[Elecraft] N2CQ QRP Contest Calendar: July 13 to Aug 12, 2010
~ N2CQ QRP CONTEST CALENDAR July 13 to Aug 12, 2010 ~ Summer FOX Hunt - QRP 20M CW... QRP Contest! EDT: Each Tue starting July 6, 9 PM to 1029 PM UTC: Each Wed starting July 7 0100z to 0229z Info: http://www.qrpfoxhunt.org/ ~ CWops Mini-CWT Test (CW) ... QRP Category Jul 14, 1100z to 1200z and Jul 14, 1900z to 2000z and Jul 15, 0300z to 0400z Rules: http://www.cwops.org/onair.html ~ Digital Mode Club (DMC) Contest (RTTY) ... QRP Category Jul 17, 1200z to Jul 18, 1200z Rules: http://www.digital-modes-club.org/ ~ North American QSO Party (RTTY) /QRP Entries Noted Jul 17, 1800Z to Jul 18, 0600Z Rules: http://www.ncjweb.com/naqprules.php ~ CQ WW VHF Contest (All, 6 2 Meters) ... QRP (10W) Category Jul 17, 1800z to Jul 18, 2100z Rules: http://www.cqww-vhf.com/ ~ RSGB Low Power Field Day (CW) ...QRP Contest! Jul 18, 0900z to 1200z Jul 18, 1300z to 1600z Rules: http://www.rsgbcc.org/hf/rules/2010/rqrp.shtml ~ Colorado Gold Rush (20 mtr CW QRP) ... QRP Contest July 18, 2000z to 2159z Rules: http://www.cqc.org/contests/gold2010.htm ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EDT: Jul 18, 9 PM to 11 PM UTC: Jul 19, 0100z 0300z Rules: http://www.fpqrp.com/ ~ NAQCC Straight Key/Bug Sprint *** QRP CONTEST! *** EDT: Jul 21, 8:30 PM to 10:30 PM UTC: Jul 22, 0030z to 0230z Rules: http://home.windstream.net/yoel/contests.html ~ Islands On The Air Contest (CW/SSB) ... QRP Category Jul 24, 1200z to Jul 25, 1200z Rules: http://www.rsgbcc.org/hf/rules/2010/riota.shtml ~ Flight of the Bumblebees (CW) ... QRP Contest! EDT: Jul 25, 1300 to 1700 UTC: Jul 25, 1700z to 2100z Rules: http://adventure-radio.org/wiki/index.php?title=Main_Page ~ SKCC Sprint (Straight Key CW) ... QRP Awards Jul 28, z to 0200z Rules: http://www.skccgroup.com/sprint/sks/ ~ Adventure Radio Spartan Sprint (CW) *** QRP Event! *** Aug 3, 0100z to 0300z (First Monday 9 PM EDT) Info: http://adventure-radio.org/wiki/index.php?title=Main_Page ~ Ten-Ten QSO Party (PH) ... QRP Category Aug 7, 0001z to Aug 8, 2359z Rules: http://www.ten-ten.org/Forms/QSOPartyRulesRevised.pdf ~ TARA Grid Dip Contest (PSK/RTTY) ... QRP Category Aug 7, z to 2400z Rules: http://www.n2ty.org/seasons/tara_grid_rules.html ~ EUROPEAN HF CHAMPIONSHIP (PH/CW) (EU work EU) Low Power Category Aug 7, 1200z to 2359z Rules: http://lea.hamradio.si/~scc/euhf/euhfcrules.htm ~ ARRL UHF Contest ... Low Power Category Aug 7, 1800z to Aug 8, 1800z Rules: http://www.arrl.org/august-uhf ~ North American QSO Party (CW) ... 100W Max. (/QRP noted on entry) Aug 7, 1800z to Aug 8, 0600z Rules: http://www.ncjweb.com/naqprules.php ~ SKCC Weekend Sprintathon (Straight Key CW) ... QRP Category Aug 8, z to 2359z Rules: http://www.skccgroup.com/sprint/wes/ ~ NAQCC Straight Key/Bug Sprint (CW) *** QRP Contest *** EDT: Aug 10, 8:30 PM to 10:30 PM UTC: Aug 11, 0030Z to 0230Z Rules: http://home.windstream.net/yoel/contests.html ~ CWops Mini-CWT Test (CW) ... QRP Category Aug 11, 1100z to 1200z and Aug 11, 1900z to 2000z and Aug 12, 0300z to 0400z Rules: http://www.cwops.org/onair.html ~ Thanks to SM3CER, WA7BNM, N0AX(ARRL), VA3JFF G4GXL (QRPARCI) N2APB (AmQRP), WB3AAL (EPAQRP) and others for assistance in compiling this calendar. If you wish to subscribe to the Calendar, send an e-mail to n...@arrl.net Please forward the contest info you sponsor to n...@arrl.net 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 N2CQ QRP Contest Calendar
Re: [Elecraft] continuous relay click in RX ANT IN
I found in my shack a Front End Saver http://www.radio-ware.com/products/fes.htm that I never installed. Seems is similar to this made from ICE, at least will add extra protection to the K3, what do you think? Or it will decrease the RX signals I can receive in the K3? Thanks, Jorge CX6VM/CW5W -Mensaje original- De: Brett Howard [mailto:br...@livecomputers.com] Enviado el: Domingo, 11 de Julio de 2010 10:29 p.m. Para: Jorge Diez - CX6VM CC: 'Tom W8JI'; 'Elecraft Reflector' Asunto: Re: [Elecraft] continuous relay click in RX ANT IN I had this going on too and a really slick way to fix the problem is with an RF limiter... http://www.iceradioproducts.com/reconly.html#rflimiter I.C.E. makes a very cost effective unit that gets the job done very well... I ordered the 196 unit and then I didn't want to have it with RCA connectors on it so I asked them to build it wit the BNC connectors like they do on the VHF unit. They had no problem with that and did so no extra cost. ~Brett (N7MG) On Sun, 2010-07-11 at 18:27 -0300, Jorge Diez - CX6VM wrote: ems is the proximity of the antennas. I was using a sloper for 160 mts from a 118ft tower and the 40-2CD was on top of this tower. So I couldnt connect the 40-2CD in the RX ANT IN. So I switch the knob in my sixpack to listen in the 40 and then switch again to TX on the 160 antenna, hope this will not cause a problem in the rig? Thanks! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] continuous relay click in RX ANT IN
Seems is similar to this made from ICE, at least will add extra protection to the K3, what do you think? Or it will decrease the RX signals I can receive in the K3? As far as I know that unit uses reed relays, and should have no detectable loss. I think there might be two models of that, but I have only seen a reed relay version. The advantage of the one I saw is the low loss and no signal distortion using relays. You must run the amplifier relay control through it to be sure the protection sequence is correct. 73 Tom __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and USB Audio Codec
I don't trust the quality of an external soundcard of this price. It might be sufficient for PSK31 but probably not for Winmor. The Signalink USB is good, but not for 20 bucks. The USB Audio CODEC integrated circuit in the IC-7000 or IC-7600 has the same specifications as the USB Audio CODEC in Signalink or a $15 USB headset adapter. There is no benefit to putting audio to digital conversion in the radio and bringing the audio out using a driver dependent protocol. An integrated USB audio CODEC is nothing more than a gimmick that provides no performance benefit while limiting user flexibility/choice, increasing cost and decreasing reliability. If one were going to provide digital output, it would be far better to stream the raw in I/Q data from the DSP's ADC via firewire rather than push it through two additional A/D and D/A steps and reduce it to a single channel of audio. 73, ... Joe, W4TV On 7/10/2010 3:48 PM, oe9fwv wrote: I don't trust the quality of an external soundcard of this price. It might be sufficient for PSK31 but probably not for Winmor. The Signalink USB is good, but not for 20 bucks. I have not heard of a problem with the DSP in the IC-7200 or 7600. From what I have heard this is not a real soundcard but the IF passband after the DSP is sent to the audio codec via USB. It would make it very easy using the K3 for digital soundcard modes without another external device. 73! de Werner OE9FWV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 SSB Data - No Output, Need suggestions
What is selected for your SSB and DATA transmit filter? If you are using a 2700 Hz filter is the offset value set properly? 73, ... Joe, W4TV On 7/10/2010 6:05 PM, Jim / W6JHB wrote: Been using my K3 number 4359 on CW for almost a month - very happy. Last night I hooked up my SignaLink USB and tried PSK31. Got a waterfall display, signals present and being decoded, but NO output when CocoaModem set to transmit. Figured I had something hosed in the SL jumpers - checked three times, they are OK. So, hooked up my Elecraft MH2 Mic and thought I'd give SSB a try this afternoon. NO OUTPUT! I have the K3 set on 14.200 (dummy load), RF power at 40w, Mic Sel = FP.L, Mic + Lin = OFF. I press the PTT button on the mic, I get the red TX light on the K3, the radio appears to go into transmit mode, but no inkling of RF when I speak into the mic. I have the Mic control at 23, CMP = 0, Mon = 53. So, what have I forgotten to set? I'm betting that whatever is hosed with the SSB setting may fix my PSK31 problem, too. Anyone have any suggestions? Tnx, Jim / W6JHB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Now I've heard everything
Can anyone else confirm or deny that their PA talks back to them? Does not do it here. I've made the same tests using the SDR-IQ with the directional coupler from my LP-100 and additional attenuation for the input to the SDR-IQ. IMD was stable as long as the power level was stable (Keep ALC at 5 bars and adjust power with the power control) and not particularly temperature sensitive although I did not push long key down times. I also made measurements of transmit image (+/- 30 KHz) using the FM filter for transmit in SSB and CW (no measurable image within the range of the SDR-IQ) using the same test set-up. The only thing I found necessary was to keep the SDR-IQ and K3 separated (could not leave the SDR-IQ set on the top of the K3) and use good quality cable between the SDR-IQ and directional coupler to limit any direct pick-up. 73, ... Joe, W4TV On 7/12/2010 1:25 PM, Wes Stewart wrote: Having just acquired an RFSpace SDR-IQ I thought I'd take a look at the K3's transmit IMD, particularly with respect to input voltage and output power. So I engaged the 2-tone generator, connected a dummy load and proceeded to take a look at the output spectrum. I haven't gotten very far with this because 1) the IMD is apparently temperature sensitive and drifts, becoming a moving target and 2) I can hear the two tones acoustically emanating from the PA. The level is somewhat proportional to RF power and goes away completely when the power is reduced to the point where the PA drops out. Can anyone else confirm or deny that their PA talks back to them? Wes N7WS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 SSB Data - No Output, Need suggestions
Jim, I am using essentially the same setup. I got a lot of help from Chen (W7AY) the author of CocoaModem. I also had a problem of no output and it turned out to be that I was using the default jumper settings on the Signalink and you need to boost the output by setting jumper 3 (JP3). Otherwise, the audio level is too low to drive the K3. So, if you have not done that then I suggest you give it a try. From Chen's advice, I have my audio level to about 0.25 volts RMS (I think that is right, I am going from memory)...along with the Signalink TX level of about 1 oclock this gives the recommended 4 (to 5) bars on the K3 ALC bar graph. More then that and you will be overdriving. 73, phil, K7PEH On Jul 10, 2010, at 4:52 PM, Jim / W6JHB wrote: Got the SSB problem fixed - as suspected, it was my fault - I had mis-read the manual regarding the bias setting for the MH2 Mic. Ooops! But, it did NOT resolve the PSK31 issue. I finally got CocoaModem to trip the PTT on the K3, but still no RF flowing. I'd appreciate hearing from anyone using CocoaModem and the K3 to do PSK31. Maybe we can go over settings to see what I've messed up... Tnx 73, Jim / W6JHB -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-SSB-Data-No-Output-Need-suggestions-tp5278730p5278907.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] P3 Manual
Any update on when the P3 manual will be on the elecraft website? I remember someone said it was going to be online before the release date. I hope the release date has not changed. I hope to see mine soon. KE4INM Jim __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and USB Audio Codec
On Jul 10, 2010, at 7/102:57 PM, Joe Subich, W4TV wrote: If one were going to provide digital output, it would be far better to stream the raw in I/Q data from the DSP's ADC via firewire rather than push it through two additional A/D and D/A steps and reduce it to a single channel of audio. FireWire is not necessarily a great solution either. It will definitely require special drivers at the computer end (viz, the Edirol FA-66 that is common in ham SDR circles). One good connection that I have come across is S/PDIF that is available on the Icom IC-7800. It allows a connection between the radio and the computer that is completely non-galvanic. No ground loops, no RFI, down to -144 dB. S/PDIF provides an audio path with up to 20 bits of resolution (about 120 dB, with 1 bit being 6.02 dB), with 24 bits being an option by using the extra 4 steering bits as data. The standard sampling rate for S/PDIF is 48,000 samples per second stereo, which would support almost 50 kHz of bandwidth on an baseband I/Q channel. S/PDIF provides up to about 30 feet separation between equipment. Both Firewire and S/PDIF lacks a standard way of passing control/ status signals. The Flex-5000 (which uses FireWire) used to hack into the MIDI (Musical Instrument Digital Interface) channel for control/ status; but I have not been following that development and it might have since changed. The Icom IC-7800 goes through its regular CAT path (RS-232 or CI-V, you get to choose, I believe). In any case, if you want a rig like the K3 to support 123 dB of dynamic range I/Q output, it will not come cheap. The Asahi AK-5394A is probably the most expensive component in the front end of the Flex-5000, and you have to be very careful with the circuit layout to get a -125 dB noise floor when mixing analog and digital components. We are definitely not talking about 16-bit codecs like the one in the SignaLink USB -- which by the way, is a TI/Burr-Brown PCM-2902, and it is not the $20 that people have been mentioning, but is $5.85 at DigiKey :-). 73 Chen, W7AY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Wanted: Elecraft K3 Options (KAT3 Tuner, Filters, 2nd RX...)
Hello! I am looking for some options for my K3. KAT3 Tuner, KTCXO3-1 TCXO, KXV3A RX Ant., IF Out and Xverter Interface (last Version), KFL3A-2.8K 2.8 kHz, 8-pole filter, KFL3A-400 400 Hz, narrow 8-pole filter, KFL3A-250 250 Hz, narrow 8-pole filter etc.. Thanks 73s Alex NH7VW -- View this message in context: http://elecraft.365791.n2.nabble.com/Wanted-Elecraft-K3-Options-KAT3-Tuner-Filters-2nd-RX-tp5288469p5288469.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Some OT help with a repeating email on this list
When it doesn't happen to everyone, it's not being sent multiple times from source. This leaves your ISP. The best guess is mail processing software at your node plus the processing time at your PC, with ISP's processing probably having time-outs for certain activities, and your email plus attached file is taking so long to come back and say I got it, delete it, that it's doing the conservative thing, timing out and holding on to it for another try. If your ISP has a web read interface direct, then use it to delete a duplicating file. This will short cut some of the processing time and allow the ISP to mark it off. If this is happening on your ISP's web interface, call the ISP, you can't fix it yourself. 73, Guy. On Tue, Jul 13, 2010 at 1:43 AM, David Cutter d.cut...@ntlworld.com wrote: It happens to me occasionally, but it's not just this list. It used to happen a lot over weekends. It doesn't happen so often and I've assumed it is the flaky software from my ISP, or it could be something flaky with my laptop having a bad hair day. It's happened to others - you are not alone. David G3UNA On 7/12/2010 3:09 PM, Pete Spotts wrote: ... I've been receiving an email all day today (now up to 9 copies) related to the photos from the WRTC. ... Any thoughts as to where I should look? Having not seen that behavior here, it's not likely a reflector problem. I'd suggest a call to your ISP. Gus Hansen KB0YH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] WRTC - photo gallery
GA, I have received a barrage of this email. I've probably gotten the same email 20-30 times over the past day. Dick, K2ZR Pete Smith wrote: It's a good thing we contesters are smart and nice folks, cuz we sure aren't pretty. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at telnet.reversebeacon.net, port 7000 On 7/11/2010 4:44 AM, Dale Harding K7DNH wrote: There are several photos of the K3s at WRTC http://www.wrtc2010.ru/index_photo.php __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Questions about K3 repair and upgrades
Hi, all concerned: 1. Do I need smt de-soldering equipment to replace a failing CMP-PWR-MON shaft encoder? 2. Can I install a second antenna jack without buying an antenna tuner I don't need? Would I need a relay? I'd like to put 6M on ANT 2 for convenience (and uncharacteristic economy since I'm on a fixed income now). 3. How does the DSP upgrade change what I've been satisfied with hearing for several years, mostly on cw, with good cans? Full disclosure: my hearing at just-shy of 67 is, ah, somewhat deteriorated with tinnitus. 4. Haven't felt the press for any of the other hardware mods. Should I? Do any of you on that long list of builders/repairmen on the site do the mods? Fwiw, I compared good experiences between a modified FT-1000D and a K3, A/B-style with a coax switch, over a 6-8-month period in my shack. I have only a small regret over selling the Yaesu: I miss 200W on 30M, to which there's an easy fix. If the K3 were not on the market, I would still have the FT-1000D; in my not-so-mumbled opinion, there's nothing better *that I can afford* out there. Tia for reading, and for any responses. Brgds, Dave, N3HE -- View this message in context: http://elecraft.365791.n2.nabble.com/Questions-about-K3-repair-and-upgrades-tp5288879p5288879.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Heads up - Small Price increase on K3 and our other products coming
As a heads up to our loyal customers (and potential customers who are considering our products) we will be adjusting our prices up slightly on the K3 and a number of our other products before the end of next month. Of course, any orders received prior to that point will be honored at the pre-increase pricing. As the U.S. slowly heads out of recession we are seeing our suppliers increase their prices on a number of components etc. (A normal occurrence for this part of the economic cycle.) So far we have been to absorb most of these, but we will have to make some adjustments as we go forward. Of course we will strive to keep any increases modest and reasonable. 73, Eric WA6HHQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K-1 RIT Range mod, audio AGC.
Is there a modification to reduce the RIT range on the K-1 to about +- 1KHz? I'd also be grateful to know of a pot suitable for this mod that had a center detent. Or a multi-turn pot that would fit in the allowed space Also, I'm looking for an outboard audio AGC circuit into about a 2 Watt amp. I find that the sidetone is way too loud when I'm searching for weak signals and have the audio turned up. Am now using a DSP-59+ for the AGC action but it is a bit noisy and physically large. 72, Tim FIRE SALE: iPads for $23.74? SPECIAL REPORT: iPads are being auctioned for an incredible 85% off! http://thirdpartyoffers.juno.com/TGL3131/4c3cba2fc7cad27f3abst03duc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Some OT help with a repeating email on this list
Hello Guy Thanks for that run-down. It never happens on the web access to my email and by the time I've loaded up the web page it's usually stopped replicating. Anyway, these days it only replicates once and then not very often. I felt sure it was some kind of timing problem and probably the laptop with some issue. I updated the BIOS recently and it may have influenced things. 73 David G3UNA When it doesn't happen to everyone, it's not being sent multiple times from source. This leaves your ISP. The best guess is mail processing software at your node plus the processing time at your PC, with ISP's processing probably having time-outs for certain activities, and your email plus attached file is taking so long to come back and say I got it, delete it, that it's doing the conservative thing, timing out and holding on to it for another try. If your ISP has a web read interface direct, then use it to delete a duplicating file. This will short cut some of the processing time and allow the ISP to mark it off. If this is happening on your ISP's web interface, call the ISP, you can't fix it yourself. 73, Guy. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K-1 RIT Range mod, audio AGC.
Tim, There are several ways to change the RIT range. The circuit is a simple voltage divider with the pot in the middle. Currently each resistor is 10k - Front Panel R4 and R5 sit on each side of the pot and the series combination is fed by the 6 volt regulated supply. If you increase both R4 and R5 (keeping both values the same) the voltage range controlled by the pot will be smaller. How much smaller is to be determined either by calculation along with checking the datasheet for the MV209 Varactor or experimentation. Right now the offset voltage to the varactor in the VFO is varied from 4 volts to 2 volts - and you may want to cut it by about half that range (I have not checked the datasheet, that is only a good guess, so you might try 24 k instead of 10k for R4 and R5 - if that does not give you the range you want, try another value. Ant 10k pot of the same size and mounting can be used in place of R3 - if you can find one with a center detent, I am certain many would like to know about it. The problem with using a center detent is that zero RIT offset may not occur right at the center of the pot rotation, and you will have to fiddle with the relative values of R4 and R5 to place the center where you want it. No answer on the outboard AGC - but you might want to adjust the sidetone volume down in relation to the signals using the ST L menu. Having the sidetone volume follow the AF Gain control is an oft disputed point for the K2 (which does not adjust sidetone volume with AF Gain) - it seems it is not possible to please everyone. 73, Don W3FPR k...@juno.com wrote: Is there a modification to reduce the RIT range on the K-1 to about +- 1KHz? I'd also be grateful to know of a pot suitable for this mod that had a center detent. Or a multi-turn pot that would fit in the allowed space Also, I'm looking for an outboard audio AGC circuit into about a 2 Watt amp. I find that the sidetone is way too loud when I'm searching for weak signals and have the audio turned up. Am now using a DSP-59+ for the AGC action but it is a bit noisy and physically large. 72, Tim FIRE SALE: iPads for $23.74? SPECIAL REPORT: iPads are being auctioned for an incredible 85% off! http://thirdpartyoffers.juno.com/TGL3131/4c3cba2fc7cad27f3abst03duc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Operating Tip: Using TX TEST to adjust speech controls and ALC level
The K3 provides a way to adjust speech controls and ALC level off-air. (Technical note: The reason this is possible is that the K3's fast ALC is established in the DSP. This means the K3's first-I.F. crystal filters can be used in TX mode to ensure that dynamic ALC responses are band-limited. This prevents the kind of splatter often heard from rigs that apply fast ALC in hardware, after the crystal filter. This technique also allows the DSP to provide very effective, very clean speech compression.) To adjust speech controls off-air: 1. Hold TX TEST (right end of the MODE switch). The TX icon on the LCD will flash slowly as a reminder that you're not actually transmitting. 2. Switch to CMP/ALC metering by holding METER. Temporarily set the CMP control to zero. 3. While talking into the mic, adjust the MIC level so you peak around 5-7 bars on the ALC meter during normal speech. After that you can optionally add compression (CMP). 4. To return to normal operation, hold TX TEST again, and make sure the TX icon is no longer flashing. You should now be able to set PWR to any desired level without impacting your speech settings. If you'd like to lock the CMP, MIC, and PWR level settings (perhaps to avoid having your 6-year-old tweak them, like mine does), locate the PWR SET menu entry (CONFIG menu) and tap 1 to LOCK. You'll then see LOCKED whenever any of these three controls is rotated. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 10W PA problem
I removed the PA transistors and measured the bias, which is 0.64V and this should be fine... Probably, it was only an heatsinking problem, unless the TX current is wrong: without the PA transistors, with RF Power set to 5.0W (with any value greater than 0.1W is the same), the TUNE current is 0.62A (0.24A in RX) Is it ok 0.62A? Thanks and 73 Guido, ik2bcp Don Wilhelm wrote: Guido, Since the normal base to emitter voltage on the PA transistors self limits at about 0.63 volts, the best way to check the bias voltage is to remove the PA transistors and measure it. With the PA transistors out, if the base voltage during a TUNE is between 0.6 and 0.63 volts, then Q11 and Q13 are doing their job and you have faulty PA transistors. For proper heatsinking, yes the PA transistors must fit flat against the heatsink. Before soldering the PA transistors in place, I position them on their mounting hardware and secure them temporarily with a nut (no lockwasher, no thermal pad). That places the tab parallel with the RF board. Solder the transistors and remove the nuts - add the thermal pads and mount the heatsink. 73, Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 10W PA problem
Guido, I would like to see the base bias voltage a little bit lower - 0.63 maximum, .62 nominal. I recommend replacing Q11 and Q13. Yes, the current draw without Q7 and Q8 installed is within the normal range. 73, Don W3FPR Guido Tedeschi wrote: I removed the PA transistors and measured the bias, which is 0.64V and this should be fine... Probably, it was only an heatsinking problem, unless the TX current is wrong: without the PA transistors, with RF Power set to 5.0W (with any value greater than 0.1W is the same), the TUNE current is 0.62A (0.24A in RX) Is it ok 0.62A? Thanks and 73 Guido, ik2bcp Don Wilhelm wrote: Guido, Since the normal base to emitter voltage on the PA transistors self limits at about 0.63 volts, the best way to check the bias voltage is to remove the PA transistors and measure it. With the PA transistors out, if the base voltage during a TUNE is between 0.6 and 0.63 volts, then Q11 and Q13 are doing their job and you have faulty PA transistors. For proper heatsinking, yes the PA transistors must fit flat against the heatsink. Before soldering the PA transistors in place, I position them on their mounting hardware and secure them temporarily with a nut (no lockwasher, no thermal pad). That places the tab parallel with the RF board. Solder the transistors and remove the nuts - add the thermal pads and mount the heatsink. 73, Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] D104 mic
This link from W5EZY should make all the old D-104's come back to life. Chris W7CTH -- View this message in context: http://elecraft.365791.n2.nabble.com/D104-mic-tp5276371p5290288.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Questions about K3 repair and upgrades
1. Do I need smt de-soldering equipment to replace a failing CMP-PWR-MON shaft encoder? No 2. Can I install a second antenna jack without buying an antenna tuner I don't need? Would I need a relay? I'd like to put 6M on ANT 2 for convenience (and uncharacteristic economy since I'm on a fixed income now). There's room for another SO-239 connector in the back, remove the back plate and you can mount it there. Connecting it to the rig is another matter. 3. How does the DSP upgrade change what I've been satisfied with hearing for several years, mostly on cw, with good cans? Full disclosure: my hearing at just-shy of 67 is, ah, somewhat deteriorated with tinnitus. The DSP upgrade makes a big difference if you're using ESSB. With CW you keep your filter under 500Hz most of the time. So most of that freq. isn't even there... However, After doing the mod myself, I've found that the low Freq. roll off portion gives me about an extra 75Hz at -30dB and about another 150Hz range in the low end if I go down to -60dB The daughter card high end roll off part of the upgrade is rather nice on the ears. It takes a lot of the high end noise and filters it out. Again, if you're using a tight filter I've found that it's not THAT big a difference. In most cases your filter will be too tight to hear all the high freq. If you can't hear above 8 or 12KHz, don't bother! It wont make a bit of difference. 4. Haven't felt the press for any of the other hardware mods. Should I? Do any of you on that long list of builders/repairmen on the site do the mods? How old is your rig? What mods do you need? There are a few as a CW op that I would do.. Like the Synth Board mods. The VFO noise mod, the Speaker protection mod (not needed really if you swap the DSP board) and a few others. Fwiw, I compared good experiences between a modified FT-1000D and a K3, A/B-style with a coax switch, over a 6-8-month period in my shack. I have only a small regret over selling the Yaesu: I miss 200W on 30M, to which there's an easy fix. If the K3 were not on the market, I would still have the FT-1000D; in my not-so-mumbled opinion, there's nothing better *that I can afford* out there. Wait till the KPA500 comes out, save your money now and you can have your 200 watts back again. Tia for reading, and for any responses. Brgds, Dave, N3HE -- View this message in context: http://elecraft.365791.n2.nabble.com/Questions-about-K3-repair-and-upgrades-tp5288879p5288879.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html _ Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Any P3 Updates?
Hi everybody; Well, it's Tuesday the 13th here and I see no further P3 news. Would like a happy shiping thought if possible. best Regards, Bob K7HBG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Any P3 Updates?
Hi Bob, Our field testers are pounding on things as we speak. We're quickly iterating on firmware, trying to keep up. The manual is mostly written and should be available soon. We may have something else to add later tonight or tomorrow regarding the schedule. I've been having a great time with my field-test P3. It's cool to be able to see an entire band segment at a glance -- bands that sound dead often don't look dead. I'm making good use of the P3's point- and-click markers, and I'm quickly learning what different modulation modes look like on screen. You can even copy CW signals off the waterfall display thanks to the very fast sampling speed. 73, Wayne N6KR On Jul 13, 2010, at 6:13 PM, k7hbg @dslextreme.com wrote: Hi everybody; Well, it's Tuesday the 13th here and I see no further P3 news. Would like a happy shiping thought if possible. best Regards, Bob K7HBG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Any P3 Updates?
Patience is a virtue. The P3 (and manual) will be available in due time. Like as fine wine, it cannot be rushed. Give the Field Testers time to try it out and review the manual and then (and only then) it will be released. You will appreciate the product more after the Field Test. Only the Field Testers will see the preliminary copies of the manual - a lot of the Field Test effort is scrubbing the manual. 73, Don W3FPR k7hbg @dslextreme.com wrote: Hi everybody; Well, it's Tuesday the 13th here and I see no further P3 news. Would like a happy shiping thought if possible. best Regards, Bob K7HBG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Any P3 Updates?
Eric posted the following on July 4th. This qualifies as an update in my book. We're darn close and the P3 is proceeding on plan so far. Everything has been released to production and we are just awaiting delivery of the final production sheet metal and stuffed PCBs. We're also refining the firmware as we go through field test over the next couple of weeks. Based on where we were a week ago, my best estimate is somewhere between 7/15 and 7/25 for initial shipments. It will then take about 4-5 weeks to ship all of the rather large backlog. 73, Eric WA6HHQ Also waiting (but patiently) Bruce, N1RX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Any P3 Updates? Oh Yah!
Oh, Good Grief! I'm speechless. A response in five minutes from one of the founders of the company along with the head K2 guru. Thanks guys! Now, THAT'S Elecraft in action. Best regards, Bob __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Let's Try This Again -- was [K3] ... A 750 Hz, 8-Pole ... Filter?
Referring to http://mailman.qth.net/pipermail/elecraft/2010-June/131426.html recently I posted several reasons why K3 owners might be interested in a 750 Hz 8-pole INRAD roofing filter. The response to that post was immediate and enthusiastic, but it wasn't sufficient for us to commission INRAD to begin production. Perhaps the reason for the limited response was that folks were already firmly focused on Field Day? Whatever the reason ... once again ... if you are interested in a 750 Hz 8-pole INRAD roofing filter for your K3, please email me (off-Reflector) at webmas...@unpcbs.com to express your interest. If instead you think that there might be a greater demand for some other bandwidth 8-pole INRAD roofing filter, please email me (off-Reflector) to let me know that width and include your reasoning for desiring that other width. 73 and TNX for the B/W, Gary KI4GGX K3 #2724 P.S. Keep in mind that if Wayne and company ever do get around to offering a few choices of their long-promised dual-width (formerly variable-width) filters, that those filters will almost certainly be of the same 5-pole design as the three existing Elecraft roofing filters. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA100/KAT100 SWR Fault
Dear Reflector, Hello again. I wish I wrote more often to say how good my K2 and KPA100 with KAT100 are working, but I don't. They have been working great. I built a KPA100 and KAT100 into an EC2 enclosure. Everything has worked well for quite some time now (~1 yr.). Today, I write with a problem: I fired up my rig and find that the SWR indication on the KAT100 is faulty. Here are the symptoms, transmitting into a dummy load: First, something that works properly: when I dial up the output power without transmitting, the PWR range LED switches from low to high at ~9 watts. Then -- with the ATU in CAL mode -- when I hit TUNE with the power set to the low end of either the low- or high-power ranges none of the SWR LEDs light. With the K2 still in TUNE mode, as I slowly dial up the power, suddenly all of the SWR LEDs light. This happens if I start at 1 watt and tune to about 5 watts; and if I start at 10 watts and dial up to about 50 watts. When I hit TUNE at about 1 watt and dial up the power past 9 watts, the SWR LEDS come on at about 5 watts, then I hear a relay click in the KAT100/KPA100 indicating it changed power range at about 9 watts, but the PWR range LED does not flip from low to high and all the SWR LEDs remain lit. I also get erratic HiRFL messages on the K2 display, but not reliably when all the SWR lights come on as I described above. The K2/KPA100/KAT100 currents are normal. Otherwise, the rig seems to perform as it did before this fault appeared. Output power is good, and it all seems to transmit into an antenna that I know is resonant and good on 20 m. What should I check out first? It might help to know that between the time I noticed this problem and the last time I used the rig, there was a thunderstorm in my area. While I normally set my antenna switch to ground the antenna and project my xmitters, I did not do so this time. My coax is grounded with two levels of lightening protection at the house: cheap lightening-arrester connectors outdoors followed by an alpha-delta coax switch with the arc-plug indoors. The arc-plug is not popped, or however you describe it -- it works fine still. Perhaps a lightening pulse of some sort caught something in the SWR section of the KAT100??? Thanks to the community for help with this problem. Doug TRY FREE IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if5 Capture screenshots, upload images, edit and send them to your friends through IMs, post on Twitter®, Facebook®, MySpace™, LinkedIn® – FAST! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Any P3 Updates? Oh Yah!
So don't forget this famous sentence :We at Elecraft don't sleep AD4C If you see a driver handling a cell phone on her/his hands while driving,do please stay away from that vehicle,its a moving bomb.Your life is at danger.Keep yourself and your family alive --- On Wed, 7/14/10, k7hbg @dslextreme.com k7...@dslextreme.com wrote: From: k7hbg @dslextreme.com k7...@dslextreme.com Subject: [Elecraft] Any P3 Updates? Oh Yah! To: Elecraft elecraft@mailman.qth.net Date: Wednesday, July 14, 2010, 1:37 AM Oh, Good Grief! I'm speechless. A response in five minutes from one of the founders of the company along with the head K2 guru. Thanks guys! Now, THAT'S Elecraft in action. Best regards, Bob __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA100/KAT100 SWR Fault
Doug, I suspect that one or both of the wattmeter diodes in the KAT100 are fried. It would be a good idea to check those in the KPA100 as well. KAT100 D1 and D2 and KPA100 D16 and D17. 73, Don W3FPR Douglas Furton wrote: Dear Reflector, Hello again. I wish I wrote more often to say how good my K2 and KPA100 with KAT100 are working, but I don't. They have been working great. I built a KPA100 and KAT100 into an EC2 enclosure. Everything has worked well for quite some time now (~1 yr.). Today, I write with a problem: I fired up my rig and find that the SWR indication on the KAT100 is faulty. Here are the symptoms, transmitting into a dummy load: First, something that works properly: when I dial up the output power without transmitting, the PWR range LED switches from low to high at ~9 watts. Then -- with the ATU in CAL mode -- when I hit TUNE with the power set to the low end of either the low- or high-power ranges none of the SWR LEDs light. With the K2 still in TUNE mode, as I slowly dial up the power, suddenly all of the SWR LEDs light. This happens if I start at 1 watt and tune to about 5 watts; and if I start at 10 watts and dial up to about 50 watts. When I hit TUNE at about 1 watt and dial up the power past 9 watts, the SWR LEDS come on at about 5 watts, then I hear a relay click in the KAT100/KPA100 indicating it changed power range at about 9 watts, but the PWR range LED does not flip from low to high and all the SWR LEDs remain lit. I also get erratic HiRFL messages on the K2 display, but not reliably when all the SWR lights come on as I described above. The K2/KPA100/KAT100 currents are normal. Otherwise, the rig seems to perform as it did before this fault appeared. Output power is good, and it all seems to transmit into an antenna that I know is resonant and good on 20 m. What should I check out first? It might help to know that between the time I noticed this problem and the last time I used the rig, there was a thunderstorm in my area. While I normally set my antenna switch to ground the antenna and project my xmitters, I did not do so this time. My coax is grounded with two levels of lightening protection at the house: cheap lightening-arrester connectors outdoors followed by an alpha-delta coax switch with the arc-plug indoors. The arc-plug is not popped, or however you describe it -- it works fine still. Perhaps a lightening pulse of some sort caught something in the SWR section of the KAT100??? Thanks to the community for help with this problem. Doug TRY FREE IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if5 Capture screenshots, upload images, edit and send them to your friends through IMs, post on Twitter®, Facebook®, MySpace™, LinkedIn® – FAST! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] eHam.net forum message
Dick Van Zandt (K9OM) has sent you a forum message for you to review. - start of message - Noisy DSP experiences. Forum: Articles Subject: An Interesting CQ WPX CW Experience The quot;noisy DSPquot; phenomena is well known. Rob Sherwood has also identified this problem and has written about it. I have the following radios K3 K2 Flex5000 IC7700 Perseus ALL the above radios except the K2suffer from the noisy front end problem when mild QRN is around. It sounds like these radios have a reverb unit on the receiver which multiplies static and pulse noise. Elecraft claims to have a cure for this problem, however I still find the receiver noisy. The K2 I prefer over the K3 on CW when there is QRN around. The filters on the K2 sound better on CW when there is QRN about. It amazes me every time that I turn on any of my old old analog radios like the TS830S or the FT1000D and do a comparison. The QRN all of a sudden becomes tolerable and not so nerve wrecking. The TS830S is still my favorite low band radio for picking weak signals out of QRN on 160 and 80 meters. This is especially so when there is a lot static and QRN around. Its unfortunate that there is no current model analog transceiver manufactured that has fantastic receiver dynamic range numbers like the Elecraft K3. The only option available is to build your own like the PA3AKE H-mode mixer high performance receiver. http://www.xs4all.nl/~martein/pa3ake/hmode/ - end of message - You can see this forum message in full at: http://eham.net/forums/Articles/201100 This email was sent to you from Dick Van Zandt (K9OM) through a notification system on eHam.net. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
