[Elecraft] KPA-1500 Update
Any updates on when ordering will start and when the amp will ship? Thanks in advance. Rich - N5ZC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
The point should be that a "drop of LocTite" isn't going to fix the problem over time. You should not have to modify a product immediately out of the box because of a lousy design. Best regards, Tom, W1TEF Lexington, SC On 7/24/2017 6:22 PM, John Oppenheimer wrote: This is the response I received from Elecraft support: On 06/27/2017 01:34 PM, Elecraft Support wrote: To your question, yes, we are now using a drop of Locktite Blue (not Red) on the threads for the 2 screws that hold the round contacts in place. John KN5L On 07/24/2017 10:45 AM, KENT TRIMBLE wrote: The issue is not that the paddles don't leave the factory fully tested and operational, but that the stand-offs (E700348) loosen after a period of time from normal use. As posted by several of us previously, the fix is simply to place a small dab of Loctite Blue on the threads of the two flathead screws (E700277) which secure the stand-offs. __ 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 Message delivered to kx2_...@swsports.org __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
Hi Tom, First let me say that I am not trying to argue with you or correct you. I just want to share what little bit of knowledge I have. In my many years as a master mechanic in the heavy duty truck industry, I can tell you without reservation that unless you use physical force (screwdriver, etc.) and turn the screw, it will not come loose from the type of use a set of paddles on a KX2 would get and could be considered a permanent fix. We used Blue Loctite for countless purposes and I never saw it come loose on a truck which would have put many times more vibration, stress and possibly heat on the fastener. Now, that being said, you need to have the fastener clean but in the case of the KX2 paddles, it should not be an issue. I would not recommend using red Loctite. You may not get the fastener out even if you want to without destroying something. I know that from experience. As far as the design goes, I would not say it is a lousy design. I would say that they just left a step out. They forgot the blue Loctite. Elecraft isn't perfect, but they are darn close. 73 Dave KD9VT On Tue, Jul 25, 2017 at 7:47 AM, Tom Francis, W1TEF wrote: > The point should be that a "drop of LocTite" isn't going to fix the > problem over time. > > You should not have to modify a product immediately out of the box because > of a lousy > design. > > Best regards, > > Tom, W1TEF > Lexington, SC > > On 7/24/2017 6:22 PM, John Oppenheimer wrote: > >> This is the response I received from Elecraft support: >> >> On 06/27/2017 01:34 PM, Elecraft Support wrote: >> >>> To your question, yes, we are now using a drop of Locktite Blue (not >>> Red) on the threads for the 2 screws that hold the round contacts in >>> place. >>> >> John KN5L >> >> On 07/24/2017 10:45 AM, KENT TRIMBLE wrote: >> >>> The issue is not that the paddles don't leave the factory fully tested >>> and operational, but that the stand-offs (E700348) loosen after a period >>> of time from normal use. >>> >>> As posted by several of us previously, the fix is simply to place a >>> small dab of Loctite Blue on the threads of the two flathead screws >>> (E700277) which secure the stand-offs. >>> >> __ >> 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 >> Message delivered to kx2_...@swsports.org >> >> > __ > 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 > Message delivered to davebelvi...@gmail.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
As I learned from my previous manufacturing experience and knowledge, a threaded fastener, a.k.a. screw, has a specific torque value which should be applied to make it secure. The value depends on the screw design, flat head, binder head, round head, undercut, pan head, etc. The only way to attain this value is to use a torque calibrated screwdriver or wrench to secure the fastener.Also, depending on application, the proper lock washer, internal tooth, external tooth or split spring should be applied. Additional measures may be required when the screw is used with dis-similar materials. Hence one of the Loctite products, again application specific, may be required. 73 Bob, K4TAX K3S s/n 10163 On 7/25/2017 8:14 AM, Dave Belville wrote: Hi Tom, First let me say that I am not trying to argue with you or correct you. I just want to share what little bit of knowledge I have. In my many years as a master mechanic in the heavy duty truck industry, I can tell you without reservation that unless you use physical force (screwdriver, etc.) and turn the screw, it will not come loose from the type of use a set of paddles on a KX2 would get and could be considered a permanent fix. We used Blue Loctite for countless purposes and I never saw it come loose on a truck which would have put many times more vibration, stress and possibly heat on the fastener. Now, that being said, you need to have the fastener clean but in the case of the KX2 paddles, it should not be an issue. I would not recommend using red Loctite. You may not get the fastener out even if you want to without destroying something. I know that from experience. As far as the design goes, I would not say it is a lousy design. I would say that they just left a step out. They forgot the blue Loctite. Elecraft isn't perfect, but they are darn close. 73 Dave KD9VT __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 SHUTTING DOWN OPERATING JT65
Mike, I am experiencing a similar thing. I had a session on FT8 a few days ago and my K3 shut down completely, in fact it blew a 20A fuse on my alternate 20A PSU but just shuts down on my 40A supply. One thing I notice is that it appears to be drawing nearly 5 Amps on receive which is excessive and one occasion while I was testing actually shut down on receive. It isn't the DC lead as I have replaced that with a factory supplied item. I'm still working on it but unless the experts in this group have any ideas I will attempt to re-invent the wheel. 73 Colin, G3PSM On 23/07/2017 03:17, Michael Walker wrote: Hi Buddy I can thing of 2 things. Overheating .. not likely since usually the RF section shut downs. RF getting into the power supply. Grounding might not make a difference. RF Chokes on the power supply DC cord might help. Oh, the 3rd thing, Is your power supply up to the task? Might it be failing? Throw a volt meter on it. Mike va3mw On Sat, Jul 22, 2017 at 9:28 PM, buddy s wrote: i am using wsjt-x software for jt65 using my k3. after operating for approximately 2 hours today, i answered a cq, and after 30 seconds the k3 shut down completely. i waited a few minutes and changed antennas. the k3 powered up, and i tried again. same result, shutdown after 30 seconds of transmitting. my power is set to 30 watts, and i am using a kat500 with both antennas. any suggestions, any questions? 73 de W3BS, Buddy Spiegel __ 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 Message delivered to va...@portcredit.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to colin.g3...@gmail.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
It's useful to remember that a screw (or bolt) is a spring. When tightened it stretches lengthwise. Like any spring, it offers the best "grip" when subjected to the right range of pressure. Way back in my High School days (1950's - before Mercury was a toxic substance) I watched a demonstration using a bolt and nut made of frozen Mercury. Mercury is not elastic. Liquid Mercury was poured into molds for a nut and bolt and hardened with liquid nitrogen. Using gloves, the demonstrator assembled the nut and bolt using a large wrench to apply a great deal of torque. That done, anyone could loosen it without a wrench by just twisting the nut or bolt with minimal finger pressure (inside the gloves of course). There was no resistance since Mercury does not stretch. It's easy to over torque (stretch) small screws. That's why the Elecraft kit assembly manuals do not recommend using power screwdrivers. The Elecraft factory in Watsonville is equipped with special torque-limiting power screwdrivers to allow quick assembly with screws not so tight they are damaged or broken. Since a screw is basically an inclined plane that stretches the screw when tightened, vibration will allow the screw to turn (slide along the plane of the threads), hence the use of lock washers or chemical compounds in such environments to stop any movement. Perhaps the issue with the KX2 paddles is the vibration as the contacts collide allowing the screws to turn. Working remotely on the Elecraft manuals I've not been directly involved with the issue, so that is pure speculation. 73, Ron AC7AC __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Fwd: Re: K3 SHUTTING DOWN OPERATING JT65
Buddy/Mike, further to my earlier email the current on receive is actually 1.05A as measured on a digital multimeter and not 5A as indicated on the PSU analogue meter. Of course this doesn't solve the immediate problem. 73 Colin, G3PSM Forwarded Message Subject:Re: [Elecraft] K3 SHUTTING DOWN OPERATING JT65 Date: Tue, 25 Jul 2017 16:01:10 +0100 From: Colin To: elecraft@mailman.qth.net Mike, I am experiencing a similar thing. I had a session on FT8 a few days ago and my K3 shut down completely, in fact it blew a 20A fuse on my alternate 20A PSU but just shuts down on my 40A supply. One thing I notice is that it appears to be drawing nearly 5 Amps on receive which is excessive and one occasion while I was testing actually shut down on receive. It isn't the DC lead as I have replaced that with a factory supplied item. I'm still working on it but unless the experts in this group have any ideas I will attempt to re-invent the wheel. 73 Colin, G3PSM On 23/07/2017 03:17, Michael Walker wrote: Hi Buddy I can thing of 2 things. Overheating .. not likely since usually the RF section shut downs. RF getting into the power supply. Grounding might not make a difference. RF Chokes on the power supply DC cord might help. Oh, the 3rd thing, Is your power supply up to the task? Might it be failing? Throw a volt meter on it. Mike va3mw On Sat, Jul 22, 2017 at 9:28 PM, buddy s wrote: i am using wsjt-x software for jt65 using my k3. after operating for approximately 2 hours today, i answered a cq, and after 30 seconds the k3 shut down completely. i waited a few minutes and changed antennas. the k3 powered up, and i tried again. same result, shutdown after 30 seconds of transmitting. my power is set to 30 watts, and i am using a kat500 with both antennas. any suggestions, any questions? 73 de W3BS, Buddy Spiegel __ 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 Message delivered to va...@portcredit.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to colin.g3...@gmail.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fwd: Re: K3 SHUTTING DOWN OPERATING JT65
If you have a dummy load, try running JT8 or JT65 into that at your usual power.If problem does not reoccur, then likely RFI is the culprit. If it does reoccur, then likely the K3 is having issues. - 73 and good DX de Mike, K6MKF, Past President - NCDXC > -Original Message- > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > boun...@mailman.qth.net] On Behalf Of Colin > Sent: Tuesday, July 25, 2017 9:15 AM > To: elecraft@mailman.qth.net > Subject: [Elecraft] Fwd: Re: K3 SHUTTING DOWN OPERATING JT65 > > Buddy/Mike, further to my earlier email the current on receive is actually 1.05A > as measured on a digital multimeter and not 5A as indicated on the PSU analogue > meter. > > Of course this doesn't solve the immediate problem. > > 73 > > Colin, G3PSM > > > > > > Forwarded Message > Subject: Re: [Elecraft] K3 SHUTTING DOWN OPERATING JT65 > Date: Tue, 25 Jul 2017 16:01:10 +0100 > From: Colin > To: elecraft@mailman.qth.net > > > > Mike, I am experiencing a similar thing. I had a session on FT8 a few > days ago and my K3 shut down completely, in fact it blew a 20A fuse on my > alternate 20A PSU but just shuts down on my 40A supply. > > One thing I notice is that it appears to be drawing nearly 5 Amps on receive > which is excessive and one occasion while I was testing actually shut down on > receive. > > It isn't the DC lead as I have replaced that with a factory supplied item. > > I'm still working on it but unless the experts in this group have any ideas I will > attempt to re-invent the wheel. > > 73 > > Colin, G3PSM > > On 23/07/2017 03:17, Michael Walker wrote: > > Hi Buddy > > > > I can thing of 2 things. Overheating .. not likely since usually the > > RF section shut downs. > > > > RF getting into the power supply. Grounding might not make a difference. > > RF Chokes on the power supply DC cord might help. > > > > Oh, the 3rd thing, Is your power supply up to the task? Might it be > > failing? Throw a volt meter on it. > > > > Mike va3mw > > > > > > On Sat, Jul 22, 2017 at 9:28 PM, buddy s wrote: > > > >> i am using wsjt-x software for jt65 using my k3. after operating for > >> approximately 2 hours today, i answered a cq, and after 30 seconds > >> the k3 shut down completely. i waited a few minutes and changed > >> antennas. the k3 powered up, and i tried again. same result, > >> shutdown after 30 seconds of transmitting. my power is set to 30 > >> watts, and i am using a kat500 with both antennas. > >> > >> any suggestions, any questions? > >> > >> 73 de > >> W3BS, Buddy Spiegel > >> __ > >> 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 Message delivered to > >> va...@portcredit.net > >> > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net Please help support this email > > list: http://www.qsl.net/donate.html Message delivered to > > colin.g3...@gmail.com > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > __ > 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 Message > delivered to mike.flow...@gmail.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fwd: Re: K3 SHUTTING DOWN OPERATING JT65
My K3S does show the voltage and current on its display. In receive it nominally is 13.8 volts and 1.05 amps. For transmit, CW mode key closed 100 watts output the current is 18.5 amps. Both of these values concur with my power supply metering. I've experienced no shut down while operating JT-65 or more recently FT-8. For JT-65 I normally set the PWR to 50 watts. For FT-8, being a shorter transmit time, although duty cycle is the same as JT-65 or about 50%, I do sometimes run 100 watts. More often I find 25 to50 watts to be most adequate. 73 Bob, K4TAX K3S s/n 10163 On 7/25/2017 11:14 AM, Colin wrote: Buddy/Mike, further to my earlier email the current on receive is actually 1.05A as measured on a digital multimeter and not 5A as indicated on the PSU analogue meter. Of course this doesn't solve the immediate problem. 73 Colin, G3PSM __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
I have had this issue with my KX2 paddle and have two observations: On my paddle, the screw that is meant to hold the standoff to the plastic body will actually screw tightly into the plastic body *without* the standoff. When this happens, additional torque applied with a screwdriver has no effect on the standoff. When my paddle got loose I tightened the screw with a screwdriver, but then later (after it got loose multiple times) I realized that the screw felt tight because the threads were *gripping the plastic. *The connection with the standoff was still fairly loose, the torque I put on the screwdriver was blocked by the tight fit of the screw's threads to the plastic. The solution I used was to turn the standoff while jogging the screw back and forth with a screwdriver until I felt the standoff grip against the other side of the plastic, then continue to jog the assembly while tightening the screw about another quarter turn, to the point where the screw was nice and tight against the standoff and *also* tight against the plastic. This approach has kept the screw and standoff stable without the need for glue. I think that if future releases of the paddle were manufactured with a slightly larger hole in the plastic, then it would be easier to achieve a tight fit between the screw and the standoff. I'd also be curious if a small lock-washer on the standoff side might help make the assembly more immune to vibration. 73, Matt NQ6N On Tue, Jul 25, 2017 at 11:12 AM, Ron D'Eau Claire wrote: > It's useful to remember that a screw (or bolt) is a spring. When tightened > it stretches lengthwise. Like any spring, it offers the best "grip" when > subjected to the right range of pressure. > > Way back in my High School days (1950's - before Mercury was a toxic > substance) I watched a demonstration using a bolt and nut made of frozen > Mercury. Mercury is not elastic. Liquid Mercury was poured into molds for a > nut and bolt and hardened with liquid nitrogen. Using gloves, the > demonstrator assembled the nut and bolt using a large wrench to apply a > great deal of torque. That done, anyone could loosen it without a wrench by > just twisting the nut or bolt with minimal finger pressure (inside the > gloves of course). There was no resistance since Mercury does not stretch. > > It's easy to over torque (stretch) small screws. That's why the Elecraft > kit > assembly manuals do not recommend using power screwdrivers. The Elecraft > factory in Watsonville is equipped with special torque-limiting power > screwdrivers to allow quick assembly with screws not so tight they are > damaged or broken. > > Since a screw is basically an inclined plane that stretches the screw when > tightened, vibration will allow the screw to turn (slide along the plane of > the threads), hence the use of lock washers or chemical compounds in such > environments to stop any movement. > > Perhaps the issue with the KX2 paddles is the vibration as the contacts > collide allowing the screws to turn. Working remotely on the Elecraft > manuals I've not been directly involved with the issue, so that is pure > speculation. > > 73, Ron AC7AC > > > __ > 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 > Message delivered to m...@nq6n.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 Message delivered to arch...@mail-archive.com
[Elecraft] K3S USB
I have a K3S and the USB has stopped working is there any way of testing it thanks GM4YLN Chris __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
I found this site: https://engineerdog.com/2015/01/11/10-tricks-engineers-need-to-know-about-fasteners/ They suggest that studies show lockwashers are ineffective, but then go on to reference other studies that show they are. I guess is all comes down to that common answer in engineering: "It depends". You have to design to your specific conditions, and probably should do some dynamic testing with fatigue loads as referenced in the article. Since I do not have testing capabilities, I use both lockwashers and threadlocker, appropriately chosen for the application using manufacturer's data sheets and selection guides, and hope for the best. 73, Mark W7MLG On Tue, Jul 25, 2017 at 9:12 AM, Ron D'Eau Claire wrote: > It's useful to remember that a screw (or bolt) is a spring. When tightened > it stretches lengthwise. Like any spring, it offers the best "grip" when > subjected to the right range of pressure. > > Way back in my High School days (1950's - before Mercury was a toxic > substance) I watched a demonstration using a bolt and nut made of frozen > Mercury. Mercury is not elastic. Liquid Mercury was poured into molds for a > nut and bolt and hardened with liquid nitrogen. Using gloves, the > demonstrator assembled the nut and bolt using a large wrench to apply a > great deal of torque. That done, anyone could loosen it without a wrench by > just twisting the nut or bolt with minimal finger pressure (inside the > gloves of course). There was no resistance since Mercury does not stretch. > > It's easy to over torque (stretch) small screws. That's why the Elecraft > kit > assembly manuals do not recommend using power screwdrivers. The Elecraft > factory in Watsonville is equipped with special torque-limiting power > screwdrivers to allow quick assembly with screws not so tight they are > damaged or broken. > > Since a screw is basically an inclined plane that stretches the screw when > tightened, vibration will allow the screw to turn (slide along the plane of > the threads), hence the use of lock washers or chemical compounds in such > environments to stop any movement. > > Perhaps the issue with the KX2 paddles is the vibration as the contacts > collide allowing the screws to turn. Working remotely on the Elecraft > manuals I've not been directly involved with the issue, so that is pure > speculation. > > 73, Ron AC7AC > > > __ > 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 > Message delivered to marklgoldb...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] 1 Khz filter
What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] TX Test Mode garbage
I received an email from a German ham telling me that he's observing the same thing that I reported a couple of years ago. Specifically an audible "clicking" sound in both my K3S and KPA500 that coincides with CW keying. See this thread: http://elecraft.365791.n2.nabble.com/KPA500-clicking-td7596512.html Since there was no "fix" from Elecraft I guess time dulled my sensitivity to it until I received the email and then I thought to listen for it again. It's thunderstorm season here in the AZ desert so my antenna cables are all disconnected. Because the problem manifests whether or not RF is being generated I put the K3S into TX Test mode and put the KPA500 into operate. As before, the clicking is still there in both the K3S and KPA500. But while doing this I noted that the SWR LEDs on the KAT500 were flashing. Since the antennas are disconnected this would be normal if RF was being generated, however as stated, I'm in Test mode. One of my tuner ports has a dummy load attached so I switched to it and lo and behold the amp output LED was showing ~50W. I have an original K3 so I tuned it to the K3S frequency, keyed the K3S and listened on the K3. I could hear a non-coherent, clicky "garbage" signal that seemed to have a spectrum roughly the width of the TX filter. Because both radios were running on the same power supply to eliminate the possibility of crosstalk via that path I fired up an SDR-IQ running on a totally separate computer and looked at the spectrum. Although it's non-synchronous to the keying I can see a signal that does have an envelope roughly shaped like a BPF although it's far from flat in the passband. The amplitude of this is affected by the output power setting and is present with the KPA500 in Standby. It also seems to be thermally sensitive; becoming less conspicuous the longer things run. 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 Message delivered to arch...@mail-archive.com
[Elecraft] For Sale KPA500F / KAT500F
I am selling my Factory built KPA500 amp Serial # 2217 and my factory built KAT500 antenna tuner. Both work great and are clean and a non smoking shack. I am selling these together and do not wish to separate them. I am selling them for $2400 Thanks Gerald Manthey - KC6CNN - Gerald K1 # 0014 K3 # 6294 KX3 # 757 -- View this message in context: http://elecraft.365791.n2.nabble.com/For-Sale-KPA500F-KAT500F-tp7632688.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
Hello John, It's used for CW. I have a pair of them (main and sub rx) and find that CW sounds more pleasing through this filter. I operate about 90% CW and I use this filter most of the time, engaging narrower filters only when it becomes really necessary. 73, Dale -- WA8SRA On Tue, Jul 25, 2017 at 3:49 PM, j...@kk9a.com wrote: > What is this used for? > > John KK9A > > From: Ralph Matheny K8RYU > Mon Jul 24 16:30:29 EDT 2017 > > > Anybody got a 1 Khz filter for K3 they wanna sell?? > > de K8RYU > > __ > 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 > Message delivered to dmbor...@gmail.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] [DETECTED AS SPAM] Re: 1 Khz filter
Same here, perfect for contesting on CW, I like to be able to hear almost up to a KC up the band to pick up those who cannot zero beat, I have 400 and 200 filters also, but only use them for extreme conditions, Merv K9FD/KH6 Hello John, It's used for CW. I have a pair of them (main and sub rx) and find that CW sounds more pleasing through this filter. I operate about 90% CW and I use this filter most of the time, engaging narrower filters only when it becomes really necessary. 73, Dale -- WA8SRA On Tue, Jul 25, 2017 at 3:49 PM, j...@kk9a.com wrote: What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to dmbor...@gmail.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 Message delivered to k...@flex.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
I added a 1 kHz filter to my "Field Day" K3 for the same reason, and I really like it. When calling CQ on CW during Field Day a lot of folks who answer are using radios they aren't very familiar with and as a result they aren't zero beat very accurately when they call. I found that I was missing stations that were calling on the skirts of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band to answer CQs I still prefer listen through the 400 Hz filter. 73, Bill - NA5DX On 7/25/2017 8:07 PM, Merv Schweigert via Elecraft wrote: Same here, perfect for contesting on CW, I like to be able to hear almost up to a KC up the band to pick up those who cannot zero beat, I have 400 and 200 filters also, but only use them for extreme conditions, Merv K9FD/KH6 Hello John, It's used for CW. I have a pair of them (main and sub rx) and find that CW sounds more pleasing through this filter. I operate about 90% CW and I use this filter most of the time, engaging narrower filters only when it becomes really necessary. 73, Dale -- WA8SRA On Tue, Jul 25, 2017 at 3:49 PM, j...@kk9a.com wrote: What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to dmbor...@gmail.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 Message delivered to k...@flex.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 Message delivered to breede...@cableone.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
On 7/25/2017 7:11 PM, Bill Breeden wrote: I found that I was missing stations that were calling on the skirts of my 400 Hz filter, so I added a 1 kHz filter. When I tune the band to answer CQs I still prefer listen through the 400 Hz filter. It's important to remember that IF bandwidth is determined by DSP, and continuously adjustable. The plug-in filters are ROOFING filters -- their primary function is to protect the DSP from overload by very strong stations outside the bandwidth of the DSP IF. They have the secondary function of adding the filtering provided by the DSP, and when the DSP and the roofing filter are at the same bandwidth, the filter skirts become steeper (sharper). Bottom line -- we don't need to buy a 1 kHz filter to get 1 kHz IF bandwidth, because the DSP already provides that. This is not your grandfather's radio! :) 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] 1 Khz filter
I am a CW operator and I have 2.8kHz, 1kHz, 400Hz and 200Hz filters in my K3. I think this is serious overkill (especially since I have another similar set in the subreceiver). The function of the crystal filters is to allow you to operate closer than (roughly) the filter bandwidth to a signal that is S9+20 dB or more without the interfering signal having any effect on the desired signal. The continuously adjustable DSP filter is a brick wall for undesired signals weaker than that. But stronger signals can activate the hardware AGC in the K3 or K3S and cause desensitization even though the QRM is outside the DSP bandpass. The optimum situation is to have a filter whose bandwidth is close to or slightly wider than the DSP bandwidth that you are using. So if you often operate with the DSP bandwidth set to, say, 900Hz, having a 1kHz filter would be convenient. If you only had the stock 2.7 kHz filter, then an undesired S9+20 dB signal 1 kHz away from the signal you are listening to might cause the sensitivity of the receiver to vary and thus interfere with your ability to copy, even though you wouldn't hear the interfering signal. So it depends on your operating habits. Since I am in the habit of listening to CW with the DSP set to 400Hz or below, the 1kHz filter doesn't do anything for me. I also think the value of the 200 Hz filter is marginal, although it has been helpful at times (like when a super-strong station one hop away from me is trying to deliberately QRM a DX station but is not exactly on the DX frequency). 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO http://www.qsl.net/k2vco/ On 25 Jul 2017 22:49, j...@kk9a.com wrote: What is this used for? John KK9A From: Ralph Matheny K8RYU Mon Jul 24 16:30:29 EDT 2017 Anybody got a 1 Khz filter for K3 they wanna sell?? de K8RYU __ 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 Message delivered to arch...@mail-archive.com