Re: [Elecraft] Upgrading K3
Wouldn't the new subrx also have to have the extra preamp to match the one in the KXV3B? 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO http://www.qsl.net/k2vco/ On 24 Jun 2017 02:54, Don Wilhelm wrote: I believe it has to do with reducing low frequency noise on the 8 volt line. The addition of the capacitor was mentioned by Eric at the FDIM when the K3S was introduced. The new synthesizers made that lower frequency operation possible, and I assume that during testing, the noise was noticed. 73, Don W3FPR On 6/23/2017 7:38 PM, Fred Jensen wrote: OK Don, I'll bite: What does a "220uF Solid Polymer Electrolytic Capacitor on the output of the 8 volt regulator" have to do with an "extension of the K3 tuning range to 100 KHz?" Voltage regulators are usually found at the far end of the circuit from frequency determining components. Enquiring minds would like to know. [:-) __ 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] ATU and Bandpass Filter
If one chooses to use band pass filters then one should anticipate using an external antenna tuner as well. This of course depends largely on the antenna and the impedance of the antenna at a given frequency.If one is using resonant antennas with a reasonably close 50 ohm impedance then all is well. If one is using a multiband antenna the impedance is likely to vary widely and be far from 50 ohms. As to a beam, if it is correctly adjusted, it should provide a reasonably close impedance to 50 ohms on all band for which it is designed. I find many hams are grossly over concerned with SWR values. For example; 100 ft of RG-8X operating with a 2:1 SWR at 14 MHz will have a total loss of 1.5 dB. Where as the same length of coax with a 1:1 SWR will have a loss of 1.2 dB. A difference of only 0.3 dB. With the same configuration at 28 MHz, the loss with a 2:1 SWR will be 2.1 dB and with a 1:1 SWR the loss will be 1.8 dB a difference of 0.3 dB. My point is..hams are grossly over concerned about having a 1:1 match. Factually, it isn't that dang important. As you can see, there is little difference in total loss. Thus of 100 watts power fed into the line at 14 MHz and a 2:1 SWR the power at the antenna will be 70 watts. Where as 100 watts fed into the line at 14 MHz with a 1:1 SWR the power at the antenna is 75.8 watts. These are real numbers, thus a difference of only ~5 watts. The only thing affecting loss is the loss in the transmission line which is present to some degree regardless of the SWR match. 73 Bob, K4TAX __ 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] ATU and Bandpass Filter
Hi Don, The technique you use with monoband horizontal dipoles and bandpass filters is exactly what we do at the W3AO Field Day site, except we use monoband Yagis rather than dipoles on 40, 20, 15 and 10 meters. (we also use dipoles on 40M). The recent recommendation in the Elecraft Newsletter about using two perpendicular horizontal dipoles isn't very effective, and the concept was incompletely presented. In order to achieve excellent isolation between two perpendicular dipoles, two conditions must be met: - the second dipole needs to be almost exactly perpendicular to the first dipole, even a five degree error significantly reduces the isolation. - most importantly, the second dipole must be perpendicular to the center of the first dipole. An offset of just a few feet left or right of center significantly reduces the isolation. The advantage of this technique is that two horizontal dipoles can be installed in a physically small space with very high isolation, but the big disadvantages are that the perpendicular dipoles must be precisely positioned a nd inevitably at least one of the dipoles is likely to be oriented to an non-optimum azimuth, We're fortunate at W3AO to have a 1000 x 200 foot open grass field for our Field Days, The technique we use with excellent results is to place our antennas for the same band end-to-end with 300 feet of separation between adjacent antennas. While the isolation is significantly less than two precisely positioned perpendicular horizontal dipoles, it has the big advantage of having both antennas oriented to the same azimuth. With four 20 meter Yagis sited end-to-end with 300 foot separation between adjacent antennas we routinely operate four transmitters (CW SSB RTTY and GOTA) on 20 meters with no trace on interference. 73 Frank W3LPL - Original Message - From: "Don Wilhelm" To: elecraft@mailman.qth.net Sent: Saturday, June 24, 2017 12:03:29 AM Subject: Re: [Elecraft] ATU and Bandpass Filter What Matt said is true. However, if your antennas are close to resonance, go ahead and use the ATU to "touch up" the tuning. If you are trying to use a multiband antenna such as a G5RV and such, you might as well forget the advantage of the bandpass filter. Our local club discovered that multiband antennas were a major problem at multi-transmitter Field Day sites. We now use single band dipoles, and yes we use a bandpass filter for each of the FD bands. 73, Don W3FPR On 6/23/2017 4:35 AM, Matt Maguire wrote: > The problem is that the filter is designed to work with a 50 ohm > characteristic impedance (ie. with a 1:1 VSWR). This means you need to put > ATU *after* the filter, not before, otherwise the filter will not work > properly. __ 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 donov...@starpower.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] ATU and Bandpass Filter
Lane,
Yes, you cannot do that.
We are only discussing the need for the filter to have a 50 ohm
non-reactive load.
So if you are using a bandpass filter designed for a 50 ohm load (most
are), then you need to use resonant antennas.
What I was saying is that slight variations from a 50 ohm load may be OK
("fine tuning" the load), but many so called multiband antennas do not
meet that criteria.
Try measuring the feedpoint impedance of a G5RV antenna on various
bands, and you will see that it varies considerably.
73,
Don W3FPR
On 6/23/2017 9:37 PM, Lane wrote:
I think I'm missing something here. I'm not sure I understand putting
the ATU after the filter since the ATU is internal. How does one put
it after the external BP filter?
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Re: [Elecraft] ATU and Bandpass Filter
I think I'm missing something here. I'm not sure I understand putting the ATU after the filter since the ATU is internal. How does one put it after the external BP filter? On Fri, Jun 23, 2017 at 7:03 PM, Don Wilhelm wrote: > What Matt said is true. However, if your antennas are close to resonance, > go ahead and use the ATU to "touch up" the tuning. > > If you are trying to use a multiband antenna such as a G5RV and such, you > might as well forget the advantage of the bandpass filter. > > Our local club discovered that multiband antennas were a major problem at > multi-transmitter Field Day sites. We now use single band dipoles, and yes > we use a bandpass filter for each of the FD bands. > > 73, > Don W3FPR > > On 6/23/2017 4:35 AM, Matt Maguire wrote: >> >> The problem is that the filter is designed to work with a 50 ohm >> characteristic impedance (ie. with a 1:1 VSWR). This means you need to put >> ATU *after* the filter, not before, otherwise the filter will not work >> properly. > > __ > 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 software.research.developm...@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] ATU and Bandpass Filter
What Matt said is true. However, if your antennas are close to resonance, go ahead and use the ATU to "touch up" the tuning. If you are trying to use a multiband antenna such as a G5RV and such, you might as well forget the advantage of the bandpass filter. Our local club discovered that multiband antennas were a major problem at multi-transmitter Field Day sites. We now use single band dipoles, and yes we use a bandpass filter for each of the FD bands. 73, Don W3FPR On 6/23/2017 4:35 AM, Matt Maguire wrote: The problem is that the filter is designed to work with a 50 ohm characteristic impedance (ie. with a 1:1 VSWR). This means you need to put ATU *after* the filter, not before, otherwise the filter will not work properly. __ 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] K3 memory editor
I just started using the K3 memory editor (v1.5.7.20 dated 2015) for the first time and I find it behaves in a strange way, depending whether a memory has content or not. At present I have general memories 0 thru 23 loaded with data and memories 85 thru 99 also loaded. All other memories are ‘empty’. If I try to read all memories from the K3, the editor program reaches memory 24 (empty) and stalls. If I click the Cancel button, it reports ‘cancelling’ but does nothing. I can abort the action by clicking the red close icon. When I check the ‘spreadsheet’ I find that memories 0 thru 23 are filled and displayed, but not memories 85 thru 99. The only way to read memories 85 thru 99 is to ‘select’ them first, then read selected. Attempting to read any empty memory individually results in the function stalling. I also tried clearing a single memory entry and uploading it to the K3, which seems to work OK, but attempting to read it back, results in a stall. Is this normal behavior – a bug, or do I have an old or corrupted memory editor. 73, Alan. G4GNX __ 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] Upgrading K3
I believe it has to do with reducing low frequency noise on the 8 volt line. The addition of the capacitor was mentioned by Eric at the FDIM when the K3S was introduced. The new synthesizers made that lower frequency operation possible, and I assume that during testing, the noise was noticed. 73, Don W3FPR On 6/23/2017 7:38 PM, Fred Jensen wrote: OK Don, I'll bite: What does a "220uF Solid Polymer Electrolytic Capacitor on the output of the 8 volt regulator" have to do with an "extension of the K3 tuning range to 100 KHz?" Voltage regulators are usually found at the far end of the circuit from frequency determining components. Enquiring minds would like to know. [:-) __ 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] For Sale - KX2 Carry Case CS-60
SOLD -- View this message in context: http://elecraft.365791.n2.nabble.com/For-Sale-KX2-Carry-Case-CS-60-tp7632030p7632040.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Upgrading K3
OK Don, I'll bite: What does a "220uF Solid Polymer Electrolytic
Capacitor on the output of the 8 volt regulator" have to do with an
"extension of the K3 tuning range to 100 KHz?" Voltage regulators are
usually found at the far end of the circuit from frequency determining
components. Enquiring minds would like to know. [:-)
73,
Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn
On 6/23/2017 3:21 PM, Don Wilhelm wrote:
Mike,
The KRX3A includes the 220uF Solid Polymer Electrolytic Capacitor on
the output of the 8 volt regulator.
As far as I know, there is no other difference. This capacitor allows
extension of the K3 tuning range (with the modified KBPF3 option) to
100kHz. See
http://www.elecraft.com/manual/E740264%20KBPF3%20Modification%20Kit%20Instructions%20Rev%20A2.pdf
If you have a KRX3 and KBPF3 to modify.
73,
Don W3FPR
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Re: [Elecraft] Upgrading K3
Mike, The KRX3A includes the 220uF Solid Polymer Electrolytic Capacitor on the output of the 8 volt regulator. As far as I know, there is no other difference. This capacitor allows extension of the K3 tuning range (with the modified KBPF3 option) to 100kHz. See http://www.elecraft.com/manual/E740264%20KBPF3%20Modification%20Kit%20Instructions%20Rev%20A2.pdf If you have a KRX3 and KBPF3 to modify. 73, Don W3FPR On 6/23/2017 5:44 PM, Mike Harris wrote: An interesting question is just what is the difference between the KRX3 and the KRX3A. __ 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] Upgrading K3
An interesting question is just what is the difference between the KRX3 and the KRX3A. Regards, Mike VP8NO On 23/06/2017 17:57, Gmail - George wrote: The above assumes the new sub-receiver will operate with the old style synthesizer! __ 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] Upgrading K3
Christopher, Many of us who have upgraded have extra old style synthesizers with no plans for them. If the cost of upgrading your main synthesizer is stopping you from getting a sub-receiver, I and many others would be glad to loan or give you an old style one. In the long run a sub-receive with new style synthesizers is the way to go; but maybe the budget would rather go in 2 steps rather than all at once. The above assumes the new sub-receiver will operate with the old style synthesizer! 73 George AI4VZ -Original Message- From: Christopher Soames ... if this is the case do I then have too upgrade the existing with the new K3S synthesiser card also? __ 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] Upgrading K3
Chris - The new sub receiver comes with the new synthesizer, so you will only need to replace the one in your main receiver, if you have not already done that. The synthesizers must both be the same. 73 de Dave - K9FN On Fri, Jun 23, 2017 at 4:08 PM, Matthew George wrote: > I assume you mean sub receiver? If so, yes you will need two of the new > synthesizers. It's all in the FAQ from 2015 located here on the elecraft > website: http://www.elecraft.com/manual/KSYN3A%20FAQ-ver-C-2.pdf > > Well worth the upgrade by the way! > > Mg NG7M > > -- > Matthew George > 801-560-8754 > > > On Jun 23, 2017, at 1:59 PM, Christopher Soames > wrote: > > > > Hi I am looking to upgrade my K3 with a sun receiver, to do this am I > correct in assuming that the new part will come as per K3S spec? if this is > the case do I then have too upgrade the existing with the new K3S > synthesiser card also? > > > > What else do I then need? > > regards > > G0TZZ > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to m.matthew.geo...@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 dpbu...@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] 6 meters open this morning; listening 50.095 (CW)
Leroy and all, Guess this opinion is from those who only work HF with a random wire dropped over the tree in the backyard. Sure many tuners can load it and you can make some contacts, but it would not compare well with a "real yagi" designed for the frequency (which usually means its resonant). Typical 3-element beam has 6-7 dB gain (not including ground gain effects) and my 6-element 6m yagi has 13 dBi free-space gain. Gain provides more than more signal strength is also rejects noise from off-point directions. Most HF wires loaded by atu on 6m produce mult-lobe patterns and have terrible efficiency. You can even use a dummy load but it does not make a very good antenna. A simple resonant half-wave dipole is way better antenna and how hard is it to make? Should not take more than 20 minutes to have one up for FD. I have quite a bit experience working ground-wave over 70-100 miles on 6m and it s**ks. Of course most of the stations I am trying with have either verticals (for 52.50 FM) or loading their HF antenna. Yet this same 6-element yagi has worked ZS4TX via 6m eme! Better believe ZS4TX was not loading his 80m dipole for that! My neighbor 15 miles from me tries to use his G5RV on 6m with 100w but I can hardly hear him. I'm using either my KX3 or K3 + PR6-10 ... with a real 6m antenna. BTW 2m works way better for ground wave and tropo than 6m; 222 is often better than 2m. VHF propagation is a different "animal" than working on HF (10m is closer to 6m in behavior). BTW, Paul - K7CW is a dedicated 6m operator and runs with four stacked 6m yagis (long time friend). 73, Ed - KL7UW From: "lmarion" To: , "Bob McGraw K4TAX" Subject: Re: [Elecraft] 6 meters open this morning; listening 50.095 (CW) Yes the tuners are great, and my 160 mtr full wave loop makes a good 6mtr antenna, especially on receive. But something about 6 mtrs on a beam, magic. Hf beams, yeah they do mostly what you expect. But something about the short wave length, maybe. Maybe 2 mtrs is that way too, I don't know. But every 6 meter beam I have kicks butt. My KX3 and a portable MFJ 6 meter 3ele beam works like a big gun station. Leroy AB7CE 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] K3S Noise reduction Test
I too would like the NR to use the A & B knobs and even greater options with the B knob. I think I would find it much easier to select the right settings on the fly. Maybe user selectable in the next or upcoming K3/K3s update? 73, Gary KA1J __ 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] Upgrading K3
I assume you mean sub receiver? If so, yes you will need two of the new synthesizers. It's all in the FAQ from 2015 located here on the elecraft website: http://www.elecraft.com/manual/KSYN3A%20FAQ-ver-C-2.pdf Well worth the upgrade by the way! Mg NG7M -- Matthew George 801-560-8754 > On Jun 23, 2017, at 1:59 PM, Christopher Soames > wrote: > > Hi I am looking to upgrade my K3 with a sun receiver, to do this am I correct > in assuming that the new part will come as per K3S spec? if this is the case > do I then have too upgrade the existing with the new K3S synthesiser card > also? > > What else do I then need? > regards > G0TZZ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to m.matthew.geo...@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] Upgrading K3
Hi I am looking to upgrade my K3 with a sun receiver, to do this am I correct in assuming that the new part will come as per K3S spec? if this is the case do I then have too upgrade the existing with the new K3S synthesiser card also? What else do I then need? regards G0TZZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] For Sale - KX2 Carry Case CS-60
I have a CS-60 which is the large carry case for the KX2. It's never been used other than to test the fit. $30 shipped Conus. Paypal preferred 73 Tex ka5y -- View this message in context: http://elecraft.365791.n2.nabble.com/For-Sale-KX2-Carry-Case-CS-60-tp7632030.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Article on Web pertaining to Telecommunications.
So much for "Nothing new under the sun". ;) This news could be huge for the future. Fundamental research scores yet again. Carl Sagan once said that your cannot tell beforehand where advances in research will take you. (As in solid state electronics, lasers, etc). 73 de Ray K2ULR KX3 #211 -Original Message- From: Richard Fjeld To: elecraft posting Sent: Fri, Jun 23, 2017 1:49 pm Subject: [Elecraft] OT: Article on Web pertaining to Telecommunications. Maybe you saw this. They say the applications are near infinite. Phys.org: A 100-year-old physics problem has been solved. http://google.com/newsstand/s/CBIwq7GPnjU 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 Message delivered to raysil...@verizon.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] K3 6M power out
Is it normal for the 6M output to be about 10 watts less than indicated (i.e. 90w for 100w setting). If I do the 50w wattmeter cal on 20 M all bands but 6 are pretty much right on. Conversely if I cal on 6 then all the lower bands are (not surprisingly) 10 watts high. Mark. N2QT __ 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] Elecraft KX2 Spinner Knob
You may want to look into this more. Shaft design may not be able to support such a knob cause of what bearings type it is. May cause damage that you may not want on your KX2. Jim K9TF __ 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] OT: Article on Web pertaining to Telecommunications.
Maybe you saw this. They say the applications are near infinite. Phys.org: A 100-year-old physics problem has been solved. http://google.com/newsstand/s/CBIwq7GPnjU 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 Message delivered to arch...@mail-archive.com
[Elecraft] KX2 and Omnirig ...
Has anybody had any experience with coming up with an omnirig ini file for the KX2 ? Failing that, any pointers to how to come up with a new file ? I've read the Afreet readme files, but am still no wiser as to how to go about this. Thanks !! John N6RCD __ 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] K3S USB audio output needs to be adjustable in Menu
There is a Lin Out setting in menu. Sent from my iPhone ...nr4c. bill > On Jun 22, 2017, at 1:31 PM, Dick via Elecraft > wrote: > > Hello Elecraft, > > When feeding the audio from the K3S USB port to the CPU, the K3S audio > level is extremely high and way too hot for good performance on many digital > modes. > > Example, even with my CPU's sound card set at the lowest possible level of > "01" my K3S is hitting the JT-65 software with a super strong signal that > is much higher than the software wants to see and performance is degraded. > The same is true when operating RTTY using MMTTY or 2Tone software. > > The USB audio output on the K3S needs to be adjustable in the K3S Menu as > it was on the K3 Serial port. > > I wrote to you a few months ago about this without a positive reply. > Please address this serious issue. > > Thank you- > > Richard Van Zandt- K9OM > > > > In a message dated 6/2/2017 7:28:48 P.M. Central Daylight Time, > elecraft-requ...@mailman.qth.net writes: > > If you are using Line Out with a fixed gain setting to feed audio to > WSJT-X, adjusting the AF control will not do anything. What I do is leave > my RF gain control at its normal position (around 3 o'clock) and use the > slider at the lower left in the WSJT-X window to compensate for gain > variations. > > 73, > Rich VE3KI > > W3FPR wrote: > >> Bret, >> >> You may have better luck with running the RF Gain full and adjusting >> with the AF gain. That way the RX AGC will smooth out variations in the >> signal level. >> >> 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 n...@widomaker.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/100 - Add a KPA500/KAT500?
I figure when that KPA1500 comes out there will be a few KPA500/KAT500 units up for sale ;-) I'm thinking to add a used set to my K3S/100 and would like advice on adapting my system. At present, my remote ATUs are only rated to 100W (LDG RC/RT100 at base of G5RV) and 200W (MFJ-927), so I'll need to bump those up. In fact, I might recall the WA2NAN True-Talk 102ft G5RV was rated to 100W maximum, but I'm not sure and can't find information on the internet. Might be used of a 500W rated remote ATU at base will allow 500W or could the antenna construction of that G5RV be limiting? My other antenna is a DX Engineering 43ft vertical which looks to be rated to 1500W with a different remote base ATU. All of my Common Mode Chokes are rated to 500W or more. My current connectors are PL-259/SO239. I might need to replace a few lightning arresters rated 400W PEP? Appreciate advise and comments - especially if the bump from 100W to 500W will be worth the trouble! BRET/N4SRN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-100-Add-a-KPA500-KAT500-tp7632023.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 6 meters open this morning; listening 50.095 (CW)
I think a lot of that comes from the fact that the average active 6M station runs a modest beam & 100 W. So, any less than that average is at a disadvantage. Obviously some run yuge beams and legal limit. Those station get through 1st, followed by the average stations and finally the rest. 6M offers every propagation mode known at one time or another. However, some openings only last a matter of minutes. This is especially true for multiple hop sporadic E, not so much as when the MUF makes it to 50 MHz for true F2 openings. F2 seems to last a tad longer. Sporadic E can also be very localized where stations 50 miles apart are not in the "skip-zone". During very active times, a few of us in the DC area keep in touch on 2M FM. We have all found for example, many times a station in Baltimore MD will hear the DX fine but someone in say, in no. Virginia hears nothing. Give it twenty minutes and the situation reverses. I have been active on 50MHz for over 50 years. Taking advantage of the 6M propagation requires much more listening than transmitting because, relating to the comment above, calling a station in the noise is probably just clobbering the guys who CAN hear it. Listen 1st. Analyze who's working what and where before just blasting away. The beacons around 50.05 to 50.08 will tell you where the propagation is favoring. These beacons are all over the world, so use them to your advantage. 73, Charlie k3ICH -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of lmarion Sent: Thursday, June 22, 2017 10:55 PM To: elecraft@mailman.qth.net; Bob McGraw K4TAX Subject: Re: [Elecraft] 6 meters open this morning; listening 50.095 (CW) Yes the tuners are great, and my 160 mtr full wave loop makes a good 6mtr antenna, especially on receive. But something about 6 mtrs on a beam, magic. Hf beams, yeah they do mostly what you expect. But something about the short wave length, maybe. Maybe 2 mtrs is that way too, I don't know. But every 6 meter beam I have kicks butt. My KX3 and a portable MFJ 6 meter 3ele beam works like a big gun station. Leroy AB7CE __ 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] ATU and Bandpass Filter
The problem is that the filter is designed to work with a 50 ohm characteristic impedance (ie. with a 1:1 VSWR). This means you need to put ATU *after* the filter, not before, otherwise the filter will not work properly. 73 de Matt VK2RQ > On 23 Jun 2017, at 1:13 pm, Lane > wrote: > > A question about the K2. Taking it to the club for FD and I have a > bandpass filter (CF-20) which says "Never use radio's internal tuner > with filter." > > I have the internal ATU installed. Is there a way to bypass that? Or > should I just use the "main antenna" jack (manual says never use if > ATU installed) on the bottom left, instead of the two midway in the > middle? > __ > 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 matt.vk...@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
