Re: [Elecraft] Testing
Could it be that many of the posts that would have been on this reflector are now being posted on a couple of K4 lists that I understand exist? David K0LUM > On Apr 10, 2021, at 8:25 AM, Mike K8CN wrote: > > Don, > > I've observed that the rate of new posts has gone down (no scientific > estimate, just a gut sense based on daily checks of the forum). I have no > speculation as to why. > > 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] Testing
Don, I've observed that the rate of new posts has gone down (no scientific estimate, just a gut sense based on daily checks of the forum). I have no speculation as to why. 73, Mike, K8CN -- Sent from: http://elecraft.365791.n2.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] Testing
Don, (good keyboard copy) 599 here... has many of the mails gone to elecraft-K4 and elecraft-KX3 ?? I personally "killed" my -K4 account, too much junk guessing when their K4 will be delivered... and did "someone" really say "by the end of May?" 73, steve WB3LGC On 4/9/21 11:49 AM, Don Wilhelm wrote: Just testing - I have not seen many posts over the last month 73, Don W3FPR __ 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 sm.shearer...@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] Testing
Just testing - I have not seen many posts over the last month 73, Don W3FPR __ 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] Testing
Major CW contest on ... all is quiet Paul KB9AVO On Sat, Jan 9, 2021 at 8:01 PM Wayne Burdick wrote: > Hi David, > > Works fine here. > > I've been working the NA CW contest. 40 m in particular is hopping. Gave > me a chance to test a lot of K4 software refinements we've been working on. > > 73, > Wayne > N6KR > > > > On Jan 9, 2021, at 4:27 PM, David Herring wrote: > > > > Just testing...I seem to have not received anything from this list since > yesterday morning. Sorry for any inconvenience. > > > > 73, > > David - N5DCH > > > __ > 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 pvandyke1...@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] Testing
Hi David, Works fine here. I've been working the NA CW contest. 40 m in particular is hopping. Gave me a chance to test a lot of K4 software refinements we've been working on. 73, Wayne N6KR > On Jan 9, 2021, at 4:27 PM, David Herring wrote: > > Just testing...I seem to have not received anything from this list since > yesterday morning. Sorry for any inconvenience. > > 73, > David - N5DCH __ 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] Testing
Just testing...I seem to have not received anything from this list since yesterday morning. Sorry for any inconvenience. 73, David - N5DCH __ 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] Testing
I was given my Conditional Test by W4MLE(SK) in 1960. He was also my Elmer and a great guy. Vy 73 de Bob DJ0RD/WU5T __ 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] Testing IMD3 (dB) K3S (#10490)
> hb9...@hispeed.ch wrote: > > Can anyone roughly confirm IMD3 K3S ? Andy, I'm sorry that your testing showed low TX IMD. Typically all HF bands are in the low 30s (i.e., -30 dBc or better, using the ARRL method, with Vsupply = 14 V). This is similar to that of other transceivers using the same MOSFET PA design. 6 meters is tested at a lower power level per the current specifications (I believe it's 1 dB below 100 W). If yours is worse than the low 30s on one HF band, 20 m in your case, there are a few possibilities. It could be that the 20 meter LPF is not optimized, or that the voltage regulator supplying 5 V to the bias circuitry is off by some amount relative to the normal value. If you sent the radio in at the time of the module swap, our techs should have caught this in final test. If you did the swap yourself, then one of the above issues may apply. Either way, I've asked customer support to contact you, and we'll be happy to cover the cost of any replacement parts on the radio or the modules. 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 arch...@mail-archive.com
[Elecraft] Testing, please ignore
Test. __ 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] testing
Looks good now! On 7/16/19 10:56 AM, Gary Tuck via Elecraft wrote: trying to find secret to posting. I’ve been doing something wrong. 73, Gary W7TEA __ 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 d...@nk7z.net -- 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Technical Specialist ARRL Volunteer Examiner ARRL Asst. Director, NW Division, Technical Resources __ 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] testing
trying to find secret to posting. I’ve been doing something wrong. 73, Gary W7TEA __ 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] TESTING
Testing...thanks! 73, Jim W5LA __ 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] Testing
In case I didn't mention it to the group: My ISP had set spam filtering to "extreme" and was blocking all of my list servers. All of the messages were still there in quarantine on my webmail server which I never use. My normal client is Thunderbird which is clueless in this case. Thanks for all the private replies. Wee On 1/14/2019 5:05 PM, Wes Stewart wrote: I've been having a problem were my posts are either not making it to the reflector or are not coming back to me as a copy, even though they always have and that is my preference in settings. Will someone let me know if they see this post. One person will be plenty. Thanks 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 donw...@embarqmail.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] Testing
Many thanks to all who replied. My ISP had set spam filtering to "extreme" and was blocking all of my list servers. All of the messages were still there in quarantine on my webmail server which I never use. My normal client is Thunderbird which is clueless in this case. Supposedly they've fixed it. Wes N7WS On 1/14/2019 3:22 PM, Jim Finan wrote: Saw it! No answers... Jim Finan AB4AC S __ 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] Testing
Saw it! No answers... Jim Finan AB4AC Sent from my BlackBerry - the most secure mobile device Original Message From: wes_n...@triconet.org Sent: January 14, 2019 5:06 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] Testing I've been having a problem were my posts are either not making it to the reflector or are not coming back to me as a copy, even though they always have and that is my preference in settings. Will someone let me know if they see this post. One person will be plenty. Thanks 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 jimfi...@att.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
[Elecraft] Testing
I've been having a problem were my posts are either not making it to the reflector or are not coming back to me as a copy, even though they always have and that is my preference in settings. Will someone let me know if they see this post. One person will be plenty. Thanks 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] Testing email
Thanks. Dick, n0ce __ 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] Testing Reflector
You are correct Jim. When I was trying to get information onto the reflector about my K3 audio problems, some of my emails too two to three days to appear. At one point I thought the moderator was monitoring my post, but I guess that was not the case. But randomly it is very SLOW! 73, Tom - W4BQF -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Bennett Sent: Thursday, October 24, 2013 1:40 PM To: Elecraft Reflector Reflector Subject: [Elecraft] Testing Reflector My posts are not going through - wondering what's up.? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing Reflector
My posts are not going through - wondering what's up.? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing propogation to list, please ignore
Test, ignore please. -- Best regards, Chris Wilson. mailto: ch...@chriswilson.tv __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing
__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Testing of 2 rigs on the same band, incl K3
I guess that that noise VFO in K3 makes selective VRF or microtune features of Yaesu not needed. Also shutting of input at high RF level prevents burning of RX input. Smart features that pay with contesters' loyalty. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/Testing-of-2-rigs-on-the-same-band-incl-K3-tp7564970p7564985.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Testing of 2 rigs on the same band, incl K3
Eric, et al, A couple of years ago at the Salina, Kansas hamfest, Dwight (N3ARU) and I did a similar test without all the antenna modeling, signal generator testing and with much closer antenna spacing using a pair of home made PAC-12 verticals on 20 meters. The verticals were just over 40 feet apart and the only isolation consideration was that one antenna was sited barely around the corner of a concrete and steel building from the other one. The rigs were our two K3's with Dwight running 100 watts of SSB on 20 and I was running 100 watts of CW and sometimes 100 watts of RTTY, demonstrating the two rigs and the non-interference capability. I did have the 400 Hz 8 pole filter switched in on the CW station and Dwight was using the stock 5 pole SSB filter. To add to the mix, we also had David, KD0R running his K2 at some power between 5 and 10 watts (I don't remember exactly now) on CW somewhere in the 20 meter band as well. David's antenna was a wire dipole taped to the wall of the bu ilding about 10 feet or so behind the table on which all three rigs were operating. The K2 got a little interference from both of the K3's but would still have been usable in a real-world situation and neither K3 had any interference from each other or from the K2 which speaks very well for the almost lack of phase noise in the K2 as well. I had a P3 connected to my K3 and I could tell when both Dwight and David were transmitting by watching the P3's baseline, but no artifacts or blocking was detectable by ear (granted it was a fairly noisy environment) in either K3. I don't remember now what frequency separation was necessary between either K3 and the K2 to eliminate interference to the K2, but it wasn't a tremendous amount and it was able to co-exist with the K3's on the 20 meter band during the hamfest. Not sure how many sales we generated for Elecraft that day, but there were a large number of people that were shaking their heads in almost disbelief that the reports they had heard previously of this capability of the K3 weren't just "smoke and mirrors". Quite a few of them came back several times to discuss the rigs and all left with the literature handouts. Jim Sheldon - W0EB > Nice real world interference test of IMD/Blocking and phase noise > between 2 K3s operating in the same band versus other rigs for > Field Day > and contesting use. > > http://www.w0qe.com/Technical_Topics/phase_noise_and_overload_testing. > html > > 73, > Eric > --- > www.elecraft.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing of 2 rigs on the same band, incl K3
Nice real world interference test of IMD/Blocking and phase noise between 2 K3s operating in the same band versus other rigs for Field Day and contesting use. http://www.w0qe.com/Technical_Topics/phase_noise_and_overload_testing.html 73, Eric --- www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing, please disregard
I am testing setting changes. Rich, n0ce __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing
The last two posts I have sent regarding the use of silicone have not been posted. Richard Fjeld, N0CE rpfj...@embarqmail.com I'd rather be learning. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing
This is just a test. -- R. Kevin Stover AC0H __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] testing
Just a test of the connection. -- Using Opera's revolutionary email client: http://www.opera.com/mail/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Testing anti-static mats - found one that works
How are you measuring resistance? Matt W8ESE On Wed, Apr 7, 2010 at 6:53 PM, Alan Bloom wrote: > It is important to use an anti-static mat to prevent damage to > electronic devices when working on solid-state equipment. Since > Elecraft is heavily kit-oriented this is a topic of interest for > Elecrafters. > > Quite some time ago I did some testing on the Radio Shack portable > anti-static mat and found that its resistance was way too high to do a > proper job of bleeding off static charges. I then bought another > low-cost mat from Jameco and it also measured way too high. I began to > doubt my testing methodology (described in a previous message, copied > below). > > So now I have bought a third mat. This one is more expensive, but > unlike the cheaper mats it has an actual data sheet that specifies that > it meets ANSI specs for anti-static performance. I figured if it also > measured bad then my testing must be in error. > > But it didn't. Here are the results: > > Radio Shack P/N 276-2370 ($22.99) - 26 G ohms (26,000 M ohms) > Jameco P/N 10584 ($16.45) - 44 G ohms (44,000 M ohms) > Digi-Key P/N 16-1121-ND, (Desco 66164) ($38.18) - 41 M ohms > > The Desco mat's resistance is about 1000x lower than the cheaper ones! > > This mat is quite large, (2 x 3 feet, 61 x 91.4 cm) so if you buy one > you may need to cut it down to fit on your workbench. It comes with a > "common point ground kit" (that you have to install on the mat yourself) > that provides a long wire with solder lug to connect to ground and a > two-socket connector for connecting one or two wrist straps. The wrist > strap and cord have to be purchased separately. It looks like Digi-Key > P/N SCP172-ND for $8.95 should work. > > So the total cost is about $47. But the cheap mats are no bargain if > they don't work. > > I tried cleaning the surface of the mats with some wipes that are > especially intended for cleaning anti-static mats (Digi-Key MTT20-ND) > and they did help. The Radio Shack mat went from 26 to 6 Gohms and the > Jameco went from 44 to about 12 Gohms. But those numbers are still way > too high. The Desco mat's resistance also went down, from 41 to 20 > Mohms. > > The Desco mat came with a small spray bottle of "Rezstore", their own > brand of mat cleaner. > > By the way, the back side of the Desco mat is some kind of > highly-conductive black rubber, apparently to keep the entire mat > surface at equal potential. They warn that you should always use it > blue side up because the resistance of the back side is too low. Sure > enough, it was low enough to measure with my digital multimeter - about > 80 kohms. > > So my recommendation is to buy a mat such as the Desco model that has a > data sheet that specifies that it meets ANSI/ESD S4.1 or ANSI/ESD > S20.20. If you already have the Radio Shack mat, then either replace it > or at least clean it with a cleaner approved for ESD mats. (You're not > supposed to use soap or detergent because it might harm the anti-static > properties.) Gary KI4GGX recommends a product made by Techspray: > http://www.all-spec.com/products/1733-QT.html > > Whatever you use, it is important to keep the mat clean. > > A word about my test procedure. Accuracy is not very good because I am > trying to read the peak amplitude of a brief needle flicker. If I had > an analog meter with a high-impedance input that would work better > because the reading wouldn't change so fast. Also my sauce pans no > doubt do not give the same answer as the ANSI-specified test probes. So > overall, I doubt my measurement accuracy is better than +/- 50% or so. > But for the purposes of this test that's good enough. > > In the test procedure below I had to substitute a 1.0 uF capacitor when > measuring the Tesco mat in order to get a long-enough time constant to > measure accurately. (Also, it's actually a Triplett meter, not a > Simpson.) > > Alan N1AL > > > > On Wed, 2008-02-27 at 09:51 -0800, Alan Bloom wrote: >> Well, I've convinced myself that the Radio Shack portable ESD mat, P/N >> 276-2370 doesn't work properly. >> >> The "ESD Association" http://www.esda.org has promulgated an >> industry-standard test for ESD mats, ESD S4.1. It is the standard >> specified by most commercial mats. I decided not to spring for the $70 >> to buy a copy of the standard, but other information I found on the web >> describes the test in general terms. It uses two circular electrodes, >> each weighted with 5 pounds, spaced 10 inches apart on the mat. The >> "Point to Point Resistance" is specified to be: >> >> At 40-60% RH: 10^6 - 10^7 ohms >> At 20-40% RH: 10^7 - 10^8 ohms >> At 10-20% RH: 10^8 - 10^9 ohms >> >> I don't know what the RH here in Santa Rosa was yesterday when I did the >> test, but I don't think it was very low since it has been raining >> recently and the ground is still damp. For sure the resistance >> shouldn't be below 10^9 ohms (1 gigohm) and probably more like 10^8 or >> 10^7 (100 or 10
[Elecraft] Testing anti-static mats - found one that works
It is important to use an anti-static mat to prevent damage to electronic devices when working on solid-state equipment. Since Elecraft is heavily kit-oriented this is a topic of interest for Elecrafters. Quite some time ago I did some testing on the Radio Shack portable anti-static mat and found that its resistance was way too high to do a proper job of bleeding off static charges. I then bought another low-cost mat from Jameco and it also measured way too high. I began to doubt my testing methodology (described in a previous message, copied below). So now I have bought a third mat. This one is more expensive, but unlike the cheaper mats it has an actual data sheet that specifies that it meets ANSI specs for anti-static performance. I figured if it also measured bad then my testing must be in error. But it didn't. Here are the results: Radio Shack P/N 276-2370 ($22.99) - 26 G ohms (26,000 M ohms) Jameco P/N 10584 ($16.45) - 44 G ohms (44,000 M ohms) Digi-Key P/N 16-1121-ND, (Desco 66164) ($38.18) - 41 M ohms The Desco mat's resistance is about 1000x lower than the cheaper ones! This mat is quite large, (2 x 3 feet, 61 x 91.4 cm) so if you buy one you may need to cut it down to fit on your workbench. It comes with a "common point ground kit" (that you have to install on the mat yourself) that provides a long wire with solder lug to connect to ground and a two-socket connector for connecting one or two wrist straps. The wrist strap and cord have to be purchased separately. It looks like Digi-Key P/N SCP172-ND for $8.95 should work. So the total cost is about $47. But the cheap mats are no bargain if they don't work. I tried cleaning the surface of the mats with some wipes that are especially intended for cleaning anti-static mats (Digi-Key MTT20-ND) and they did help. The Radio Shack mat went from 26 to 6 Gohms and the Jameco went from 44 to about 12 Gohms. But those numbers are still way too high. The Desco mat's resistance also went down, from 41 to 20 Mohms. The Desco mat came with a small spray bottle of "Rezstore", their own brand of mat cleaner. By the way, the back side of the Desco mat is some kind of highly-conductive black rubber, apparently to keep the entire mat surface at equal potential. They warn that you should always use it blue side up because the resistance of the back side is too low. Sure enough, it was low enough to measure with my digital multimeter - about 80 kohms. So my recommendation is to buy a mat such as the Desco model that has a data sheet that specifies that it meets ANSI/ESD S4.1 or ANSI/ESD S20.20. If you already have the Radio Shack mat, then either replace it or at least clean it with a cleaner approved for ESD mats. (You're not supposed to use soap or detergent because it might harm the anti-static properties.) Gary KI4GGX recommends a product made by Techspray: http://www.all-spec.com/products/1733-QT.html Whatever you use, it is important to keep the mat clean. A word about my test procedure. Accuracy is not very good because I am trying to read the peak amplitude of a brief needle flicker. If I had an analog meter with a high-impedance input that would work better because the reading wouldn't change so fast. Also my sauce pans no doubt do not give the same answer as the ANSI-specified test probes. So overall, I doubt my measurement accuracy is better than +/- 50% or so. But for the purposes of this test that's good enough. In the test procedure below I had to substitute a 1.0 uF capacitor when measuring the Tesco mat in order to get a long-enough time constant to measure accurately. (Also, it's actually a Triplett meter, not a Simpson.) Alan N1AL On Wed, 2008-02-27 at 09:51 -0800, Alan Bloom wrote: > Well, I've convinced myself that the Radio Shack portable ESD mat, P/N > 276-2370 doesn't work properly. > > The "ESD Association" http://www.esda.org has promulgated an > industry-standard test for ESD mats, ESD S4.1. It is the standard > specified by most commercial mats. I decided not to spring for the $70 > to buy a copy of the standard, but other information I found on the web > describes the test in general terms. It uses two circular electrodes, > each weighted with 5 pounds, spaced 10 inches apart on the mat. The > "Point to Point Resistance" is specified to be: > > At 40-60% RH: 10^6 - 10^7 ohms > At 20-40% RH: 10^7 - 10^8 ohms > At 10-20% RH: 10^8 - 10^9 ohms > > I don't know what the RH here in Santa Rosa was yesterday when I did the > test, but I don't think it was very low since it has been raining > recently and the ground is still damp. For sure the resistance > shouldn't be below 10^9 ohms (1 gigohm) and probably more like 10^8 or > 10^7 (100 or 10 megohms). > > I measured 2.5 x 10^10 ohms (25 gigohms), which puts the Radio Shack mat > way out of spec. > > Test procedure: > > I didn't find a specification on the electrode size, but in the photo of > a popular tester they look to be maybe 3 or 4 inches in
Re: [Elecraft] Testing my DSP
Yes it was my mistake,NR will not work when AGC is OFF,my apology. AD4C "For a refined ham it is compulsory to own a k3" --- On Wed, 2/17/10, Philippe Trottet wrote: From: Philippe Trottet Subject: Re: [Elecraft] Testing my DSP To: elecraft@mailman.qth.net, "Hector Padron" Date: Wednesday, February 17, 2010, 4:38 AM Yes hector but you mentioned on the previous your AGC for cw is off. When AGC is off the NR is deactivated on the K3 Am I wrong ? 73's Philippe A65BI K3#33616 *Elecraft, by Hams for Hams...What else ? >>> Hector Padron 17-02-2010 8:16 >>> You can hear my DSP working in CW on this link,the station signal was 579 on 40M,the noise is cancelled almost complete,the settings used for NR was F1-3 http://www.ad4c.us/Elecraft%20K3/shared%20files%20from%20K3%20users/AD4C%20recordings%20on%20his%20K3/CW%20station%20turning%20NR%20ON%20and%20OFF%20several%20times.mp3 AD4C "For a refined ham it is compulsory to own a 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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Testing my DSP
Yes hector but you mentioned on the previous your AGC for cw is off. When AGC is off the NR is deactivated on the K3 Am I wrong ? 73's Philippe A65BI K3#33616 *Elecraft, by Hams for Hams...What else ? >>> Hector Padron 17-02-2010 8:16 >>> You can hear my DSP working in CW on this link,the station signal was 579 on 40M,the noise is cancelled almost complete,the settings used for NR was F1-3 http://www.ad4c.us/Elecraft%20K3/shared%20files%20from%20K3%20users/AD4C%20recordings%20on%20his%20K3/CW%20station%20turning%20NR%20ON%20and%20OFF%20several%20times.mp3 AD4C "For a refined ham it is compulsory to own a 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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing my DSP now on SSB
Same test as in CW but now on SSB with the NR set at F5-3 FW version 3.76 http://www.ad4c.us/Elecraft%20K3/shared%20files%20from%20K3%20users/AD4C%20recordings%20on%20his%20K3/Russian%20station%20on%2040M%20without%20and%20width%20the%20NR.mp3 AD4C "For a refined ham it is compulsory to own a k3" --- On Wed, 2/17/10, Hector Padron wrote: From: Hector Padron Subject: [Elecraft] Testing my DSP To: elecraft@mailman.qth.net Date: Wednesday, February 17, 2010, 4:16 AM You can hear my DSP working in CW on this link,the station signal was 579 on 40M,the noise is cancelled almost complete,the settings used for NR was F1-3 http://www.ad4c.us/Elecraft%20K3/shared%20files%20from%20K3%20users/AD4C%20recordings%20on%20his%20K3/CW%20station%20turning%20NR%20ON%20and%20OFF%20several%20times.mp3 AD4C "For a refined ham it is compulsory to own a 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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing my DSP
You can hear my DSP working in CW on this link,the station signal was 579 on 40M,the noise is cancelled almost complete,the settings used for NR was F1-3 http://www.ad4c.us/Elecraft%20K3/shared%20files%20from%20K3%20users/AD4C%20recordings%20on%20his%20K3/CW%20station%20turning%20NR%20ON%20and%20OFF%20several%20times.mp3 AD4C "For a refined ham it is compulsory to own a 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
Re: [Elecraft] Testing the New K3 audio mix feature
This is exactally what I was asking for about a year ago... > Date: Thu, 29 Oct 2009 23:52:32 + > From: w...@cox.net > To: elecraft@mailman.qth.net > Subject: [Elecraft] Testing the New K3 audio mix feature > > The new audio mix feature for dual receiving is great, but I have a > suggestion to improve it. Right now the mix doesn't show any right-left > perception, apparently due to full mix between channels. Signals from > both main and sub appear directly in front, so it's hard to tell which > channel is which. It's desirable to have the sub appear a bit to the > right, and the main a bit to the left. Then it's easy to ID which > receiver you're listening to, regardless of the setting of the balance > control. > > The FT-1000D is a good example of how this can be done with partial mix, > giving a perception of listening to separate channels. The sub audio > appears a little to the right, and the main audio appears a bit to the > left. That's still far, far better than complete stereo separation in > my book. Yaesu apparently used about 25% mix to give this spacial > perception, acc. to K7JA. If this feature is installed, it ought to > capture the last of the FT-1000D holdouts. The FT-1000D is still a fine > radio. > > 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 _ New Windows 7: Find the right PC for you. Learn more. http://www.microsoft.com/windows/pc-scout/default.aspx?CBID=wl&ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_pcscout:102009 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Testing the New K3 audio mix feature
The new audio mix feature for dual receiving is great, but I have a suggestion to improve it. Right now the mix doesn't show any right-left perception, apparently due to full mix between channels. Signals from both main and sub appear directly in front, so it's hard to tell which channel is which. It's desirable to have the sub appear a bit to the right, and the main a bit to the left. Then it's easy to ID which receiver you're listening to, regardless of the setting of the balance control. The FT-1000D is a good example of how this can be done with partial mix, giving a perception of listening to separate channels. The sub audio appears a little to the right, and the main audio appears a bit to the left. That's still far, far better than complete stereo separation in my book. Yaesu apparently used about 25% mix to give this spacial perception, acc. to K7JA. If this feature is installed, it ought to capture the last of the FT-1000D holdouts. The FT-1000D is still a fine radio. 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
[Elecraft] TESTING
TESTING REFLECTOR POST - THANKS Jerry Give someone a lift. Click now to donate an automobile! http://thirdpartyoffers.juno.com/TGL2131/fc/PnY6rbvSZNEUq6WjMhdCrtDIiI4sqePQHKCAi9hoB5mthC2lsfaKW/___ 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] testing
Looks like my internet server is having problems as I haven't seen any traffic the past few days on here. Fern ___ 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] TESTING question
Hello Brian Yes, I'd set up the filters and satisfy yourself the K3 is working before updating the firmware. You can set the filters and save the config from the updater program, saving the config will give you peace of mind in case something goes wrong. The latest beta firmware has significantly improved noise reduction compared to what will be in your K3, so I wouldn't hesitate to recommend you download the 2.10 firmware. You need to also tick the box for "always load DSP data tables" as you can end up with funny faults with the DSP if you don't. Welcome to the world of the K3! 73 Dave, G4AON K3/100 #80 - Is this now the time to download the latest firmware? Rather do the xtal filter setup there since have four filters. Any tips on using the config program. Not interested in any beta software at this point. 73 de Brian/K3KO ___ 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] TESTING question
#1129 is alive. Synthesizer calibration done. First time ERR 00022. Turn off/on and redo and no errors. All bands show no PLL errors. Is this now the time to download the latest firmware? Rather do the xtal filter setup there since have four filters. Any tips on using the config program. Not interested in any beta software at this point. 73 de Brian/K3KO -- View this message in context: http://www.nabble.com/TESTING-question-tp18170433p18170433.html Sent from the Elecraft mailing list archive at Nabble.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] testing post
i have been trying to post for the past few hours that isn't making it past the filters.. checking to see if this gets through.. sorry for the inconvenience.. 73 de kb8qpt ___ peace, sergio photographer, journalist, visionary www.village-buzz.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] testing
-.- -.-. . .-- .- ___ 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] Testing
Maybe setting up for plain text will make the difference. Don't know how it got changed. Trying to fix my email folks. Sorry for the bandwidth. Stan Rife W5EWA Houston, TX K2 S/N 4216 ___ 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] Testing
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Just a test. I haven't received any mail for the last day or so. - -- R. Kevin Stover, ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG/3ic11jxjloa2wsRAsHbAKCG3BX0gpx6W+TiXiJsbRgL4pfBeQCg0BWm lL1J3PIjwBv51Ub2Na9vwOI= =FZTT -END PGP SIGNATURE- ___ 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] Testing again.
It looks like elecraft@mailman.qth.net is having a problem. My last 2 replies have not been posted in the last 2 hours. Just checking to see if anything gets through. 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] Testing the reflector
On Mon, 29 Jan 2007, Ron D'Eau Claire wrote: And they say e-mail is more reliable that point-to-point contact on the shortwaves... Hrumph! Not to burst your bubblebut if we maintained our radios and antenna systems as poorly as some ISPs maintain their DNS records and servers, you'd have similar problems. 73,Thom-k3hrn www.zerobeat.net Home of QRP Web Ring, Drakelist home page,Drake Web Ring, QRP IRC channel, Drake IRC Channel, Elecraft Owners Database www.tlchost.net/hosting/ *** Web Hosting as low as 3.49/month ___ 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] Testing the reflector
It looks like the mail reflector is back up. QTH.NET and QSL.NET and their associated e-mail reflectors were off line for *some* areas of the world for the past several days, while others reported normal activity! The last message I received before this morning was from 1/25/2007. And they say e-mail is more reliable that point-to-point contact on the shortwaves... Hrumph! Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm Sent: Monday, January 29, 2007 7:26 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Testing the reflector A few posts have come through, just checking. 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] Testing the reflector
Hello Don, I'vre not been able to post for a couple of days ... 73! Ken Kopp - K0PP [EMAIL PROTECTED] or [EMAIL PROTECTED] ___ 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] Testing the reflector
A few posts have come through, just checking. 73, Don W3FPR -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.17.12/655 - Release Date: 1/28/2007 1:12 PM ___ 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] TESTING
Test message. 73, Ken K3IU ___ 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] Testing I keep getting two copies of every email
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Sent: Friday, March 17, 2006 4:45 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Testing I keep getting two copies of every email Test ___ 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
[Elecraft] Testing I keep getting two copies of every email
Test ___ 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] Testing
Found out the hard way, I can't send a picture thru the reflector. Now just trying to see if I am back to normal. Happy Hammin' Jim, W4ATK ___ 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] Testing the compressor on K2 #4913
Ken; The compressor uses a power detector to measure the power level and it then uses that to set the audio gain. This results in no distortion of the audio signal. It is possible to run digital modes such as PSK31 through the compressor without adding any significant distortion to them. It is also possible to increase the compression level up to 16:1 by changing a resistor value. I'm not sure I would recommend that because every background noise in your shack could be transmitted at full output power. -John KI6WX - Original Message - From: "Ken Bessler" <[EMAIL PROTECTED]> Is the design of the K2's compressor so that even at 4:1, it's not too harsh? I've been using 2:1 for normal ops and 4:1 for difficult contacts. My mic is an old CB "Cobra" hand mic (600 ohm). I also have a headset mic salvaged from a cell phone (2.2k). I don't use that one much. I talked to KB0OMQ (2 miles away) on 40m today and had him rate the compressor for quality at 1:1 and 4:1. He said there was no difference in quality - just in strength. That was on the CB mic. That had me scratching my head. Surely, 4:1 compression would sound terrible so close in? I'm used to my FT-857D where at 65 of 100 it sounded good but at 100 it was only good for busting pileups. I would get complaints of my audio if I forgot to turn it down for a ragchew. I'm pretty sure my compressor is working - I get much more power for a given sound with it set to 4:1. Is the K2's compressor just THAT clean? ___ 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] Testing the compressor on K2 #4913
Is the design of the K2's compressor so that even at 4:1, it's not too harsh? I've been using 2:1 for normal ops and 4:1 for difficult contacts. My mic is an old CB "Cobra" hand mic (600 ohm). I also have a headset mic salvaged from a cell phone (2.2k). I don't use that one much. I talked to KB0OMQ (2 miles away) on 40m today and had him rate the compressor for quality at 1:1 and 4:1. He said there was no difference in quality - just in strength. That was on the CB mic. That had me scratching my head. Surely, 4:1 compression would sound terrible so close in? I'm used to my FT-857D where at 65 of 100 it sounded good but at 100 it was only good for busting pileups. I would get complaints of my audio if I forgot to turn it down for a ragchew. I'm pretty sure my compressor is working - I get much more power for a given sound with it set to 4:1. Is the K2's compressor just THAT clean? Ken -- Just my 2¢ worth... 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #-1055, Digital On Six #350, Proud builder & owner of Elecraft K2 #4913 -- Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 267.4.0 - Release Date: 6/1/2005 ___ 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] Testing Elecraft T1 autotuner with 10-ft. whip
One way to get a match with a too-short antenna is to use a less-good ground! Seriously, as an antenna is shortened below 1/4 wavelength the capacitive reactance gets very high and the radiation resistance goes very low - well under 1 ohm. The T1 needs to correct both conditions: add enough inductance to bring the system to resonance (balance out the capacitive reactance of that short radiator) and convert the resulting resistance to 50 ohms. On the lower bands the T1 can run out of inductance and can't bring a short antenna to resonance. Most antenna tuners have limited inductance for extreme matching on the lower bands. That's why they usually are specified for only 80 meters and up, and have limited matching capabilities even on 80. One way to overcome that is to add a loading coil to the antenna. That's why mobile/portable short antennas have them. You can use a toroid core or, my preference, make a small air-wound coil on something like a 35 mm film container and add it in series at the antenna feed point. It's a cut-and-paste sort of thing. When the T1 can produce a match you've got enough inductance. I tried something a little different with my T1. I changed the T1's toroid coils. I doubled all the values since I didn't care about 6-meter coverage. That was easy. I wound a new L7. I found that a T50-2 core would fit if it was tilted just a bit to clear the case when the unit was reassembled. Fully wound it took 38 turns and provides about 7.5 uH; that's about twice the inductance of the original L7. Then it was just a matter of moving all the toroids over one space. The original L7 was put in the place for L6, the original L6 was put in the place for L5 and so on with the little three-turn L1 no longer used. That improved the inductance range available for the lower bands. It still won't load a wet noodle on 160 meters without an external inductor, but it'll load a whole lot more in the way of short antennas on the lower bands than it did with the original coils. The other place the T1, like any tuner, can run out of range is in the ability to convert the remaining resistive part of the impedance the antenna presents to 50 ohms for the transmitter. Few antennas in the real world show an impedance over a few thousand ohms. Compared to 50 ohms, that's a range of maybe 20 or 30:1 (30 times 50 = 1500 ohms). But a short antenna with an impedance of, say. 0.5 ohm requires the tuner have a range of 50/0.5 = 100:1! That gets tough to do. BAD GROUND TO THE RESCUE! The impedance is only that low if the resistance is only the radiation resistance of the short antenna. However, two other things come into play: the resistance of the conductors and the ground resistance. Conductor resistance can be a couple of ohms in any case. If the radiation resistance is 0.5 ohm and the conductor resistance (including any coils) is, say, 2 ohms, then the efficiency of the antenna is only 25%. It can't get any better because the power is shared between making heat in the conductors and making electromagnetic waves in space: 25% to RF and 75% to heat. (That's why we need superconductor for really efficient short antennas.) Even so, in most end-fed antennas there is another major element that adds resistance, and loss, to the antenna. That's the ground resistance. It's in series with the antenna, so it eats up power too. A 'typical' ground can have anything from tens of ohms to several hundred ohms resistance. A well-tuned, full-length insulated 1/4 wave 'counterpoise' is going to show something about 35 ohms, for example. A typical 'drag wire' is going to be a lot higher than 35 ohms unless you're walking through salt water. As you increase that resistance, you make the matching job much easier for the tuner at the cost of less actual RF being radiated. So if your pedestrian mobile setup won't tune on a lower band frequency, try shortening your drag wire - just fold it back on itself a bit - and see if that doesn't help. Of course, your RF output, typically in the range of a few percent at best under these conditions, drops even more. But that's part of the wonder of it all: just how little actual radiated RF it takes to be heard over very surprising distances! Ron AC7AC ___ 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] Testing Elecraft T1 autotuner with 10-ft. whip
FYI Paul, W0RW asked me to test the new Elecraft T1 mini antenna tuner with a 10-ft. whip and 13-ft. drag line. I didn't have that kind of whip so I tested it with a 10-ft length of thick (12-gauge) stranded insulated copper wire taped to one of those black, expandable plastic fish poles in a vertical position. I don't think those poles have detrimental electrical or RF properties (fill me in if I'm wrong). The feed point of this vertical wire was 5 feet off the ground. I didn't use the 6-inch feed line that Paul said he was using -- I just connected directly to the bottom of the 10-ft. wire. The 13-ft. drag line consisted of the same kind of wire, and was simply laid on the grass. I used my FT-817 running 5 watts and the Elecraft T1 tuner. I used a CW signal for testing. The results using an Elecraft 4:1 balun were very good. For every band (looking at both the high and low ends of the broad bands) from 50 MHz down through 7 MHz (excluding 60m where I can't broadcast) the SWR was 1:1. On the high end of the 3 MHz band the SWR was between 1:1 and 1:2. I couldn't obtain a decent SWR on the low end of the 3 MHz band. I couldn't load on 160m. All the above tunes were accomplished "first time." Without using a balun, I again obtained 1:1 SWRs from 50 MHz down through 14 MHz. On 10 MHz I found an SWR between 1:1 and 1:2. I couldn't load on the bands below 10 MHz. Looks like that 10-ft. vertical and the 13-ft. drag line work very well with the T1 and the balun. -- Bil KD6JUI ___ 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] Testing Elecraft T1 auto tuner with 10-ft. whip
Very good on the report and I for one appreciate the work and effort into it. My one question is, "are you able to tell if the RF output was "reduced" to satisfy the low SWR or did the RF output remain same?" There are situations where the tuner matches but the radio outputs at reduced power because the antenna is less than optimum. Ron wb1hga "CW, an esoteric experience" KD6JUI writes: The results using an Elecraft 4:1 balun were very good. For every band (looking at both the high and low ends of the broad bands) from 50 MHz down through 7 MHz (excluding 60m where I can't broadcast) the SWR was 1:1. On the high end of the 3 MHz band the SWR was between 1:1 and 1:2. I couldn't obtain a decent SWR on the low end of the 3 MHz band. I couldn't load on 160m. (snip) Without using a balun, I again obtained 1:1 SWRs from 50 MHz down through 14 MHz. On 10 MHz I found an SWR between 1:1 and 1:2. I couldn't load on the bands below 10 MHz. Looks like that 10-ft. vertical and the 13-ft. drag line work very well with the T1 and the balun. ___ 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] Testing Elecraft T1 autotuner with 10-ft. whip
FYI Paul, W0RW asked me to test the new Elecraft T1 mini antenna tuner with a 10-ft. whip and 13-ft. drag line. I didn't have that kind of whip so I tested it with a 10-ft length of thick (12-gauge) stranded insulated copper wire taped to one of those black, expandable plastic fish poles in a vertical position. I don't think those poles have detrimental electrical or RF properties (fill me in if I'm wrong). The feed point of this vertical wire was 5 feet off the ground. I didn't use the 6-inch feed line that Paul said he was using -- I just connected directly to the bottom of the 10-ft. wire. The 13-ft. drag line consisted of the same kind of wire, and was simply laid on the grass. I used my FT-817 running 5 watts and the Elecraft T1 tuner. I used a CW signal for testing. The results using an Elecraft 4:1 balun were very good. For every band (looking at both the high and low ends of the broad bands) from 50 MHz down through 7 MHz (excluding 60m where I can't broadcast) the SWR was 1:1. On the high end of the 3 MHz band the SWR was between 1:1 and 1:2. I couldn't obtain a decent SWR on the low end of the 3 MHz band. I couldn't load on 160m. All the above tunes were accomplished "first time." Without using a balun, I again obtained 1:1 SWRs from 50 MHz down through 14 MHz. On 10 MHz I found an SWR between 1:1 and 1:2. I couldn't load on the bands below 10 MHz. Looks like that 10-ft. vertical and the 13-ft. drag line work very well with the T1 and the balun. -- Bil KD6JUI ___ 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] Testing
On Fri, 28 Jan 2005, Stephen W. Kercel wrote: Just seeing if I hit the reflector. It hit back Thom www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/ Web Hosting as low as 3.49/month ___ 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] Testing
Hit it? The jolt knocked my K2 out of alignment. Damn! Honey, my K2 is out of alignment, I need to buy another K2 (very, very big wicked grin). Mark Saunders, KJ7BS BSD High Power Rocketry Glendale, AZ http://www.bsdrocketry.com From: "Stephen W. Kercel" <[EMAIL PROTECTED]> Date: 2005/01/28 Fri PM 06:56:46 EST To: elecraft@mailman.qth.net Subject: [Elecraft] Testing Just seeing if I hit the reflector. ___ 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
[Elecraft] Testing
Just seeing if I hit the reflector. ___ 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] Testing BL1 mini module
Hi Chuck, I designed the BL1 for Elecraft and I am curious as to where you got the testing procedure that you describe. I don't find it on the posted manual and it is certainly not what I wrote. That said, the behavior that you observe is exactly what I would expect the BL1 to do. Shorting one side to the ground side of the coax will have little effect on SWR except at the lowest frequencies where you are removing part of the transformer inductance. In normal operation, i.e. no short, the two halves of the transformer are connected in series which improves the low frequency response. Testing the BL1 with a 200 ohm resistor across the output terminals and looking at the SWR at the coax connector is entirely adequate. No shorts, opens etc. are needed. 73, Bob, N6CM - Original Message - From: "Chuck Gehring" <[EMAIL PROTECTED]> To: Sent: Friday, November 26, 2004 10:38 AM Subject: [Elecraft] Testing BL1 mini module I finished assembling a BL1 BALUN Module and decided to test it with my 259 Antenna Analyzer. The testing procedure calls for you to connect a pair of 100 ohm resistors in series between the two 200 ohm terminals, then test the SWR with a jumper connected to the input shield and to three different locations on the resistors. The instructions state that the SWR should be low when the jumper is connected between the input shield and the junction between the two resistors. Then it should show poor SWR when the jumper is connected between the input shield and either one of the BALUN output terminals. My tests showed no difference between any of the three connections. I have double and triple checked my soldering connections on the BL1. It is not a complicated module to assemble. Has anyone else tested the BL1 with a 259? Is the BALUN safe to use or should I just stay away from testing equipment without adult supervision? 73, KI4DGH Chuck Gehring ___ 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] Testing BL1 mini module
Chuck, I don't have one, but I have the manual and have studied it and the balun. I would test it by placing the 200 ohms across the antenna connections, and connect the 259 to the 50 ohm connection. It is a voltage balun, but should have a decent SWR from 3.5 to 29 MHZ when so connected. If it still doesn't read 1.2:1 or less, check your connections of all the wires. Chas, W1CG At 01:38 PM 11/26/2004, Chuck Gehring wrote: I finished assembling a BL1 BALUN Module and decided to test it with my 259 Antenna Analyzer. The testing procedure calls for you to connect a pair of 100 ohm resistors in series between the two 200 ohm terminals, then test the SWR with a jumper connected to the input shield and to three different locations on the resistors. The instructions state that the SWR should be low when the jumper is connected between the input shield and the junction between the two resistors. Then it should show poor SWR when the jumper is connected between the input shield and either one of the BALUN output terminals. My tests showed no difference between any of the three connections. I have double and triple checked my soldering connections on the BL1. It is not a complicated module to assemble. Has anyone else tested the BL1 with a 259? Is the BALUN safe to use or should I just stay away from testing equipment without adult supervision? 73, KI4DGH Chuck Gehring ___ 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
[Elecraft] Testing BL1 mini module
I finished assembling a BL1 BALUN Module and decided to test it with my 259 Antenna Analyzer. The testing procedure calls for you to connect a pair of 100 ohm resistors in series between the two 200 ohm terminals, then test the SWR with a jumper connected to the input shield and to three different locations on the resistors. The instructions state that the SWR should be low when the jumper is connected between the input shield and the junction between the two resistors. Then it should show poor SWR when the jumper is connected between the input shield and either one of the BALUN output terminals. My tests showed no difference between any of the three connections. I have double and triple checked my soldering connections on the BL1. It is not a complicated module to assemble. Has anyone else tested the BL1 with a 259? Is the BALUN safe to use or should I just stay away from testing equipment without adult supervision? 73, KI4DGH Chuck Gehring ___ 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
