[Elecraft] OT: KL7UW QRV for 6m eme/ms
Although my 2m-eme system is down (until next summer), my 6m station is QRV with two 7-element LFA yagis and 1000w for eme/meteor scatter/50.313 (FT8). I am aware that KL7 is highly sought after for 6m WAS & DXCC. Look for my activity on ON4KST chat/50-MHz IARU Region 2 and pskreporter.com. I will have LOTW initialized soon. 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@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] KIO3B Main Board Repair
Received e-mail from Elecraft that my KIO3 board is being shipped. Cost of new digital board $187.50 + $17.50 shipping. So my K3 will be restored for operating JT65 on eme end of the month. Only my 2m-eme array and tower crashed two days ago in high winds. http://www.kl7uw.com/2m-eme_down_1.jpg BTW I got my KX3 running on digital modes by use of a Rigblaster NOMIC. I'll have a webpage up in a couple days with a description. http://www.kl7uw.com/techtopics.htm Anyone want to borrow Murphy for a few months! 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@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] [OT] Broken boom mic attachment on a CM-500
Jack, I have BOTH the CM-500 and the SB-45, as well as a Heil Proset. I like all three for different reasons. The CM-500 is comfortable, and has the best mic boom, it has an enormous output from the electret mic — nearly too much for my K3. I used it effectively with the K2. The SB-45 is very comfortable but has a flimsy mic boom that tends to wiggle when I move my head. I can wear it for hours. The Heil Proset has the best frequency response in the headphones, and has an HC-4 element, which is unobtanium today. My problem with it is it hurt my ears after wearing it for an hour. I fixed that problem recently by buying some oversize earopads from Brainwavz. It is now just as comfortable as the CM-500 or SB-45. > On Nov 1, 2020, at 5:31 PM, Jack Brindle via Elecraft > wrote: > > I bought a new CM-500 set on Amazon about two years ago. They feel great on > my head and work wonderfully. > In May I decided to try the Koss SB-45. Price was good (about $30 from > Amazon). They feel very similar to my Heil headset, meaning about the same as > putting my head in a vise. Simply too tight on my head, especially for > wearing them through a 48 hour contest. I went back to the CM-500s. I find it > worth paying the $60 from Amazon to get these instead of something else. > > 73! > Jack, W6FB > > >> On Nov 1, 2020, at 2:20 PM, Jim Brown wrote: >> >> On 11/1/2020 2:12 PM, Bill Frantz wrote: >>> What are the best replacement headsets these days. Someone said that the >>> CM-500 has changed for the worse in the last few years. >> >> Hi Bill, >> >> The only issue I've ever had with the CM500 has been a bad cable, and it's >> happened at least twice. I'm pretty clutzy, so hard on headsets. >> >> This piece I wrote for National Contest Journal several years ago includes >> model numbers a few Koss headsets that hams have liked. They're pretty much >> the same electrically. >> >> http://k9yc.com/ContestAudio.pdf >> >> 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 jackbrin...@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 aa...@arrl.net Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 __ 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] CM-500 - Replacing the ear cushions
The way to do is is actually quite simple: Loosen the three screws then pull the old cushion off; Do Not Remove the screws. Take the new ear cushion and Stretch the part that will go in the slot Then working quickly (before it stretches back) work it into the open slot. On the side with the cord you may need to remove the bottom screw to get enough clearance for the strain relief for the cord to fit. Retighten the screws and you are done. Here is a video showing how to do it on a pair of Sennheiser HD280 that may help https://youtu.be/zUtC-MatRD8 Note: CM-500 have screws that clamp down on the ear cushions and Sennheiser's do not, but the technique is similar. __ 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] CM-500
Holding them together was not a problem for me. The problem was when they were apart, trying to get the replacement ear cushion onto the driver without ever putting stress on the teeny wires connected to the driver. Clamps don’t really help with that. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Nov 3, 2020, at 2:54 PM, Don Wilhelm wrote: > > As any woodworker knows, that is what clamps are for - they provide that > extra hand often needed. > Also, the woodworker's mantra is "you can never have too many clamps" - I > have often found that is true. > > There are large and quite small clamps. > > 73, > Don W3FPR > > On 11/3/2020 4:55 PM, Paul Ferguson wrote: >> I found it rather difficult to install replacement ear pads on the >> CM-500. It seemed I did not have enough hands to hold all the parts >> together when trying to align things and reinstall the 3 screws. > __ > 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 wun...@wunderwood.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] CM-500
As any woodworker knows, that is what clamps are for - they provide that extra hand often needed. Also, the woodworker's mantra is "you can never have too many clamps" - I have often found that is true. There are large and quite small clamps. 73, Don W3FPR On 11/3/2020 4:55 PM, Paul Ferguson wrote: I found it rather difficult to install replacement ear pads on the CM-500. It seemed I did not have enough hands to hold all the parts together when trying to align things and reinstall the 3 screws. __ 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] CM-500
I found it rather difficult to install replacement ear pads on the CM-500. It seemed I did not have enough hands to hold all the parts together when trying to align things and reinstall the 3 screws. This article "Replacement Ear Pads for the CM500 Headset" by - Mike N4CF in the May 2020 PVRC newsletter worked well for me: https://www.pvrc.org/Newsletters/2020_05.pdf 73, Paul K5ESW > I'd highly recommend Velour pads as opposed to OEM or equivalent that > start flaking way sooner than you expect. > I've put them on three different Sony MDR-7506 headphones. > They are much more comfortable and wear quite well (no pun intended). > > Poke around some. Velour pads are available for many brands. I'm sure > they're made for the CM-500's > > 73, Charlie k3ICH > > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > On Behalf Of Jim Brown Sent: Monday, > November 02, 2020 5:05 PM To: elecraft@mailman.qth.net Subject: Re: > [Elecraft] [OT] Broken boom mic attachment on a CM-500 > > On 11/2/2020 1:50 PM, Alan - G4GNX wrote: > > Unfortunately the ear pads are starting to deteriorate. Have you had > > to replace yours? > > No, and I've never seen much wear. > > > I read somewhere that new separate > > pads are not available. > > Right, they're not user replaceable, nor is the cable. > > The earpads for my Sony MDR7506 phones are user replaceable, but the > cable is not. I've owned several sets of them that I've used for many > years, and never had a problem with the cord, but I did buy a set for $5 > at a ham flea market with a bad cable. :) > > Some of the German headphones have user replaceable cables, especially > those used for stage intercom and by broadcasters, but they're not > nearly as comfortable, don't sound nearly as good, and are fairly > exp0ensive. Beyer, AKG, and Sennheiser make some very nice phones -- > they're first rate manufacturers. I have a pair of Beyer DT880Pro that I > like for listening to acoustic music, mostly jazz. > > 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 pin...@erols.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 p...@paulferguson.us __ 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] K4 Input Power
Wayne Just looking at the updated manuals and wanted to know about the DC input power range limits. On page 4 of the new update its says power of 13.8 to 14.2V preferred. I have been running my K3s with an input power of 14.8V based on IMD tests I have done. What is the safe range for DC input and is the 14.2V recommendation based on an IMD sweet spot or can I leave my existing supply at 14.8V. I can adjust down to 14.2V if that is better operating point. Thanks for updates on docs. de Dave K5MWR On 11/2/2020 10:18, Wayne Burdick wrote: On Nov 2, 2020, at 7:51 AM, Jim Miller wrote: This is mentioned in the online manual. However there's no suggestion as to how it would interact with an external device. Obviously some code inside the K4 would need to do some signalling, perhaps written by an approved ISV. How would it physically transmit commands? USB, Ethernet? USB, Ethernet, or RS232. There's no limit on how this could be done, but it hasn't been added yet. Do you have a particular antenna switch or other device in mind? It could also be a rotator, etc. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to do...@suddenlink.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] K4 Remote Antenna button
Wayne Just looking at the updated manuals and wanted to know about the DC input power range limits. On page 4 of the new update its ays power of 13.8 to 14.2V preferred. I have been running my K3s with an input power of 14.8V based on IMD tests I have done. What is the safe range for DC input and is the 14.2V recommendation based on an IMD sweet spot or can I leave my existing supply at 14.8V. I can adjust down to 14.2V if that is better operating point. Thanks for updates on docs. de Dave K5MWR On 11/2/2020 10:18, Wayne Burdick wrote: On Nov 2, 2020, at 7:51 AM, Jim Miller wrote: This is mentioned in the online manual. However there's no suggestion as to how it would interact with an external device. Obviously some code inside the K4 would need to do some signalling, perhaps written by an approved ISV. How would it physically transmit commands? USB, Ethernet? USB, Ethernet, or RS232. There's no limit on how this could be done, but it hasn't been added yet. Do you have a particular antenna switch or other device in mind? It could also be a rotator, etc. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to do...@suddenlink.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] [OT] Broken boom mic attachment on a CM-500
I solved the CM-500 pad wear problem by getting some black Geekria cloth covers from Amazon. They fit snugly around the pads. On the right side the top of the cover tended to slide down until I got out a needle and thread and tied the edges together on the outside of the headset, just under the R. Now the pads should last a long time. The covers come as two pairs. I have not replaced the first pair after a couple of years. They show no wear at all. 73, Jim W6YA __ 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] CM-500
Thanks Charlie. Fortunately the flaking is only around the periphery, not the part that touches the ear, so I have a little time yet. I'll do a search for Velour and see what I can find. 73, Alan. G4GNX -- Original Message -- From: "Charlie T" To: elecraft@mailman.qth.net Sent: 03/11/2020 03:29:37 Subject: Re: [Elecraft] CM-500 I'd highly recommend Velour pads as opposed to OEM or equivalent that start flaking way sooner than you expect. I've put them on three different Sony MDR-7506 headphones. They are much more comfortable and wear quite well (no pun intended). Poke around some. Velour pads are available for many brands. I'm sure they're made for the CM-500's 73, Charlie k3ICH __ 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] CM-500
I'd highly recommend Velour pads as opposed to OEM or equivalent that start flaking way sooner than you expect. I've put them on three different Sony MDR-7506 headphones. They are much more comfortable and wear quite well (no pun intended). Poke around some. Velour pads are available for many brands. I'm sure they're made for the CM-500's 73, Charlie k3ICH -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Jim Brown Sent: Monday, November 02, 2020 5:05 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500 On 11/2/2020 1:50 PM, Alan - G4GNX wrote: > Unfortunately the ear pads are starting to deteriorate. Have you had > to replace yours? No, and I've never seen much wear. > I read somewhere that new separate > pads are not available. Right, they're not user replaceable, nor is the cable. The earpads for my Sony MDR7506 phones are user replaceable, but the cable is not. I've owned several sets of them that I've used for many years, and never had a problem with the cord, but I did buy a set for $5 at a ham flea market with a bad cable. :) Some of the German headphones have user replaceable cables, especially those used for stage intercom and by broadcasters, but they're not nearly as comfortable, don't sound nearly as good, and are fairly exp0ensive. Beyer, AKG, and Sennheiser make some very nice phones -- they're first rate manufacturers. I have a pair of Beyer DT880Pro that I like for listening to acoustic music, mostly jazz. 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 pin...@erols.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 on 2m: AGC OFF / Meteor Scatter : weird behavior
Hello, I'm using my K3s with the internal K144XV on 2m, currently focusing on Meteor Scatter with FSK144. Due to the transient nature of Meteor Scatter bursts/pings, the best AGC setting is OFF, as the AGC would flatten the signal, potentially impacting decoding. In MS we RX 30s and send the next 30s; the weird behavior I'm observing is that the RX audio level on the USB souncard output is varying between RX periods, i.e. the AF level changes up and down (around 10dB) between different RX periods. The AF level stays the same within the same period. I initially suspected some relay issue (PA / LNA) but I've tested everything including a different receiver with AGC off and the problem is definitely the K3. Any hint what may be happening ? I've tried changing the AF Lim value but that only seems to have an effect on the Loudspeaker audio, not on the USB soundcard. 73 Marco HB9CAT __ 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
