Re: [Elecraft] Some OT help with a repeating email on this list
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
Re: [Elecraft] KX-1 S-meter calibration?
Don - Thanks! That works. I didn't really understand what the manual was saying, and I was overcorrecting. 73, Mike, KL7MJ __ 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
Why not? -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Robert Kirkland Sent: Monday, July 12, 2010 7:12 PM To: elecraft@mailman.qth.net Subject: [Elecraft] D104 Mic Am surprised no one mentioned that the D104 was made with two types of elements, crystal, believe they were Rochelle salts or something like that and ceramic. If I remember correctly the ceramic was the D104C, had lower output and could withstand heat and rougher handling. I copied Tom's J310 post and drew a diagram, it looks good and the values check with the J310 specs. Time to get the old D104C back in service. 73's Bob,w5pvr __ 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] KX-1 S-meter calibration?
Mike, To set the KX1 S-meter, first select DISPLAY so the S-meter bars are displayed. Apply no signal for at least 30 seconds to let the capacitor discharge. Then enter the menu for SIG - turn the VFO knob to set the low value. Start with a value of 78, then reduce it 2 numbers at a time until all the bars go out - now increase it by 1 and see if there are still no bars displayed - if so, leave it there, but if there is one bar illuminated (even dimly), reduce the menu number by 1 and leave it there. If you have a signal generator that can produce a known S-9 (-73 dBm or 50 uV) signal, connect it to the antenna jack and tune that signal on the KX1. Set the KX1 for DISPLAY if it is not still in that mode and check the number of bars displayed. If it is 5, that is correct. If not 5, enter the menu and using the right two blue buttons, increase or decrease the single digit number shown. A lower number should increase the number of bars illuminated while a higher number will decrease the number of bars. If you have no generator, set the single digit number to 3. If the S-meter still does not work, then check the AGC circuit. Check D4 for proper orientation and check R5, R20 C53, C8 and Q9 for correct values and good soldering (re-flow the soldering with a hot iron - 750 deg/F - and add just a touch of new flux). Do you have Q9 in properly - the flat side should be facing away from the KX1 board - same for Q2 and Q3. 73, Don W3FPR Mike M wrote: > All - > > I completed my KX-1 last week (still trying to make a QSO) and > everything seems to be working properly, but I can't seem to calibrate > the S meter. I can get it to show two bars constantly, zero bars > constantly, or two flashing bars constantly. There is no change in > bars regardless of how strong a signal it receives. > > I don't know if there is a hardware problem, or I just don't > understand how to do the calibration. Any hints? Thanks. > > 73, > Mike, KL7MJ > __ > 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] K2 10W PA problem
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 Guido Tedeschi wrote: > Tom W8JI wrote: > >> This is almost certainly thermal drift from heat. >> >> Poor heatsinking of transistors will cause this, so make sure he used >> the CORRECT very light amount of any heatsink compound and that the >> transistors are clean underneath and bolted to correct tightness. >> >> Also a very small upward drift in bias voltage will cause this. This >> can be because of leaky series pass bias transistors or bias pass >> transistor heating from inadequate heatsinking. >> >> > Many thanks to Tom and the others: I've noticed that PA transistors are > not installed perfectly horizontal and it is possible that the > mechanical contact with the cover is not so good. > This poor heatsinking can explain the drift but, probably, not the 1.2A > with only 0.5W... Maybe, also the two transistors used for bias voltage > are not so healty... > > __ 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] D104 Mic
Am surprised no one mentioned that the D104 was made with two types of elements, crystal, believe they were Rochelle salts or something like that and ceramic. If I remember correctly the ceramic was the D104C, had lower output and could withstand heat and rougher handling. I copied Tom's J310 post and drew a diagram, it looks good and the values check with the J310 specs. Time to get the old D104C back in service. 73's Bob,w5pvr __ 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] KX-1 S-meter calibration?
All - I completed my KX-1 last week (still trying to make a QSO) and everything seems to be working properly, but I can't seem to calibrate the S meter. I can get it to show two bars constantly, zero bars constantly, or two flashing bars constantly. There is no change in bars regardless of how strong a signal it receives. I don't know if there is a hardware problem, or I just don't understand how to do the calibration. Any hints? Thanks. 73, Mike, KL7MJ __ 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
Tom W8JI wrote: > This is almost certainly thermal drift from heat. > > Poor heatsinking of transistors will cause this, so make sure he used > the CORRECT very light amount of any heatsink compound and that the > transistors are clean underneath and bolted to correct tightness. > > Also a very small upward drift in bias voltage will cause this. This > can be because of leaky series pass bias transistors or bias pass > transistor heating from inadequate heatsinking. > Many thanks to Tom and the others: I've noticed that PA transistors are not installed perfectly horizontal and it is possible that the mechanical contact with the cover is not so good. This poor heatsinking can explain the drift but, probably, not the 1.2A with only 0.5W... Maybe, also the two transistors used for bias voltage are not so healty... Thanks and 73 Guido, ik2bcp __ 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] Squeeze Keyer for K2, K3 ? Final CONCLUSION
All, See http://wilcoxengineering.com/projects/amateur-projects/44-ultimatic-keyer for photos and a summary of the build. Seems like the project was successful getting me close to what I was looking for. Not exactly, but close enough. Thanks for the advice! 73, Alan Alan D. Wilcox, W3DVX (K2-5373, K3-40) 570-321-1516 http://WilcoxEngineering.com Williamsport, PA 17701 Alan D. Wilcox wrote: > All, > Thanks for the leads and advice. I finally selected the K1EL K12-battery > keyer. http://k1el.tripod.com/K12.html for a modest $17. > > From the datasheet, it appears to have not only ultimatic, but > dah-override. When I get it built, I'll find out for sure how it'll work > for me. > > Stay tuned ... I'll post the final results in a few weeks. > > Cheers, Alan > > Alan D. Wilcox, W3DVX (K2-5373, K3-40) > 570-321-1516 > http://WilcoxEngineering.com > Williamsport, PA 17701 > > > Alan D. Wilcox wrote: > >> Hello, >> >> Fifty years ago I designed and built a tube keyer to replace my >> Vibroplex. Then a transistor keyer. All this before the iambic keyers >> came along ... >> >> Left paddle = dots >> Right = dashes >> Squeeze both paddles = dashes only. >> >> The technique I developed was to >> 1. Always squeeze _both_ keys for dashes; if I was a bit late getting >> the dash paddle closed, the logic turned the dot into a dash (as long as >> the dot hadn't finished, of course.) >> 2. If dots followed dashes, just simply let loose of the right paddle. >> 3. A string of dots would turn into dashes simply by squeezing both >> paddles together. >> >> I could send good CW at fairly-respectable speeds, and was happy. For >> decades ... until I got the K2 and the K3. >> >> Then I tried to get the hang of iambic keying, and the best I can do is >> slap-keying or stagger along at 10 wpm or slower iambic. >> >> Questions: >> 1. Is there a way to kludge the K2 or K3 keying logic for squeeze keying? >> 2. Does anyone make a keyer with my logic? WHO? All I've ever seen are >> iambic. >> 3. If neither, and I wind up building my new keyer myself, is this >> something anybody else would want? >> >> Cheers, >> Alan >> __ 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
Pete, If your ISP offers webmail, check there first, it may be stuck in your output queue. Otherwise, it is stuck somewhere in cyberspace en-route to your address. Not much you can do about that condition. The ones I have had went away after a day or two. 73, Don W3FPR Pete Spotts wrote: > Hi Folks, > > I've been receiving an email all day today (now up to 9 copies) related > to the photos from the WRTC. > > Naively, it doesn't look like the sender's problem, because when I look > at the list archives, only one copy of the email shows up there. Yet I > have been receiving duplicates (with the same time signature) all day > long. And it's the only email that's been cloning itself. All others > received from the list have been one-offs, as they should be. > > The phenomenon appears to be independent of email client. I can use any > of three email clients, and they all continue to get copies of this > email. > > Any thoughts as to where I should look? > > With best regards, > > Pete > > __ 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
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] Some OT help with a repeating email on this list
Hi Folks, I've been receiving an email all day today (now up to 9 copies) related to the photos from the WRTC. Naively, it doesn't look like the sender's problem, because when I look at the list archives, only one copy of the email shows up there. Yet I have been receiving duplicates (with the same time signature) all day long. And it's the only email that's been cloning itself. All others received from the list have been one-offs, as they should be. The phenomenon appears to be independent of email client. I can use any of three email clients, and they all continue to get copies of this email. Any thoughts as to where I should look? With best regards, Pete -- Peter N. Spotts -- W1PNS http://www.w1pns.net Email: w1...@arrl.net | Skype: pspotts QCWA #34679 | SKCC #4853T | QRP-ARCI #4174 NEQRP #714 | NAQCC #2446 | WARC-CC #147 __ 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
Thanks. This is what I was looking for. The D104 is a classy looking mic. Dick At 03:46 PM 7/12/2010, Mark - W5EZY wrote: >Does anyone have experience with the amplified D104? > >Dick, KA1SA, #911 > > >Dick, > >If you have a D104 with the original crystal element, you can build the >below amplifier to interface with your K2/3. I did, and it worked great; >had really good "punch" for dxing. I wired it to get power from the K2 for >the amplifier circuit. Check out: http://members.cox.net/n4jk/d104.htm > >Mark - W5EZY > > >-- >View this message in context: >http://elecraft.365791.n2.nabble.com/D104-mic-tp5276371p5284549.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 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
Does anyone have experience with the amplified D104? Dick, KA1SA, #911 Dick, If you have a D104 with the original crystal element, you can build the below amplifier to interface with your K2/3. I did, and it worked great; had really good "punch" for dxing. I wired it to get power from the K2 for the amplifier circuit. Check out: http://members.cox.net/n4jk/d104.htm Mark - W5EZY -- View this message in context: http://elecraft.365791.n2.nabble.com/D104-mic-tp5276371p5284549.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] K3: Now I've heard everything
On Jul 12, 2010, at 7/1210:25 AM, Wes Stewart wrote: > I haven't gotten very far with this because 1) the IMD is apparently > temperature sensitive and drifts, becoming a moving target For what its worth, when I ran close-spaced IMD measurements (*very* closed spaced -- the BPSK31 idle tone :-), I did not notice much drifting in IMD values once I got the "ALC" meter up to 4 to 5 bars. The transmit IMD will vary a little (I saw 2 dB) depending on the input drive, even while maintaining a constant 5 bars on the "ALC" meter. But the reading was stable as long as I kept the drive stable. Also, are you systematically tapping the signal from the dummy load? If you are just using a short pickup wire on the antenna port of the SQR-IQ, you could be seeing other artifacts. I had used Elecraft's directional coupler kit (no one should be without one :-) plus oodles of attenuation to directly feed the measurement receiver. 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
Re: [Elecraft] continuous relay click in RX ANT IN
Accumulate? So assuming there is 5 volts AC across that bulb, you could install 22 more of these antennas, connect them in series and get 110VAC. This would take the place of our solar cells after sundown! Steve N4LQ - Original Message - From: "Tom W8JI" To: "Vic K2VCO" Cc: Sent: Monday, July 12, 2010 1:06 PM Subject: Re: [Elecraft] continuous relay click in RX ANT IN > Hi Vic, > >> So the voltage produced by the receiving antennas is relatively low. I >> agree that it wouldn't work with a resonant antenna. > > On my Beverage antennas (which are low gain) the accumulation of AM BC > signals, SW BC signals, and so on at night is enough to light the filament > of a 12 volt subminature lamp a dull reddish glow!! Really freaky to watch > the filament brightness QSB up at night. > >> But couldn't you just put several diodes in series, like this: >> >> --+-->|-->|---+-- >> |--|<--|<---| >> if you want a higher clipping level? > > You could, but I probably would not do that for several reasons (mostly > related to IM performance and clamping harness). A much better solution is > to use a zener-biased shunt clamp with fast diodes and a low current fuse > made from a small low voltage lamp, but a voltage source is required to > bias > the zener. > > __ > 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: Now I've heard everything
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
Re: [Elecraft] continuous relay click in RX ANT IN
Hi Vic, > So the voltage produced by the receiving antennas is relatively low. I > agree that it wouldn't work with a resonant antenna. On my Beverage antennas (which are low gain) the accumulation of AM BC signals, SW BC signals, and so on at night is enough to light the filament of a 12 volt subminature lamp a dull reddish glow!! Really freaky to watch the filament brightness QSB up at night. > But couldn't you just put several diodes in series, like this: > > --+-->|-->|---+-- > |--|<--|<---| > if you want a higher clipping level? You could, but I probably would not do that for several reasons (mostly related to IM performance and clamping harness). A much better solution is to use a zener-biased shunt clamp with fast diodes and a low current fuse made from a small low voltage lamp, but a voltage source is required to bias the zener. __ 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] Non-amateur radio products.
On Mon, 12 Jul 2010 08:35:42 -0700, "Eric Swartz - WA6HHQ, Elecraft" wrote: >From the late 60's through mid 80's my father, Warren Childers manufactured electronic equipment for the graphic arts industry at Graphic Arts Manufacturing in Houston, Texas. In the late 70's the U.S. Government asked him to bid on a contract for one hundred of his Densitometer products. My father told them that he was not interested in any contracts with the U.S. Government which required enormous amounts of paperwork and specifications, but they could buy the products over the counter at his distributors the same as any other person or business could do. The U.S. Government bought the 100 densitometers from the distributors and each year after that they would send him lists of spare parts with the instructions as to how to bag and label them. He pulled all of the requested parts from stock, stuck them in a single plastic bag and shipped them COD. I hope you will take the red tape and interference of U.S. Government into consideration before going into contracts with them. Tom Childers N5GE Antenna 4507 Branchview Drive Arlington, TX 76017 n...@n5ge.com http://www.n5ge.com >We're not currently doing anything in these areas. I can;t say what will >happen in the future. > >73, Eric WA6HHQ > > >On 7/12/2010 3:05 AM, KU5Q wrote: >> Will Elecraft ever produce any products for the military or commercial radio >> services? >> [snip] __ 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] Elecraft SSB Net Results (7-11-10)
Snip: Ah, the vagaries of propagation! I tuned in to check into the net but I could barely hear net control deep in the noise, and few of the responding stations. I live 80 miles west of one of the California stations that checked in and 80 miles north of he other, but I might as well have been on the back side of the moon. End snip Hi Lew. All bands and nets suffered from low propagation at this QTH (Oceanside, CA) yesterday. I've noticed though that when Phil points his quad south, the situation improves. Maybe your location offers a similar challenge. With the propagation situation it's hard to differentiate between long period QSB and antenna rotation. In which case, I had a tendency to move on. But lately I have been able to wait and catch Phil's signal when he swings south. The CW nets also were too noisy for me to use, but then again I have a stealth wire antenna. Also, I doubt that Kevin can rotate his 40 M ant! Hi. 73, Fred, AE6IC __ 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] D104 memories
Thanks for sharing your memories of d104 and your early days of operating. I like hearing those. May be off topic but I enjoy them just the same. Happy QSO'ing. Mike R Sent from my pocket communicator __ 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: Noise reduction tutorial/primer available?
Some of you were interested in what the Filters and such did on the K3 so I wrote this little bit of information up to help you out. I hope you find it useful. If you have any questions feel free to ask off the reflector. Thanks; In brief: Notch: The Notch has an Auto (for SSB use) and a manual setting for CW. This can be used to take out a tone (carrier) or other noise that is sitting in the middle or near your pass band area (the freq. you're listening to). It can also be used in CW mode to reduce the amount of noise you hear in the upper or lower part of the pass band area. Setting it up to do this takes SOME understanding of what a notch filter does, and how to adjust it. You may not hear any difference between having it on, and off depending on the noise, and on the settings that you have selected. Along with turning it on you also have to adjust the Freq. manually when using it in CW mode. Sometimes Notching out (CUTTING out) a selected signal can help with reception. For example if you are on CW and you have a lot of LOW end rumbling in headphones and you want to get rid of it, depending on your PITCH freq. you can turn on the NOTCH filter and set it to 300Hz for example. This will NOTCH out (cut out) all of the sound on and around the 300Hz freq. area. One thing you have to watch out for is setting the Notch freq in the menu to match, or come too close to your PITCH freq. If you do you will have essentially Notched out your Target freq that you're listening for. Not good. NR: The NR is used to reduce noise. As you've noticed it has settings as well. Settings 1-1 through 4-1 are normally used with CW, because of the "long hallway" effect that you've already experienced on SSB. Settings 5-1 through 8-4 are generally used with SSB because they don't tend to cause this kind of effect on the voices. You should always try to use the LEAST (or lowest) NR value you can IE 5-1 or 1-1... If it helps at 1-1 and is good enough, there is no need to process more than you need. Too much of ANYTHING is a bad thing. Even though it wasn't mentioned in the original question, the RF gain is another one of your BEST noise reducing tools you have... When used in conjunction with the NR filter, if you reduce your RF gain down to 4 or even 5 bars on the scale when the nose on 40 is 4 bars high (as you indicated it was) you will notice that your NR works exponentially better! This is because the DSP no longer has to process nearly as much noise along with signal. Don't worry, you will find that even when you turn the RF gain down on a signal that is S5 along with an S4 (4 bars) noise level you will NOT make the signal you're listening for go away. Just turn it down slowly as to hear when the person starts to get too low. If you start reducing their signal by more than the NR is reducing your noise level you know you've gone too far. You'll have to play around with this one some.. It's all about technique. Keep in mind that it may take 10 seconds or so before your NR starts to clean up the noise as you drop the RF gain, so try only dropping it as much as 1 bar less than the noise level at first, if you need to drop the RF gain lower then go ahead and then listen again for a few second more. NB: The NB generally works for Electrical noise and other pulsing type noises... You have already noticed that when you turn it on it can drop your S meter by as much as 1 S unit. With the proper settings (DSP/IF) you may be able to get that down to as much as 3 S units (bars) of noise reduction. However, keep in mind, with the reduction of noise with this method you will also have adverse affects on the signals you're trying to listen to. Such as a clicky sound on the CW tones, or flutter on a voice. Again, like the NR you always want to use as little as you can get away with. Starting with the lower numbers for DSP, and the Narrow modes for IF. Just for a starting spot, in my area I find that 2-5 with Med 2 seems to work very well at reducing the QRM/QRN. However, if I move it to 2-7, Med 2 I find that the noise level drops down 3 bars, but trying the have a QSO with a weak station is almost impossible. As well as the noise it tends to "remove" the sender as well. Try NOT to use your S meter as your gauge of where you should have your NB set to. For example, Turn off the IF NB, start with the DSP (because this seems to work best at removing noise) Next, Close your eyes and start to VERY slowly turn the DSP part of the NB starting at the lowest number (setting). LISTEN to when the noise is reduced to your satisfaction. It may take some going back and forth to get this right, or even hear a difference. When you are done, if you are not completely satisfied with the noise reduction continue this process using the IF part of the settings. Keep the DSP portion exactly where you found it to work best. When you find the best IF noise reduction you will have your
Re: [Elecraft] D104 mic 50 cent solution...
On Mon, 12 Jul 2010 10:22:06 -0400, Bill NY9H wrote: >I'd think that way to go would be to put a $ .50 electret capsule or It worked for Bob Heil! 73, Jim K9YC __ 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
You are correct. In my case, I am using a ferrite loop on 160 and a short vertical on high bands to provide a second channel for polarization-diversity reception. The main antennas are a vertical on 160, and full size dipoles and a beam on the other bands, which of course I use for transmitting. So the voltage produced by the receiving antennas is relatively low. I agree that it wouldn't work with a resonant antenna. But couldn't you just put several diodes in series, like this: --+-->|-->|---+-- |--|<--|<---| if you want a higher clipping level? On 7/12/2010 6:37 AM, Tom W8JI wrote: >> I made an even more cost-effective one: I put a couple of diodes in >> parallel (anode to >> cathode) across the connector in the old coax switch I use for >> receiving antennas. I wrote >> "FOR RECEIVE ONLY!" on the switch in big letters. > > I can't do that here Vic because on most of my antennas the net power > from the antennas results in a peak voltage much greater than 0.5 volts. > > .5 volts peak, which is the approximate conduction limit of a silicon > rectifier like a 1N4007, is only 4 dBm That will turn your K3 into a > Yaesu FT-101 for IM and even order performance. > > 73 Tom -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ 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] Ameco PT-3
Tom, Thanks for your comments. I appreciate your taking the time to answer my posting. I have great admiration for you, having been in the 'biz most of my life www.radions.net/comrcial.htm . 73. TR, K6GC, the Great Circle Station in the State of Jefferson. http://www.ijpr.org/Page.asp?NavID=1033 At 09:58 AM 7/12/2010 -0400, you wrote: >>When the antenna is connected and disconnected the noise floor >>moves just barely. You can tell, but it requires a critical ear. > >That is too little. That is about how my K3 behaves on six meters on >SSB bandwidth! On the narrowest bandwidth you use, you should hear a >very well defined noise increase, several dB, going from a dummy >load to the antenna. > >>>A note about my antenna. It is a HyGain 5BDQ trap dipole and the >>>SWR on it is 1.2:1 into about 200' of LMR240. > >Since feedline loss and SWR in receiving is set by the receiver, SWR >in the feedline on receive has nothing to do with transmit VSWR >(where the antenna is the load). I've never measured the input >impedance of the K2, but it could be you have an impedance mismatch >between the K2 receiver and the feedline, which would result in >feedline losses aggravating the feedline loss problem. > >What the 1.2:1 SWR indicates is the antenna mismatch is around 1.4:1 >and feedline loss on transmitting is about 2.5 dB. > >I have no idea what the K2 looks like for SWR on receiving, but many >receivers I've measured are pretty far off 1:1 SWR. If the K2 looks >like a 2.5:1 SWR (which is a reasonable upper limit based on other >receivers I have tested), feedline loss would be 3 dB plus you would >have an additional .12 dB mismatch loss at the antenna (the source). > >Sounds to me like the K2 you have needs more sensitivity if a dipole >with 4 dB or less system loss won't firmly set noise floor. > >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] Non-amateur radio products.
We're not currently doing anything in these areas. I can;t say what will happen in the future. 73, Eric WA6HHQ On 7/12/2010 3:05 AM, KU5Q wrote: > Will Elecraft ever produce any products for the military or commercial radio > services? > __ 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
On 7/12/2010 4:19 AM, Pete Smith wrote: > It's a good thing we contesters are smart and nice folks, cuz we sure > aren't pretty. Actually, my opinion on looking at the pictures was "look at all those youngsters among the Russians and Europeans!" Of course, for me a youngster is anyone under 50, but still... you won't see many of them at a US event. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ 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 50 cent solution...
I'd think that way to go would be to put a $ .50 electret capsule or one swapped from an old telephone set ( you know the junkers) that used an electret ,.,,, set the bias on, tweak up the EQ IF preferred,,,and have a great sounding d-104... I put one in front of a dynamic cartridge in one of my old AKGs, not acoustically correct but worked great for ssb... and had dual outputs ... one dynamic and one hot electret bill/3 __ 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
Here is a very major problem people with slopers should watch for. The sloper uses the tower as the counterpoise, and the tower structure has the same current at the connection point as flows into the sloper wire we call the antenna! If we have three amps of RF into the sloper, the tower is excited with 3 amps also!!! This means the 40 meter antenna on the tower, since it is a major part of the counterpoise for the sloper antenna to work against, has substantial element currents when using the sloper. I would use a disconnect relay with good isolation to disconnect and ground the center conductor of the 40 meter Yagi when using your sloper to transmit! Remember the 40 meter antenna is really a radial system for the sloper. This is a very good way to damage a receiver, and the little "low power" limiters that are often successful for minor problems should not be trusted in a case like this where one antenna is a directly connected part of the other antenna system. Years ago I measured the 80 meter Inverted V of a friend of mine who had a 160 sloper on the same tower, and he had almost 200 or 300 watts into a dummy load on the 80 meter antenna when using the sloper at 1500 watts on 160. Use a relay Jorge along with a regular small limiter and be sure it is 100% safe to be disconnected before transmitting with a limiter for backup. 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] continuous relay click in RX ANT IN
> .5 volts peak, which is the approximate conduction limit of a silicon > rectifier like a 1N4007, is only 4 dBm That will turn your K3 into a > Yaesu FT-101 for IM and even order performance. Reminds me of my first Field Day in 1975 while in high school. Multiple stations, one per band, no amps. We couldn't understand why an incandescent lamp on the back panel of my friend's FT-101B was glowing brightly when stations on other bands were operating. As I recall, we had a reasonable distance between antennas. Of course, the lamp was there for overload protection and it didn't take much RF coupled back to the antenna to activate it. The FT-101B was absolutely unusable for FD. Being new into this at the time, we had not let discovered stub and filtering concepts but it was an important learning moment. Looking back, I cannot think of a receiver I've used that had poorer overload performance than the FT-101. For us K2/K3 owners, glad those days are long gone... Paul, W9AC __ 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] Elecraft SSB Net results (7-11-10)
I checked in late. Almost forgot about it. First time for me. I usually have a church conflict. NCS was 5X9 here in Phoenix AZ. 73, John N1JM K3 #2555 -- View this message in context: http://elecraft.365791.n2.nabble.com/SSB-Net-results-1-18-09-tp2178850p5283020.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
Re: [Elecraft] Ameco PT-3
> When the antenna is connected and disconnected the noise floor moves just > barely. You can tell, but it requires a critical ear. That is too little. That is about how my K3 behaves on six meters on SSB bandwidth! On the narrowest bandwidth you use, you should hear a very well defined noise increase, several dB, going from a dummy load to the antenna. >>A note about my antenna. It is a HyGain 5BDQ trap dipole and the SWR on >>it is 1.2:1 into about 200' of LMR240. Since feedline loss and SWR in receiving is set by the receiver, SWR in the feedline on receive has nothing to do with transmit VSWR (where the antenna is the load). I've never measured the input impedance of the K2, but it could be you have an impedance mismatch between the K2 receiver and the feedline, which would result in feedline losses aggravating the feedline loss problem. What the 1.2:1 SWR indicates is the antenna mismatch is around 1.4:1 and feedline loss on transmitting is about 2.5 dB. I have no idea what the K2 looks like for SWR on receiving, but many receivers I've measured are pretty far off 1:1 SWR. If the K2 looks like a 2.5:1 SWR (which is a reasonable upper limit based on other receivers I have tested), feedline loss would be 3 dB plus you would have an additional .12 dB mismatch loss at the antenna (the source). Sounds to me like the K2 you have needs more sensitivity if a dipole with 4 dB or less system loss won't firmly set noise floor. 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] continuous relay click in RX ANT IN
>I made an even more cost-effective one: I put a couple of diodes in >parallel (anode to > cathode) across the connector in the old coax switch I use for receiving > antennas. I wrote > "FOR RECEIVE ONLY!" on the switch in big letters. I can't do that here Vic because on most of my antennas the net power from the antennas results in a peak voltage much greater than 0.5 volts. .5 volts peak, which is the approximate conduction limit of a silicon rectifier like a 1N4007, is only 4 dBm That will turn your K3 into a Yaesu FT-101 for IM and even order performance. 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] D104 mic
> Does anyone have experience with the amplified D104? > > Dick, KA1SA, #911 I cut those boards out of mine, except for the PTT switch mounting. I prefer something more simple and easily controlled. __ 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
This is almost certainly thermal drift from heat. > seem OK, the power from driver and the power output remain stable > during key-down, but the current increases... > What could be the issue? > Before spending more time on troubleshooting, has someone had and > solved the same problem? Poor heatsinking of transistors will cause this, so make sure he used the CORRECT very light amount of any heatsink compound and that the transistors are clean underneath and bolted to correct tightness. Also a very small upward drift in bias voltage will cause this. This can be because of leaky series pass bias transistors or bias pass transistor heating from inadequate heatsinking. __ 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 had a similar problem with a HiCurr a couple years back working on a friends K2. The problem turned out to be R67, a 2% tolerance (blue) resister that controls feed back to the RF power control; which was burned for some reason. I replaced it and fixed the problem. If the noise blanker is installed this resistor will be hard to see because it sits under it. I did not have a problem with increasing current, but it is worth a quick look just to make sure this is not the problem. Best of luck! 73, Kevin KG4TEI On Mon, Jul 12, 2010 at 4:28 AM, Guido Tedeschi wrote: > A friend asked to me to repair his K2 10W which has a strange problem: > too high current in TX (1.2A even with 0.5W) and current that > increases during key-down until HiCurr protection. > Already changed the 2 x 2SC1969 PA transistors and re-winded the > output transformer, but nothing changed: the voltages on PA and driver > seem OK, the power from driver and the power output remain stable > during key-down, but the current increases... > What could be the issue? > Before spending more time on troubleshooting, has someone had and > solved the same problem? > Thanks and 73 > Guido, ik2bcp > __ > 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] K2 10W PA problem
Guido, Did you also change Q11 and Q13? What I suspect is that the bias is incorrect, and increases during keydown causing the current draw by Q7 and Q8 to increase. Often Q11 and Q13 are damaged by a PA transistor failure, and if they are not changed, they will in turn damage the replacement Q7 and Q8. Where did you obtain the 2SC1969 transistors? I have heard reports of Chinese transistors that do not meet specification and fail quickly. Currently, the only source of 2SC1969 transistors that I trust is those at Elecraft - order K2PAKIT, it includes the PA transistors, replacements for Q11 and Q13 as well as R50 if needed, along with mounting hardware for the PA transistors. 73, Don W3FPR Guido Tedeschi wrote: > A friend asked to me to repair his K2 10W which has a strange problem: > too high current in TX (1.2A even with 0.5W) and current that > increases during key-down until HiCurr protection. > Already changed the 2 x 2SC1969 PA transistors and re-winded the > output transformer, but nothing changed: the voltages on PA and driver > seem OK, the power from driver and the power output remain stable > during key-down, but the current increases... > What could be the issue? > Before spending more time on troubleshooting, has someone had and > solved the same problem? > Thanks and 73 > Guido, ik2bcp > > __ 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
You say the power output stays the same. Is this into a dummy load and measured with a good RF watt meter (like Bird)? If that is the case then due to power staying the same, the resistance the PA sees must be decreasing. Is this happening on all bands or just one or two? This could be related to the LPF causing it if only one or two, need to check those items in the LPF causing it. If it is all bands, I would check the items on the output side of T2 for correct value and soldering. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-10W-PA-problem-tp5282243p5282647.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
Re: [Elecraft] K2 low pre-driver
Robert, Compare the RF voltage at the base of Q5 - you can reach the base at the end of R40 or R41 - and compare that with the Pre-Driver output at the anode of D1. If they are not substantially the same, check C107, it is the only component between those two points. It is strange that you do not have higher than the "expected" RF voltages at the early stages. Normally when there is low power output, the RF voltages for the working stages up to the point of failure are at maximum because the microprocessor is trying to increase drive in an attempt to bring the power up. Are you using the indication on the K2 display to determine the power output? Or are you using an external meter? If you are using an external meter, what does the K2 display indicated for power out during a tune? What I am wondering is if the problem is in the output detection circuit. 73, Don W3FPR Robert Greenwalt wrote: > Thanks for the suggestions Don, > > Everything checked out. > > The collector was 13.7 not transmitting and dropped to 12.0 when > transmitting. > R40 was 0V not trans, 1.2V trans. > Resistance of Q5 emitter was 26.6 ohms. > R42 and 43 had the right markings - I reflowed the solder. > I checked all those caps and reflowed their solder. > > I put the heatsink back on and there was no change. The Q5 collector was > still off by a factor of 2 (.072 Vrms measured, .13 expected). > > Any other ideas? > > Robert K6RJG > > On Sun, Jul 11, 2010 at 3:04 PM, Don Wilhelm wrote: > > >> Robert, >> >> OK, the Pre-driver output is low - next step is to check the DC voltages >> for Q5 - but that must be done during transmit. It is difficult (almost >> impossible) to check the emitter without removing the heat-sink. WARNING - >> even though the power output is low, do not operate the K2 without the >> heatsink attached. >> So during transmit, check the collector voltage - should be close to 12.4 >> volts >> And check the base voltage which can be reached at the end or either R40 or >> R41 - should be 1.3 volts. >> If all was well for those checks, remove the heatsink and measure the >> resistance between the emitter of Q5 and ground - if it is more than 27 >> ohms, check the values of R42 and R43 and check their soldering. >> If the resistance was correct, check the value of C117 (should be .047 uF) >> and reflow its soldering. Also check C116 (33 pF), C118 (.01 uF) and C115 >> (.01) and reflow the soldering for those too. Then put the heat sink back >> on and see if there is any change. >> >> BTW - you can consider the division between the pre-driver and the driver >> as being between the primary and the secondary winding of T1. >> >> 73, >> Don W3FPR >> >> Robert Greenwalt wrote: >> >> >>> Hi, >>> >>> When doing the 40-Meter Transmitter Alignment, I couldn't keep the output >>> power in th 1-2 watt range. Turning the power all the way up only got up >>> to >>> .7 watts. I checked the output across the dumy load and it was >>> practically >>> non-existent (.007Vrms) though key-down was noticeably different than >>> key-up. >>> >>> I walked through the Transmitter signal tracing. Everything was within >>> tolerances until I got to the pre-driver output. I expected about >>> .132Vrms >>> but got .07 Vrms. >>> >>> I've checked all the components in the pre-driver section up through T1 >>> (not >>> sure where pre-driver ends and driver begins) and they all have the right >>> markings. I verified T1 and reheated the connections. >>> >>> On qth.net I only found references to high pre-driver issues. >>> Suggestions? >>> >>> Transmit mixer output: .016 Vrms >>> Buffer output: .216 Vrms >>> Bandpass filter output: .035 Vrms >>> TR switch output: .033 Vrms >>> >>> Predriver output: .072 Vrms (expected .13 ) >>> >>> Robert, K6RJG >>> __ >>> 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 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
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] K3/QSK Master/Microkeyer II
Hi Folks, Anyone else using this combination: K3, QSK Master, Microkeyer II? Please contact me offline (I have a couple setup questions); thanks. --Ed-- __ 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] Non-amateur radio products.
Will Elecraft ever produce any products for the military or commercial radio services? -- View this message in context: http://elecraft.365791.n2.nabble.com/Non-amateur-radio-products-tp5282321p5282321.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] K2 10W PA problem
A friend asked to me to repair his K2 10W which has a strange problem: too high current in TX (1.2A even with 0.5W) and current that increases during key-down until HiCurr protection. Already changed the 2 x 2SC1969 PA transistors and re-winded the output transformer, but nothing changed: the voltages on PA and driver seem OK, the power from driver and the power output remain stable during key-down, but the current increases... What could be the issue? Before spending more time on troubleshooting, has someone had and solved the same problem? Thanks and 73 Guido, ik2bcp __ 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
