Re: [Elecraft] Front end RF overload
Dave... thanks so much. The sensitivity returned when I did the J66 jumper test. So looks like PIN diode D5 needs to be replaced. Looks like I can order from Mouser. Will do some digging and see if I can find the "more robust version". 73, Connie / K5CM On 7/19/2021 12:08 AM, David Hachadorian wrote: Try this: https://marc.info/?l=elecraft=145323127930319=2 Unfortunately, the link near the bottom for the more robust replacement part doesn't work anymore, but maybe someone can come up with the part number. I've got a bunch of them at home, but I'm on vacation. The robust replacement is slightly larger in size, but it will still fit on the solder pads if you are careful. Dave Hachadorian, K6LL Big Bear Lake, CA On 7/18/2021 9:34 PM, Connie Marshall wrote: While operating SO2R the 'HIGH RF" warning flashed on the K3 display. Before I could react and stop the transmission on the other radio the front end got zapped. The radio is down about 50 db on RX. I checked Ant 2 and RX antenna and the same problem so probably not the surge protectors on each of these inputs. Any ideas on what part goes out when this happens. The TX radio was on 20 meters and the RX radio was on 15 meters. Connie / K5CM __ 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 k6ll.d...@gmail.com -- Dave Hachadorian, K6LL Yuma, AZ __ 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] K2 alive again, yay!
On 2021-07-18 19:50, Douglas Hagerman via Elecraft wrote: Next step, adding the the immensely heavy internal lead-acid battery. *** I wonder how hard it would be to add instead a much lighter lithium-ion battery pack? Individual 18650 cells are now routine at 2.5A-H, and available up to 3.5A-H. The technology has gotten standardized, and you can buy a BMS ( Battery Management System ) card off the shelf. The only hard thing is spot welding the tabs. A 3S1P ( three cells in series, 1 in parallel ) pack would probably do fine. I just got back from the garage where I repaired such a pack. It was out of an 85W cordless vacuum cleaner. Just four cells. Like any battery, the voltage varies with charge. These cells are about 4.2V fully charged, and 3.4 when dead. For three cells, that would be 12.8V fully charged, and 10.2 when it's time to recharge. I got all set up to weld the cell tabs for an ebike project. The ratio of energy storage to battery weight is much better than lead-acid. - Jerry KF6VB __ 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] 40 meter SSB net 7-18
Very poor propagation. 20% of the users using a K4! WM6P STEVE GA K3S NET CONTROL WY3T TIM FL K3S KB9AVO PAUL IN K4 76 K8NU CARL OH FTDX101 W9EJB ED IN K3 WB9JNZ ERIC IL FT990 N8VZ CARL OH K4 138 AB0R DAVE MN K3 __ 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] Weird signal on 80m on K3 S/N 642
Can you post a picture of the signal? On Tue, Jul 20, 2021 at 2:35 PM Fred Jensen wrote: > 1. Is this list still active? Seems like ages since I've seen any > activity. Wonder if foothill.net has it blocked? > > 2. I have a strange noise on 80. It consists of what appears on the P3 > to be two slightly fuzzy carriers about 3 kHz apart, about S5-6. > Sometimes that's all there is, but much of the time, the signal slides > back and forth between them forming a rope-like pattern. The pattern is > repeated about 25 kHz lower, and both are synchronized. The lower pair > is centered on 3518, the upper pair on 3542. > > I've done all the usual [K3 on battery/main breaker off], DFing some, > and I've searched down to 100 kHz and don't find it. My P3 is in fixed > tune mode so the noise display remains constant on the screen as I tune > across it. Then, I noticed that when I tune the K3, it disturbs the > steady back and forth, creating a much finer rope-like pattern. It is > totally repeatable, and happens on both the lower and upper signals. > Tuning either direction does the same thing. When I stop tuning the Big > Knob, it reverts to the slow back and forth about once per second. > > Wondering if there's something amiss in my K3. It works normally in all > other respects, and these signals do not appear anywhere else up to 29.5 > MHz. > > 73, > > Fred ["Skip"] K6DGW > Sparks NV DM09dn > Washoe County > __ > 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 ae...@worldwidedx.com -- Owner, worldwidedx.com AE6LX, Amateur Radio __ 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] Weird signal on 80m on K3 S/N 642
Fred - can you get access to another receiver, preferably not another K3? If you can, then unplug your K3 and see if that signal is present on the other rig. Might help pinpoint if the signal is from within your rig or external. 73, Jim / K7TXA > On Jul 20, 2021, at 4:43 PM, Lyn Norstad wrote: > > Fred - > > What you describe sounds like signals I have seen here emanating from a > medical facility about a mile away. It comes and goes, usually during normal > working hours but sometimes on weekends. > > I believe there are still some diagnostic machines in broad use that will > produce signals like that. > > Play detective, and check out anything within a mile or two. Some of these > machines, especially older ones, put out a pretty bodacious signal. Most are > higher frequency, but there are still some in use that could produce exactly > what you're seeing. > > 73 > Lyn, W0LEN > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen > Sent: Tuesday, July 20, 2021 4:36 PM > To: Elecraft Reflector > Subject: [Elecraft] Weird signal on 80m on K3 S/N 642 > > 1. Is this list still active? Seems like ages since I've seen any > activity. Wonder if foothill.net has it blocked? > > 2. I have a strange noise on 80. It consists of what appears on the P3 > to be two slightly fuzzy carriers about 3 kHz apart, about S5-6. > Sometimes that's all there is, but much of the time, the signal slides > back and forth between them forming a rope-like pattern. The pattern is > repeated about 25 kHz lower, and both are synchronized. The lower pair > is centered on 3518, the upper pair on 3542. > > I've done all the usual [K3 on battery/main breaker off], DFing some, > and I've searched down to 100 kHz and don't find it. My P3 is in fixed > tune mode so the noise display remains constant on the screen as I tune > across it. Then, I noticed that when I tune the K3, it disturbs the > steady back and forth, creating a much finer rope-like pattern. It is > totally repeatable, and happens on both the lower and upper signals. > Tuning either direction does the same thing. When I stop tuning the Big > Knob, it reverts to the slow back and forth about once per second. > > Wondering if there's something amiss in my K3. It works normally in all > other respects, and these signals do not appear anywhere else up to 29.5 > MHz. > > 73, > > Fred ["Skip"] K6DGW > Sparks NV DM09dn > Washoe County > __ > 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 l...@lnainc.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 w6...@me.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] Weird signal on 80m on K3 S/N 642
Fred - What you describe sounds like signals I have seen here emanating from a medical facility about a mile away. It comes and goes, usually during normal working hours but sometimes on weekends. I believe there are still some diagnostic machines in broad use that will produce signals like that. Play detective, and check out anything within a mile or two. Some of these machines, especially older ones, put out a pretty bodacious signal. Most are higher frequency, but there are still some in use that could produce exactly what you're seeing. 73 Lyn, W0LEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen Sent: Tuesday, July 20, 2021 4:36 PM To: Elecraft Reflector Subject: [Elecraft] Weird signal on 80m on K3 S/N 642 1. Is this list still active? Seems like ages since I've seen any activity. Wonder if foothill.net has it blocked? 2. I have a strange noise on 80. It consists of what appears on the P3 to be two slightly fuzzy carriers about 3 kHz apart, about S5-6. Sometimes that's all there is, but much of the time, the signal slides back and forth between them forming a rope-like pattern. The pattern is repeated about 25 kHz lower, and both are synchronized. The lower pair is centered on 3518, the upper pair on 3542. I've done all the usual [K3 on battery/main breaker off], DFing some, and I've searched down to 100 kHz and don't find it. My P3 is in fixed tune mode so the noise display remains constant on the screen as I tune across it. Then, I noticed that when I tune the K3, it disturbs the steady back and forth, creating a much finer rope-like pattern. It is totally repeatable, and happens on both the lower and upper signals. Tuning either direction does the same thing. When I stop tuning the Big Knob, it reverts to the slow back and forth about once per second. Wondering if there's something amiss in my K3. It works normally in all other respects, and these signals do not appear anywhere else up to 29.5 MHz. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County __ 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 l...@lnainc.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] Weird signal on 80m on K3 S/N 642
1. Is this list still active? Seems like ages since I've seen any activity. Wonder if foothill.net has it blocked? 2. I have a strange noise on 80. It consists of what appears on the P3 to be two slightly fuzzy carriers about 3 kHz apart, about S5-6. Sometimes that's all there is, but much of the time, the signal slides back and forth between them forming a rope-like pattern. The pattern is repeated about 25 kHz lower, and both are synchronized. The lower pair is centered on 3518, the upper pair on 3542. I've done all the usual [K3 on battery/main breaker off], DFing some, and I've searched down to 100 kHz and don't find it. My P3 is in fixed tune mode so the noise display remains constant on the screen as I tune across it. Then, I noticed that when I tune the K3, it disturbs the steady back and forth, creating a much finer rope-like pattern. It is totally repeatable, and happens on both the lower and upper signals. Tuning either direction does the same thing. When I stop tuning the Big Knob, it reverts to the slow back and forth about once per second. Wondering if there's something amiss in my K3. It works normally in all other respects, and these signals do not appear anywhere else up to 29.5 MHz. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County __ 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] 10-pin connector for KAT2
Correction, thanks to Chris who found it on Digikey: the part is WM2522-ND. Pins are sold separately. I overlooked the "Housings" category when I searched! Mea culpa, and 73, Mike, K8CN __ 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] 10-pin connector for KAT2
Chris, The part specified in the KAT2 manual for J8, the female 10-pin, dual row housing is a DigiKey part, WM2522, but I checked under that number and it comes up empty. Mouser has a similar part from Molex: https://www.mouser.com/ProductDetail/Molex/90160-0110?qs=KHty%2FoMxDPm42IR2IE4wEQ%3D%3D Not sure if that part comes with the female snap-in pins to which the wires are crimped/soldered. Elecraft may have that part in stock since the KAT2 is still available. Mike, K8CN __ 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] GIFT ITEMS
- This mail is in HTML. Some elements may be ommited in plain text. - Hi, Do you have an Account with Amazon?? Thank you, PJ __ 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] 10-pin connector for KAT2
Hello, Is there an easy source for the 10-pin connector for KAT2, or do I have to get it from Elecraft directly? Mine needs to be replaced. Thanks, Chris KM1B __ 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
