RE: [Elecraft] KPA100 - 80m poor quality SSB
On Thu, 13 Jan 2005 20:20:05 +0100, Sverre Holm wrote: -Original Message- There is an Errata from Elecraft which does not appeared to have made it onto their Web site yet. It is:- --- K2/100 MANUAL (Appendix G) ERRATA Rev. C-3, December 14, 2004 --- The errata is there now, see http://www.elecraft.com/manual/E740035E%20KPA100%20errata%20rev%20C-3.pdf 73 Sverre LA3ZA http://www.qsl.net/la3za/ Thanks for the information Sverre. Unfortunately:- a) The Errata is under the manual section, with no reference to it from the builders notes or elsewhere as far as I can see. b) The description in the Errata only mentions the changes to the KPA100 SWR foldback, nothing about curing the RFC3 resonance on 80m. I think that this is where your excellent index of modification takes over. 73 Stewart G3RXQ ___ 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] Elecraft: Amplifier for K1
Thanks Bob, yes the resistors are metal film or something like that but definitely not wire wound. I spent a fair time on the air last night on 40/80 with the K1 and 100W from the TS520. It works like a charm. The K1 switches the TS520 T/R relays via a little 2 transistor switching circuit (looking at the K1 6R line) which grounds the TS520 PTT line. I built the circuit onto a small piece of vero board which plugs into the 3 pin socket on the filter board (like the official K2 mod) . A screened cable then connects the open collector to the PTT pin on the TS520 Mic socket. I've set the T-R delay to about 500ms so the relays don't switch too much. Do I need to worry about this? If I set it so that it switches say between each word will that wear out the relays too quickly, not sure how robust they are. When operating the K1 barefoot I use a T-R delay of 50ms. Thanks Martin M0KWV [EMAIL PROTECTED] on 13/01/2005 16:58:55 To:[EMAIL PROTECTED] cc: Subject:Re: [Elecraft] Elecraft: Amplifier for K1 Hi Martin, Got that fine. You have got the best of what is possible using the TS520 with the way you have done the mod. Just a point make sure you do not use 2 x100 ohm wire wound resistors for the dummy load. They must be carbon otherwise odd effects can occur due to inductance. You may be well aware of this effect, but I am pointing it out in any case as 2.5W is one of the standard dissapation values for wire wound resistors! Regards, Bob, G3VVT Why not take a look at our Web site? http://www.simoncarves.com * The information in this email and any attachments may contain privileged and/or confidential information intended solely for the use of the individual or entity to whom it is addressed. If the reader of this email is not the intended addressee, or the employee or agent responsible to deliver it to the addressee, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me by telephone or email and delete all copies immediately. * ___ 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 K1 Filter Bandwidth
I've had my K1 for 18 months and I still keep finding features I didn't know about! I just found out last night that I can change the filter bandwidth on line so to speak whilst I am listening to the received signal. Don't know why I didn't think of trying this before. Maybe this is obvious to most people but not to beginners like me! Sometimes with FIL3 set at 200Hz on a weak signal the sig disappears altogether and the filter just needs widening a bit. Fantastic little radio. Mine gets a real hammering and is faultless. Don't forget the K1! Martin M0KWV K1 #1534 Why not take a look at our Web site? http://www.simoncarves.com * The information in this email and any attachments may contain privileged and/or confidential information intended solely for the use of the individual or entity to whom it is addressed. If the reader of this email is not the intended addressee, or the employee or agent responsible to deliver it to the addressee, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me by telephone or email and delete all copies immediately. * ___ 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: Help me identify this capacitor?
Top of head thoughts, Compulytic = Computer Grade Electrolytic ? 32D - sounds like a type reference ? 4500 - 150 DC = 4500 uF 150V DC ? Strange though as 4700 uF is the usual value and 100V or 200V are the usual nearby voltage ratings. 7230L - maybe the part number ? 0180-1839 - maybe the HP stock number ? My guess is that Sprague supplied these as specials to a HP spec. This sort of thing happened a lot when I was with RCA. 73 and good luck, Geoff. GM4ESD - Original Message - From: Richard T. Perry [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Thursday, January 13, 2005 9:12 PM Subject: [Elecraft] OT: Help me identify this capacitor? Since this list is a font of everything electronic, can y'all help me with this? I've got a HP DC power supply (6443B) that's worked great for a long time. I DON'T have a service manual for it (of course). Recently, when I turn this thing on, the voltage comes up, then drops off slowly (this is under no load conditions) over 20-30 seconds, then blows the C/B. I think I've troubleshot the problem down to the supply side capacitors. They're massive can-types. About 3 in diameter by 6 tall. On the side is the following information: Sprague Compulytic 32D 4500-150 DC 7230 L 0180-1839 ___ 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 Rev A
Hi Folks, I have an unbuilt KPA100 Rev A. I know about the Sheilding modification, the updated firmware and the SWR range modification. Are there any other modifications/upgrades required? Thanks, Julius n2wn ___ 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] receive problem
I set my k2 up two days ago after a long time idle and hooked up an 80 dipole I was tuning around on 80 meters and it sounded dead but when I switched the antenna to my Kenwood ts450 the band came to life. so it appears that my k2 with remote kpa100 and tuner seems to be deaf the last thing I had done to the unit was the shield mod on the kpa 100 did not have a chance to check it out after words so any ideas as to where to begin? see ya 73's N1IB David Schornak K2 03027 arf don't forget me Mis Ginger ___ 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] receive problem
David, You have 3 pieces of Elecraft gear connected together - check to see which one of them creates the problem. First, just move the antenna to the base K2 to see if you can hear there - if so, next move it direct to the KPA100 antenna connector - if you can still hear the signals, the problem is with the KAT100. Once you determine which Elecraft box contains the problem, we can help more. OTOH, if you have the K160RX option installed, be certain Rant is set off on 80 meters. The receive antenna setting is remembered on a per band basis. As a quick check, just connect an antenna to the receiveng antenna jack. 73, Don W3FPR - Original Message - I set my k2 up two days ago after a long time idle and hooked up an 80 dipole I was tuning around on 80 meters and it sounded dead but when I switched the antenna to my Kenwood ts450 the band came to life. so it appears that my k2 with remote kpa100 and tuner seems to be deaf the last thing I had done to the unit was the shield mod on the kpa 100 did not have a chance to check it out after words so any ideas as to where to begin? see ya ___ 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] WTB: KPA-100
Anyone have one for sale, built , or unbuilt? Thanks! John K5MO ___ 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] Elecraft: Amplifier for K1
Martin, could you tell me a bit more about how you interfaced the K1 to the TS520? I have an old Atlas 210 I would like to use as a power amp with my K1 as you are using the TS520. I start writing a how to question and realize I really don't have all the knowledge to even ask the questions. I guess the best thing I can say is - can anyone help me with this project of using the Atlas 210 as an Amp? What are the steps involved? I know there is more to it than just injecting the K1 signal into the Atlas just past the driver stage. I am not trying to save the Atlas for anything else. 73 de Ken K9FV K1 #1951 - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Friday, January 14, 2005 3:13 AM Subject: Re: [Elecraft] Elecraft: Amplifier for K1 Thanks Bob, yes the resistors are metal film or something like that but definitely not wire wound. I spent a fair time on the air last night on 40/80 with the K1 and 100W from the TS520. It works like a charm. The K1 switches the TS520 T/R relays via a little 2 transistor switching circuit (looking at the K1 6R line) which grounds the TS520 PTT line. I built the circuit onto a small piece of vero board which plugs into the 3 pin socket on the filter board (like the official K2 mod) . A screened cable then connects the open collector to the PTT pin on the TS520 Mic socket. I've set the T-R delay to about 500ms so the relays don't switch too much. Do I need to worry about this? If I set it so that it switches say between each word will that wear out the relays too quickly, not sure how robust they are. When operating the K1 barefoot I use a T-R delay of 50ms. Thanks Martin M0KWV [EMAIL PROTECTED] on 13/01/2005 16:58:55 To:[EMAIL PROTECTED] cc: Subject:Re: [Elecraft] Elecraft: Amplifier for K1 Hi Martin, Got that fine. You have got the best of what is possible using the TS520 with the way you have done the mod. Just a point make sure you do not use 2 x100 ohm wire wound resistors for the dummy load. They must be carbon otherwise odd effects can occur due to inductance. You may be well aware of this effect, but I am pointing it out in any case as 2.5W is one of the standard dissapation values for wire wound resistors! Regards, Bob, G3VVT Why not take a look at our Web site? http://www.simoncarves.com * The information in this email and any attachments may contain privileged and/or confidential information intended solely for the use of the individual or entity to whom it is addressed. If the reader of this email is not the intended addressee, or the employee or agent responsible to deliver it to the addressee, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me by telephone or email and delete all copies immediately. * ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Will trade XV144 or XV222 for KAT100
Hi: I will trade a built transverter either the XV144 or XV222 for a new KAT100 kit. The transverters are built and work according to spec. 73 Alan W1HYV ___ 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 IF Amp Alignment and AGC Threshold
I have a couple of questions about readings I have collected during my present build process. First: The procedure outlined for setting the AGC Threshold on page 47 recommends setting the voltage from U2 pin 5 to 3.8 volts by adjusting R-1. In the troubleshooting section Appendix E Page 6, the procedure recommends setting the voltage to 3.9 volts. As I understand it this is a initial adjustment that I will fine tune later and that I am just adjusting for a peak voltage. However the maximum I can adjust my U2 Pin 5 voltage is 3.78. Comments? Second: The IF Amplifier Alignment, outlines a procedure to tune the VFO to 7.000 MHz then with the L34 slug turned down 1 1/2 turns from the top of the can, adjust the L34 for signal peak. I hear a tone at 6,998 MHz and the audible tone is pretty solid for a full one and half turns in either direction on the L34. I hooked up a DMM to the headphone output and the voltage appears to peak at the top of the L34 can. Comments? Third: I remember seeing a posting that discussed a rather elaborate procedure to Calibrate the K2 S-meter using the Elecraft XG1. Or was I dreaming? Can someone point me in the right direction to speed up my search. 73, KI4DGH Chuck G. ___ 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] Questions on battery, pots, chargers, and paddles
Colleagues, I got some great advice from the list from my four questions posted a couple of days ago... I had asked what to do about the dead potentiometer and the response was: MAIL ELECRAFT! I did. They responded immediately that they would send me a replacement pot immediately at no charge. These folks are GREAT! For the rest, here goes. Thank you again everybody for the great ideas, advice, and guidance. It is very much appreciated. (If I missed anybody, please accept my apology!) Don W3FPR: Thank you very much for the helpful advice this time (and last time). I've indeed visited your web site. Very nice. I need to think about this a bit more. (I also need to follow up on the last thing you helped me with: the 12uH inductor.) =-=-= Lonnie NY2LJ: You had observed that the battery is pretty snug in there with the bracket. I must agree. I just got it installed last night. Thanks for the encouragement. I will be shipping it with the battery mounted inside. (I'll also turn it OFF as you suggest!) Other folks commented how well the Pelican case works so I've got few worries about it now. =-=-= WA5ZNU Leigh: Your idea of a DPDT switch is a great one! I'll likely follow up with you upon my return from KH6. Ken (N4SO) had another interesting idea (below). =-=-= Ken N4SO: Thanks for the notes on the charger. I've not decided what to do for this problem long-term. I think, at least for now, I'll wait and solve the problem after returning from KH6. This does look interesting, though: The PCR12-500A is a self contained charger designed to auto- matically maintain a 12 volt Sealed Lead Acid battery having a maximum bulk charge of 500 mA or greater. The Power Sonic PS-1229A is an example of the type of battery this charger is designed to work with. Ref: Bob Lewis, AA4PB, An Automatic Sealed Lead-Acid Battery Charger, QST May 2001, p. 43-47. The advantage of the PCR12-500A over most other automatic chargers is that it can reliably work under varying load conditions and can therefore be left connected to the battery at all times. =-=-= Michael VE3WMB: Thanks for the advice on the paddles and for the note on the Pelican case. It is going to be fun filling it! I still might get the paddles but use them at home. I'll check the budget this evening. :-) -- Scott (NE1RD)... K2 #4649 B. Scott Andersen| Magic is real, unless declared integer. [EMAIL PROTECTED] | -- The collected sayings of Wiz Zumwalt Acton, Massachusetts | Ham: NE1RD, QRP ARCI#11588, FP#-910 ___ 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] EQP pre-announcement
Hi All, A few people have asked about this year's EQP (Elecraft QSO Party). We've tentatively settled on a contest period of 1500 Z March 12 to 1500 Z March 13. Final details will be posted here and on our web site soon. Of course it's impossible to find a weekend that isn't chock-full of contests, so there's an inevitable overlap between EQP and other activities. We tried to do as little damage as possible, but it's not too late to complain loudly and try to convince us to change our minds ;) 73, Wayne N6KR --- 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: re:[Elecraft] Questions on battery, pots, chargers, and paddles
Scott, never ship electronics with a battery installed unless you disconnect one lead from the battery so that there is not way it can energize in shipment. DO NOT RELY ON ANY!! SWITCH! We have shipped equipment all over the world and seen it accidentally turn itself on through vibration or switches that short, or take a blow and get broken. You can never predict what a unit may endure in shipping. It only takes a moment to remove the covers of the K2 and reconnect a battery lead. Safety first! -Stuart K5KVH ___ 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] Questions on battery, pots, chargers, and paddles
Stuart: You are absolutely right. I've already had one interesting battery incident (not with the K2 or the K2 battery) and that was more than enough for one lifetime! Thanks for the note. I'll get that battery disconnected and the terminals insulated before the trip. -- Scott (NE1RD) On Jan 14, 2005, at 2:57 PM, Stuart Rohre wrote: Scott, never ship electronics with a battery installed unless you disconnect one lead from the battery so that there is not way it can energize in shipment. DO NOT RELY ON ANY!! SWITCH! We have shipped equipment all over the world and seen it accidentally turn itself on through vibration or switches that short, or take a blow and get broken. You can never predict what a unit may endure in shipping. It only takes a moment to remove the covers of the K2 and reconnect a battery lead. Safety first! -Stuart K5KVH B. Scott Andersen| Magic is real, unless declared integer. [EMAIL PROTECTED] | -- The collected sayings of Wiz Zumwalt Acton, Massachusetts | Ham: NE1RD, QRP ARCI#11588, FP#-910 ___ 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] SMD CW Tuning Indicator
Hello everyone. Just to add my thanks along with many and say thanks again to Tom for a nicely done kit. This was my first venture into SMD and the hand holding provided by the instructions made it painless. Small kits in this realm is the way for me. I couldn't envision all the small parts for a K2 laying around here. As has been suggested around here I started by putting all the parts into a pie plate. Use a wooden clothes pin as a based to hold the pc board. Then I cut up a wire coat hanger and use the hook end together with a tooth pick to keep the small thingys in place. Used a program called TuneWin to help me with the adjustment and double sticky taped the board as described. Here are some picture of my adventure. http://pages.sbcglobal.net/n2fq/spotIndicator.html I should have gotten another one for my 703 :-( Thanks to the reflector and those who are in the know. take care. -- 73 Fernando N2FQ/NNNØJYM San Jose, CA http://pages.sbcglobal.net/n2fq ___ 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] 24 Hours left to purchase a 2005 QRP Contest Calendar
Hello, Just a quick note. There is only 24 hours before I close out the 2005 QRP Contest Calendar. 15 Jan. 2005 @ 23:59 UTC is the last time to purchase a 2005 QRP Contest Calendar. If you would like to pay by check, please let me know via an e-mail. Check out: www.n3epa.org Click on: 6th Annual QRP Contest Calendar for 2005 Thanks to all that did purchase a calendar. 72 Ron de N3EPA EPA QRP Club El Presidente' [EMAIL PROTECTED] www.n3epa.org ___ 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 IF Amp Alignment and AGC Threshold
Hello Chuck, I also never saw much change on the DMM, but the L34 peak was close to the top. Later, I used the Spectrogram program. The peak still didn't change much, but the background noise spectrum does change. Much of the high frequency noise goes away as the slug is turned down, so I know that the setting should not be too near the top. I haven't figured out a good way to center the band pass around the signal though, because the audio from the low side of the IF filter bandwidth gets lost in the low frequency audio cut off frequency. Second: The IF Amplifier Alignment, outlines a procedure to tune the VFO to 7.000 MHz then with the L34 slug turned down 1 1/2 turns from the top of the can, adjust the L34 for signal peak. I hear a tone at 6,998 MHz and the audible tone is pretty solid for a full one and half turns in either direction on the L34. I hooked up a DMM to the headphone output and the voltage appears to peak at the top of the L34 can. Comments? 73 de AB9GV ___ 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] N2CQ QRP Contest Calendar Jan 14 - Feb 28, 2005
~~ N2CQ QRP CALENDAR JANUARY 14 to Feb 28, 2005 ~~ 40 METER FOXHUNT - Every Friday 0200z to 0359z (Thurs 9 PM to 11 PM EST) Info: http://www.cqc.org/fox/index.htm Truffle Hunt - 30 min before Fox Hunt Info: http://fpqrp.com/winter_hunt.html ~~ 070 Club PSKFEST Contest ... QRP Category Jan 15, z to 2400z Rules: http://www.podxs.com/html/pskfest.html ~~ Michigan QRP Club Contest (CW) ... QRP Contest! Jan 15, 1200z to Jan 16, 2359z Rules: http://www.qsl.net/miqrpclub/contest.html ~~ LZ OPEN CONTEST (CW 80M/40M) ...QRP Category Jan 15, 1200z to 2000z Rules: http://www.qsl.net/lz1fw/lzopen/index.html ~~ North American QSO Party (SSB) (100w max. QRP Entries Noted) Jan 15, 1800z to Jan 16, 0600z Rules: http://www.ncjweb.com/naqprules.php ~~ Run For The Bacon (CW) *** QRP Contest *** Jan 17, 0100z to 0300z Rules: http://fpqrp.com ~~ NAQCC 80-METER SPRINT (CW) *** QRP Contest *** Jan 21, 0130z to 0330z Rules: http://www.qsl.net/kb3lfc/sprint_0105.html ~~ ARRL January VHF Sweepstakes ... Low Power Category Jan 22, 1900z to Jan 24, 0400z Rules: http://www.arrl.org/contests/calendar.html?year=2005 ~~ CQ WW 160-Meter DX Contest (CW) ... QRP Category Jan 29, z to Jan 30, 2359z Rules: http://www.cq-amateur-radio.com/awards.html ~~ UBA DX Contest (Belgian) (SSB) ... QRP Category Jan 29, 1300z to Jan 30, 1300z Rules: http://www.sk3bg.se/contest/ubac.htm ~~ New Hampshire QSO Party (Ph/CW/Dig) ... QRP Category Feb 5, z to Feb 6, 2400z Rules: http://www.wz1f.net/2005_NH_QSO_Pary_Rules.doc ~~ 10-10 Int. Winter Phone QSO Party ... QRP Category Feb 5, 0001z to Feb 6, 2359z Rules: http://www.ten-ten.org/rules.html ~~ Minnesota QSO Party (PH/CW) ... QRP Category Feb 5, 1400z to 2400z Rules: http://www.w0aa.org/ ~~ FBYO Winter QRP Field Day (CW/SSB) ... QRP Contest! Feb 5, 1600z to 2400z Rules: http://www.azqrp.org/azqrp/FYBO2005.htm ~~ AGCW Straight Key QSO Party (CW 80M) ... QRP Category Feb 5, 1600z to 1900z Rules: http://www.agcw.de/english/contest/htp_e.htm ~~ Delaware QSO Party (All) Feb 5, 1700z to Feb 6, 0500z Feb 6, 1300z to Feb 7, 0100z Rules: http://www.fsarc.org/qso.htm ~~ North American Sprint (Phone) ... QRP Category Feb 6, z to 0400z Rules: http://www.ncjweb.com/sprintrules.php ~~ QRP ARCI Fireside Sprint (SSB) ...QRP Contest! Feb 6, 2000z to 2400z Rules: http://2hams.net/ARCI/index.htm ~~ Adventure Radio Society - Spartan Sprint (CW) ... QRP Contest! Feb 8, 0200z to 0400z (First Monday 9 PM EST) Rules: http://www.arsqrp.com/ ~~ CQ WW RTTY WPX Contest ... Low Power Category Feb 12, z to Feb 13, 2400z Rules: http://www.cq-amateur-radio.com/awards.html ~~ Dutch PACC Contest (SSB/CW) ... QRP Category Feb 12, 1200z to Feb 13, 1200z Rules: http://www.veron.nl/pacc/rules2005.html ~~ Louisiana QSO Party (Ph/CW) Feb 12, 1500z to Feb 13, 0300z Rules: http://www.tchams.org/users/contest/laqp/laqprules.html ~~ FISTS Winter Sprint (CW of course) ...QRP Category Feb 12, 1700z to 2100z Rules: http://www.fists.org/sprints.html ~~ British Columbia QSO Challenge (CW/Ph/Dig) ... QRP Category Feb 12, 1800z to Feb 13, 1800z Rules: http://www.deltaamateurradio.com/bcqsochallenge.html ~~ North American Sprint (CW) ... QRP Category Feb 13, z to 0400z Rules: http://www.ncjweb.com/sprintrules.php ~~ ARRL
RE: [Elecraft] K2 IF Amp Alignment and AGC Threshold
Rather than using a DMM, while you have the rig hooked up to the PC (Speaker jack NOT Phone jack) and using Spectrogram, follow the steps for the IF Amplifier alignment - BUT look for the least amount of noise and a peak in the signal. If you don't have Spectrogram, use any PSK program with a waterfall display and minimize the background clutter (like snow on a TV) and maximize the brightness of the tone. Works great and much easier. Made a tremendous difference on my rig. I think if people that complained of Low output volume there problems would go away. Rich, KE0X ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KPA100 - 80m poor quality SSB
You must have looked at a different errata sheet than I have. Item 3 talks about RFC3 and the resistor across it. The sheet is dated 12/14/2004 Stan Rife W5EWA Houston, TX K2 S/N 4216 Thanks for the information Sverre. Unfortunately:- a) The Errata is under the manual section, with no reference to it from the builders notes or elsewhere as far as I can see. b) The description in the Errata only mentions the changes to the KPA100 SWR foldback, nothing about curing the RFC3 resonance on 80m. I think that this is where your excellent index of modification takes over. 73 Stewart G3RXQ ___ 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] SMD CW Tuning Indicator
FB Job Fernando! Good Pics too! I am waiting on my kit, so your work was very helpful. Tnx et 73 de Dave K9FZJ ___ 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] Logging clock?
A few of you mentioned the desire for larger digits on your logging clock. Here is just the thing for you ;) http://www.lares.dti.ne.jp/~yugo/storage/monocrafts_ver3/03/index.html Kevin. KD5ONS -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.12 - Release Date: 1/14/2005 ___ 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 IF Amp Alignment and AGC Threshold
Chuck, The AGC Threshold setting of 3.8 volts is the normal recommended starting value. If you are measuring 3.78 volts, thatt is likely OK, but just as a quick sanity check, do check the output of the 8 volt regulator U4 on the control board. If it is less than 8 volts, that may be the reason you cannot get the AGC Threshold up to the 3.8 volt level - check the soldering on the 8A line (refer to the schematic to see the points connected). In any case, you can modify the AGC Threshold after you have the K2 up and running to achieve maximum receiver sensitivity - simply switch between AGC on and AGC off on a quiet band - the AGC Threshold should be set so there is no reduction in receiver gain with AGC on. I usually find that the final AGC Threshold voltage is somewhere between 3.6 and 3.8 volts. You have received several other responses about the IF alignment question - I can add nothing more. In answer to your 3rd question about the S-Meter calibration - Yes, one can use the Elecraft XG1 (or any other 50 uV signal) to set the S-Meter at S-9. The easy way to do that is just what is mentioned in the manual - change S HI so the S-meter reads the way you want it to, but if you also insist on full S-meter deflection with a VERY strong signal, things get a bit more complex. The settings of S-Lo, S-Hi, and the AGC Threshold all interact and can be set to provide whatever S-meter action is pleasing to you - so if you are adventure minded, I encourage you to experiment with it until you have the settings you desire - If you are not so adventuresome and just 'want it to work', do what the manual tells you to do - that will result in a perfectly adequate S-meter response. 73, Don W3FPR - Original Message - I have a couple of questions about readings I have collected during my present build process. First: The procedure outlined for setting the AGC Threshold on page 47 recommends setting the voltage from U2 pin 5 to 3.8 volts by adjusting R-1. In the troubleshooting section Appendix E Page 6, the procedure recommends setting the voltage to 3.9 volts. As I understand it this is a initial adjustment that I will fine tune later and that I am just adjusting for a peak voltage. However the maximum I can adjust my U2 Pin 5 voltage is 3.78. Comments? Second: The IF Amplifier Alignment, outlines a procedure to tune the VFO to 7.000 MHz then with the L34 slug turned down 1 1/2 turns from the top of the can, adjust the L34 for signal peak. I hear a tone at 6,998 MHz and the audible tone is pretty solid for a full one and half turns in either direction on the L34. I hooked up a DMM to the headphone output and the voltage appears to peak at the top of the L34 can. Comments? Third: I remember seeing a posting that discussed a rather elaborate procedure to Calibrate the K2 S-meter using the Elecraft XG1. Or was I dreaming? Can someone point me in the right direction to speed up my search. 73, KI4DGH Chuck G. ___ 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] Operating in cold weather
Hello Elecrafters, I have a little problem and would appreciate some advice. My ham shack is in a room which is separated from the main house. Consequently, it does not receive heat from the main house and during this cold weather is only heated when I am in the room and even then I don't get it very warm. I normally only have an hour or so in the evenings for operating. I dress warm, and, fortunately I'm in Alabama where winters are relatively mild. Well I have almost completed construction of the KPA100 and planned to power it with an Alinco switching supply. I was using this supply with my K2 on a cold morning recently and almost as soon as I powered up it notified me my battery was low (not on battery). I looked at the Alinco's meter and the voltage was showing just over 10V when it should have been 13.8. First question: Am I correct in attributing this drop in voltage to the cold? I think it was about 45 degrees in the room at that time. I also have an Astron RS-20 which did not show a similar voltage drop, leading me to this conclusion. I can use the Astron to power the KPA100 but will need another supply for the K2. Second question: Can someone suggest a smaller supply to use with the K2 which will not suffer in the cold (most of the small ones seem to be switchers)? Or, final question, Is it really necessary to use separate supplies for the K2 and KPA or could/would the Astron power both. Thanks in advance for any assistance. Joe K4NVJ K2#4155 K1#764 LONG LIVE ELECRAFT' ___ 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] Operating in cold weather
On Fri, Jan 14, 2005 at 08:57:08PM -0600, Joe Ford wrote: Hello Elecrafters, I have a little problem and would appreciate some advice. My ham shack is in a room which is separated from the main house. Consequently, it does not receive heat from the main house and during this cold weather is only heated when I am in the room and even then I don't get it very warm. I normally only have an hour or so in the evenings for operating. I dress warm, and, fortunately I'm in Alabama where winters are relatively mild. Well I have almost completed construction of the KPA100 and planned to power it with an Alinco switching supply. I was using this supply with my K2 on a cold morning recently and almost as soon as I powered up it notified me my battery was low (not on battery). I looked at the Alinco's meter and the voltage was showing just over 10V when it should have been 13.8. First question: Am I correct in attributing this drop in voltage to the cold? I think it was about 45 degrees in the room at that time. I also have an Astron RS-20 which did not show a similar voltage drop, leading me to this conclusion. I can use the Astron to power the KPA100 but will need another supply for the K2. Second question: Can someone suggest a smaller supply to use with the K2 which will not suffer in the cold (most of the small ones seem to be switchers)? Or, final question, Is it really necessary to use separate supplies for the K2 and KPA or could/would the Astron power both. Thanks in advance for any assistance. My shack is in my unheated garage, which often gets to 50F this time of year. I use an Alinco supply for my K2, TS-570 (not at the same time) and packet station and have never had any problems with the voltage being temperature sensitive. I keep the voltage control on the detent. Bob, N7XY ___ 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] Operating in cold weather
Joe, Use the Astron since you said it does not sag voltage with the cold - it will supply both the base K2 and the KPA100. Connect it only to the APP connector on the KPA100 and all will be well (you do not need seaprate supplies for the K2 and the KPA100 unless you have the KPA100 mounted in an external enclosure without the DC connection to the K2 RF board). 73, Don W3FPR - Original Message - From: Joe Ford [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, January 14, 2005 9:57 PM Subject: [Elecraft] Operating in cold weather Hello Elecrafters, I have a little problem and would appreciate some advice. My ham shack is in a room which is separated from the main house. Consequently, it does not receive heat from the main house and during this cold weather is only heated when I am in the room and even then I don't get it very warm. I normally only have an hour or so in the evenings for operating. I dress warm, and, fortunately I'm in Alabama where winters are relatively mild. Well I have almost completed construction of the KPA100 and planned to power it with an Alinco switching supply. I was using this supply with my K2 on a cold morning recently and almost as soon as I powered up it notified me my battery was low (not on battery). I looked at the Alinco's meter and the voltage was showing just over 10V when it should have been 13.8. First question: Am I correct in attributing this drop in voltage to the cold? I think it was about 45 degrees in the room at that time. I also have an Astron RS-20 which did not show a similar voltage drop, leading me to this conclusion. I can use the Astron to power the KPA100 but will need another supply for the K2. Second question: Can someone suggest a smaller supply to use with the K2 which will not suffer in the cold (most of the small ones seem to be switchers)? Or, final question, Is it really necessary to use separate supplies for the K2 and KPA or could/would the Astron power both. Thanks in advance for any assistance. Joe K4NVJ K2#4155 K1#764 LONG LIVE ELECRAFT' ___ 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] receive problem
the problem is not in the k2 it checked out okay the kat 100 seems to be acting really strange with the leds lighting some sometimes as it tunes and sometimes it does not and it was cycling through and never really tuning so I think the problem is in the kat100 which is in the same box as the kpa 100 so I will start the diagnosis of that on Saturday. - Original Message - From: Gary Surrency [EMAIL PROTECTED] To: 'W3FPR - Don Wilhelm' [EMAIL PROTECTED]; 'David' [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Friday, January 14, 2005 1:17 PM Subject: RE: [Elecraft] receive problem Also check all of your cables for faults. -- 73, Gary AB7MY = [EMAIL PROTECTED] Elecraft Technical Support -Original Message- From: W3FPR - Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Friday, January 14, 2005 6:56 AM To: David; elecraft@mailman.qth.net Cc: [EMAIL PROTECTED] Subject: Re: [Elecraft] receive problem David, You have 3 pieces of Elecraft gear connected together - check to see which one of them creates the problem. First, just move the antenna to the base K2 to see if you can hear there - if so, next move it direct to the KPA100 antenna connector - if you can still hear the signals, the problem is with the KAT100. Once you determine which Elecraft box contains the problem, we can help more. OTOH, if you have the K160RX option installed, be certain Rant is set off on 80 meters. The receive antenna setting is remembered on a per band basis. As a quick check, just connect an antenna to the receiveng antenna jack. 73, Don W3FPR - Original Message - I set my k2 up two days ago after a long time idle and hooked up an 80 dipole I was tuning around on 80 meters and it sounded dead but when I switched the antenna to my Kenwood ts450 the band came to life. so it appears that my k2 with remote kpa100 and tuner seems to be deaf the last thing I had done to the unit was the shield mod on the kpa 100 did not have a chance to check it out after words so any ideas as to where to begin? see ya -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.302 / Virus Database: 265.6.12 - Release Date: 1/14/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.302 / Virus Database: 265.6.12 - Release Date: 1/14/2005 ___ 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] Logging clock?
Wow, wouldn't that drive you nuts? -- John K7SVV - Original Message - From: Kevin Rock [EMAIL PROTECTED] To: Elecraft elecraft@mailman.qth.net Sent: Friday, January 14, 2005 6:44 PM Subject: [Elecraft] Logging clock? A few of you mentioned the desire for larger digits on your logging clock. Here is just the thing for you ;) http://www.lares.dti.ne.jp/~yugo/storage/monocrafts_ver3/03/index.html Kevin. KD5ONS -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.12 - Release Date: 1/14/2005 ___ 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 -- Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 ___ 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]V9#14-OT: Help me identify this capacitor?
At 04:01 AM 1/14/05 -0500, [EMAIL PROTECTED] juggled the keys to produce... Since this list is a font of everything electronic, can y'all help me with this? I've got a HP DC power supply (6443B) that's worked great for a long time. I DON'T have a service manual for it (of course). Recently, when I turn this thing on, the voltage comes up, then drops off slowly (this is under no load conditions) over 20-30 seconds, then blows the C/B. I think I've troubleshot the problem down to the supply side capacitors. They're massive can-types. About 3 in diameter by 6 tall. On the side is the following information: Sprague Compulytic 32D 4500-150 DC 7230 L 0180-1839 I know Sprague has merged several times, but I've been trying to get some information about this part from my normal suppliers (Mouser, Digikey) with no luck... Rather than buying the manual for $35, can someone out there help me decode this part number? I figure if I can find the original capacitance and voltage/load ratings, I can just find a more modern replacement. Thanks in advance for the help, guys. Richard Perry There's also an operating/service manual available on ebaY for $14.95 Buy-it-Now, if you care to have things like detailed calibration procedure, etc. You may also wish to join/post to a couple YahooGroups, nomanual and Manual Exchange I'm always a bit nervous about a piece of gear that comes without the manual - especially, say, a built Heathkit. I'm at the mercy of someone else's building skills then. But for a capacitor substitution like this, you can probably find what you need at a distributor, Digi-Key, Mouser, Newark, Allied, etc. Some of them may be able to let you search for a sub, within the physical envelope of the original. Before you mount the thing permanently, try just disconnecting and bridging in the sub. There could be other things failed. Be careful; you are in lethal country there! 73, Phil Barnes-Roberts WA6DZS DM04we | Mailto:wa6dzs at arrl dot net The only Dumb Question is the one you Didn't Ask because you thought it would Sound Dumb. --AQF1 Jones ___ 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
