Re: [Elecraft] Building Time for KPA 100
On Aug 24, 2006, at 2:52 PM, Joerg Tack wrote: I am wondering about the building time for the KPA-100 for an experienced builder. For me, the KPA-100 was one of the easier kits to build. Seems I remember the build time being less than 15 hours. How many hours would it take to assemble & test the KPA-100 assuming no major flaws introduced by the builder (= myself)? My experience was that the amplifier went together and just worked with no troubleshooting. If you can build the K2, you can easily build the KPA-100. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] QRP Contact
I hear N5PHT on 40M most mornings near sunrise during my commute here on Cape Cod (Massachusetts). I believe he runs a 2 element yagi at 85 feet, so if you worked him on 40M, that probably helped a bit :-) - good DX, probably grayline, for sure! Hmm. I've been thinking that I need to get up earlier. I'm trying to complete QRP WAS before the end of the year; I've filled in most of the western US but have lots of those little States to reach yet! Condx at night are often good - I hear W4NJ and N5BP regularly from FL - but I suspect most ops are asleep by the time I get the K2 warmed up... 73 de chris K6DBG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Hamfests in FL, GA, CA and more
Upcoming Hamfests with Elecraft booths! Join us for an exciting 2006 fall Hamfest season. 1. Sept 22-24. ARRL SW in San Diego CA- Elecraft will have a booth (#40) with product for sale and lots of built items to view. Both Wayne and Eric will be in attendance and Wayne will be giving a talk on High-Density Design: An Inside Look at the KX1 4-band HF Transceiver. 2. Oct 13-15 Pacificon San Ramon CA- we will all be there- come and see us! We will even have a few things to for sale! 3. Oct 13 Melbourne Hamfest in Melbourne FL. The Elecraft table will be hosted by our terrific Elecraft enthusiasts who will be showing off their built Elecraft rigs as well as a some of their own products whic compliment our radios. They will not be selling Elecraft products at the booth, but you can see the transceivers up close and personal! Contact Doug Shields,[EMAIL PROTECTED] if you would like to spend time at the booth. 4. Nov. 4-5 Stone Mountain Hamfest, Stone Mountain GA Our enthusiasts will once again be there for Elecraft. If you would like to help out at either Melbourne or Stone Mountain, they would love to have your rigs, knowledge and time to share with the participants. You can email me directly and I will put you in touch with the organizers. It is really fun and you'll end up with an Elecraft shirt to boot! Want to host an Elecraft Hamfest booth in your area? Elecraft will pay for the booth, supply literature and a banner as well as a thank you gift (usually a shirt) if you are willing to organize or work the table. Just email [EMAIL PROTECTED] and let me know the dates, size of the Hamfest and we will get the ball rolling. There is no selling or handling of money, just bragging rights for building and showing off your accomplishments. Everyone has a good time doing what Hams like best- talking about Ham radio! Thank you all for your continued support of our products and Hamfest programs. Our success is all about you. Lisa ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 RF Speech Processor?
I asked this question about 1.5 years ago and still have not heard from anyone with real experience... Has anyone tried any of the DF4ZS RF speech processors (http://jwm.de/afu/index0.htm) with a K2 yet? For those who think the SSB "punch" is a little weak, maybe this would help. In fact, maybe this would be a good Mini-Module Kit. 73, Henry - K4TMC K2/100's 3137 and 4796 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 I think not!
You could be right, Gregg, but remember: 2 + 1 + 1/2 + 1/4 + ... = 4. So the ultimate rig (given infinite time & rigs) must be a -K4-. :-P Mike ab3ap Gregg R. Lengling wrote: > With all the recurring talk of the possibilty of a K3I think some > history is missing. First we had the K2, then the K1, then the > KX1...which leads me to believe the next product would be a K 0.5 (or > 1/2) or a K?1right??? > Gregg R. Lengling, W9DHI, Retired > K2/100 SN 3075 > http://www.milwaukeehdtv.org > http://forums.ham-radio.ch/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Problem with 17m band in K2 + KAT100/KPA100 in EC2
Marcin, Now that you know where to look for the origin of the problem, I am confident you will correct it. Stray RF does many strange and unexpected things. 73, Don W3FPR > -Original Message- > > Don, > > Yes, yes, you are right! - it is caused by stray RF. > > I attached counterpoise wire cut for a quarterwave on 17 meters and it > resolve the problem. > Now, with your help, I'm sure that my K2 and KAT100/KPA100 are OK and > my problem is antenna. So, I must go to the roof, recheck antenna > connections and realign it. > Thank you again for your help! > > 73, > > Marcin SQ2AF > > K2 #5408 > > > > 2006/9/8, Don Wilhelm <[EMAIL PROTECTED]>: > > Marcin, > > > > I checked the RigExpert specifications, and while they claim > isolation on > > the soundcard connections, they do not make any such claims for > the digital > > connections (to the PTT, CW Key, or AUX I/O). > > > > So you still may have a problem with RF getting onto the > RigExpert or the > > computer chassis ground that is being then transmitted into the K2. > > > > This is not a problem with your connections, but it may be a > problem with > > the RigExpert on your K2 in combination with your antenna > situation. I am > > not yet convinced that it is a KPA100 problem. > > > > If you can test it with the KPA100 working into a dummy load, > that would be > > of interest, but it may be hard to detect if your receive is > desensitized > > with the dummy load connected. > > > > If you do not have the K2 mic jack shell grounded, you could > try doing that > > as a first measure of defense. > > > > The other thing you can try is attaching a counterpoise wire cut for a > > quarterwave on 17 meters to the KAT100 ground. The far end may > carry a high > > RF voltage, so keep it clear of human and pet contact (the far > end connects > > to nothing - just an insulator). If a counterpoise wire corrects the > > problem then you can be certain it is caused by stray RF - > unfortunately, if > > it does not cure it, stray RF could still be the problem, but > it is worth a > > try - a piece of wire an electrical quarterwavelength on 17 meters is > > approximately 3.9 meters long. > > > > 73, > > Don W3FPR > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 I think not!
With all the recurring talk of the possibilty of a K3I think some history is missing. First we had the K2, then the K1, then the KX1...which leads me to believe the next product would be a K 0.5 (or 1/2) or a K?1right??? Gregg R. Lengling, W9DHI, Retired K2/100 SN 3075 http://www.milwaukeehdtv.org http://forums.ham-radio.ch/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Problem with 17m band in K2 + KAT100/KPA100 in EC2
Don, Yes, yes, you are right! - it is caused by stray RF. I attached counterpoise wire cut for a quarterwave on 17 meters and it resolve the problem. Now, with your help, I'm sure that my K2 and KAT100/KPA100 are OK and my problem is antenna. So, I must go to the roof, recheck antenna connections and realign it. Thank you again for your help! 73, Marcin SQ2AF K2 #5408 2006/9/8, Don Wilhelm <[EMAIL PROTECTED]>: Marcin, I checked the RigExpert specifications, and while they claim isolation on the soundcard connections, they do not make any such claims for the digital connections (to the PTT, CW Key, or AUX I/O). So you still may have a problem with RF getting onto the RigExpert or the computer chassis ground that is being then transmitted into the K2. This is not a problem with your connections, but it may be a problem with the RigExpert on your K2 in combination with your antenna situation. I am not yet convinced that it is a KPA100 problem. If you can test it with the KPA100 working into a dummy load, that would be of interest, but it may be hard to detect if your receive is desensitized with the dummy load connected. If you do not have the K2 mic jack shell grounded, you could try doing that as a first measure of defense. The other thing you can try is attaching a counterpoise wire cut for a quarterwave on 17 meters to the KAT100 ground. The far end may carry a high RF voltage, so keep it clear of human and pet contact (the far end connects to nothing - just an insulator). If a counterpoise wire corrects the problem then you can be certain it is caused by stray RF - unfortunately, if it does not cure it, stray RF could still be the problem, but it is worth a try - a piece of wire an electrical quarterwavelength on 17 meters is approximately 3.9 meters long. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Fire Sale
Thanks to all who responded. The archive provided a wealth of information on this well-known problem. I spoke with Scott at Elecraft and he is sending me a nylon screw. He told me that there had been a Builder's Alert on this problem in the past, but he was also unable to find it on the web site. He told me it would be reposted there, which I imagine will be of help to people with older KX1's, especially second hand owners. As always Elecraft shows that it's commitment to its customers is unparalleled in the industry. Now where's the K3? Paul N8NOV Houston ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Problem with 17m band in K2 + KAT100/KPA100 in EC2
Marcin, I checked the RigExpert specifications, and while they claim isolation on the soundcard connections, they do not make any such claims for the digital connections (to the PTT, CW Key, or AUX I/O). So you still may have a problem with RF getting onto the RigExpert or the computer chassis ground that is being then transmitted into the K2. This is not a problem with your connections, but it may be a problem with the RigExpert on your K2 in combination with your antenna situation. I am not yet convinced that it is a KPA100 problem. If you can test it with the KPA100 working into a dummy load, that would be of interest, but it may be hard to detect if your receive is desensitized with the dummy load connected. If you do not have the K2 mic jack shell grounded, you could try doing that as a first measure of defense. The other thing you can try is attaching a counterpoise wire cut for a quarterwave on 17 meters to the KAT100 ground. The far end may carry a high RF voltage, so keep it clear of human and pet contact (the far end connects to nothing - just an insulator). If a counterpoise wire corrects the problem then you can be certain it is caused by stray RF - unfortunately, if it does not cure it, stray RF could still be the problem, but it is worth a try - a piece of wire an electrical quarterwavelength on 17 meters is approximately 3.9 meters long. 73, Don W3FPR > -Original Message- > > Thank you for patience and fast replays. > > As my digital interface I'm using RigExpert and cable connection as on > the www.mixw.net/RigExpert/cable-elecraft-001.gif > After received your last reply I have been examined cable connections > and they are as on the diagram. > I have been checked RigExpert and K2 with my laptop computer also - > the problem also occurred. It means that my home computer is OK. > But there is interesting thing - when I setup 10W (KPA100 is still in > bypass mode) there is no problem, but when I setup 11W or more (KPA100 > is on) problem occur. > So maybe the problem is somewhere in KPA100? > > 73, > > Marcin SQ2AF > > K2 #5408 > > > 2006/9/8, Don Wilhelm <[EMAIL PROTECTED]>: > > Marcin, > > > > As a guess, your computer connections or even the computer itself may be > > picking up RF. > > > > Are you listening to the audio on the K2 speaker, or just > observing it on > > the computer display (or listening to it on the computer > speakers? If you > > are seeing the drop in audio only on the computer, it may be > the computer at > > fault and not the K2. > > > > If you do not have ground isolation between your computer and > the K2, that > > may be necessary. That means transformers in the audio lines to the > > soundcard and an optoisolator in the RTS to PTT line. Be > careful about how > > the optoisolator is powered so you do not negate the careful grounding > > isolation that you would do otherwise. > > > > There is a good schematic for proper isolation of the computer and > > transceiver grounds in Jan 2006 QST, page 60 (you need only consider the > > part in the shaded box). Note carefully the grounding to the > enclosure does > > not extend to the computer - if you have jacks for the > soundcard connections > > mounted on a metallic box, that would destroy the ground isolation - you > > must either avoid audio jacks at the enclosure or if jacks are > used, they > > must be mounted on an insulator. > > > > 73, > > Don W3FPR > > > > > > > -Original Message- > > > > > > Don, > > > > > > Today I have checked all connections in KPA100 T-R switch - > they was OK. > > > After connection checking I assembled KPA100/KAT100 again and started > > > TX on 17 m again - the problem still occurred. > > > But as you know I'm digi modes fan so, all the TRX keying was > > > made by computer. Today, when I have been use VOX or foot switch the > > > problem disappeared! > > > In this moment I know, the problem occurs only when computer > > > control K2 keying. > > > So, it clears why TUNE coming back RX to normal sensitivity. > > > Do you know what can I do now? > > > > > > 73, > > > Marcin SQ2AF > > > > > > K2 #5408 > > > > > > > > > > ___ > > Elecraft mailing list > > Post to: Elecraft@mailman.qth.net > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.405 / Virus Database:
Re: [Elecraft] Problem with 17m band in K2 + KAT100/KPA100 in EC2
Don, Thank you for patience and fast replays. As my digital interface I'm using RigExpert and cable connection as on the www.mixw.net/RigExpert/cable-elecraft-001.gif After received your last reply I have been examined cable connections and they are as on the diagram. I have been checked RigExpert and K2 with my laptop computer also - the problem also occurred. It means that my home computer is OK. But there is interesting thing - when I setup 10W (KPA100 is still in bypass mode) there is no problem, but when I setup 11W or more (KPA100 is on) problem occur. So maybe the problem is somewhere in KPA100? 73, Marcin SQ2AF K2 #5408 2006/9/8, Don Wilhelm <[EMAIL PROTECTED]>: Marcin, As a guess, your computer connections or even the computer itself may be picking up RF. Are you listening to the audio on the K2 speaker, or just observing it on the computer display (or listening to it on the computer speakers? If you are seeing the drop in audio only on the computer, it may be the computer at fault and not the K2. If you do not have ground isolation between your computer and the K2, that may be necessary. That means transformers in the audio lines to the soundcard and an optoisolator in the RTS to PTT line. Be careful about how the optoisolator is powered so you do not negate the careful grounding isolation that you would do otherwise. There is a good schematic for proper isolation of the computer and transceiver grounds in Jan 2006 QST, page 60 (you need only consider the part in the shaded box). Note carefully the grounding to the enclosure does not extend to the computer - if you have jacks for the soundcard connections mounted on a metallic box, that would destroy the ground isolation - you must either avoid audio jacks at the enclosure or if jacks are used, they must be mounted on an insulator. 73, Don W3FPR > -Original Message- > > Don, > > Today I have checked all connections in KPA100 T-R switch - they was OK. > After connection checking I assembled KPA100/KAT100 again and started > TX on 17 m again - the problem still occurred. > But as you know I'm digi modes fan so, all the TRX keying was > made by computer. Today, when I have been use VOX or foot switch the > problem disappeared! > In this moment I know, the problem occurs only when computer > control K2 keying. > So, it clears why TUNE coming back RX to normal sensitivity. > Do you know what can I do now? > > 73, > Marcin SQ2AF > > K2 #5408 > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K1-4 on 30/20/17/15 ?
Well then, perhaps I'll just get back to thinking as to how much effort I wish to put into it. Thank you for clearing up my confusion over your reply. David, k3tue . --- Mike Morrow <[EMAIL PROTECTED]> wrote: > David wrote: > > >Well, that just sways me back to the 'I won't bother with a K1 > >(since I have a KX-1) position and just get a K2 next (even if > >it is not quite a unquantifyable pure sounding as a K1). > > Well, David, I'm sorry to hear about anyone foregoing a K1. It is my > favorite QRP rig of the nine that I own, eight of which were put out by three > other outfits. In fact, it's my favorite of any QRP rig I've ever heard > about. > > The first technical hurdle you'd have to overcome wouldn't be all that hard: > Re-designing the lower-frequency receiver input/transmitter output LPF so > that you could have 30m and 20m on that filter. > > The existing third-order elliptical filter rolls off steeply just above about > 10.5 MHz. You could use the "Elsie" freeware found at: > > http://tonnesoftware.com/elsie.html > > to come up with something similar that rolled off near 14.5 MHz instead. > > With a little head-scratching and thought, the re-arrangement and value > changes of fixed caps in the two other band-pass filters shouldn't be > impossible for supportting 20m and 30m as band 1 and band 2. > > My point was not that it would be impossible to do what you wanted, but just > that it would take some work and re-design. > > Good luck, what ever you decide. > > Mike / KK5F > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K1-4 on 30/20/17/15 ?
David wrote: >Well, that just sways me back to the 'I won't bother with a K1 >(since I have a KX-1) position and just get a K2 next (even if >it is not quite a unquantifyable pure sounding as a K1). Well, David, I'm sorry to hear about anyone foregoing a K1. It is my favorite QRP rig of the nine that I own, eight of which were put out by three other outfits. In fact, it's my favorite of any QRP rig I've ever heard about. The first technical hurdle you'd have to overcome wouldn't be all that hard: Re-designing the lower-frequency receiver input/transmitter output LPF so that you could have 30m and 20m on that filter. The existing third-order elliptical filter rolls off steeply just above about 10.5 MHz. You could use the "Elsie" freeware found at: http://tonnesoftware.com/elsie.html to come up with something similar that rolled off near 14.5 MHz instead. With a little head-scratching and thought, the re-arrangement and value changes of fixed caps in the two other band-pass filters shouldn't be impossible for supportting 20m and 30m as band 1 and band 2. My point was not that it would be impossible to do what you wanted, but just that it would take some work and re-design. Good luck, what ever you decide. Mike / KK5F ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K1-4 on 30/20/17/15 ?
Well, that just sways me back to the 'I won't bother with a K1 (since I have a KX-1)' position and just get a K2 next (even if it is not quite a unquantifyable pure sounding as a K1). Thank you for the help in deciding (again). dt . --- Mike Morrow <[EMAIL PROTECTED]> wrote: > David wrote: > > >I would like to setup a K1-4 for 30/20/17/15, which I believe would need an > LPF > >for 20 and 15). I believe I can do this with all of the parts that come > with a > >K1-4 except that I don't know if it includes an LPF for 20. > > As supplied, the K1 with KFL1-4 covers 40m, 30m, and any two of the 20m, 17m, > or 15m bands. It does NOT cover ANY four of the 40m, 30m, 20m, 17m, 15m > bands. Actually, K1 product literature claims that the KFL1-4 coverage is > 40m, 30m, 20m, and either 17m or 15m, but the KFL1-4 is actually a little > more versatile than that. I guess they thought no one would ever give up 20m > coverage. > > It has two LP filter sections in the transmitter output/receiver input signal > path. > > One LP filter section is switched in by firmware for the two lowest bands > (40m and 30m), with a filter cutoff somewhere above 30m but below 20m, where > the second harmonics of 40m operation would appear. > > The other transmitter LP filter section is switched in by firmware for the > two highest bands (any two of 20m, 17m, 15m), with a cutoff somewhere above > 15m but below 10m, where the second harmonics of 20m operation would occur. > > Thus, as supplied, the KFL1-4 won't cover 30m, 20m, 17m, and 15m because > you'd be trying to put 30m and 20m signals through the same LP filter that > cuts off below 20m. > > Additionally, it would be hard to juggle around the values of the fixed > capacitors in the pre-mix and the RF band-pass filters to accomodate 30m and > 20m operation for the firmware-programmed bandswitching relay latching action > that takes place for 30m and 40m operation. > > Of course, KFL1-4 firmware could be modified to select one LP filter section > for only one band (30m), while selecting the other LP filter section for the > other three bands (20m, 17m, 15m), but we don't have the option of altering > the KFL1-4 firmware. > > Your combo is not impossible, but it would take some study, BP/LP filter > redesign, and additional parts (fixed capacitors). But be careful. The K1 > has the best spurious output specs of any Elecraft rig, and re-design could > sacrifice that spec. > > IMHO, it would be best to choose a combo of bands that the KFL1-4 already > supports. Trading off 17m for 40m isn't much of a penalty. It gives you a > good night-time band any time of the year or solar cycle. > > 73, > Mike / KK5F > K1 No. 175 (Nov. 2000) > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Fire Sale
I'll add to Brian's comments that it does not always require a burr to produce the short. In some KX1s either the head of the screw is a tiny bit smaller or the hole is a tiny bit larger, allowing the beveled screw head to reach through the hole in the cover and thermal-conducting pad and touch the metal tab on the transistor, causing a short. I fixed mine long, long ago by adding a second thermal-conducting pad. Still, I'm very careful to check for a short whenever I reassemble it. But in dozens of disassembly/reassembly operations it's never been shorted. Others, with slightly smaller case holes or screws with a slightly bigger head never had the problem. They were unable to create a short, even when trying. The nylon screw is the really foolproof solution. That's why they are supplied with all current KX1s. Ron AC7AC -Original Message- Hi, Paul! Sounds like a tiny metal burr is shorting the case of Q6 to ground. These are almost always at the screw hole. Check the following: 1. Make sure the screw itself is plastic; Elecraft will send you a new one free if it isn't. 2. Pull off the insulated pad and use an Xacto knife from the inside of the cover to "circle" (swirl around at a 45 deg angle) the Q6 mounting hole and remove any burrs. 3. Using fine sandpaper, sand the area inside the case that the insulated pad covers to ensure it is perfectly flat, especially around the screw hole. Replace the insulated pad and reassemble. Very smart of you to use an ohm meter to alert you of potential smoke inhalation during power-up. Brian - W6FVI ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Problem with 17m band in K2 + KAT100/KPA100 in EC2
Marcin, As a guess, your computer connections or even the computer itself may be picking up RF. Are you listening to the audio on the K2 speaker, or just observing it on the computer display (or listening to it on the computer speakers? If you are seeing the drop in audio only on the computer, it may be the computer at fault and not the K2. If you do not have ground isolation between your computer and the K2, that may be necessary. That means transformers in the audio lines to the soundcard and an optoisolator in the RTS to PTT line. Be careful about how the optoisolator is powered so you do not negate the careful grounding isolation that you would do otherwise. There is a good schematic for proper isolation of the computer and transceiver grounds in Jan 2006 QST, page 60 (you need only consider the part in the shaded box). Note carefully the grounding to the enclosure does not extend to the computer - if you have jacks for the soundcard connections mounted on a metallic box, that would destroy the ground isolation - you must either avoid audio jacks at the enclosure or if jacks are used, they must be mounted on an insulator. 73, Don W3FPR > -Original Message- > > Don, > > Today I have checked all connections in KPA100 T-R switch - they was OK. > After connection checking I assembled KPA100/KAT100 again and started > TX on 17 m again - the problem still occurred. > But as you know I'm digi modes fan so, all the TRX keying was > made by computer. Today, when I have been use VOX or foot switch the > problem disappeared! > In this moment I know, the problem occurs only when computer > control K2 keying. > So, it clears why TUNE coming back RX to normal sensitivity. > Do you know what can I do now? > > 73, > Marcin SQ2AF > > K2 #5408 > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KX1 Fire Sale
Hi, Paul! Sounds like a tiny metal burr is shorting the case of Q6 to ground. These are almost always at the screw hole. Check the following: 1. Make sure the screw itself is plastic; Elecraft will send you a new one free if it isn't. 2. Pull off the insulated pad and use an Xacto knife from the inside of the cover to "circle" (swirl around at a 45 deg angle) the Q6 mounting hole and remove any burrs. 3. Using fine sandpaper, sand the area inside the case that the insulated pad covers to ensure it is perfectly flat, especially around the screw hole. Replace the insulated pad and reassemble. Very smart of you to use an ohm meter to alert you of potential smoke inhalation during power-up. Brian - W6FVI Paul T. Rubin wrote: Hello all: I had disassembled my previously operational KX1 (SN854) in anticipation of adding the KXB3080 option. However I realized that it would be some time before I could get around to it, and I felt like operating. So I put it back together, powered it up, and released the smoke. Examination showed that a short section of V+ PCB trace just after the power switch had vaporized. PCB traces make excellent fusible links. I measured the resistance to ground from the far end of the trace. It was 1025 Ohms. By now I had a pretty good idea what was going on. I repaired the trace, and measured the same resistance at the power connector. So far so good. I powered it up outside of the case and all is well. Now I'm real sure what's going on. I reassembled it into the case, and measured the resistance at the power connector; 0.4 Ohms. Q6 was shorted to the case. I backed off the screw for Q6 1/8 of a turn and the short goes away. I examined the plastic spacer and it does not seem deformed. The insulating pad also seems fine. I did not torque the screw to 20 foot pounds. I don't know what to do next. All suggestions appreciated. Thanks, Paul N8NOV Houston ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Problem with 17m band in K2 + KAT100/KPA100 in EC2
Don, Today I have checked all connections in KPA100 T-R switch - they was OK. After connection checking I assembled KPA100/KAT100 again and started TX on 17 m again - the problem still occurred. But as you know I'm digi modes fan so, all the TRX keying was made by computer. Today, when I have been use VOX or foot switch the problem disappeared! In this moment I know, the problem occurs only when computer control K2 keying. So, it clears why TUNE coming back RX to normal sensitivity. Do you know what can I do now? 73, Marcin SQ2AF K2 #5408 2006/9/7, Don Wilhelm <[EMAIL PROTECTED]>: Mike, I am certain Marcin will be interested in your results when portable. The only thing that I can think of is a bad connection in the KPA100 T-R switch, but then I am just guessing. Marcins's problem continues until the KPA100 switches out at the 10 watt level, so your problem may be different. 73, Don W3FPR > -Original Message- > Don, > > I am experiencing the same or a very similar problem as Marcin. It > only happens on 17M and only at high power. That is why we do not > see it after a Tune operation. If I turn the power down to 30W or > less, no problem. It makes no difference whether the KPA100 is the > top cover or remoted in an EC2 with the KAT100. I haven't determined > exactly how much power I have to be running before the problem > occurs. I suspect RF getting somewhere it shouldn't but have not had > the time to track it down. It does seem to be antenna dependent even > though I get a good match to the 102 foot doublet I use. I will get > a chance to test my theory next week when I take the K2/100 portable > for a week using a different antenna than I do at home. If it occurs > only at the home QTH then the problem is in the antenna system and > probably stray RF affecting something in the K2. > > 73, > Mike K2/100 #2221 > > At 01:31 PM 9/6/2006, Don Wilhelm wrote: > >Marcin, > > > >There is nothing in the KPA100 or the base K2 that would cause > that problem > >on 17 meters only. > >In the base K2, the relay switching is shared for 17 and 15 meters except > >for relay K6 in the bandpass filter, and in the KPA100, all circuits are > >shared between 17 and 20 meters. You would have a problem on either 20 > >meters or 15 meters in addition to 17 meters if it was associated with > >either the K2 or KPA100 switching relays. > > > >If you have a dedicated 17 meter antenna, you may want to investigate the > >switching to that antenna. > > > >TUNE should behave the same as transmit, but you say that receive > >sensitivity does not drop after TUNE - that is indeed strange. > We need more > >data. > > > >73, > >Don W3FPR > > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] KX1 Fire Sale
Paul, Get the nylon screw. If you already have the nylon screw, then examine the area on the case around the countersink hole (top and bottom) for any burrs or pieces of metal that may be tightening against the transistor tab when you tighten the screw. 73, Don W3FPR > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Paul T. Rubin > Sent: Friday, September 08, 2006 9:06 AM > To: elecraft@mailman.qth.net > Subject: [Elecraft] KX1 Fire Sale > > > Hello all: > > > > I had disassembled my previously operational KX1 (SN854) in > anticipation of > adding the KXB3080 option. However I realized that it would be some time > before I could get around to it, and I felt like operating. So I put it > back together, powered it up, and released the smoke. Examination showed > that a short section of V+ PCB trace just after the power switch had > vaporized. PCB traces make excellent fusible links. I measured the > resistance to ground from the far end of the trace. It was 1025 Ohms. By > now I had a pretty good idea what was going on. I repaired the trace, and > measured the same resistance at the power connector. So far so good. I > powered it up outside of the case and all is well. Now I'm real > sure what's > going on. I reassembled it into the case, and measured the resistance at > the power connector; 0.4 Ohms. Q6 was shorted to the case. I > backed off the > screw for Q6 1/8 of a turn and the short goes away. I examined > the plastic > spacer and it does not seem deformed. The insulating pad also seems fine. > I did not torque the screw to 20 foot pounds. I don't know what > to do next. > All suggestions appreciated. > > > > Thanks, > > > > Paul N8NOV > > Houston > > > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.405 / Virus Database: 268.12.1/440 - Release Date: 9/6/2006 > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 Fire Sale
Hello all: I had disassembled my previously operational KX1 (SN854) in anticipation of adding the KXB3080 option. However I realized that it would be some time before I could get around to it, and I felt like operating. So I put it back together, powered it up, and released the smoke. Examination showed that a short section of V+ PCB trace just after the power switch had vaporized. PCB traces make excellent fusible links. I measured the resistance to ground from the far end of the trace. It was 1025 Ohms. By now I had a pretty good idea what was going on. I repaired the trace, and measured the same resistance at the power connector. So far so good. I powered it up outside of the case and all is well. Now I'm real sure what's going on. I reassembled it into the case, and measured the resistance at the power connector; 0.4 Ohms. Q6 was shorted to the case. I backed off the screw for Q6 1/8 of a turn and the short goes away. I examined the plastic spacer and it does not seem deformed. The insulating pad also seems fine. I did not torque the screw to 20 foot pounds. I don't know what to do next. All suggestions appreciated. Thanks, Paul N8NOV Houston ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 PAGE
In April of 2006 Wayne posted a message that referred to a KX1 page. Has this page been created and where? I just finished #1497 (KX1) and am totally impressed with the design and how well the instructions were laid out to follow. Thanks to Wayne and the gang at Elecraft and also the support that I received when I called. Special thanks to Don W3FPR for the help with the 30/80 module. Also special thanks goes to the gals that put all the parts in the kits. After checking against the part list for the 4 different kits I had there was nothing missing. I hope that they have a good vision program there at Elecraft Randy AG8A __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2/100 for sale
A friend that has terminal with cancer has ask me to sell his K2/100 and suggested that I offer it on this reflector. It's a K2, KPA100 amplifier, KDSP2 DSP filter, KNB2 Noise blanker, KSB2 SSB option and FDIMP finger dimple S/N 5076. It was completed about February of this year (2006)and he did an excellent construction job being that he is an electronics engineer and experienced kit builder. I have had it on my operating table for about a month and find no problems that I can identify. It comes with all manuals and notes that he made while aligning. Also comes with the QRP cover. I will cover half of the shipping charge in CONUS. $1225.00. If there are any questions please ask. 73 Jim K4CGY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] N2CQ QRP Contest Calendar: Sep 8 - Oct 8, 2006
~ N2CQ QRP CONTEST CALENDAR September 8 - Oct 8, 2006 ~ FISTS G3ZQS Memorial Straight Key Contest ... QRP Category Sep 08, 2300z to Sep 10, 2300z Rules: http://www.fists.org/straightkey.html ~ Worked All Europe DX Contest (SSB) 100W Power Category Sep 09, z to Sep 10, 2400z Rules: http://www.darc.de/referate/dx/fedcw.htm ~ Swiss HTC QRP Sprint (CW) *** QRP Contest *** Sep 09, 1300z to 1900z Rules: http://www.htc.ch/de/htc_sprint_contest.htm or: http://www.sk3bg.se/contest/htcqrpsp.htm ~ ARRL September VHF QSO Party (All) Low Power Category Sep 09, 1800z to Sep 11, 0300z Rules: http://www.arrl.org/contests/calendar.html?year=2006 ~ Second Class Operator Club Marathon (CW) *** QRP Contest *** Sep 09, 1800z to 2400z Rules: http://www.qsl.net/soc/contests.htm#top ~ NA Sprint (CW)... QRP Category Sep 10, z to 0400z Rules: http://www.ncjweb.com/sprintrules.php ~ Tennessee QSO Party (SSB/CW/Dig) ... QRP Category Sep 10, 1800z to Sep 11, 0100z Rules: http://www.k4ro.net/tcg.html ~ End of Summer Digital Sprint *** QRP Contest *** Sep 10, 2000z to 2400z Rules: http://www.qrparci.org ~ FISTS: Get Your Feet Wet Weekend ... QRP Category Sep 15, z to Sep 18, z Rules: http://www.fists.org/getfeetwet.html ~ AGB NEMIGA Contest (80M CW/SSB) ... QRP Category Sept 15, 2100z to 2400z Rules: http://www.qsl.net/eu1eu/agb_nemiga.htm ~ PODXS 070 Club 80m Autumn Sprint (PSK31) ... QRP Category Sep 15, 2000 Local to 0200 Local Rules: http://podxs.com/html/070_club.html ~ Scandinavian Activity Contest (CW) ... QRP Category Sep 16, 1200z to Sep 17, 1200z Rules: http://www.sk3bg.se/contest/sacnsc.htm ~ South Carolina QSO Party (ALL) ... QRP Category Sep 16, 1300z to Sep 17, 2100z Rules: http://www.kf4ghc.net/ ~ QRP Afield (All) *** QRP Contest *** Sep 16, 1500z to 2100z Rules: http://www.qsl.net/wq1rp/ ~ Washington State Salmon Run (CW/SSB) ... QRP Category Sep 16, 1600z to Sep 17, 0700z Sep 17, 1600z to Sep 17, 2400z Rules: http://www.wwdxc.org/salmonrun/rules.htm ~ NA Sprint (SSB)... QRP Category Sep 17, z to 0400z Rules: http://www.ncjweb.com/sprintrules.php ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EDT: Sep 17, 9 PM to 11 PM UTC: Sep 18, 0100z 0300z Rules: http://fpqrp.com ~ NAQCC Straight Key/Bug Sprint *** QRP CONTEST! *** EDT: Sep 20, 8:30 PM to 10:30 PM UTC: Sep 21, 0030z to 0230z Rules: http://www.arm-tek.net/~yoel/contests.html ~ CQWW RTTY DX Contest ... <150w Category Sep 23, z to Sep 24, 2400z Rules: http://www.cq-amateur-radio.com/awards.html ~ Scandinavian Activity Contest (SSB) ... QRP Category Sep 23, 1200z to Sep 24, 1200z Rules: http://www.sk3bg.se/contest/sacnsc.htm ~ Texas QSO Party (All) ... QRP Category Sep 23, 1400z to Sep 24, 0200z Sep 24, 1400z to Sep 24, 2000z Rules: http://www.txqp.org/ ~ AGCW VHF/UHF CW Contest ... QRP Category Sep 23, 1600z to 2100z Rules: http://www.agcw.org/agcw-con/2006/Englisch/agcw-dl0_e.htm ~ Fall QRP Homebrewer Sprint (CW/PSK31) ***QRP CONTEST*** Sep 25, z to 0400z Rules: http://www.njqrp.org/data/qrphomebrewersprint.html ~ TOEC WW Grid Contest (CW) ... QRP Category Sep 30, 1200z to Oct 1, 1200z Rules: http://www.sk3bg.se/contest/toecwwgc.htm ~ Arkansas QSO Party (CW/SSB/PSK31) ... QRP Category Sep 30, 1600z to Oct 1, 0600z and Oct 1, 1800z to Oct 2, 0200z Rules: http://zinfoserv.com/arkan/qso_party.php ~ FISTS Coast to Coast Contest ... QRP Categor
[Elecraft] Re: ZB2FK
If you just type the call ZB2FK in Google you will find a lot of information. When I run into a for me unfamiliar callsign I always follow that route. You can also find ZB2FK in QRZ.COM and Buckmasters. 73, Rob, PA0RBO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Elecraft CW Net notes from the midweek.
AHHH, How Sweet. john - Original Message - From: "Kevin Rock" <[EMAIL PROTECTED]> To: "Elecraft" Sent: Thursday, September 07, 2006 11:54 PM Subject: [Elecraft] Elecraft CW Net notes from the midweek. This surprised me. I needed some fiddly bits for this weekend's net. Drove to HRO in Portland and wandered about a bit. Asked a few questions about this and that and joshed them a bit about things. Got quite a number of answers and then the biggie. I was asked about the CW nets I had mentioned in passing. Casually I said I run the Elecraft CW Nets on Sunday. Well, then and there, I was thanked for running the nets. One of them (nameless unless he wishes to reveal himself :) shook my hand and thanked me. He had worked me from Florida more than once on his K1 and enjoyed the experience. Thank you Mr. Nameless :) I enjoyed hearing your encomium. I blushed a might and kept my head pointed at the gear. Running the nets are thanks enough for me. I get a kick out of hearing all you folks from thither and yon. Next summer I hope to work my way across the continent toward Wisconsin and maybe even eastward. If I meet you on my journey I will thank you for being part of my learning experience. Learning what I can and cannot do with my K2/100 has been exciting. Learning CW while you people suffer is my albatross. (Apologies to all mariners) The Sun now rose upon the right: Out of the sea came he, Still hid in mist, and on the left Went down into the sea. And the good south wind still blew behind, But no sweet bird did follow, Nor any day for food or play Came to the mariners' hollo! And I had done an hellish thing, And it would work 'em woe: For all averred, I had killed the bird That made the breeze to blow. Ah wretch ! said they, the bird to slay, That made the breeze to blow! Nor dim nor red, like God's own head, The glorious Sun uprist: Then all averred, I had killed the bird That brought the fog and mist. The fair breeze blew, the white foam flew, The furrow followed free; We were the first that ever burst Into that silent sea. Down dropt the breeze, the sails dropt down, 'Twas sad as sad could be; And we did speak only to break The silence of the sea! All in a hot and copper sky, The bloody Sun, at noon, Right up above the mast did stand, No bigger than the Moon. Day after day, day after day, We stuck, nor breath nor motion; As idle as a painted ship Upon a painted ocean. Water, water, every where, And all the boards did shrink; Water, water, every where, Nor any drop to drink. The very deep did rot: O Christ! That ever this should be! Yea, slimy things did crawl with legs Upon the slimy sea. About, about, in reel and rout The death-fires danced at night; The water, like a witch's oils, Burnt green, and blue and white. And some in dreams assuréd were Of the Spirit that plagued us so; Nine fathom deep he had followed us From the land of mist and snow. And every tongue, through utter drought, Was withered at the root; We could not speak, no more than if We had been choked with soot. Ah! well a-day! what evil looks Had I from old and young! Instead of the cross, the Albatross About my neck was hung. -- Mr. Coleridge saith words I cannot match. I run the Net oft caught in my debauch. I gather my wits; to meet me kith and gather them from whither. Your humble NCS, KD5ONS (Net Control 5th Class) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
