My internal ATU seems quite happy with an outside power source, btw. I have gotten a Buddipole, which has helped, and which works better for me than a random wire. It also doesn't have the logistic problems of carrying or finding something to support a wire antenna, but is a little tricky to tune at 40m. Howard Ashcraft, W1WF -Original Message- From: Michael Madden [mailto:[EMAIL PROTECTED] Sent: Sunday, August 20, 2006 1:15 PM To: elecraft@mailman.qth.net Subject: [Elecraft] External 12V with the KX1 necessary? Hi group, I've been having a lot of fun with my KX1 out near the San Francisco Bay. I have worked coast-to-coast in the US and DX highlights include FO5 Tahiti and CM6 Cuba. A question on power output: what are your opinions on the value of 12V from an external battery? I.e., 4W vs. 2W? I have had some intermittent ATU problems with the KX1 when on external 12V, so I often need to revert to internal Li AA's. I am wondering what your opinions are on the need for 3dB gain on the KX1. I have tried to do some on-air A/B testing between internal and external power. The guys on the other end usually say "FB on 2W." But I have also gotten some "are you still there." Anyone else do such A/B testing on the air? Any conclusions? Thanks, Mike N9OHW __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. * ___ 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] OT: Obsolete Transistor MS1700G
I am working on a power supply with a linear regulator circuit containing two MS1700G power transistors that have shorted. I don't think they are in any way exotic, and I'm sure there is a modern replacement. But I can't find any specification information anywhere to begin the replacement analysis. The only internet search results for a MS1700G are from distributors that have $250 minimums and are only providing a "quote." None of the normal providers (Digikey, Mouser, JAMECO etc. stock this transistor.) Does anyone have a reference or spec sheet information regarding these transistors? Thanks HOWARD W. ASHCRAFT, Jr. Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 425 Market Street, 26th Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] Ideas - new Elecraft Products
I don't think Wayne and Eric necessarily need my thoughts on their business plan...they seem to be doing quite well as it is. However, my two bits on future is that I would rather see a few, elegant projects than a project for every interest. What Elecraft has done well is to focus on the "elegant" portion of design, from the perspective that designs are elegant when they are simple and highly effective. This generally means focusing on performance and simplifying interfaces. It takes a lot of engineering (and cost) to create fancy interfaces that do not improve basic performance of the receiver, transceiver or test instrument. So, I think the mini-modules are good ideas, but test equipment in general is not. As a practical matter, you can buy extremely good used test equipment at a fraction of the original price if you want to go in that direction. (Ask my xyl whether it is possible for someone to buy lots of used test equipment...) I seriously doubt you could build an oscilloscope kit that rivals either the Tek 7000 series or the Tek portables for anywhere near their current prices. Ditto for signal generators if you include wide coverage, modulation options, precision output and frequency control. And then there is the calibration issue... And while I will continue to buy Elecraft gear (if there is a K3, I'm a clear candidate), I also think that it is good for the amateur community to have a variety of quality products/kits available. If you are interested in an swr/vector power meter, look at the LP-100 that is just being released. There are also some nice kits available if you are happy with surface mount. (Actually, I find surface mount to be pretty straight forward, even with my 54 year old eyes and would like to have had my KX-1 as a surface mount kit.) I'm also quite impressed with the Buddipole products carried by Elecraft, as well. So, I like the approach of Elecraft working on core projects and supporting related projects by other designers and manufacturers. (Buddipole, Heil) >From my perspective, I would like to see Elecraft address performance issues in the K2, such as the SSB board, noise blanker, and the birdies, especially in the K2/100. I'm looking into quieting the audio on the K2, which may turn out to be useful. The user interface could also use improvement so that it doesn't require remembering button press sequences and remembers settings across bands. A slave receiver based on the K2 would also be an interesting project. I'm also probably going to build a small linear for the KX-1 because I get very frustrated listening to people who don't answer... But I think that may be a homebrew. Summary: 1) Elecraft is great. 2) But the amateur community needs more than one option 3) Elecraft should stick to "elegant" gear 4) And support quality related products Ok, it was 4 bits. Howard Ashcraft, W1WF -Original Message- From: Fred (FL) [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 23, 2006 5:19 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Ideas - new Elecraft Products K2/K1 Owner-builders I posted a "Elecraft New Product Ideas" email last week - which received mixed responses - "good", "old stuff", "too difficult for Elecraft", "done that ", "won't work", etc. I think Elecraft is a great ham company. And as every builder knows - their support to us the ham community - is superb! And their quality of products and kits is excellent and higher. I'd suggest, we K1/K2 builders - continue to send in "product ideas" to Elecraft, via this email list - and let Elecraft Management know, what product ideas we'd like to see and what product ideas might help us in our amateur endeavors. We might be surprised, and see some of them come to reality. If they have to hire another designer & tech or two, so be it. If you like the product(s) which Elecraft now markets and sells - I myself, would like to continue to buy my next products from them too. Frankly I've never been fully satisfied with MFJ items - for some reason many of them look aluminish and of poorer quality. BUY ELECRAFT, TELL ELECRAFT WHAT YOU'D LIKE and WHAT YOU THINK WOULD BE HELPFUL, FOR OUR HOBBY! My Kits - short list 5/23/2006: - outboard RF OUTPUT METER Indicator (in-line) - inboard RF OUTPUT INDICATOR (panel, neon/eye) - outboard POWER METER (ala Birdy), w/SWR option - poor man's 6146 200w PEP outboard TUBE AMPLIFIER (relive your youth) (FCC ham-project form) - matching Elecraft 6146 AMP POWER SUPPLY - 200w match-anything TUNER (coils, meters, R/L/C's) - a HF K3 TRANSCEIVER, with general coverage, 2 meter, 440, and bigger footprint & displays - an Elecraft K2/K3 MOBILE MIKE, w/up-down, functions - an Elecraft quality, HEADPHONE set, K1/K2/K3 - a couple HF porta-ANTENNAs, back pack carryable - a "hide-able" HF ANTENNA (gutter?, bush?) - Elecraft Mobile VERTICAL ANTENNA (hf, tuneable) - Elecraft SCOPE for alignment jobs - Elecraft SIGNAL GENERATOR, for al
RE: [Elecraft] K2 AF noise level?
I thought of that, too. However, I would like to see whether clean, full range audio works better on ssb. Also, passive filtration results in some insertion loss. Anyway, the point is to experiment, which is what I will be doing. It would be interesting to compare the approaches. Thanks. Howard W. Ashcraft, Jr. Hanson, Bridgett, Marcus, Vlahos & Rudy 425 Market Street, 26th Fl. San Francisco, CA 94105 ph: 415.995.5073 fax:415.541.9366 e: [EMAIL PROTECTED] -Original Message- From: David A. Belsley [mailto:[EMAIL PROTECTED] Sent: Wed 5/17/2006 3:15 PM To: Howard W. Ashcraft Cc: Darwin, Keith; elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 AF noise level? Why not build yourself a simple low-pass audio filter? Even a simple capacitor across the earbud leads will do quite a bit. Try 10mf or 20mf or even 50mf. If that isn't satisfactory, a slightly more sophisticated single-section LC filter would sure do what you want. Check the Handbook for needed values. best wishes, dave belsley, w1euy On May 17, 2006, at 4:43 PM, Howard W. Ashcraft wrote: > One source of noise is in the K2 audio amplifier. It isn't much of > a problem with the standard speaker since there is a built-in high > frequency roll off. However, if you use very good quality earbuds > that were designed for music, the hiss comes through loud and > clear. I like to use the buds because they block out virtually all > ambient noise and let me concentrate on CW. (I need all the help I > can get). > > I have ordered some sample chips from National Semiconductor to see > if a low noise headphone amp will improve the situation. I > probably won't get the chips for another two weeks and will have to > spend some time experimenting, so I probably won't be able to > report for a while, but will report back when I do. > > Howard W. Ashcraft, Jr. W1WF > Hanson, Bridgett, Marcus, Vlahos & Rudy > 425 Market Street, 26th Fl. > San Francisco, CA 94105 > > ph: 415.995.5073 > fax:415.541.9366 > e: [EMAIL PROTECTED] > > > > From: Darwin, Keith [mailto:[EMAIL PROTECTED] > Sent: Tue 5/16/2006 6:45 AM > To: elecraft@mailman.qth.net > Subject: [Elecraft] K2 AF noise level? > > > > Hey 'Crafters, > > I'm debating between the KAF2 or an outboard audio filter for my K2. > Possible choices are the SCAF-1 and an Autek QF1A. > > My goal is to greatly reduce the hiss that is there in the headphones > when the narrow CW filters are engaged. I'd also like to add some CW > selectivity. A notch would be great too. > > KAF2 has the benefit of being integrated into the rig but doesn't > offer > lots of flexibility. The others are external but give you more > control > over the filtering. > > How well does the KAF2 kill the hiss? I assume it does great for > that. > Does it add any noise back in? > > - Keith KD1E - > - K2 5411 - > > > > > > > > * > This communication, including any attachments, is confidential and > may be protected by privilege. If you are not the intended > recipient, any use, dissemination, distribution, or copying of this > communication is strictly prohibited. If you have received this > communication in error, please immediately notify the sender by > telephone or email, and permanently delete all copies, electronic > or other, you may have. > > To ensure compliance with requirements imposed by the IRS, we > inform you that any tax advice contained in this communication > (including any attachments) was not intended or written to be used, > and cannot be used, for the purpose of (i) avoiding penalties under > the Internal Revenue Code or (ii) promoting, marketing or > recommending to another party any transaction or matter addressed > herein. > > The foregoing applies even if this notice is imbedded in a message > that is forwarded or attached. > * > > ___ > 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 - david a. belsley professor of economics * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is
RE: [Elecraft] K2 AF noise level?
One source of noise is in the K2 audio amplifier. It isn't much of a problem with the standard speaker since there is a built-in high frequency roll off. However, if you use very good quality earbuds that were designed for music, the hiss comes through loud and clear. I like to use the buds because they block out virtually all ambient noise and let me concentrate on CW. (I need all the help I can get). I have ordered some sample chips from National Semiconductor to see if a low noise headphone amp will improve the situation. I probably won't get the chips for another two weeks and will have to spend some time experimenting, so I probably won't be able to report for a while, but will report back when I do. Howard W. Ashcraft, Jr. W1WF Hanson, Bridgett, Marcus, Vlahos & Rudy 425 Market Street, 26th Fl. San Francisco, CA 94105 ph: 415.995.5073 fax:415.541.9366 e: [EMAIL PROTECTED] From: Darwin, Keith [mailto:[EMAIL PROTECTED] Sent: Tue 5/16/2006 6:45 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K2 AF noise level? Hey 'Crafters, I'm debating between the KAF2 or an outboard audio filter for my K2. Possible choices are the SCAF-1 and an Autek QF1A. My goal is to greatly reduce the hiss that is there in the headphones when the narrow CW filters are engaged. I'd also like to add some CW selectivity. A notch would be great too. KAF2 has the benefit of being integrated into the rig but doesn't offer lots of flexibility. The others are external but give you more control over the filtering. How well does the KAF2 kill the hiss? I assume it does great for that. Does it add any noise back in? - Keith KD1E - - K2 5411 - * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] Buddipole on 2m?
I am considering purchasing a buddipole from elecraft for portable hf use. This weekend I need to set up a 2m base station to provide communications for a local bicycle race. The buddipole literature indicates that it works from 2meters through hf. Has anyone tried to use the buddipole for 2 meter repeater work. I'm assuming I will need to orient the buddipole near vertically or otherwise to achieve vertical polarization. My real reason for wanting a buddipole is for travel with my KX-1, or field use with the K2/100, but if it will solve the immediate problem, it may get me moving to make the purchase! Thanks, Howard Ashcraft, W1WF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, May 05, 2006 1:01 AM To: elecraft@mailman.qth.net Subject: Elecraft Digest, Vol 25, Issue 5 Send Elecraft mailing list submissions to elecraft@mailman.qth.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.qth.net/mailman/listinfo/elecraft or, via email, send a message with subject or body 'help' to [EMAIL PROTECTED] You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than "Re: Contents of Elecraft digest..." * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] Steppir Vertical and K-2
I have Steppir 40 meter vertical and I am very pleased with it. My worst match in any of the bands is 1.4:1 and most matches are around 1.1 or 1.2. I do not use an antenna tuner, although I have considered building a tuner since I have heard you can work 80m with a tuner, although obviously not as well as if you had a proper 80 meter antenna. My installation is on my roof, so I have two radials/counterpoises per band on a steeply sloping roof. If you can't put in a directional antenna, the Steppir is a very good choice. It "should" be completely configurable from the K2 and I believe that others have done so. If you look at Larry Phipps site, www.telepostinc.com he has additional software utilities he uses with his K2 and a Steppir antenna. I seem to recall that either Eric or Wayne has a Steppir vertical, so they might be able to comment as well. You use the Kenwood command set to control the Steppir from a K2. However, I started to configure the automatic tuning and decided not to. First, you pick up extra noise while the antenna is moving, obscuring weak signals. It can take some time to go from 10 meters to 40 meters. Yet the antenna works reasonably well on receive even if wildly off tune. So I often will hunt around for where I want to work without moving the antenna and then tune the antenna to my chosen frequency before transmitting. This seems to be quicker than having the antenna tune all of the time, and saves significant time when you are jumping around between bands. If I'm not jumping between bands, I'm generally in the lower CW segments where tuning the antenna to 7050, for instance, covers everywhere I want to go on 40 meter CW. (The resolution is only 50 khz, so your choices would be 7000 or 7100) So, although I have all of the options to allow automatic tuning, I don't use the feature. I strongly endorse the antenna, but am ambivalent about the automatic tuning feature. My two bits (Ok, more like 4 bits...) 73, Howard Ashcraft, W1WF -Original Message- From: John Wiener [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 19, 2006 8:46 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Steppir Vertical and K-2 I just discovered the Steppir Vertical on the web. An interesting design: using a copper tape and step motor to vary the height of the vertical element. This can be controlled directly by interface with a transceiver. Does anyone have experience with this antenna and the K-2? Is the K-2 capable of controlling the step motor so that vertical length is correctly (and automatically) varied based upon operating frequency? Thanks! John AB8WH * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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, Audio Hiss
I was listening to 40 meters late last night (virtually no one there so I had some time to fool around with the rig) and noticed the level of audio hiss in the K2. With RF gain off completely and AF gain fully advanced, there is a fair amount of hiss. This is also noticeable at operating levels and is a distraction from listening to weak signals. (obviously the operating af gain is set much lower and the hiss is also less obvious. Since I usually use a very good set of in ear buds, I normally have the AF gain way down) All audio amps will create hiss at some gain level because you are amplifying noise that is inherent in the components. But I'm wondering if anyone has tried to mod the K2 to create a quieter audio amp? This appears to be an areas where some improvement is possible and it would make the K2 more pleasurable to use and weak signals more easily heard. I seem to recall from way back that we used to mod Dynaco stereo preamps by replacing carbon resistors with low noise equivalents (usually wire wound at the time) replacing potentiometers with gang switched low noise resistors, etc. Some semiconductors and ICs also have low noise equivalents. 73 Howard Ashcraft W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] OT: Looking for parts for old test equipment
I know this is OT, but the group usually has good suggestions. I am repairing a Fluke 6080a/an signal generator. As it turns out, in its prior life, someone damaged the A5 coarse loop vco board, and it looks like I will need a new board, not just component replacements. There is a Tektronix reflector that is often helpful in finding Tek parts. Can anyone point me to a usenet group or otherwise where information and parts for older test equipment, such as the Fluke, can be found. I would really like to resurrect this generator as it mostly works, is very nicely built, and has good ergonomics. Regards, HOWARD W. ASHCRAFT, Jr. Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 425 Market Street, 26th Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] OT: Fluke 6080a/an Service Manual
I have searched the internet in vain looking for a Fluke 6080a/an signal generator service manual. Fluke does not post this particular manual on their site and I have only been able to find an Ops. manual. I am trying to restore a mostly functioning generator and the ops manual does not have sufficient information. Any suggestions as to where a service manual might be found? Thanks. Howard W. Ashcraft, Jr. W1WF Hanson, Bridgett, Marcus, Vlahos & Rudy 333 Market Street, 21st Fl. San Francisco, CA 94105 ph: 415.995.5073 fax:415.541.9366 e: [EMAIL PROTECTED] * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] OT: Mechanical Parts for Old HP Instruments
I have an HP 3314a synthesized function generator that is in very good shape electrically. However, it is missing the two front feet and the front bail. Does anyone know a good source or forum for getting old HP parts? I have had good success in getting old Tek parts, but googling on the internet has not turned up a comparable source for HP equipment. I am about to restore a Fluke 6080A/AN signal generator, so if there is a good source for Fluke, that would be useful, too. Thanks, Howard W. Ashcraft, Jr. Hanson, Bridgett, Marcus, Vlahos & Rudy 333 Market Street, 21st Fl. San Francisco, CA 94105 ph: 415.995.5073 fax:415.541.9366 e: [EMAIL PROTECTED] * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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 Adjustment--Use of Test Instrumentation--AlternativeProcedures?
Don, thank you for your comments. However, if you note my original message, I did not suggest purchasing test equipment for the purpose of adjusting and aligning the K2. I indicated that I was accumulating test equipment to pursue various design and repair interests. I agree that one can calibrate a K2 without extensive test equipment and I have calibrated my K2/100 and my KX-1 using the techniques suggested by Elecraft, Wayne Burdick, yourself and others and by all report everything works well. (I did use a DMM, Spectrogram and an Ngen for the K2.) And I also agreed, in my original posting, that you can figure all of this out yourself. However, there is a benefit to having established procedures and published measurements and tolerances. The technicians who calibrate my tek instruments presumably know what to do, but tek publishes very detailed procedures and tolerances in their manuals anyway. Similar information is available for other equipment and radios. Presumably there is a value to doing so. The issue here is not whether one can successfully calibrate a K2 or KX1 without instruments, but whether it is useful to publish calibration procedures and data for use if test equipment is available. That is all that I was suggesting. And there doesn't appear to be any harm in having alternative approaches. Yes, you can calibrate the frequency of a K2 by zero beating WWV. I was able to get within 20 hz by doing so. But it took about 6 passes on two separate evenings. Whether this was due to my inability to recognize a perfect zero beat, thermal drift from removing and replacing the K2/100 cover, or just general ineptitude can't be known. However, I have seen numerous posts from others who have spent significant time trying to achieve the possible frequency resolution of the K2 and have done so only after multiple passes. It may not be more accurate to use a frequency counter(due to the granularity of the K2 digital/analog conversion), but it is quicker. And I suspect that I could tweak some of the circuits (the KSB2 board comes to mind) by measuring existing performance and testing several of the modifications and suggestions posted or referenced on the reflector. Finally, I find calibration data useful for troubleshooting. This weekend I plan to work on a Tek function generator that is "a little off" in frequency stability. One of the first steps I will take is to run through the adjustment/calibration protocol to isolate misbehaving circuitry. So why not publish calibration data and alternative procedures? Anyway, thanks again for your thoughts and opinions. I appreciate all of the effort you and others put in helping to improve the Elecraft products and to assist builders with their varied problems. Howard Ashcraft, W1WF -Original Message- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Thu 11/10/2005 5:42 PM To: Howard W. Ashcraft; elecraft@mailman.qth.net Subject: RE: [Elecraft] K2 Adjustment--Use of Test Instrumentation--AlternativeProcedures? Howard and all, I must respecfully disagree. I have built many K2s and have aligned many others, and I can state from that experience that the test equipment required is minimal. The techniques in the current manual for setting the reference oscillator, especially the technique offered by none other than Wayne Burdick himself using CAL FCTR and alternating between TP1 and TP2 while tuned to WWV or some other known frequency achieves superior results. I use an accurate frequency counter, a DMM, a 'scope, and a computer loaded with Spectrogram to accomplish all that is required for proper K2 alignment, and even all that is not required - I consider the DMM and the computer with Spectrogram as essential, the rest are convenience instruments (see below). I would not use any additional equipment for the alignment tasks even if it were available. I happen to have acquired a frequency counter that is accurate to 10e-9 or better, and it does the job of setting the reference oscillator easier (I do not measure the reference directly, but compare the CAL FCTR reading obtained at TP1 with my external counter), but is not more accurate than checking the difference between the VFO and BFO while tuned zero beat to the WWV carrier - I come within 20 Hz using either method. For adjusting the bandpass filters (in transmit mode), I use my oscilloscope to indicate the RF voltage at the antenna jack (across my dummy load). Used in this manner, I am only using the 'scope only as a fast responding RF voltmeter and it allows me to see the peak more readily - this is only a convenience for me and not any necessity - an ordinary DMM with RF Probe or the K2 display itself would be adequate, but would not respond as quickly, so one would have to tune the slugs and capacitors more slowly. For aligning the filters, I have found no better or more convenient method than Spectrogra
[Elecraft] K2 Adjustment--Use of Test Instrumentation--Alternative Procedures?
The K2 Manual, and various posts to the Elecraft website or this reflector, provide substantial information regarding K2 adjustment, c22 calibration, filters, etc. These generally assume that one doesn't have access to test instrumentation beyond a DMM and the frequency counter built into the K2. This is laudable since it has allowed me, and many others, to build and calibrate a K2/100 without investing in an electronics lab. However, I have been slowly accumulating good test equipment to pursue various design and repair interests and will soon be going over my K2/100 and my KX1 using these tools. It would be helpful to have adjustment and calibration procedures available that alternatively assume the use of test instrumentation. Although one can admittedly figure a lot of this out yourself, having a procedure/check list reduces the possibility of error. And in some instances, the sequence of adjustment can be significant. Since potential purchasers might be put off by reference to "set the spectrum analyzer to" the alternative calibration procedures could be available on the website with the primary calibration procedures (those currently used) being contained in the manuals. This would reinforce the concept that the K2 can be successfully built with a minimum of equipment. Howard Ashcraft, W1WF * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] OT: Oscilloscopes
I currently considering replacing my existing oscilloscope with an older Tek model. Two possibilities would be a reconditioned 465b or a 475. I am acquainted with the 465. I can't find any discussion of the distinctions between the 465b and the 465 other than a vague statement of "improved electronics" and the differences in panel layout. Other than bandwidth, the 475 appears to be identical to the 465 and there doesn't appear to be an "improved electronics" b version. Any opinions on the relative advantages and disadvantages of these scopes would be appreciated. HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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 S meter calibration
I believe the S9 "standard" is 50 millivolts, which is 50 microwatts at 50 ohms [v**/50], which is -13 dbm [10*log(50uw/1mw)]. So, I would say that +7 dbm would be your level. As always, check the math and the logic. (I'm sure someone on the reflector will spot an error.) -Original Message- From: Mike and Alicia Fanning [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 24, 2005 7:07 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KX1 S meter calibration I'm trying to calibrate the S meter on my newly finished KX1 by cheating and using a good signal generator at work during my lunch break. The KX1 manual suggests using another receiver tuned to a strong (S9+20 dB) signal as the "reference standard", and then setting the KX1 S meter to full scale (6 bars) using this same signal as a reference. What level should I set my sig gen to to generate an S9+20 dB signal level? I realize it's a relative thing, but I don't want to put too much signal into the radio and burn up the front end. Thanks! Mike, K4GU * This communication, including any attachments, is confidential and may be protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. * ___ 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] Low/No Power on SSB
I have a late model K2/100 that I mostly use on CW. In the past, I have made successful contacts on SSB, but haven't tried for 6 months or so. Last night, I was scanning the phone side of 20 meters and heard a dx station that I tried to contact. He never heard me. I then heard a local station and tried to get a signal report, but he could barely hear me and reported that I was dropping off badly. I got suspicious and put an rf meter on the output. On CW, key down, I get the full 100 watts on 20 and 40. On SSB, when I speak loudly, I get a very short, low level output, that falls to nil almost immediately. The brief output is reading in the 10-15 dbm range--very low--and then it drops to a few dbm.* It smells like the ALC circuitry has gone south, and I will be investigating that in the next few days. However, if anyone has any suggestions as what other sections could cause this to occur, I would appreciate the heads up. Thanks in advance, *I am using an uncalibrated RF power meter (PIC power meter from recent QEX/QST articles) through a 40db tap. Although I need to calibrate the meter, it is relatively sensitive and appears to be "close" using default settings. In any event, the relative measurements, show that there is a significant problem on SSB but not on CW. HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 This communication, including any attachments, is confidential and is protected by privilege. If you are not the intended recipient, any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or email, and permanently delete all copies, electronic or other, you may have. To ensure compliance with requirements imposed by the IRS, we inform you that any tax advice contained in this communication (including any attachments) was not intended or written to be used, and cannot be used, for the purpose of (i) avoiding penalties under the Internal Revenue Code or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. The foregoing applies even if this notice is imbedded in a message that is forwarded or attached. ___ 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] OT: Calibrated Signal Generator
I recently built the rf power meter discussed in the last QEX and QST issues. It was a fun project and works very well. However, it needs to be calibrated and this requires either an accurate (i.e. calibrated) reference meter or a calibrated rf signal generator capable of -70 dbm to +7 dbm (or somewhere close to those numbers). Unfortunately, no one in my local club has such equipment and several calls to possible sources have not been fruitful. I am located in Alameda, CA. Does anyone have a calibrated signal generator or know where I could get access to one? Thanks Howard Ashcraft, W1WF ___ 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: slow CW
I don't think you want to take the speed below 10 wpm. If you can't copy at that speed, increase the space between the letters. If the letters themselves are too slow, they can be hard for others to copy. Increasing the spacing between letters will give you time to "compose" the next letter and will signal operators not to squirt 20 wpm back at you 73 Howard Ashcraft, W1WF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, June 09, 2005 1:01 AM To: elecraft@mailman.qth.net Subject: Elecraft Digest, Vol 14, Issue 10 Send Elecraft mailing list submissions to elecraft@mailman.qth.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.qth.net/mailman/listinfo/elecraft or, via email, send a message with subject or body 'help' to [EMAIL PROTECTED] You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than "Re: Contents of Elecraft digest..." ___ 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] Antenna Analyzers
The Palstar unit is based on a design developed by AmQrp, its AA-908 based on the Micro 908 platform. The Micro908 is more flexible than the Palstar, but the antenna analyzer circuitry is similar. There is a substantial reflector community for the Micro908 and the designers monitor the reflector and are quick to respond. The reflector archives also have some discussion of the Palstar unit since it is a derivative of the Micro908. AmQrp releases the Micro908 as a kit as soon as they can put together enough to issue. I believe there are about 300 micro908 units in existence. I have a later micro908 and it functions quite well. I also use it as a DSP with my KX-1 (It uses the same dsp board as in the K2 dsp filter.) It is a scanning antenna analyzer and there is free software that allows you to control the unit from a computer or a Palm PDA. In both cases, the scans are plotted on the computer or the PDA. You can get more details on the Micro908 at the www.amqrp.org. I think they are currently sold out, but an email would get you a reply as to when they could be available. Note: the kit is virtually all surface mount components, many very, very small. So if you don't like handling surface mount, then you should pass or have someone build it for you. Howard Ashcraft, W1WF -Original Message- From: Larry Phipps [mailto:[EMAIL PROTECTED] Sent: Thursday, April 14, 2005 9:51 PM Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Antenna Analyzers In addition to my professional bench gear, I have an MFJ, Autek and AEA CIA Analyst. I use all but the Autek and AEA regularly and find they each have a purpose. When I want a to do a quick check of resistance, reactance, SWR or return loss on the bench I grab the AEA... especially if I want a quick plot to go with it (using the included software and serial connection). It is a bit too slow and definitely too heavy to carry up the tower though. The Autek is the one I always grab when going up the tower because it is fast and small. It is also quite accurate. The tuning is a bit touchy as mentioned in the article, but I find it a quite useful tool. I don't hate the MFJ, I just like the others better. I have heard a lot of horror stories about MFJ, but the few things I have work as advertised. My units may just be good ones, while others may not be as good. For better or worse, QST tends to rate the products by the performance of the tested unit, not anecdotal evidence or feedback from the field. Larry N8LP Stephen W. Kercel wrote: > There is an interesting piece in the May 2005 QST. It has product > reviews on four different antenna analyzers. > > Two that were included are the MFJ-269 and the Autek VA-1. I have > heard endless horror stories from many hams about both, abysmal > quality control, virtually useless tech support and so on. None of > these negatives are mentioned in the QST product review. > > There is also a new product favorably mentioned in the review, the > Palstar ZM-30. Since the MFJ and the Autek are apparently both junk, > despite being favorably reviewed in this article, I'm not sure whether > I can trust the product review on the Palstar. > > Anybody have any experience with it? Is it any good? > > 73, > > Steve Kercel > AA4AK > > > ___ > 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] many thoughts, somewhat at random
Steve, Just a comment. Your discussion, below, was a very friendly, but solid piece of advice to builders with little prior experience in electronic design/troubleshooting. Good post. I would add that in the darkest moments of kit building you actually learn most about what you are doing and how your equipment works. It is satisfying when everything fires up perfectly when the last solder joint cools, but you really begin to understand what is going on when it doesn't--and you have to spend a few hours (days?) pouring over the schematic and checking readings to determine what went wrong. In the end (if you didn't fry anything expensive) you probably gained as much as you lost. Something to remember when the #*#$% thing doesn't work. Howard Ashcraft, W1WF -Original Message- From: Steve Jackson [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 13, 2005 8:03 PM To: elecraft@mailman.qth.net Subject: [Elecraft] many thoughts, somewhat at random N5VWN wrote: "I'm at my wit's end trying to figure out why there is no words appearing on the K2 on the phase 1 test." I've felt frustrated many times while building, too, and I've been at it over 30 years. You are not alone. But you've buit a Rockmite and a Pixie. The K2 is WAAAY easier to make work than either of those rigs. My comments, for what they are worth: 1. if I got a K2 for $12, in ANY condition, I'd be dancing an Irish jig! you're starting out WAY ahead of the game ... 2. ... on the other hand, one of the things I have learned to probably not try again is building a kit somebody else started! ;) probably including myself, at an earlier age. 3. Stockton alone has 7 times the number of hams in it that my ENTIRE rural NC county does, yet there are FOUR other K2 rigs/owners here! In Stockton, I'd try to find a local, experienced Elmer to come by and help in person. There's NOTHING like learning from an expert, and NO replacement for having a helper there, IN PERSON. Surely, there MUST be at least ONE local, capable, and willing Elmer, the odds are very much in favor of it. Stockton also has at least one well-known ham club, a great way to find the right person. 4. Hardly anyone ever says this, but, it should be said ... nobody should try to build or fix an electronic *anything* without having an ammeter in line. The current drawn (or, not drawn) by a device-under-test is THE #1 most telling thing about what's wrong with a recalcitrant circuit. If you don't have a handy ammeter, run, do not walk, to go get one, or make one by using a 1 ohm resistor in series with your device and then measure the voltage drop across it. 1/10th volt equals 100 mA and so forth, that is why Ohm's Law is on the test! A good digital voltmeter can be bought at Sears (readily available) and while it probably has a milliammeter in it, it's actually easier to put the shunt in series and use the voltmeter to go back and forth from the shunt to the circuit tests. 5. Another ageless truism is that there's no more useful a piece of test gear than an oscilloscope. Of course, one would need to be taught to use one, and you'd also have to have one ... neither are hard at all ... and this one piece of gear could make the difference between an enjoyable hobby and a frustrating discouragement. Consider making the time investment (I would have said money too but these days a good used 'scope is so cheap as to be laughable). 6. A current-limited bench supply, preferably with variable voltage and adjustable current limiting, can be your best friend. There are some mighty nice used ones around I've seen at hamfests for $10 or $15, and even a decent new one can cost as little at $45. I just got three of some little Chinese knockoff mini bench supply from Circuit Specialists, for work. They are very inexpensive and reliable. No, they are no threat to Lambda or HP, but, hey ... 7. The reason I've suggested these extra goodies is that they make things go faster and smoother. Because I have the experience, I can probably make do without any of them; indeed, I *have* made do without ... that is HOW I got the experience in the 1st place! You don't absolutely need this stuff, but, based on your QRZ! profile, it looks like you're a budding builder. Take it from me, don't do things the hard way like I did (soldering with hot nails, using strips of aluminum foil for wire, etc., I've done it all), get some decent shop equipment and never look back. 8. Please post some specific results of your tests so far. For example, "I turned it on and it doesn't work" is not nearly as useful as "I tested the voltage at U3, pin 4 and found it to be x.y and during the test the set is drawing about 475 mA" and so forth, to help others help you out. 9. This electronic medium is not at all a good way to troubleshoot electronic equipment, but it will do in a pinch, and you can make it much easier by providing specifics, in detail. Don't be afraid to write down every det
RE: [Elecraft] kx1 hotel qrv best antenna suggestion
I have had similar issues with using a random wire antenna and the KX-1. The random wire suggested in the antenna tuner manual works for receive, but no one hears me. It is very frustrating to be listening to S-9+ CQs where it is obvious that the sending station hasn't a clue I'm around. I have worked successfully with an MP-1 Superantenna, which can be connected to balcony railings, but I find that it works best if I use an antenna analyzer to pre-tune the antenna. I also use the KX-1 mostly for travel, so a good "hotel" arrangement would be very useful. By the way, I use the Micro908 Antenna Analyzer kit from AMQRP. Since it also works as an audio DSP filter (same DSP unit as the K2), I can use it for audio dsp with the KX-1 once I have adjusted the antenna. It works very nicely to reduce the ambient noise levels and gives you lots of filter choices. Howard Ashcraft W1WF -Original Message- From: Sergej Kindsvater DF6MU [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 05, 2005 4:54 PM To: elecraft@mailman.qth.net Subject: [Elecraft] kx1 hotel qrv best antenna suggestion hey KX1 users out there: what would be the ultimate hotel room antenna (that can be accomodated in laptop bag)? maybe a loop of some kind? I am always flabbergasted by the reports from kx1 users as to what everything they are able to achieve when using kx1 with a random wire, working from a park bench or similar... I have completed my kx1 something like a half a year ago and being a frequent traveller I am since taking it with me on every business trip. Till today not a single qso with a random wire out of a hotel room. I am currently in Yugoslavia. This time an old hotel, no beton walls, no BPL, fourth floor (Hotel Moskva in Belgrade), 10 meter long wire out of the window facing the Balkanska Ulic, two same length wires serve counterpose in the room- and my first qso with this setup, wkd UR5IF, qrb abt 1500 kms, not bad! Mike himslef has been running inly 5W into a LW. One other thing: when I am usisng an indoor antenna and a switching power supply, that worked well for FT817, I am getting three S units more noise, ferrite rings won't help. Thought maybe I should use those 12v 3300 mAh NiMh Racing battery packs people use for the plane models. Any opinion? Any airport security experience? many thanks Sergej DF6MU PS KX1 is good thing to brag about: recently in Tel Aviv I happened to have a breakfast at a hotel beside two hams from Ohio also on business there, heard them talking, engaged in a conversation and impressed them while having produced my Kx1 in a Pelicase 1060 out of my laptop bag right there! ___ 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] A minor C22 question
Last night I redid my C22 reference oscillator adjustment using WWV on 10mhz as the zero beat reference. This is the third time I have adjusted C22 and each time I am able to adjust C22 to a precise offset balancing TP1 and TP2. However, when I put the cover back on the K2/100 I find that WWV zero beats a few tens of hz off. (After last night's adjustment, the zero beat was 1.03) One should expect to be +- 10 hz as that is the finest resolution of the VCO, but it would be nice to get a little closer. The unit was thoroughly warmed before adjustment although there may be some temperature difference between having the cover on and having the cover off. This is hardly a big deal, but I wonder whether others manage to get an exact setting or whether this is a process that you repeat until you finally nail the adjustment. HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 ___ 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] Antenna Analyzer Opinions?
I would be interested in any experience/opinions with antenna analyzers. . I have read the E-Ham reviews and see mixed reviews on Autek and MFJ analyzers, mostly relating to build quality. AEA units are more favorably rated, but also more expensive. Does anyone have experience with the Micro 908 Antenna Analyzer kit? Thanks. HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 ___ 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] OT-Preserving CW memories
I have no personal memories as I am a relatively recent amateur. However, when I was growing up, one of our family friends was Thomas Roberts, a Captain for Pan American Airways. Tom got his start in the airline industry as a radio operator on the China Clippers. As I recall, and others will probably be able to verify some of this, the commercial news services used to transmit high speed code. I don't know what speed they used, but I recall that it was mechanically generated and very fast. He, and others of his generation, were able to copy the news broadcasts by ear. I can recall him pounding on a typewriter copying code and having the transmission stop well before he stopped typing. He never could type as fast as he could copy. As I can copy about 13-15 wpm under ideal conditions, I can only imagine what it must have been like copying code on the China Clippers with early radios and lots of electrical and mechanical noise from the plane, itself. Howard Ashcraft, W1WF -Original Message- From: Thom R. Lacosta [mailto:[EMAIL PROTECTED] Sent: Friday, December 10, 2004 3:52 PM To: elecraft@mailman.qth.net Subject: [Elecraft] OT-Preserving CW memories >From time to time I make a post reminding folks that there's a web site >where the content comes from a submarine radio operator (www.zerobeat.net/submarine) . I'd love to do a similar site with the memories and stories of folks who made their living pounding brass, whether aboard ship, at a Coast Station, Police Communications, Railroard or other venues. Yep...it appears that hardly anyone does any of the above now, and I'd like to preserve your memories on the web so that those of use that use and enjoy cw have a frame of reference other than amateur radiowhen you're not around, you'll take those memories with you. If ya have a mind to, drop me an emailI'll be happy to turn it into HTML and devote as much space on the server as it takes to tell the story of the magical music. 73,Thom-k3hrn www.zerobeat.net Home of QRP Web Ring, Drakelist home page, Free Classified Ads for amateur radio, QRP IRC channel Elecraft Owners Database www.tlchost.net/ Web Hosting as low as 3.49/month ___ 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 S meter
I set up my K2 S meter per the manual. It appeared to work "normally" with S9+ readings on loud signals. I then borrowed an X-gen and used it to "calibrate" the S-Meter readings. The "calibrated" settings were much lower than the "per manual" settings, i.e., a signal that was S-9 would read, after calibration, about S-5 or 6. I don't have a method for measuring the X-gen output. I do know that the K2 easily picks up the 1 uv low signal used for sensitivity testing. I will probably just go back to the earlier settings, but I was wondering if anyone else had a similar experience? HOWARD W. ASHCRAFT, Jr. Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 This communication, including any attachments, is confidential and is protected by privilege. If you are not the intended recipient, any use dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or e-mail, and permanently delete all copies, electronic or other, you may have. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. ___ 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] Circuit Simulation Software
I am looking for software (preferably Linux, open source) to model electronic circuitry. My primary interest is educational. I want to use the software to design and investigate circuits to better understand how they work. I may do a little design, as well. Does anyone have suggestions? HOWARD W. ASHCRAFT, Jr. Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 This communication, including any attachments, is confidential and is protected by privilege. If you are not the intended recipient, any use dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by telephone or e-mail, and permanently delete all copies, electronic or other, you may have. The foregoing applies even if this notice is embedded in a message that is forwarded or attached. ___ 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] K6XX Tuning Indicator
I assembled the SMD kit last evening and installed in in my K2/100. It all went smoothly, even though this was my first experience soldering SMD components. Strong reading glasses help. I had a similar tuning feature on a Yaesu 897. But it never worked very well and was reliable only on strong, clear signals where assistance wasn't needed. In contrast the K6XX works very well on a wide variety of signals. When the indicator is steady, I can pop into my tightest filters and the signal is centered. Moreover, tuning with the indicator is significantly faster than tuning by spot tone/ear. (for my skill level) Thanks to Tom Hammond N0SS for putting the kit together. It is a fun and useful "mod." HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 ___ 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] K2/100 RS232--No connection between radio and computer.
I can't seem to get the RS232 data port to work on the K2/100. There is no communication between the radio and either a computer or my Steppir antenna controller. I have: 1) Checked the cabling for pin connections, continuity and shorts. I built another cable, just to check. 2) Checked all components in the RS232 circuit for correctness. 3) Checked all solder joints in the RS232 or connecting circuits. 4) Checked the resistance across the RFChokes for an open connection/broken wire. 5) Checked the setting for the sidetone to assure it wasn't misset. 6) Tried using hyperterminal and Elecraft's control software. 7) Confirmed that the laptop's serial port was available and operating. Everything else in the K2/100 works fine. Any suggestions? HOWARD W. ASHCRAFT, Jr. W1WF ___ 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 Bias Setting
The KPA100 manual indicates that the current during bias setting will rise and that you should set the bias level based on current draw when you initially push "tune", not when the current level settles. On my KPA100, the current level rises very quickly after pressing "tune" making it difficult to determine what the "initial" value was. Repeating the measurement many times arrived at a setting when the rig was placed in "tune" that was relatively close to my calculated value. However, it was a touchy setting. One probably doesn't need to get a bias setting perfect, because you are trying to place the bias +- signal in the linear range on the transistor, but I would like to assure that my experience on bias setting is normal for KPA100s. BTW, the K2/100 works fine at all power levels and gets good signal reports. HOWARD W. ASHCRAFT, Jr. W1WF ___ 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] KSB2 Toroids T2-T3
I have completed the KSB2 board and everything seems to be working OK, but I am somewhat disappointed with the look of Toroids T-2 and T-3 and am considering pulling them and rewinding. The problem is that the toroids wound fine, but when the are installed on the board, the pc board holes are sufficiently far from the leads coming off the toroid that the windings get pulled out of shape. Off the board, the windings have a nice interleaving of red and green wire. On the board, the green wires partially ride over the red and some of the red wires cross over each other in order to fit the pc board. Is there a way to do a neater job? Should I care if it seems to tune up correctly? 73 HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] ___ 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 RX Sensitivity on 20M vs 30M, 40M
Yes. I also get less change (as compared to 30m and 40m) when changing RF gain. I have also noticed (as predicted by Elecraft) that the KX1 is sensitive to your choice of headphones. -Original Message- From: Michael Babineau [mailto:[EMAIL PROTECTED] Sent: Thursday, August 19, 2004 8:51 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KX1 RX Sensitivity on 20M vs 30M, 40M Have others noticed less RX sensitivity on the KX1 on 20M as compared to 40M and 30M? I recall that this was noted in the QRP Quarterly review of the KX1 a little while back and I have also noticed this on my own rig, so I am guessing that this is normal. Sensitivity is still sufficient on 20M but requires cranking the AF Gain a little higher on 20M than the other bands to get a similar signal volume. Michael VE3WMB P.S. This came to my attention again last night as I had to realign the Rig after finally getting around to installing the 30M module. BTW For such a little board the KXB30 was a real pain in the you-know-where to install! P.P.S I also put the Elecraft supplied sticker over the opening on the KXPD1 and it now looks much better ! ___ 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] K-2 PLL Reference Oscillator woes
The PLL is not oscillating--there is no frequency at TP3. It is not the frequency counter. The counter accurately reads the BFO and one side of crystal X1. I have checked all of the components in the oscillator (all correct, proper polarities) and have checked (many, many times) for any evidence of cold joints, bridges, etc.--everything is clean. The thermistor board looks very good, and to the extent possible (resistance measurements) checks out. The voltages on Q 19 are correct, and I can read a frequency (slightly fluctuating) on the side of X1 connected to L31. The other side of the crystal is dead. Everywhere in the circuit shows voltages, but no frequency--all the way to TP3. One thought I would appreciate comments on: Both of the diodes, D-16 and D-17, when measured in place, show a resistance of 16.35 k between their pins, regardless of polarity. Seemed odd, so I checked another ISV149 diode (D-21) and found that it exhibited a resistance of 25.4 M in one direction, and had an infinite resistance in the other direction. I know that measuring components "in circuit" can lead to erroneous results, and I could be measuring a resistance through RP2, but it seems odd that the resistance would be the same in both directions and is inconsistent with the measurement of D-21. Does it look like the diodes are bad? Any other thoughts on why the PLL is dead? Thanks. HOWARD W. ASHCRAFT, Jr. W1WF ___ 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] KX-1 S Meter
My KX-1 works like a charm, except... The S-Meter does not read accurately and does not calibrate. If I set it to no induction when there is no signal, then I get little or no indication with a signal. If I set it for a s-9 signal (using an injected S-9 signal) to peak the meter, then it reads several bars when there is no activity. It doesn't affect operations, but it is annoying. Is this normal? Do others have this experience? Any thought why this might react this way? Thanks, HOWARD ASHCRAFT W1WF ___ 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] KAF2 v. KDSP2
I am planning on purchasing a K2 for general use (SSB and CW) with a current preference for CW. (I enjoy working on CW although I'm not very good.) My preferences may change as my experience grows, so flexibility is important. The question is, why would you want to have the KAF2 instead of the KDSP2? From querying the archives, it seems that the KAF2 is primarily used for CW and is effective for that use. Is the KDSP2 less effective for reducing unwanted noise on CW, or is it equally effective but more costly. I assume that Elecraft continues to sell the KAF2 because it either has a performance advantage in some niche or is less costly and works for certain uses (such as CW). Thanks for the advice, Howard Ashcraft W1WF ___ 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] MP-1 Antenna KX-1
I have recently tried an MP-1 antenna with my KX-1. I used the small tripod mount and adjusted the antenna per the diagrams. However, this led to a SWR of 5.9. By moving the coil, I was able to lower the SWR to 2.0--but no lower. And it was exceptionally sensitive to adjustment. Moving the coil by a single turn of wire would jump the SWR to 2.0. In comparison, the KX-1 tunes on my Steppir IR vertical to no worse than 1.2 (with the autotuner engaged), tunes reasonably well on a 40 meter dipole, and tunes well with the random wire recommended by Elecraft. Is my experience with the MP-1 similar to others? Howard Ashcraft W1WF ___ 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/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
