[Elecraft] A miracle or am I getting old??? I need help!
Good morning friends An elder friend om mine got his new K2 ready a couple of days ago, it worked fantastic. After some playing with the menues a miracle appeared: The receiver does not receive, in CW mode the mode indicator changes from c to F every 2-3 seconds. NO, it´s not the r for rtty plus the bar for CW reverse, it´s a complete F I am pretty sure I never have seen before this flashing Fm I traced the manual to find everything with the word flash in it - no success. The K2 is a CW only machine, extra Modules are AF Filter and RS232 Any Idea?? 73 de Peter, DL2FI ___ 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 miracle or am I getting old??? Problem solved (at least partially)
Good morning friends The elder friend did some more playing with the menue and he found the fault: D19 was set to Y(es) After switching to n, the Receieiver started receiving signals again and the flashing F disappeared. So far so good. I just set my own K2 to D19 Y. No flashing F :-((( However, his K2 is running, he is happy 73 de Peter, DL2FI ___ 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: A miracle or am I getting old??? Problem solved (at least partially)
So far so good. I just set my own K2 to D19 Y. No flashing F :-((( Hi Peter, The flashing 'F' indicates that fast play mode is in effect, which allows you to use a subset of the keypad switches as one-touch CW message buttons. The particular subset of switches used is set up in the FPLY menu entry (secondary menu), and to turn it on/off you have to assign one of the special-function switches to it. This is covered in the manual. 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
[Elecraft] Elmer
Seems to me the word Elmer is a stateside only thing, we never used it in the UK or here in Australia. To me it conjures up images of Bugs Bunny and Elmer Fudd ! I prefer to tell folks I'm a radio hobbyist, experimenting in technology and communications. That usually leaves then gobsmacked ! 73 Keith -- Keith Bainbridge VK6XH VK6DXR Secretary NCRG. Skype keithxh http:/www.qrz.com/vk6xh ___ 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: July 2007
~ N2CQ QRP CONTEST CALENDAR July 2007 ~ Summer FOX Hunt - QRP 20M CW UTC: Every Fri Begining July 6 thru Sept 7, 0100z to 0229z EDT: Every Thur Begining July 5 thru Sept 6, 9 PM to 1029 PM Info: http://www.qrpfoxhunt.org/ ~ RAC Canada Day Contest (CW/SSB) ... QRP Category Jul 1, z to 2359z Rules: http://www.rac.ca/service/infocont.htm ~ Adventure Radio Spartan Sprint (CW) ... QRP Contest! Jul 3, 0100z to 0300z(First Monday 9 PM EDT) Rules: http://www.arsqrp.com/ ~ MI QRP Fourth of July Sprint (CW) ... QRP Contest! Jul 4, 2300z to Jul 5, 0300z Rules: http://www.qsl.net/miqrpclub/contest.html ~ VK/trans-Tasman Contests (160m Ph) ... QRP Category Jul 7, 0800z to 1400z Rules: http://home.primus.com.au/vktasman/ ~ Original QRP Contest (CW) ... QRP Contest! Jul 7, 1500z to Jul 8, 1500z Rules: http://www.qrpcc.de/contestrules/oqrpr.html ~ QRP ARCI Summer Homebrew Sprint (CW) ... QRP Contest! Jul 8, 2000z to 2400z Rules: http://www.qrparci.org ~ SKCC Sprint (Straight Key CW) ... QRP Awards UTC: Jul 11, z to 0200z EDT: Jul 10, 8 PM to 10PM Rules: http://skccgroup.com/sprint/sprint-rules.htm ~ IARU HF World Championship (CW/SSB) ... QRP Category Jul 14, 1200z to Jul 15, 1200z Rules: http://www.arrl.org/contests/calendar.html?year=2007 ~ FISTS Summer Sprint (CW) ... QRP Category Jul 14, 1700z to 2100z Rules: http://www.fists.org/sprints.html ~ Colorado QSO Party (SSB/CW/Digital) ... QRP Category Jul 15, 1200z to Jul 16, 0400z Rules: http://www.ppraa.org/coqp/ ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EDT: Jul 15, 9 PM to 11 PM UTC: Jul 16, 0100z 0300z Rules: http://www.gentzow.com/fpqrp/ ~ NAQCC Straight Key/Bug Sprint *** QRP CONTEST! *** EDT: Jul 18, 8:30 PM to 10:30 PM UTC: Jul 19, 0030z to 0230z Rules: http://www.arm-tek.net/~yoel/contests.html ~ VK/trans-Tasman Contests (160m CW) ... QRP Category Jul 21, 0800z to 1300z Rules: http://home.primus.com.au/vktasman/ ~ North American QSO Party (RTTY) /QRP Entries Noted Jul 21, 1800Z to Jul 22, 0600Z Rules: http://www.ncjweb.com/naqprules.php ~ CQ WW VHF Contest (All, 6 2 Meters) ... QRP (10W) Category Jul 21, 1800z to Jul 22, 2100z Rules: http://www.cq-amateur-radio.com/awards.html ~ SKCC Weekend Sprint (Straight Key CW) ... QRP Category Jul 22, z to 2359z (Your choice of 4 continuous hours) Rules: http://www.iglou.com/sonic//skcc/wknd-sprint-rules.html ~ RSGB Low Power Field Day (CW) ...QRP Contest! Jul 22, 0900z to 1200z Jul 22, 1300z to 1600z ~ Colorado Gold Rush (20 mtr CW QRP) ... QRP Contest July 22, 2000z to 2200z Rules: http://www.cqc.org/contests/ ~ Islands On The Air Contest (CW/SSB) ... QRP Category Jul 28, 1200z to Jul 29, 1200z Rules: http://www.contesting.co.uk/hfcc/calendar07.shtml ~ Flight of the Bumblebees (CW) ... QRP Contest! EDT: Jul 30, 1300 to 1700 UTC: Jul 30, 1700z to 2100z Rules: http://www.arsqrp.com/ ~ Thanks to SM3CER, WA7BNM, N0AX(ARRL) and others for assistance in compiling this calendar. If you wish to subscribe to the Calendar, send an e-mail to [EMAIL PROTECTED] Please foreward the contest info you sponsor to [EMAIL PROTECTED] and we will post it and give it more publicity. Anyone may use this N2CQ QRP Contest Calendar for your website, newsletter, e-mail list or other media as you choose. (Include a credit to the source of this material of course.) 72 de Ken Newman - N2CQ http://www.amqrp.org/contesting/contesting.html http://www.n3epa.org/Pages/Contest/contest.htm ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info
Re: [Elecraft] Elmer
On Thu, 28 Jun 2007, Keith Bainbridge wrote: Seems to me the word Elmer is a stateside only thing, we never used it in the UK or here in Australia. communications. That usually leaves then gobsmacked ! Seems to me that gobsmacked is not a term that is heavily used here in the coloniesgoes it have anything to do with tea leaves, or conscripted sailors? Thom,EIEIO k3hrn Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ 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] Elmer background info
Some years ago a grateful ham wrote a warm fuzzy magazine article in one of the US Amateur radio magazines (QST?) thanking the man who had been his mentor into the hobby. The man's name was Elmer. 73! Ken Kopp - K0PP [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] Elmer background info
Yep. It's a very recent term as Ham-speak goes, originating in QST in 1971 according to this source: http://www.arrl.org/FandES/field/club/mentor/ Ron AC7AC -Original Message- Some years ago a grateful ham wrote a warm fuzzy magazine article in one of the US Amateur radio magazines (QST?) thanking the man who had been his mentor into the hobby. The man's name was Elmer. 73! Ken Kopp - K0PP [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
[Elecraft] Another question about L34 adjustment IF Amp.
After reading another post about adjusting L34 for the IF amplifier, I have another question. I've wondered about this since completing my K2. The manual was a bit confusing and from what I can remember, it said to adjust L34 for the strongest signal and lowest background noise. It also said that a DMM could be used across the speaker output to get a more accurate reading. Well, my question at the time was how can you get the strongest signal and lowest background noise with only one adjustment. So, I figured it would be a compromise between the two. I adjusted L34 but, not exactly to it's highest volume or loudest signal. Now I've learned that it should be adjusted for the loudest signal and that includes the background noise. So, can I now go back and readjust L34 for maximum volume and if so what else will I have to align? I assume that I would only have to re-calibrate the bar-graph, is that correct? Thanks, Gary, N7HTS ___ 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] Another question about L34 adjustment IF Amp.
Gary, That is correct, CAL S Lo and CAL S Hi may have to be adjusted a small amount, but no other adjustments should be necessary. 73, Don W3FPR Gary D Krause wrote: Now I've learned that it should be adjusted for the loudest signal and that includes the background noise. So, can I now go back and readjust L34 for maximum volume and if so what else will I have to align? I assume that I would only have to re-calibrate the bar-graph, is that correct? ___ 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] Re: A miracle or am I getting old??? Problem solved (at least partially)
On 6/28/07, wayne burdick [EMAIL PROTECTED] wrote: Hi Peter, The flashing 'F' indicates that fast play mode is in effect, which allows you to use a subset of the keypad switches as one-touch CW message buttons. The particular subset of switches used is set up in the FPLY menu entry (secondary menu), and to turn it on/off you have to assign one of the special-function switches to it. This is covered in the manual. I've had a K2 nearly 8 years and there's stuff it can do I never realised (or just forgot). I AM getting too old! I reckon my K3 is going to be the most intelligent thing in my shack. 73, -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? www.Ham-Directory.com: the best ham resources on the net ___ 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] Elmer
On 6/28/07, Thom LaCosta [EMAIL PROTECTED] wrote: Seems to me that gobsmacked is not a term that is heavily used here in the coloniesgoes it have anything to do with tea leaves, or conscripted sailors? Nope. It means you're left feeling astonished like you've just been smacked in the gob (translation: punched in the mouth.) After an Aussie has downed a few tinnies (had a few beers) he often feels like smacking people in the gob, allegedly. :) 73, -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? www.Ham-Directory.com: the best ham resources on the net ___ 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] Another question about L34 adjustment IF Amp.
Hi Gary: There's a tuning point, just below the point on L34 where you DO achieve max. received signal, where the background noise will drop off faster than the received signal. It's (if I recall) about 1/2 to 1 full turn DOWN from the point of max RX sig. If you have Spectrogram installed, you can actually see it on the spectral display... it's NOT a terribly dramatic effect, but it is observable... you WILL lose a bit of received signal strength, BUT it's more than compensated for by the fact that the signal-to-noise ratio has been improved, so to signal seems to 'stand out' a bit better, even though it may be a couple dB lower in level. 73, Tom HammondN0SS At 10:33 06/28/2007, Gary D Krause wrote: After reading another post about adjusting L34 for the IF amplifier, I have another question. I've wondered about this since completing my K2. The manual was a bit confusing and from what I can remember, it said to adjust L34 for the strongest signal and lowest background noise. It also said that a DMM could be used across the speaker output to get a more accurate reading. Well, my question at the time was how can you get the strongest signal and lowest background noise with only one adjustment. So, I figured it would be a compromise between the two. I adjusted L34 but, not exactly to it's highest volume or loudest signal. Now I've learned that it should be adjusted for the loudest signal and that includes the background noise. So, can I now go back and readjust L34 for maximum volume and if so what else will I have to align? I assume that I would only have to re-calibrate the bar-graph, is that correct? Thanks, Gary, N7HTS ___ 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] AF1 Active Filter
Does anyone have this filter and if so, what are your impressions of it? I need a good audio filter especially when listening to SSB. The pitch of the noise is fatiguing to me. I don't want to install the internal audio filter since I will be using this with other rigs. Thanks, Gary, N7HTS ___ 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] Elmer
Ron wrote: Yep. It's a very recent term as Ham-speak goes, originating in QST in 1971 Heck, being 1971-era, it's surprising that guy's name wasn't Moon Unit or Peace Head or Gossamer Lollipop or some such thing. Mike / KK5F ___ 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] Swapping Standard 2.7 kHz 5-pole Filter
According to Monica at Elecraft, it's possible to swap the standard 2.7 kHz 5-pole filter for either the 2.8 kHz 8-pole or the 400 Hz 8-pole for an incremental $90 ($30 credit plus the standard $120 charge for 8-pole filters), but only the 2.8 kHz and 400 Hz may be substituted for the standard filter. Now if we only knew if there were any difference in IMD/BDR performance we could make a rational decision... 73, Bill W4ZV ___ 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[2]: [Elecraft] K3 Questions
David. let me pose a question: if you converted the digitized voice signal to mp3 or ogg format, is this similar to (or the same as) a freq domain data stream? The data compression from CD wav file to mp3 is around 10 to 1; you are certainly not storing a digital copy of the sound wave. Voice compression may not be so good but still should result in the need to transfer considerably less data in order to assure a useful voice recovery on the receiving end. Mike W5FTD Stuart Rohre wrote: In the basics of digitizing the signal you have to clock the conversion at least twice the highest frequency you want to reproduce in the voice (or audio) signal. That's only at the input to the encoding chain (and technically it is twice the bandwidth, not twice the highest frequency). However, I would imagine all digital modes that would be used for communications, rather than broadcasting (and for that matter, also those used in modern broadcasting systems) don't send time domain data. One way or another they send frequency domain data, often in the form of just the formant frequencies used in a model of vocal tract resonances. The critical rate for these systems is the syllable rate, not the frequency of the highest component. I seem to remember that the military were using 2400 bits per second codecs maybe a couple of decades ago.I suspect that was partly do do with how fast they could encrypt. Mobile phone codecs tend to be vocal tract model based, although they use more than 2400 bps so that the voice sounds reasonably natural (but try them on modem tones or even music!). To get much better than 2400 bps, I think you would probably have to recognize phonemes, which is basically the continuous speech voice recognition problem. I think that might get you down to about 300 bits per second. ___ 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] WA3WSJ: K6XX Visual CW Kits Gone!
Hello all, Boy, all my spare K6XX Visual CW Indicator Kits are gone! If anyone wants one of these really neat little kits, send an email to the EPA QRP Club as they will take over selling these kits! Yes, I put one in my K1 then my K2 and now in my KX1 and all work great. All you do is tune onto a station until you see the LED flashing to the CW. That's it no zero beating or messing around. You will be within +- 20hz of the cw station! Give the EPA QRP Club a week or so before they offer these little nifty SMD kits. This is a great kit to build as a start into SMT Technology! Remember you can mount this kit in any CW rig as all it takes is power and audio. For now you can still check it out on my website, but I took off all the PayPal links. Look for the EPA QRP Club to offer these kits soon. http://www.wa3wsj.com http://www.n3epa.org 72, Ed,WA3WSJ 73, Ed,WA3WSJ ___ 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] K3 Questions
Corboy-Poteet wrote: David. let me pose a question: if you converted the digitized voice signal to mp3 or ogg format, is this similar to (or the same as) a I don't know the fine details of ogg, but mp3 is certainly frequency domain, and I think ogg will be the same. mp3 is fairly complicated, and designed for music, which is more demanding that speech. It basically works by noting that the ear cannot detect weak sounds close in frequency to strong ones (the K2 is a bad ear!) and therefore doesn't bother encoding those weak frequencies, but in the end, everything is coded as the spectrum not the time domain signal. (This is very simplified, because I cannot remember the fine details). freq domain data stream? The data compression from CD wav file to mp3 is around 10 to 1; you are certainly not storing a digital copy of the Actually, that's the compression used to try and match CD quality. For speech, you can get away with about 16kbs (good enough for mono language practice; if I remember correctly, the codec will go down to 8kbps). -- David Woolley Emails are not formal business letters, whatever businesses may want. RFC1855 says there should be an address here, but, in a world of spam, that is no longer good advice, as archive address hiding may not work. ___ 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 4922] IF Amplifier Alignment
David, Jack Smith has characterized the K2 AGC curves (along with some other rigs) and you may find some useful information on his website: http://www.cliftonlaboratories.com/receiver_agc_curves.htm The IF AMP AGC input is really current driven, so trying to obtain a direct relationship between the voltage and the AGC action is problematic at best - yes, I know the data sheet expresses the AGC voltage in the curves, but that is based on the operating conditions stated in the data sheet. When you set up the AGC Threshold voltage in the K2 to 3.8 volts, you are not reading the voltage into the MC1350, but rather reading an indirect control point voltage - the actual AGC drive to the MC1350 is two active devices 'down the road' from where the AGC Threshold is set. What I can say for certain is that I have had to re-visit the AGC Threshold and S-meter settings after completing assembly of any K2 that I have built or repaired (I have built many and repaired many more) - for instance, the filter passband alignment will influence the S-meter response, so the S-meter should best be set after the final filter alignment. True, the manual does not explicitly state that one should re-adjust the S-meter settings after all the other alignment is done, but it does hint at it. One can 'play' with the AGC Threshold voltage setting to achieve better receive sensitivity with no input signal, but move it very far below 3.8 volts and the S-meter settings and response gets 'squirrelly', so if you choose to do that, plan on a lot of interactive 'playing' with the AGC Threshold, CAL S Lo and CAL S Hi - the manual settings are a compromise, but they do work and work quite well - vary from them as you wish, but do so at your own peril, the 'standard' settings can be easily restored. 73, Don W3FPR David Woolley wrote: I don't believe the manual says this, although I've only got to the 40m receive only stage. I'm actually having great fun trying to work out how the AGC system really works and really should be calibrated. One complication is that the MC1350 is only characterised for a 12 volt supply, but the K2 uses 8. If I understand the internals of the chip properly, the AGC range will be constant but the threshold will reduce by one volt for every two volts reduction in supply voltage, so the 5 to 7 volts range in the data sheet will correspond with 3 to 5 volts in the K2 (at the V AGC point, not at U2 pin 5). Is that right? Another question is how one gets 88dB+ of S meter range (6dB * (9 - 1) + 40dB) from an AGC system with a maximum range of 68dB, especially when the initial S meter calibration uses less than 1.3 volts of the available 2 volt control range? Another one is that the design seems to assume a gain balance between the AF and AGC IF chains, but the differential gain is subject to production spread in the NE612 chips (minimum to typical gain of 3dB and unspecified typical to maximum gain). It also depends, to a lesser extent, on the output impedance of the 612 in the AGC chain. The AF chain will depend on the loss in the second filter; I don't know enough about crystal filters to estimate this. There are probably some other factors. (I think there is a deliberate 6dB difference in that the nominal gain of the U2a op amp is about 22 (33k explicit over 1.5k output resistance), and the LM 380 has a nominal gain of 50). I wonder if the feedback resistor on U2a really could do with being a variable. Although you can get a similar effect with R1 (because the main part of the AGC response is exponential), you lose range on the RF gain control. ___ 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] KAT100
Hello Can the KAT100 be installed inside the K2/100 when I have the following options already installed? KSB2, K160RX, KNB2, KDSP2, and KIO2. I would like to have everything inside the K2/100 case if that is possible. Thanks Scott N5SM _ Who's that on the Red Carpet? Play win glamorous prizes. http://club.live.com/red_carpet_reveal.aspx?icid=REDCARPET_hotmailtextlink3 ___ 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 top cover accessories FS
Hello everyone, This is a re-post of my earlier message which drew no responses. I have a new K2 top cover for sale. It is equipped with a new KAT2 tuner and a KIO2 port attached in addition to the K2 speaker. The cover and all of its components work very well. All connecting cables and assembly manuals are included. My only reason for offering these components for sale is that my new KPA100 and KAT100 make them surplus to my needs. My asking price for the package is $150 plus shipping to your QTH. I guarantee your satisfaction and will happily refund your money if you are not satisfied. I will also consider selling individual components from the cover. Let me know your wishes off-line. 73 to all, Steve Banks K0PQ Sent via BlackBerry from T-Mobile ___ 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] Reversed connections from KIO2 to KAT100
I've hit a wall with one of the strangest situations, having simply not taken time to recheck all my connections on the DB9 connector from the KIO2 to the KAT100. I had the KIO2 pins reversed in color order, from 6 to 9, plugged it in to smoke test the circuit to the KAT100, and got zero results. When I checked with Gary, I was informed that some seven parts, on three boards, have to be replaced, and I'm wondering if anyone else has had this same miscue, can give me hints about what other problems have been caused by the miswiring? I have to do a lot of major surgery on the boards, and might have to realign the Control Board. Any hints and kinks beyond the missives I've already gotten will be appreciated. Murphy's Law strikes again, right at a critical time!! 73's Gil WA5YKK ___ 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] Reversed connections from KIO2 to KAT100
Gil, a good technique is to make a copy of the schematic, maybe even with magnification, to see more easily where the leads of the connector go, (to which components). Then, with a colored pencil, trace out each pin to what it is connected to (component), and evaluate what the reversed voltage situation was, and then, if it could have failed the component connected to the pin. For example, consider that a capacitor might be connected to the pin you are tracing. If it is a ceramic disk, it is not polarity sensitive and likely would also be rated at a voltage high enough to withstand anything mis-connected to it. But, if the capacitor had been electrolytic, and the wiring problem placed a negative voltage on the positive side of the capacitor, you likely would want to change it, in case it has been compromised or stressed, even if it is not showing short or open at this time. In a like manner, you can find what active components, (transistors or ICs) might need to be swapped if they endured reversed voltages, or overvoltage, such as an input being connected to a DC bus voltage. GL and 73, 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
[Elecraft] how I drew my own conclusions ...
There's recently been some discussion here about the digital voice capabilities of the K3. Disclaimer: I don't pretend to even have the slightest idea what's in the minds of the K3 designers, or their marketing direction. I have seen the AOR DV 'modem' ... but I've never met G4GUO. I'm not a TAPR member, but I've thought about it. However, I *have* read this paper, right to the end: http://www.temple.edu/k3tu/VocoderRedux.pdf and that is how I drew my own conclusions about what's possible, if you build a radio like the K3. Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html ___ 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] KAT100
Nope. Not enough room. The K2/100 is quite full. BTW, a K2/100 doesn't need the KIO2 option, it is built into the KPA100. Mark AD5SS On 6/28/07, Scott McDowell [EMAIL PROTECTED] wrote: Hello Can the KAT100 be installed inside the K2/100 when I have the following options already installed? KSB2, K160RX, KNB2, KDSP2, and KIO2. I would like to have everything inside the K2/100 case if that is possible. Thanks Scott N5SM ___ 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] Swapping Standard 2.7 kHz 5-pole Filter
Hi Bill, This is incorrect. The 2.7 kHz 5-pole can only be swapped for a 2.8 kHz or possibly the 2.1 kHz 8 pole filters. We require at least one SSB b/w filter in each K3 as it ships since we must also transmit through the filter for SSB and data modes. Transmitting through the 2.1 kHz filter will limit your tx bandwidth to that value. ( I'm not aware of many choosing the 2.1 as their only SSB filter - I may drop that as a swap option to make sure no overly narrow TX K3s get out there and confuse the market.) I'll post some more detailed DR numbers on the 5 pole vs 8 pole filters in the next couple of days. The short answer is that the 5 pole filters have slightly less IMD3 dynamic range and a wider shape factor than the 8 pole filters, but both are very good. The 250 Hz 8-pole and the 200 Hz 5 pole are both at least 95+ dB DR3 at 5 kHz, with the 8 pole beating out the 5 pole by several dB. We've been testing a number of each filter on a range of K3s to make sure we can conservatively spec them across filter variations and rig variations. :-) One other note - The sales person you talked to is Annika. There is no Monica at Elecraft, unless they are hiding her somewhere! ;-) She was clear on which filters could be swapped for the 2.7, but I'll check with her for sure tomorrow. 73, Eric WA6HHQ (Now back to work!) Bill Tippett wrote: According to Monica at Elecraft, it's possible to swap the standard 2.7 kHz 5-pole filter for either the 2.8 kHz 8-pole or the 400 Hz 8-pole for an incremental $90 ($30 credit plus the standard $120 charge for 8-pole filters), but only the 2.8 kHz and 400 Hz may be substituted for the standard filter. Now if we only knew if there were any difference in IMD/BDR performance we could make a rational decision... 73, Bill W4ZV _ ___ 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] KAT100
The KAT2 20W ATU can be installed in the K2 with these options. The KAT100 is an external only unit. 73, Eric Scott McDowell wrote: Hello Can the KAT100 be installed inside the K2/100 when I have the following options already installed? KSB2, K160RX, KNB2, KDSP2, and KIO2. I would like to have everything inside the K2/100 case if that is possible. Thanks Scott N5SM _ Who's that on the Red Carpet? Play win glamorous prizes. http://club.live.com/red_carpet_reveal.aspx?icid=REDCARPET_hotmailtextlink3 ___ 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] KAT100
Scott, If you have the KIO2 installed then you must actually have the KPA100 installed in an external EC2 enclosure - if that is true, then yes, the KPA100 and the KAT100-2 can live together in the external EC2 enclosure. BUT, if you are trying to fit everything into one K2 package with the KPA100 as the top cover on a K2, then neither the KIO2 nor the KAT100 will fit - the KPA100 takes the entire available physical space. The KPA100 does include the KIO2 functions, but not the KIO2 itself. 73, Don W3FPR Scott McDowell wrote: Hello Can the KAT100 be installed inside the K2/100 when I have the following options already installed? KSB2, K160RX, KNB2, KDSP2, and KIO2. I would like to have everything inside the K2/100 case if that is possible. Thanks Scott N5SM ___ 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] posting style
Please, no offense meant, but could Elecraft posters please put the model name of the subject of your post in the subject line of the message? Much as I should love the K2, I really would rather read only the K3 posts... and a notation in the subject line would let me go to K3 stuff only. A big thank you to one and all.. 73 Charles HarpoleHS0ZCW [EMAIL PROTECTED] _ PC Magazines 2007 editors choice for best Web mailaward-winning Windows Live Hotmail. http://imagine-windowslive.com/hotmail/?locale=en-usocid=TXT_TAGHM_migration_HM_mini_pcmag_0507 ___ 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] Swapping Standard 2.7 kHz 5-pole Filter
Date: Thu, 28 Jun 2007 21:20:26 -0700 From: Eric Swartz - WA6HHQ, Elecraft [EMAIL PROTECTED] Hi Bill, This is incorrect. The 2.7 kHz 5-pole can only be swapped for a 2.8 kHz or possibly the 2.1 kHz 8 pole filters. We require at least one SSB b/w filter in each K3 as it ships since we must also transmit through the filter for SSB and data modes. Transmitting through the 2.1 kHz filter will limit your tx bandwidth to that value. ( I'm not aware of many choosing the 2.1 as their only SSB filter - I may drop that as a swap option to make sure no overly narrow TX K3s get out there and confuse the market.) Is 2.1kHz really overly narrow for SSB transmit? I know people are talking about 1.8kHz filters for RX, and it seems useless to transmit energy that's not going to be used. It's certainly wide enough for data modes. In fact, it might be useful to be able to TX through the 400Hz filter in some of those modes. 73, doug ___ 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] posting style
On Friday 29 June 2007 00:45:44 Charles Harpole wrote: Please, no offense meant, but could Elecraft posters please put the model name of the subject of your post in the subject line of the message? I wish people would understand that hitting reply on a message in order to pick up the list address is not the correct way to start a new thread. Charles, your intended top level, new thread, is nested two deep in the KAT100 thread started by Scott. Hitting reply and changing the subject does not start a new thread. Threads, (references in the usually invisible headers), are a way to allow changing subjects as topics change and still link to the origins. Hitting reply within a thread with an unrelated topic is not only bad netiquette, the sender risks those bored with the thread won't even see it because they don't open the possibly uninteresting thread below which it was posted. Ian, G4ICV, AB2GR, K2 #4962 -- ___ 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] Swapping Standard 2.7 kHz 5-pole Filter
I was referring to voice and I'm concerned that many will think a radio that is -always- limited to 2.1 kHz TX is overly narrow and 'thin' sounding. 73, Eric _..._ Doug Faunt N6TQS +1-510-655-8604 wrote: Date: Thu, 28 Jun 2007 21:20:26 -0700 Is 2.1kHz really overly narrow for SSB transmit? I know people are talking about 1.8kHz filters for RX, and it seems useless to transmit energy that's not going to be used. It's certainly wide enough for data modes. In fact, it might be useful to be able to TX through the 400Hz filter in some of those modes. 73, doug ___ 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
