[Elecraft] K3 Deliveries etc.
I don't understand the stress factor here. The bands are in such dreadful shape (at least from here in Germany) that you can turn on your radio (mine are an FT-1000MP MkV and a K2) and you think the receivers are dead. I have a friend who has a Yaesu and Kenwood dealership, and he says guys bring in their radios all the time because they think the thing is dead on receive. He says he can't even demonstrate most days and he has a real antenna farm. About the only band that is somewhat usable from here is the 40m band. Of course some like to just sit and look at their new toy... Vy 73, Bob DJ0MBC/WU5T No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.13.1/982 - Release Date: 31.08.2007 17:21 ___ 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 Deliveries etc.
Try PSK - it's humming, I see stations at least 8,000 km away almost every day. I'm using a TS-480SAT and a trapped dipole under the roof. Otherwise I agree - in 32 years creating QRM I've never experienced such a poor year, I guess it's global warming making the MUF melt sooner. Simon Brown, HB9DRV - Original Message - From: Bob DeHaney [EMAIL PROTECTED] I don't understand the stress factor here. The bands are in such dreadful shape (at least from here in Germany) that you can turn on your radio (mine are an FT-1000MP MkV and a K2) and you think the receivers are dead. ___ 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 Deliveries etc.
About the only band that is somewhat usable from here is the 40m band. 30m at my sunset until 0100utc has been VERY hot this summer, with only a rotary Fritzel triband WARC dipole at 10m high most of the time (unless the tower was cranked up). I experienced 30m being more constant in openings and less prone to summer QRN than 40m. ___ 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] Anyone have Band decoder (KRC2) FS?
looking for good working unit , reasonable price Thank you! 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
[Elecraft] KX1 speaker output with superimposed oscillation
Hi to all, The scope shows a superimposed high frequency oscillation just on the negative peaks of the audio signal. It produces a distorted and annoying audio when the signal peaks, specially when listening a loud station on the external speaker. This happens when the volume is close to or at maximum volume. I fails just with Panasonic RP-HT60 20 Ohm headphones and external 8 ohm speaker (both work fine with my K2). It works OK with Panasonic earbud type headphone and with an external 8 Ohm load !!. I have re-check every component all around LM386 audio amp: values are OK, soldering fine. It doesn't matter if the KX1 is working with external power (7-12 V) or batteries. At 12 V the RX current drain is about 35 mA (minimum volume). I raises to 71 mA at maximum volume with the external 8 Ohm resistor, and 75 mA with the external 8 Ohm speaker. Hope somebody can help me. Thanks in advance. 73, Paco Barros _ Acepta el reto MSN Premium: Protección para tus hijos en internet. Descárgalo y pruébalo 2 meses gratis. http://join.msn.com?XAPID=1697DI=1055HL=Footer_mailsenviados_proteccioninfantil ___ 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: Elecraft Digest, Vol 41, Issue 1
Disappointing news on the re-revised shipping schedules. I had almost thought that no news is good news and that shipments would start on August 31st My feeling is that this date will slip agian judging by the extent of the problems re parts delivery. Seeing a real K3 at the RSGB HF Convention in October looks improbable, as does using my own K3 in this years CQ WW CW contenst now look increasingly unlikely... I will carry on enjoying my K2. Bob G4DBW ___ Want ideas for reducing your carbon footprint? Visit Yahoo! For Good http://uk.promotions.yahoo.com/forgood/environment.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] K3 rx
On Sat, Sep 01, 2007 at 12:13:03AM +, VR2BrettGraham wrote: Wonder if any of the K3 beta-testers have a strong out-of-band energy environment comment on how well it deals with the sort of power the likes of close-by SW b'cast can produce? I mean really strong OOB, as in -20 dBm or louder stuff at the end of the feeder. When I receive on 160 with my TS850 with my inverted vee, there is a 50KW AM station about 3 miles away that trashes the receiver. I hear nothing bothering the K3. How is the K3's AGC image response compared to the K2? I found that the mod for that will not suffice here, suggesting that even EU situation might be a bit pedestrian compared to what we seem to have around these parts now. There is simply no comparison. The AGC is probably one of the best kept secrets in the K3. Tree ___ 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: Elecraft Digest, Vol 41, Issue 1
I don't want to bring mine - but I could. I'm currently planning on bringing an IC-703 with me. I know that if I bring a K3 I'll never see it again :-) Ian G4FSU who organises the show will probably not have his K3 in time but there may well be a die-hard Elecraft fan who will have a K3 by then. Simon Brown, HB9DRV - Original Message - From: robert hammond [EMAIL PROTECTED] Seeing a real K3 at the RSGB HF Convention in October looks improbable, as does using my own K3 in this years CQ WW CW contenst now look increasingly unlikely... ___ 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 Deliveries etc.
I'm with Franki. 30m has been pretty good lately. In fact, I worked Franki just yesterday. (Your OQ5M call confused me, Franki!) He was easily S7. I think 30m is a jewel of a band, but there's not enough activity there. 73! Dan KB6NU -- CW Geek and MI Affiliated Club Coordinator Read my ham radio blog at www.kb6nu.com LET'S GET MORE KIDS INTO HAM RADIO! On Sep 1, 2007, at 7:25 AM, Franki ON5ZO wrote: About the only band that is somewhat usable from here is the 40m band. 30m at my sunset until 0100utc has been VERY hot this summer, with only a rotary Fritzel triband WARC dipole at 10m high most of the time (unless the tower was cranked up). I experienced 30m being more constant in openings and less prone to summer QRN than 40m. ___ ___ 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] Needing a little help/suggestion/reminder NO TX POWER
Morning Gang, My K2 has been sitting idle for several weeks. Fired it up this morning and all seemed just fine except that I note there is no LED power indication on the meter. All else seems to be just fine and dandy. The power level control shows the varying power level as I increase or decrease itjust no power output apparently. No sign of a transmitted signal on a secondary receiver. The K2 receiver works just fine. I'm thinking I may have inadvertantly pushed a buttom that shouldn't have been pushed? Appreciate some guidance herethanks in advance and since I've probably done something stupid, please forgive me, hi. 72 Tony, W4FOA K2 #2213 Watch your thoughts; they become words. Watch your words; they become actions. Watch your actions; they become habits. Watch your habits; they become character. Watch your character; it becomes your destiny. - Frank Outlaw ___ 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 - Extra capacitor 2.7C
Hello David, In professional Morse I have often heard R used as a . (dot) in number notation. Hence 2R7 on a capacitor is most likely 2.7 pF. 73, Roelof Bakker, pa0rdt -- Mijn Postvak In wordt beschermd door SPAMfighter. 305 spam-mails zijn er tot op heden geblokkeerd. Download de gratis SPAMfighter via deze link: http://www.spamfighter.com/lnl ___ 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] K3 at Tokyo Hamfair
Check out the youtube video of the K3 in Tokyo. I don't speak Japanese but you don't have to to see the interest Tokyo hams have in the Elecraft products. http://www.youtube.com/watch?v=u6Ls0m-trQE Robert VE3RPF ___ 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] Needing a little help/suggestion/reminder NO TX POWER
Tony Martin W4FOA wrote: ... My K2 has been sitting idle for several weeks. Fired it up this morning and all seemed just fine except that I note there is no LED power indication on the meter. All else seems to be just fine and dandy. The power level control shows the varying power level as I increase or decrease itjust no power output apparently. No sign of a transmitted signal on a secondary receiver. The K2 receiver works just fine. I'm thinking I may have inadvertantly pushed a buttom that shouldn't have been pushed? Appreciate some guidance herethanks in advance and since I've probably done something stupid, please forgive me, hi. Is it possible you are in Test Mode? Try holding the VOX button until you see the mode display (TEST or OPER). Also a flashing C on the display indicates TEST vs a solid C to indicate OPER mode when in CW mode. Gus Hansen, KB0YH ___ 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] Needing a little help/suggestion((Problem Fixed))
Gus, I was getting a flashing Cafter I turned the power off completely and turned the K2 on again, it cleared up the problem. I guess I inadvertantly must have pressed the engaged the VOX button...thanks for the tip. Kind Regards, Tony, W4FOA - Original Message - From: Augie Hansen [EMAIL PROTECTED] Cc: Elecraft@mailman.qth.net Sent: Saturday, September 01, 2007 10:35 AM Subject: Re: [Elecraft] Needing a little help/suggestion/reminder NO TX POWER Tony Martin W4FOA wrote: ... My K2 has been sitting idle for several weeks. Fired it up this morning and all seemed just fine except that I note there is no LED power indication on the meter. All else seems to be just fine and dandy. The power level control shows the varying power level as I increase or decrease itjust no power output apparently. No sign of a transmitted signal on a secondary receiver. The K2 receiver works just fine. I'm thinking I may have inadvertantly pushed a buttom that shouldn't have been pushed? Appreciate some guidance herethanks in advance and since I've probably done something stupid, please forgive me, hi. Is it possible you are in Test Mode? Try holding the VOX button until you see the mode display (TEST or OPER). Also a flashing C on the display indicates TEST vs a solid C to indicate OPER mode when in CW mode. Gus Hansen, KB0YH ___ 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 -- Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.11.19/953 - Release Date: 8/14/2007 5:19 PM ___ 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] K27100 kaputt
Hi Friends I have got a problem with my K2/100 and need your help. I built K2, KPA100, KSB2 and KAT 100 which worked OK for years from the first day until now. Recently I upgraded the KPA100 with KPA100UPKT, it passed all tests (I did not realign it), and it worked perfectly for two weeks. One day I worked in the morning without any trouble, but when in the afternoon I fired it up again, the KAT100 was unable to tune: relays clicked, diodes did not light, tune was not obtained. I disconnected KAT100 and observed that K2/100 was not working right. Connected to a dummy load, power and swr readings in the LCD display are: Setting 9 w Read 9.8 w swr 1.2.1 Setting 30w Read 27 wswr 1.8.1 Setting 90w Read 64 w swr 2.4-1 first appears HiCurr The bare K2 (disconnected from KPA100) shows no problem. Connected to the same dummy load and to an OHR qrp wattmeter, power indications agree in both LCD and wattmeter and swr is negligible. So I repeated all tests made when I built the KPA100, all were all right but D13 cathode voltage was 0 v. instead of 90 to 150 v. (K2 and KPA100 connected only with the ribbon, power supply only to the K2). Resistance between D13 cathode and ground is 10k. Then I connected again K2 and K100, power supply to the KPA100, and checked voltages of diodes D11 to D14. I remarked notable divergencies: Diode D11 D12 D13 D14 anode Tx 9 w --- --- --- 13.3 v anode Tx 90w --- - -2.2 v-2.2 v cathode Rx 9 w13.4 v 126.2 v13.4 v 126 v cathode Rx 90 w 3.4 v - 13.4 v cathode Tx 9 w 13.4 v123.4 v13.4 v 122.8 v cathode Tx 90 w --- 126.9 v -1.4 v 127.6 v Where not reported, read and standard values did not differ substantially. I suspected 90-150 v bias voltage, so I checked the involved diodes.: anodecathode D123108 D223.770.2 D3- D4 D516.231.8 D6- 16.5 D7-1.5-1.4 D8-1.7- Where not mentioned, read and standard values did not differ substantially. Should I conclude that the problem is here? And if yes, how to find the defective component? Or should I look anywhere else? I did not find anything similar in the reflector. Your help will be greatly appreciated!! I do'nt know whether the trouble was caused by a failure of the KAT100. Sorry for the long explanations, but I hope they will help. My electronics knowledge is rather poor. 73 Raimon EA3EZO [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] TAK PAK substitute
Mountian Ops, now out of business, used to make a pouch with neck strap for the K2. I still one for the FT-817 somewhere. Is there a pouch or carry bag that works well with the K2? 73, Steve N6VL ___ 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 Deliveries etc.
Bob, I don't know about your setup, but there is almost daily e-skip between DL and SM on 10 meters. Up here in SM, 10 meter has been pretty fun although is supposed to be dead. Mostly e-skip from all over EU, but also many openings to SA and some sweet openings to NA this summer. I'm sure there's been more, but there are few operators actually checking the band. If 10 meter is quiet, don't assume there is no propagation. Spin down to 11 meter and listen, you might hear 100s of stations, a pretty good indicator 10 is open. But the biggest reason for me to want my K3 now! is that topband has come to life for the winter season. I'm a tired bastard in mornings, but now I just have to wake up for sun rise every time I get the opportunity! :) Turn on the radio and activate the bands, a turned off radio won't make contacts. 73 de Björn /SM0MDG -Ursprungligt meddelande- Från: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] För Bob DeHaney Skickat: den 1 september 2007 10:34 Till: elecraft@mailman.qth.net Ämne: [Elecraft] K3 Deliveries etc. I don't understand the stress factor here. The bands are in such dreadful shape (at least from here in Germany) that you can turn on your radio (mine are an FT-1000MP MkV and a K2) and you think the receivers are dead. I have a friend who has a Yaesu and Kenwood dealership, and he says guys bring in their radios all the time because they think the thing is dead on receive. He says he can't even demonstrate most days and he has a real antenna farm. About the only band that is somewhat usable from here is the 40m band. Of course some like to just sit and look at their new toy... Vy 73, Bob DJ0MBC/WU5T ___ 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 NB
Terry Conboy wrote: How about some simple countermeasures (for a future firmware release): Blank, then transmit an equal length pulse (on a clear frequency, of course), with optional automatic ID every N minutes. If it's anything like the Russian woodpecker, it likely transmits a string of bits using a psuedo-random code in each pulse', and the radar RX can separate it's own echoes from fake ones. That's got to be very difficult noise for any NB. My TS-850 has a NB designed for the old Russian woodpecker, but I don't know how it works, and that radar is gone now so I can't try it out. Maybe there's some way to tailor the K3 DSP NB to the characteristics of the radar? 73, Fred K6DGW - Northern California Contest Club - CU in the 2007 CQP Oct 6-7 - www.cqp.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
[Elecraft] (OT) Shhhhhhh! - Quiet!
Don't tell EVERYONE how great 30M is! It might cause too much activity on the band. (:-)) On a more serious note ... Does anyone else hear the anti-religion slow CW on 10106 in the evenigs? The transmissions usually start with MU and then Rev ##, sometimes with references to religious entities being called 666 ... There are often many minutes between the one liner transmissions. 73! Ken Kopp - K0PP [EMAIL PROTECTED] or [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] K2 - Wrong Q6 Driver?
I am at the point where I need to install the driver at Q6. The manual states that I should have a 2SC2166 for the driver. However, included with my K2 6233 is a 2SC5739. The parts list in Appendix A of my Rev G. manual does not list any alternatives. Anyone have any insight? Thanks -- JT Croteau, N1ESE - Manchester, NH ___ 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] Buying into the first run
Anybody wanting to sell their deposit/space in the first K3 production line, please contact me directly. I was planning on eventually getting a second K3 for my SO2R setup, but might as well do it now if anyone can't stand the delay. tnx, Bob K5WA ___ 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] K3 Derivatives
I've noticed several offers to buy K3 1st and 2nd Prod run positions. Haven't seen any offers to sell yet. In the securities business aren't these sort of actions called derivatives? Would someone pay more for the position than the current holder of the position originally paid Elecraft? Production run positions could be traded on an open market like eBay or Craigslist or [gasp] the NYSE. 73, Fred K6DGW - Northern California Contest Club - CU in the 2007 CQP Oct 6-7 - www.cqp.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
[Elecraft] K3 Derivatives
It's like I went to a METS, ST. LOUIS ball game at their stadium, but had no tickets. A a scalper from out of a dark alley - said wanna buy a standing room only ticket? I said yes, I went to the ball game, but alas, I had no real seat. So there was some inconvenience, but I did get to see the game. PS - the METS won, St. Louis'ians fans were furious. de, Fred N3CSY PS - paid a 20% premium for ticket, seemed fair Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7 ___ 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] Final Amplifier Class
Ladies and Gentlemen, I frequently contribute technical knowhow to a CB trucker's forum (before you press delete please read on). The question came up concerning my assertion the single final transistor amplifier, typical in CB transmitter output circuits, operates as a Class A amplifier since the modulation required is AM and sometimes SSB, both being amplitude style modulations, and both desiring of good linearity in the amplification (at least I think so). I know for sure CB output circuits are not push pull since they have only one power amplifying transistor. Some are suggesting the less than 180° Class C amplification method is what CBs use. I understand this requires a good tank circuit to complete the sine waves, but is supposedly inappropriate for amplitude style modulations like AM, DSB and SSB. Various resources suggest Class C is fine for CW and FM. I am sure by now you are saying That's interesting John, really, but what does this have to do with Elecraft? Well, I suddenly remembered some advertisement for an HF Ham Transceiver that offered Class A mode in its output circuit for some improvement in some parameter. Funny thing is I guess I thought Ham Transceivers always used either Class A with a single device or, perhaps, Class AB or B in a push-pull arrangement. What I need to know from Elecraft and/or any of you is: - What is the final amplifier class (A, AB, B or C) used in, say, the KX1, K2 or K3? - Is it actually possible to use Class C with an amplitude modulation scheme like AM, DSB and/or SSB? - Is the final amplifer in the KPA100 Class A? - Do most Ham Transmitters utilize pairs of power devices in a Class AB or B in a push-pull arrangement? Hopefully this will fine tune my EE knowledge of circuits and make sure I have not missed something I should know so I can continue to represent the ham community well when offering advice to the other radio groups. Thanks for your help. John KX4O ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft CW Net Announcement
Good Evening, Sam and I have had a very pleasant day. The weather has turned quite pleasant and the prediction of rain has been called off for Labor Day. I drove into town but found the temperature was too warm for my liking. Luckily I was back home in only a few hours. Had a nice walk this morning but it was interrupted when I heard voices. No, real ones :) It appears to be some sort of hunting season and I was right in the middle of it. What clued me in was the beep of the FRS radios they were using. If they'd have been using headsets who knows when I'd have noticed. I was swamped with work this week so only got on the air once and found 4 MHz very noisy at 7 PM local time. Got myself checked in to a very weak NECOS located in Washington. Listened to the proceedings and signed off. Other than that the only radio I have heard has been the local classical station which is now playing the overture to Lohengrin. This note is being written early so I can concentrate on interfacing a few gadgets. An LCD to a uC and a computer to a radio. There may be enough time to get both done this evening before bedtime. Hopefully I will get started on cutting firewood tomorrow but have not lit the chainsaw in a few months. It may need some cleaning and adjustments. Then, I will need some adjustments after I use it for an hour! I'll start with one tank of gas so I can still move by net time. During the coming week I hope to improve my stamina while the stack of wood grows. It may take a few minutes for the buzzing to go out of my hands when I start sending so listen for the stuttering key. My hand tends to lock in the open position after I've used the chainsaw so it takes a bit of coaxing to get it to close again. However, there is some Ben Gay if necessary :) Tomorrow: 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Please join us: Sunday 2300z (Sunday 4 PM PDT) 14050 kHz Monday 0200z (Sunday 7 PM PDT) 7045 kHz 73, Kevin. KD5ONS ecn.visionseer.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] K3 Derivatives
In a message dated 9/1/07 6:36:12 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: In the securities business aren't these sort of actions called derivatives? I thought they'd be called futures, since they're actually for a product, not a security like a bond or stock. 73 de Jim, N2EY The Crimson Personal Assurance Co.. Ltd. ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ___ 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 build complete, 20m reception problems
I just finished the construction of my KX-1, including the 30/80 meter module and the antenna tuner. The rig works fantastic except for one problem: the reception on 20 meters is notably attenuated. All the other bands scream. When I switch to 20 meters, the receive sensitivity seems to drop by at least half! Suggestions, anyone? Thanks, Steve, WB4EZM ___ 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 Derivatives
On Sat, 1 Sep 2007, Fred Jensen wrote: I've noticed several offers to buy K3 1st and 2nd Prod run positions. Haven't seen any offers to sell yet. In the securities business aren't these sort of actions called derivatives? Would someone pay more for the position than the current holder of the position originally paid Elecraft? Production run positions could be traded on an open market like eBay or Craigslist or [gasp] the NYSE. Another view might be that the seller would receive emotional income by no longer having to agonize over delays, and relief that his/her deposit monies had been recovered, thus no premium charges might apply. Even if this market opened up, there might be a small number of orderers who would rather complain than either wait or dispose of their position...and they may receive emotional income from that stance. 73 k3hrn Thom,EIEIO 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
RE: [Elecraft] Final Amplifier Class
On AM, most CB sets, if not all, use class c in the final, (single device), and collector modulate it with a push pull class b modulator. Look up plate modulation, same thing but with tubes. You use class C on FM, and class ab1, ab2, or class b on ssb. Most modern ham rigs if not all use low level modulation on AM, like ssb but with both sidebands and a carrier, and amplify it like ssb, but with a much higher duty cycle. Class C can only be used with CW, FM or plate/collector modulation AM. SSB amplifiers (and AM amps) can be class B, AB1, or AB2, or A. Class A is VERY inefficient! All this stuff and more is in the handbooks. Brett N2DTS Ladies and Gentlemen, I frequently contribute technical knowhow to a CB trucker's forum (before you press delete please read on). The question came up concerning my assertion the single final transistor amplifier, typical in CB transmitter output circuits, operates as a Class A amplifier since the modulation required is AM and sometimes SSB, both being amplitude style modulations, and both desiring of good linearity in the amplification (at least I think so). I know for sure CB output circuits are not push pull since they have only one power amplifying transistor. Some are suggesting the less than 180° Class C amplification method is what CBs use. I understand this requires a good tank circuit to complete the sine waves, but is supposedly inappropriate for amplitude style modulations like AM, DSB and SSB. Various resources suggest Class C is fine for CW and FM. I am sure by now you are saying That's interesting John, really, but what does this have to do with Elecraft? Well, I suddenly remembered some advertisement for an HF Ham Transceiver that offered Class A mode in its output circuit for some improvement in some parameter. Funny thing is I guess I thought Ham Transceivers always used either Class A with a single device or, perhaps, Class AB or B in a push-pull arrangement. What I need to know from Elecraft and/or any of you is: - What is the final amplifier class (A, AB, B or C) used in, say, the KX1, K2 or K3? - Is it actually possible to use Class C with an amplitude modulation scheme like AM, DSB and/or SSB? - Is the final amplifer in the KPA100 Class A? - Do most Ham Transmitters utilize pairs of power devices in a Class AB or B in a push-pull arrangement? Hopefully this will fine tune my EE knowledge of circuits and make sure I have not missed something I should know so I can continue to represent the ham community well when offering advice to the other radio groups. Thanks for your help. John KX4O ___ 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] Final Amplifier Class
In a message dated 9/1/07 8:07:53 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: Some are suggesting the less than 180° Class C amplification method is what CBs use. I understand this requires a good tank circuit to complete the sine waves, but is supposedly inappropriate for amplitude style modulations like AM, DSB and SSB. It depends. Modes like DSB and SSB are usually generated at a low level at a fixed frequency, then heterodyned and amplified to the operating frequency. All stages in such a transmitter must be linear, which means Class A, AB, or B. Class C is right out because it's not linear. AM is different. Some AM rigs generate the signal in a manner similar to DSB or SSB, and in such cases the stages must be linear. But AM can also be generated by modulating the final stage of the transmitter. In such high level modulation schemes, the final stage does not have to be linear, and is almost always Class C. Look at amateur AM transmitters such as the EFJohnson and Heathkit for examples of how this was done. 73 de Jim, N2EY ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ___ 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] Final Amplifier Class
Yes the handbooks are the place to go and I will sit with one tonight to reboot. A splendid suggestion thanks. The information on what modern Ham Transceivers (like the K2 and K3) do is also very handy. Thanks for that too. John Gazdzinski, Brett J (Brett) wrote: On AM, most CB sets, if not all, use class c in the final, (single device), and collector modulate it with a push pull class b modulator. Look up plate modulation, same thing but with tubes. You use class C on FM, and class ab1, ab2, or class b on ssb. Most modern ham rigs if not all use low level modulation on AM, like ssb but with both sidebands and a carrier, and amplify it like ssb, but with a much higher duty cycle. Class C can only be used with CW, FM or plate/collector modulation AM. SSB amplifiers (and AM amps) can be class B, AB1, or AB2, or A. Class A is VERY inefficient! All this stuff and more is in the handbooks. Brett N2DTS Ladies and Gentlemen, I frequently contribute technical knowhow to a CB trucker's forum (before you press delete please read on). The question came up concerning my assertion the single final transistor amplifier, typical in CB transmitter output circuits, operates as a Class A amplifier since the modulation required is AM and sometimes SSB, both being amplitude style modulations, and both desiring of good linearity in the amplification (at least I think so). I know for sure CB output circuits are not push pull since they have only one power amplifying transistor. Some are suggesting the less than 180° Class C amplification method is what CBs use. I understand this requires a good tank circuit to complete the sine waves, but is supposedly inappropriate for amplitude style modulations like AM, DSB and SSB. Various resources suggest Class C is fine for CW and FM. I am sure by now you are saying That's interesting John, really, but what does this have to do with Elecraft? Well, I suddenly remembered some advertisement for an HF Ham Transceiver that offered Class A mode in its output circuit for some improvement in some parameter. Funny thing is I guess I thought Ham Transceivers always used either Class A with a single device or, perhaps, Class AB or B in a push-pull arrangement. What I need to know from Elecraft and/or any of you is: - What is the final amplifier class (A, AB, B or C) used in, say, the KX1, K2 or K3? - Is it actually possible to use Class C with an amplitude modulation scheme like AM, DSB and/or SSB? - Is the final amplifer in the KPA100 Class A? - Do most Ham Transmitters utilize pairs of power devices in a Class AB or B in a push-pull arrangement? Hopefully this will fine tune my EE knowledge of circuits and make sure I have not missed something I should know so I can continue to represent the ham community well when offering advice to the other radio groups. Thanks for your help. John KX4O ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Final Amplifier Class
Thank you all for your help with the Amplifier Class questions. I have found schematics and confirmed CBs use Class B in the final, the driver and sometimes earlier transistor circuits which ultimately feed a tank circuit before output to the antenna; It is clear the modulation happens way before it becomes 27MHz which makes good sense. By the way this all came about because I was trying to make a point to the CB crowd about their radios being constructed with the barest minimum components to get the job done. The CB finals I found handle 6 watt average max (heat sinked of course) which I hope will dissuade folks from trying to tweak tens of watts continuous out of these poor radios. As a bonus I learned more about how the various Elecraft products do their thing and for that I thank you all. We can consider this thread closed. Onward to a K2... John Huggins wrote: Yes the handbooks are the place to go and I will sit with one tonight to reboot. A splendid suggestion thanks. The information on what modern Ham Transceivers (like the K2 and K3) do is also very handy. Thanks for that too. John Gazdzinski, Brett J (Brett) wrote: On AM, most CB sets, if not all, use class c in the final, (single device), and collector modulate it with a push pull class b modulator. Look up plate modulation, same thing but with tubes. You use class C on FM, and class ab1, ab2, or class b on ssb. Most modern ham rigs if not all use low level modulation on AM, like ssb but with both sidebands and a carrier, and amplify it like ssb, but with a much higher duty cycle. Class C can only be used with CW, FM or plate/collector modulation AM. SSB amplifiers (and AM amps) can be class B, AB1, or AB2, or A. Class A is VERY inefficient! All this stuff and more is in the handbooks. Brett N2DTS Ladies and Gentlemen, I frequently contribute technical knowhow to a CB trucker's forum (before you press delete please read on). The question came up concerning my assertion the single final transistor amplifier, typical in CB transmitter output circuits, operates as a Class A amplifier since the modulation required is AM and sometimes SSB, both being amplitude style modulations, and both desiring of good linearity in the amplification (at least I think so). I know for sure CB output circuits are not push pull since they have only one power amplifying transistor. Some are suggesting the less than 180° Class C amplification method is what CBs use. I understand this requires a good tank circuit to complete the sine waves, but is supposedly inappropriate for amplitude style modulations like AM, DSB and SSB. Various resources suggest Class C is fine for CW and FM. I am sure by now you are saying That's interesting John, really, but what does this have to do with Elecraft? Well, I suddenly remembered some advertisement for an HF Ham Transceiver that offered Class A mode in its output circuit for some improvement in some parameter. Funny thing is I guess I thought Ham Transceivers always used either Class A with a single device or, perhaps, Class AB or B in a push-pull arrangement. What I need to know from Elecraft and/or any of you is: - What is the final amplifier class (A, AB, B or C) used in, say, the KX1, K2 or K3? - Is it actually possible to use Class C with an amplitude modulation scheme like AM, DSB and/or SSB? - Is the final amplifer in the KPA100 Class A? - Do most Ham Transmitters utilize pairs of power devices in a Class AB or B in a push-pull arrangement? Hopefully this will fine tune my EE knowledge of circuits and make sure I have not missed something I should know so I can continue to represent the ham community well when offering advice to the other radio groups. Thanks for your help. John KX4O ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list.
[Elecraft] FS: KAF2 Audio filter
I had the DSP units in my K2's that I sold and have this left over. It is assembled and works fine. I will ship and insure it US Priority mail for $58 or would trade for a single band 40m qrp transceiver of some type or ? Thanks Tim NZ8J [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] FS: KAF2 Audio filter
Tim, I already have the KAF2 and don't need it. But I wonder how you like the DSP versus KAF2. What modes did you use the K2's with? 73, Steve N6VL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of NZ8J Sent: Saturday, September 01, 2007 8:11 PM To: elecraft@mailman.qth.net Subject: [Elecraft] FS: KAF2 Audio filter I had the DSP units in my K2's that I sold and have this left over. It is assembled and works fine. I will ship and insure it US Priority mail for $58 or would trade for a single band 40m qrp transceiver of some type or ? Thanks Tim NZ8J [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 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
