Re: [Elecraft] Magnetic Loops
I think I saw the article for that one myself, or at least a similar one by somebody else. I guess very low profile would be the major advantage of one for mobiling, but almost anything else would be a better choice for any other application. I actually built a DDRR about 40 years ago (for 20m, I think) comprised of wire laid out on the floor of my apartment in Cedar Rapids, Iowa. That was back when it was still touted as a Directional Discontinuity Ring Radiator ... an erroneous description akin to the silliness of the more recent EH antenna claims. I pumped 100 watts into my DDRR and made several contacts, but the RF burns it put out if I got too close to it were very painful. 73, Dave AB7E --Original Mail-- From: David Cutter d.cut...@ntlworld.com To: Dave - AB7E xda...@cis-broadband.com, daleput...@hotmail.com, g...@isect.com, elecraft@mailman.qth.net Sent: Tue, 4 Aug 2009 06:51:19 +0100 Subject: Re: [Elecraft] Magnetic Loops G3LDR made one as a roof rack many years ago; designed for 20m as I recall. David G3UNA That's not really true. The DDRR is NOT a loop antenna. The DDRR is a very short vertical with top loading contributed by a shorted transmission line (formed by the horizontal loop and the ground plane). Check the field polarization 73, Dave AB7E Hi Gary, Seems to me that you are right on with all but the very last part... and that may need some investigation, with relation to the DDRR antenna.. that is a loop, and horizontal, over a very good ground. Just a thought --... ...-- Dale - WC7S in Wy __ 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] Magnetic Loops
Gary Hinson wrote: By the way, I don't know if it's the same with magnetic loops but the fullwave loops radiate mostly broadside to the plane of the loop. If the loop is vertically oriented (e.g hanging between two trees), the polarization of the signal is determined by whether the loop is fed at a horizontal or vertical section of wire. If the entire loop is laid 'flat on its back', most of the radiation heats the ground, some heats the clouds but I'm uncertain what polarization the signal would be - probably horizontal I guess since all the wire is parallel to the ground but I may be wrong. With magnetic loops most of the radiation is in the plane of the loop, and it's vertical polarization if the loop is vertical. But there is not much directivity. There are nulls axially through the centre of the loop but they are extremely sharp. The polarization also changes to the horizontal as you move round to the side too. According to MFJ if you can get it up high enough you can mount their magnetic loops horizontal and get omnidirectional horizontal polarization with nulls straight up and down. It's interesting switching between the magnetic loop and a dipole, sometimes the dipole has the stronger signal and sometimes the loop. A receive magnetic loop would make an inexpensive and easy to make antenna for diversity reception for those who have the 2nd RX in their K3. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/Re%3A-Magnetic-Loops---Stan-tp3378914p3383267.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
[Elecraft] Rif: Re: problem : k2 rx frequency shift
__ 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] Noise with KUSB
I recently discovered the source of a very annoying noise in my K3. When unplugging the USB cable from my USB hub the noise in the receiver disappears. How do I get rid of this? I am using HRD, so a connection to my PC is really needed... 73's Svend, OZ7UV TDC Bredbånd for 0 kr. - Spar 695 kr. Se http://tdc.dk/freemailtilbud/ Denne mail er sendt via Mail på TDC Online - Læs mere om TDC's mailtjeneste på http://mail.tdconline.dk/ __ 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] USB to Serial Plus 1500 watts
Ok guys Everything is groundedbut when you are pushing legal limit power in a contest, I have blown up my USB to Serial Converter. It just doesn't work after the RF does its magic to it. That is why I went to a serial connection. So, what have people experienced with their USB Converters when running the big amp? Lee - K0WA The New Kansas QSO Party - August 29, Sat 9am-9pm and August 30 Sun 9am-3pm CDT More Info at: http://www.ksqsoparty.org/ In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? __ 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] K3 line-input question
Hello Elecrafters, Quick question - what could have changed in this scenario? Using K3 in DATA-A mode; audio from DM780 going into K3 via rear audio input connector. The K3's input was set to LINE IN in the main menu. Volume from the PC was set to 50%, and as such a PSK-31 signal was registering about 6 bars ALC with line input gain set to 14. After a while of operating without issue, the waterfall turned into a solid signal; as if the line audio output of the K3 had locked up. I had to switch modes on the K3 to get the waterfall back to normal. After that, without any change to the PC output volume or K3 mic gain, transmissions now registered about 3 bars on the ALC meter. I had to turn the mic gain up to about 20-21 to reach the same level of input as before. I checked the all volume input and output settings, and they're the same as before. I also went through and checked the relevant FW settings and nothing had been modified. I'm using FW 3.24(D), which I believe was only issued to a very few number of testers so I can't go into FW details. I've CC'd Lyle in case this may be FW issue. However, I'd just like to find out from the group if anything similar has occurred to others or been reported. All suggestions welcome. -- 73 de James K2QI __ 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] Noise with KUSB
Svend, have you tried isolating the K3 and USB hub by using chokes on all of the K3's inputs and outputs and the USB hub's outputs plus power adaptor input? 73 de James K2QI On Tue, Aug 4, 2009 at 6:38 AM, Svend Spanget span...@privat.dk wrote: I recently discovered the source of a very annoying noise in my K3. When unplugging the USB cable from my USB hub the noise in the receiver disappears. How do I get rid of this? I am using HRD, so a connection to my PC is really needed... 73's Svend, OZ7UV TDC Bredbånd for 0 kr. - Spar 695 kr. Se http://tdc.dk/freemailtilbud/ Denne mail er sendt via Mail på TDC Online - Læs mere om TDC's mailtjeneste på http://mail.tdconline.dk/ __ 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 -- 73 de James K2QI __ 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] USB to Serial Plus 1500 watts
Some random thoughts: Unless the contest legal limit is different from the regular legal limit (always a possibility I guess) I haven't had any problems. How did you determine that the USB-serial converter was damaged by RF and not something else? If you have enough RF in the shack to be blowing up things, you have other problems that need solving. Wes --- On Tue, 8/4/09, Lee Buller k...@swbell.net wrote: Ok guys Everything is groundedbut when you are pushing legal limit power in a contest, I have blown up my USB to Serial Converter. It just doesn't work after the RF does its magic to it. That is why I went to a serial connection. So, what have people experienced with their USB Converters when running the big amp? Lee - K0WA __ 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] USB to Serial Plus 1500 watts
Lee, Everything may be grounded, but that is a safety ground, and it certainly cannot be relied on for an RF ground. It sounds like things in your shack are hot with RF. The place to correct that is at the antennas - the feedline should not be carrying common mode RF into the shack - i.e. all the RF flowing on the feedlines should be balanced and no radiation should occur. That should be true for both coax and balanced line. To repeat, if you have RF in the shack problems, get the RF balanced at the antenna feedpoint, and if the feedline is coax, use an effective balun to keep the common mode current off the outside of the coax. 73, Don W3FPR Lee Buller wrote: Ok guys Everything is groundedbut when you are pushing legal limit power in a contest, I have blown up my USB to Serial Converter. It just doesn't work after the RF does its magic to it. That is why I went to a serial connection. So, what have people experienced with their USB Converters when running the big amp? Lee - K0WA __ 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] Magnetic Loops
Clearly there's a lot of interest in small transmitting loop antennas, so here are some links I've collected over the past several years that are still good detailing the efforts of several Hams (I checked them to make sure they still work ;-): Harry, SM0VPO, has several interesting designs including one built on a packing crate about which he wrote: I have been placed in a situation where a landlord denied permission to erect an antenna. Any form of antenna was unreasonable, even a white-painted broom handle caused interference!! My dartboard frame did not cause any interference at all... and so he evolved his novel and stealthy small loop transmitting antenna. He also describes an 80 meter frame antenna. At the site below, click on Projects, then Antennas and then look at links under Antennas on the left side of the page for 80 meter frame ant and Packing crate ant. http://web.telia.com/~u85920178/ -- David, PA3HBB/G0BZF has this nice page detailing his work with loops at: http://www.qsl.net/pa3hbb/magloop2.htm At the time he wrote the page he traveled a great deal and writes, In order to fill my evenings with something other than foreign television (or drinking in the bar), I prefer to sit in my room and work the DX on the radio. Though this situation may not be typical of all of radio amateurs, the need for a small, effective and portable antenna will surely hit home with a number of them. --- As a sign of the interest small transmitting loops generate, one fellow in Belgium created a very nice page detailing his loops and the work of others that ended up swamping him with e-mails, so it was relocated under a new URL: http://www.qsl.net/mnqrp/Loop/Mag_Loops.htm It details making loops as well as ideas for making your own low-loss capacitors to tune them with. --- DJ3TZ built a small loop using copper tubing shown here: http://www.qsl.net/dj3tz/loop2.html It has a nice fairly self-explanatory photo but most of the links on that page to other pages are now out of date. -- There are probably hundreds of other links on the net to interesting information on STLs, but these are just a few that I've collected over the years. Some of them are over 10 years old now, and clearly still popular. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Magnetic Loops
Hi All, A friend of mine here locally once did quite a bit of modeling for loops. He determined that setting up a loop vertically was easier than he expected. Horizontal loops are difficult here in the desert. Anyway, his modeling disclosed that the horizontal height of a vertical loop (full wave) only needed to be about 30 degrees to start being quite effective. In other words, a 40 meter vertical loop only needed to be about 11 or 12 feet high on each end, with the rest of the loop run horizontally. This is not all that difficult to do with readily available supports. Of course, the bottom of the loop should be off the ground as much as possible, so the total vertical height should be something more than just 11 or 12 feet. Vertical loops are quite directional, but they have a lower take-off angle for DXing. Smaller magnetic loops may have similar tendencies. I know it is important to get them up off the ground as much as possible, and I have always had much better results using them vertically as opposed to horizontally. I built a couple of these things from magazine articles, and they do work. It's hard though, to imagine the efficiency being all that great. Nevertheless, they are fun to play with, and not too difficult to make yourself. Bill Jones, KD7S, had a very good article in QST some years back which really gives you a lot of important info about doing various things to make the antenna as efficient as possible. His trombone capacitor was very interesting, but I haven't tried that yet. I would think that apartment dwellers, hopefully having a balcony, might have some real fun tinkering with these antennas. If you are high enough off the ground you might get decent results using the loop horizontally. A low RPM motor to tune the capacitor makes life easier too. I bought one from Edmund Scientific, and it worked very well. The tuning will be extremely sharp however. I was never able to go more than a few khz without having to retune. Dave W7AQK - Original Message - From: Julian, G4ILO julian.g4...@gmail.com To: elecraft@mailman.qth.net Sent: Tuesday, August 04, 2009 1:35 AM Subject: Re: [Elecraft] Magnetic Loops Gary Hinson wrote: By the way, I don't know if it's the same with magnetic loops but the fullwave loops radiate mostly broadside to the plane of the loop. If the loop is vertically oriented (e.g hanging between two trees), the polarization of the signal is determined by whether the loop is fed at a horizontal or vertical section of wire. If the entire loop is laid 'flat on its back', most of the radiation heats the ground, some heats the clouds but I'm uncertain what polarization the signal would be - probably horizontal I guess since all the wire is parallel to the ground but I may be wrong. With magnetic loops most of the radiation is in the plane of the loop, and it's vertical polarization if the loop is vertical. But there is not much directivity. There are nulls axially through the centre of the loop but they are extremely sharp. The polarization also changes to the horizontal as you move round to the side too. According to MFJ if you can get it up high enough you can mount their magnetic loops horizontal and get omnidirectional horizontal polarization with nulls straight up and down. It's interesting switching between the magnetic loop and a dipole, sometimes the dipole has the stronger signal and sometimes the loop. A receive magnetic loop would make an inexpensive and easy to make antenna for diversity reception for those who have the 2nd RX in their K3. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/Re%3A-Magnetic-Loops---Stan-tp3378914p3383267.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 __ 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] Noise with KUSB
I recently discovered the source of a very annoying noise in my K3. When unplugging the USB cable from my USB hub the noise in the receiver disappears. I had posted on this topic a couple weeks ago. I didn't discover my own noise problem until I was looking at the noise floor with a SDR-IQ and SpectraVue software. In my case, most of the noise from the USB-to-RS232 adapter is masked by band noise. I managed to wind 10-turns of the USB adapter cable through a 0.75-inch I.D. #31 ferrite core. The choke was placed as close as possible to the DB-9 connector. After winding, I detected no change which is unusual when using these cores. It may be that the noise is induced in differential mode between the USB adapter and the K3. I ended up discarding the adapter and went with a serial cable connected between the K3 and the one and only RS232 serial port on my PC. Problem solved. Paul, W9AC __ 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] Noise with KUSB
You've found the noise source; now find a way to eliminate or replace it. Does your USB hub use a wall-wart power supply? Some of these are noisy. Maybe you have another USB port on your computer to which you can connect the KUSB directly, bypassing the hub? Also, some USB hubs work OK with the PS disconnected, depending on the current demands of attached devices. /Rick N6XI On 8/4/09, Svend Spanget span...@privat.dk wrote: I recently discovered the source of a very annoying noise in my K3. When unplugging the USB cable from my USB hub the noise in the receiver disappears. How do I get rid of this? I am using HRD, so a connection to my PC is really needed... 73's Svend, OZ7UV TDC Bredbånd for 0 kr. - Spar 695 kr. Se http://tdc.dk/freemailtilbud/ Denne mail er sendt via Mail på TDC Online - Læs mere om TDC's mailtjeneste på http://mail.tdconline.dk/ __ 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] Adding 6 meters
Hey gang: I have my KAT100 and KPA100 in a separate EC2 enclosure. I considering adding the XV50 to this package. Has anyone done this and can you tell me if all units can be interfaced at the same time Just curious ! Thanks and 73: JerryN0JRN __ 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] C/O Brian (Web Administrator) K4
On Thu, 30 Jul 2009 09:30:31 -0700 (PDT) Wes Stewart n...@yahoo.com wrote: Simple, now that most of the issues surrounding the K3 have been addressed and FIXED Which ones? None that I've demonstrated to them have been. Wes Dear Wes, If you've noticed on the Reflector as of late the problems have been minimal at best! Knobs cracking/breaking or maybe something not up to snuff as concerns CW keying, or maybe ONE PERSON DOES'NT LIKE A PARTICULAR OS! That in my book is all about personal preference, not the fault of Elecraft in that with the rev. 3.14 the rig does absolutely EVERYTHING we're asking of it and can find NO FAULT @ all! If you're own GRIPES have'nt been addressed by them (Elecraft) then Why not?. Regards, Jim/nn6ee PS, We operate on CW/SSB/ Digital FLAWLESSLY! __ 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] C/O Brian (Web Administrator) K4
Well, to be honest there are still several features advertised that to this date still haven't been implemented. For example: 1. Synchronous AM detection 2. Temperature controlled oscillator calibration Those are just two features missing that I can recall of the top of my head. Plus there are always improvements in the works. The next version of the firmware contains a lot of pleasant surprises. 73 de James On Thu, Jul 30, 2009 at 5:01 PM, JIM DAVIS nn...@astound.net wrote: On Thu, 30 Jul 2009 09:30:31 -0700 (PDT) Wes Stewart n...@yahoo.com wrote: Simple, now that most of the issues surrounding the K3 have been addressed and FIXED Which ones? None that I've demonstrated to them have been. Wes Dear Wes, If you've noticed on the Reflector as of late the problems have been minimal at best! Knobs cracking/breaking or maybe something not up to snuff as concerns CW keying, or maybe ONE PERSON DOES'NT LIKE A PARTICULAR OS! That in my book is all about personal preference, not the fault of Elecraft in that with the rev. 3.14 the rig does absolutely EVERYTHING we're asking of it and can find NO FAULT @ all! If you're own GRIPES have'nt been addressed by them (Elecraft) then Why not?. Regards, Jim/nn6ee PS, We operate on CW/SSB/ Digital FLAWLESSLY! __ 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 -- 73 de James K2QI __ 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] Adding 6 meters
Jerry, No problem at all. Just take a look at the XV series Owner's Manual - on page 11 you will see Figure 7. K2 Extended Control Cabling Hookup Diagram. Connect the KPA100/KAT100 combo package as shown for the KAT100 shown in that figure. 73, Don W3FPR n0jrn wrote: Hey gang: I have my KAT100 and KPA100 in a separate EC2 enclosure. I considering adding the XV50 to this package. Has anyone done this and can you tell me if all units can be interfaced at the same time Just curious ! Thanks and 73: JerryN0JRN __ 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] Magnetic Loops
We also have an excellent article on Magnetic Loops on our elecraft Tech notes page (about half way down the page). http://www.elecraft.com/TechNotes/tech_notes.htm 73, Eric WA6HHQ __ 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] K3 Artifact in AFX mode
During NAQP CW this weekend, I noticed a thump/click sound in my right headphone when using AFX. I tried a different (new) set of phones thinking maybe I had a bad diaphragm in the old set, but same sound. It doesn't occur in normal mono mode. Too, the headphones feed is from the rear panel, not the front panel headphone jack. I'm using firmware 3.23... I hadn't noticed this before, but haven't used AFX for a while either. So not sure if it is coincidental or not... Thanks, Julius - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/K3-Artifact-in-AFX-mode-tp3385751p3385751.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] Adding 6 meters
Thanks Don: On 8/4/2009 11:08:52 AM, Don Wilhelm (w3...@embarqmail.com) wrote: Jerry, No problem at all. Just take a look at the XV series Owner's Manual - on page 11 you will see Figure 7. K2 Extended Control Cabling Hookup Diagram. Connect the KPA100/KAT100 combo package as shown for the KAT100 shown in that figure. 73, Don W3FPR n0jrn wrote: Hey gang: I have my KAT100 and KPA100 in a separate EC2 enclosure. I considering adding the XV50 to this package. Has anyone done this and can you tell me if all units can be interfaced at the same time Just curious ! Thanks and 73: JerryN0JRN __ 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] Audio Level and Heil Pro Set
I sure would like it... I swap headphones now, only use the Proset for SSB, prefer the Sony Walkman's for CW. Less fatigue with those light little things, but no way to hand a boom mic from 'em hihi I use both the front and rear connectors for headphones. The Heil is plugged in the front, the Sony's in the back. 73, Julius n2wn K2MK wrote: Hi Pete: I also felt at times that the PROSET headphone volume was too low for my taste. I solved the problem by plugging them into the rear speaker jack. Set CONFIG: SPKRS to 2 (for stereo). I had exchanged e-mails with both Gary and Lyle at Elecraft to make sure this was ok. In one of the e-mails from last December, Lyle made the following comment: ..we may provide a future option to let you set the relative headphone versus speaker level from a CONFIG menu. Your feedback is very important to us! So be sure to let them know if you think such a config setting might be useful to you. Your posting reminded me that I never got back to Lyle on that subject. The only downside of using the speaker jack for headphones is if you want to use the internal speaker you have to unplug the headphones. The internal speaker is muted when anything is plugged into the external speaker jack. 73, Mike K2MK Peter Chamalian Sun, 02 Aug 2009 14:06:06 -0700 I've been enjoying my K3 but find the audio output in my Heil Pro Set is rather weak. Is there a mismatch here or some setting that will boost the audio level? Just for the record, I hae the latest production release firmware, speaker + phones is no. Thanks, Pete, W1RM __ 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 - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/Audio-Level-and-Heil-Pro-Set-tp3374190p3386561.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
[Elecraft] [K3] K3: Wish List--Ad a General coverage mode for SW Listening
I like to use my K3 for general coverage listening from time to time. It is a great performer for this purpose. My only complaint is that after I tune around for awhile and then go back to my Ham band memories they are all screwed up with out of band settings and AM mode. It would be nice to maybe use a PF button to put it in General coverage mode so it will not effect the Ham band usage. Larry Naumann N0SA -- View this message in context: http://n2.nabble.com/K3%3A-Wish-List--Ad-a-General-coverage-mode-for-SW-Listening-tp3386638p3386638.html Sent from the [K3] 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] K3 line-input question
K2QI wrote: Hello Elecrafters, Quick question - what could have changed in this scenario? Using K3 in DATA-A mode; audio from DM780 going into K3 via rear audio input connector. The K3's input was set to LINE IN in the main menu. Volume from the PC was set to 50%, and as such a PSK-31 signal was registering about 6 bars ALC with line input gain set to 14. After a while of operating without issue, the waterfall turned into a solid signal; as if the line audio output of the K3 had locked up. I had to switch modes on the K3 to get the waterfall back to normal. After that, without any change to the PC output volume or K3 mic gain, transmissions now registered about 3 bars on the ALC meter. I had to turn the mic gain up to about 20-21 to reach the same level of input as before. I checked the all volume input and output settings, and they're the same as before. I also went through and checked the relevant FW settings and nothing had been modified. I'm using FW 3.24(D), which I believe was only issued to a very few number of testers so I can't go into FW details. I've CC'd Lyle in case this may be FW issue. However, I'd just like to find out from the group if anything similar has occurred to others or been reported. All suggestions welcome. I'm not sure what you mean by the waterfall turned into a solid signal. Did it go black, i.e. dead? One thing that springs to mind is an unreliable connection. Try waggling the cables around. I can't think of a software reason for what happened. By the way you don't need 6 bars on the ALC indication. 4 to 5 is sufficient. Not that I imagine it has any bearing on the reported problem. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/K3-line-input-question-tp3384736p3386703.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] K3 line-input question
No, it didn't go black... it went the polar opposite; as if I was looking at a single 3khz wide signal! I had to switch modes, then back to DATA-A for it the waterfall to go back to normal. Weird huh? Also, not so much the level of operating ALC that I'm worrying about, but why the change in how much line-gain is necessary now to achieve the same results. That's what's bugging me. Cheers, James K2QI On Tue, Aug 4, 2009 at 3:26 PM, Julian, G4ILO julian.g4...@gmail.comwrote: I'm not sure what you mean by the waterfall turned into a solid signal. Did it go black, i.e. dead? One thing that springs to mind is an unreliable connection. Try waggling the cables around. I can't think of a software reason for what happened. By the way you don't need 6 bars on the ALC indication. 4 to 5 is sufficient. Not that I imagine it has any bearing on the reported problem. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://n2.nabble.com/K3-line-input-question-tp3384736p3386703.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 -- 73 de James K2QI __ 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] [K3] K3: Wish List--Ad a General coverage mode for SW Listening
I solved this problem by programming the per-band memories (M1 - M4 on the front panel) with frequencies and modes in each band. M1 is CW mode near the low end of the CW sub-band, M2 is CW near the high end of the CW sub-band, M3 for the low end of the phone segment, and M4 for the high end of the phone band. I do this on each ham band. Then, after tuning around the SW bands, I just hit MV, M1 and I'm back in the ham band on CW. Not quite as easy as what you're suggesting, but it works for me. 73 -- Joe KB8AP On Aug 4, 2009, at 12:19 PM, N0SA wrote: I like to use my K3 for general coverage listening from time to time. It is a great performer for this purpose. My only complaint is that after I tune around for awhile and then go back to my Ham band memories they are all screwed up with out of band settings and AM mode. It would be nice to maybe use a PF button to put it in General coverage mode so it will not effect the Ham band usage. Larry Naumann N0SA __ 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] USB to Serial Plus 1500 watts
Guess what Lee, I have blown 3 serial ports. Not sure why you would think high RF will blow a USB to serial converter and not a serial port. FYI I built a cable using CAT 5 cable as suggested on this site and have not had a problem since. Frank - W4NHJ - Original Message - From: Lee Buller k...@swbell.net To: Elecraft Reflector elecraft@mailman.qth.net Sent: Tuesday, August 04, 2009 9:33 AM Subject: [Elecraft] USB to Serial Plus 1500 watts Ok guys Everything is groundedbut when you are pushing legal limit power in a contest, I have blown up my USB to Serial Converter. It just doesn't work after the RF does its magic to it. That is why I went to a serial connection. So, what have people experienced with their USB Converters when running the big amp? Lee - K0WA The New Kansas QSO Party - August 29, Sat 9am-9pm and August 30 Sun 9am-3pm CDT More Info at: http://www.ksqsoparty.org/ In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? __ 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] Magnetic Loops
I went to one of those lectures by Prof Mike Underhill (G3L??) in front of his IEE peers who did not receive his wisdom too readily. It seemed like a one-man campaign. In essence he postulated that a mag loop was more like a short folded dipole and he showed why. The usual calculated losses were insufficient to show why loops worked the way they did. I once made a loop from 12ft x 4ft sheet aluminium with a huge capacitor 4ft x 6inch vanes spot welded to the ends (that was an education in itself). It was incredibly impractical, but I did it anyway. I measured a 46dB front to side attenuation. I scrapped it soon afterward. David G3UNA Ron D'Eau Claire r...@cobi.biz wrote: Clearly there's a lot of interest in small transmitting loop antennas, so here are some links I've collected over the past several years that are still good detailing the efforts of several Hams (I checked them to make sure they still work ;-): Harry, SM0VPO, has several interesting designs including one built on a packing crate about which he wrote: I have been placed in a situation where a landlord denied permission to erect an antenna. Any form of antenna was unreasonable, even a white-painted broom handle caused interference!! My dartboard frame did not cause any interference at all... and so he evolved his novel and stealthy small loop transmitting antenna. He also describes an 80 meter frame antenna. At the site below, click on Projects, then Antennas and then look at links under Antennas on the left side of the page for 80 meter frame ant and Packing crate ant. http://web.telia.com/~u85920178/ -- David, PA3HBB/G0BZF has this nice page detailing his work with loops at: http://www.qsl.net/pa3hbb/magloop2.htm At the time he wrote the page he traveled a great deal and writes, In order to fill my evenings with something other than foreign television (or drinking in the bar), I prefer to sit in my room and work the DX on the radio. Though this situation may not be typical of all of radio amateurs, the need for a small, effective and portable antenna will surely hit home with a number of them. --- As a sign of the interest small transmitting loops generate, one fellow in Belgium created a very nice page detailing his loops and the work of others that ended up swamping him with e-mails, so it was relocated under a new URL: http://www.qsl.net/mnqrp/Loop/Mag_Loops.htm It details making loops as well as ideas for making your own low-loss capacitors to tune them with. --- DJ3TZ built a small loop using copper tubing shown here: http://www.qsl.net/dj3tz/loop2.html It has a nice fairly self-explanatory photo but most of the links on that page to other pages are now out of date. -- 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Noise with KUSB
On Tue, Aug 4, 2009 at 6:38 AM, Svend Spanget span...@privat.dk wrote: I recently discovered the source of a very annoying noise in my K3. When unplugging the USB cable from my USB hub the noise in the receiver disappears. How do I get rid of this? I am using HRD, so a connection to my PC is really needed... 73's Svend, OZ7UV One of the most common sources of USB device related noise is a bad/open shield on the USB cable. First thing to try is a different USB cable. Since you have a hub involved, don't forget to check the cable between the computer and the hub as well as the power supply for the hub. Also make sure the computer is properly grounded to the station's common ground point and the shield has a good contact to the motherboard groundplane and the chassis. If the noise is from the RS-232 side of the USB to RS-232 converter, place a jumper across the RF choke in pin 5 of the RS-232 connector (Elecraft RF Immunity Mod - www.elecraft.com/K3/mods/ELECRAFT_Application_Note_Improving_the_Immunity_of_ the_Rear-Panel_KIO3_RS232_and_Audio_Connectors_to_RF.pdf. In addition, consider making your own RS-232 cable using K9YC's suggestions (CAT5 cable with pins 2,3,4 7 each on a separate pair with the other wire of each pair connected to the shell of the connector). The K9YC cable makes the RS-232 signals balanced and cancels any radiated noise using the magic of twisted pairs. 73, ... Joe, W4TV __ 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] Noise with KUSB
Thanks for the replies, all. I'm using a laptop PC with 3 USB ports. With mouse, keyboard, harddisks and other devices I am using 3 USB hubs Plugging the cable from the K3 directly into a USB port on the PC does not remove the noise. The hub doesn't have a PSU, but there are a lot of small switch mode PSU's in the shack of course. The noise is present regardless of HRD is running or not... It is really not good to keep the log on paper. What can I do? \Svend TDC Bredbånd for 0 kr. - Spar 695 kr. Se http://tdc.dk/freemailtilbud/ Denne mail er sendt via Mail på TDC Online - Læs mere om TDC's mailtjeneste på http://mail.tdconline.dk/ __ 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] FS: Weller soldering irons
For Sale: Refurbished or NOS Weller soldering irons These Weller irons must be used with the appropriate Weller base unit. Consult the BAMA web site for Weller manuals for additional details, or feel free to ask me. EC1201A with ETA tip and new silicon cord (ESD black) -- $70 TC-201P with PTA7 tip and new silicon cord (white) -- $50 TC-201P with PTA7 tip and original silicon cord (faded white) -- $40 PayPal, money order or checks accepted, with normal clearing period before shipment. Shipping will be charges USPS Flat Rate box, unless buyer prefers other method. Inquiries: Contact w9gb at arrl dot net. G. Beat w9gb __ 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] USB to Serial at 1500 watts Part II
The USB to serial port stopped working for goodwhen I was on 80 meters. The way I new is that N1MM Logger lost connection and could not reattach to the K3. I tried the K3 Utility...nada. This only happened on 80 meters. Yes, I have a good RF ground. Coax feed to the dipole. Tuner. etc. All grounded (RF) together ... bonded ...to a ground system that consist of a 8 foot rod in the floor of the shackbonded to the towerbonded to three other rodsbonded to the house. Sill, I think it was RF for some reason. Now then, I have not had this happen to a simple RS232 cable from the Rig to the Puter. Could the electronics of the USB device be blown as the cable acts like an antenna? I don't want to make a stink over this...just want to know peoples experience. Also, lets assume that RF can do weird thing...and everyone's set up or circumstances are different...but I have done what the book suggests. Lee - K0WA The New Kansas QSO Party - August 29, Sat 9am-9pm and August 30 Sun 9am-3pm CDT More Info at: http://www.ksqsoparty.org/ In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? __ 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] K3 line-input question
Well, got home and what do you know. All is well again. I fiddled around with the mic selector in the firmware, switching it from line-in to FPL then back to line-in and everything went back to the way it was last night. scratches head Okey dokey. I can live with that. 73 de James -- 73 de James K2QI __ 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] USB to Serial at 1500 watts Part II
Could the electronics of the USB device be blown as the cable acts like an antenna? I don't want to make a stink over this...just want to know peoples experience. If you can induce more than 10V P-P of RF on the cable between the computer and the USB to serial adapter, it is theoretically possible that you could damage the USB UART. The fault mode would most likely be reverse polarity (below -.5V) on the 5V line (supply) or the input data lines (USBDP and USBDM). Sill, I think it was RF for some reason. Now then, I have not had this happen to a simple RS232 cable from the Rig to the Puter. The RS-232 data lines are inherently better protected for induced RF since RS-232 specified for +/-25V but operating levels are generally +/- 10V or so. To cause over/reverse voltage issues you would need to induce 20V P-P on the cable. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lee Buller Sent: Tuesday, August 04, 2009 7:32 PM To: Elecraft Reflector Subject: [Elecraft] USB to Serial at 1500 watts Part II The USB to serial port stopped working for goodwhen I was on 80 meters. The way I new is that N1MM Logger lost connection and could not reattach to the K3. I tried the K3 Utility...nada. This only happened on 80 meters. Yes, I have a good RF ground. Coax feed to the dipole. Tuner. etc. All grounded (RF) together ... bonded ...to a ground system that consist of a 8 foot rod in the floor of the shackbonded to the towerbonded to three other rodsbonded to the house. Sill, I think it was RF for some reason. Now then, I have not had this happen to a simple RS232 cable from the Rig to the Puter. Could the electronics of the USB device be blown as the cable acts like an antenna? I don't want to make a stink over this...just want to know peoples experience. Also, lets assume that RF can do weird thing...and everyone's set up or circumstances are different...but I have done what the book suggests. Lee - K0WA __ 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] Dilemma: K1 or KX1 - I can't decide
While I hang around the recovering from my back surgery and a nasty case of pneumonia, I've run out of projects that require melting solder. This of course means its time to order another kit. After spending hours (I have lots of time) researching kits, I, naturally, arrived back at Elecraft.com reading the QST reviews of the K1 and KX1. I've built them both before and it will certainly be a joy once again regardless of which I choose. It seems I just can't operate cw with the K3. Not that it isn't fantastic - its just, well, too easy. So another QRP radio is what I need. I just can't seem to decide between the KX1 and the K1. And, no, I can't buy both. I did look at a few single band kits. But then I start pinging and ponging over 40 VS: 20. I gotta have both. So, what? flip a coin? Have my wife choose? Dilemma. 73, Doug -- K0DXV __ 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] Dilemma: K1 or KX1 - I can't decide
I just can't seem to decide between the KX1 and the K1. And, no, I can't buy both. I went through the same motions. Many times. I'm about to go through it again. In a nutshell, IME: K1 - analog soul sound not found in 99% of radios. Can't explain it. - insanely quiet receiver - Simple platform, well laid out internally - lends itself well to mods, has room for tweaking in the chassis - internal battery option is fiddly and cumbersome KX1: - by far the number one best feature is easy of deployment, or rephrased, minimum time between I think I want to get on the air and actually getting on the air, especially when equipped with a BNC to dual banana jack connector. - minimum space. Truly a take it with you everywhere rig. In summary, IMHO, figure out what you want to do with the rig. If you plan to use it as a bedside rig or field / picnic table use, K1. If you plan to use it for carrying all the time so you can set it up and get on the air in the shortest amount of time possible, such as during lunch breaks at work, etc..., KX1. I want both! .. __ 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] Magnetic Loops
Mike Underhill G3LHZ had some good ideas but his ideas that the theoretical loop equations were not valid were totally wrong. When I was active on 136kHz some years ago I used a large vertical loop and got reasonable results - in a QTH where I was severely restricted in what I could use on those frequencies. At one time I more or less proved to myself that the loop was performing pretty much how the theory predicted and G3LHZ's suggestions that it should be 100 times better (or whatever) were complete rubbish. You can find more information on the 136kHz pages on my website, with calculations on both the traditional loop equations and G3LHZ's (very old pages, not updated for yonks, but for some reason still seem the most visited pages on the whole site...). 73 Dave G3YMC On 4 Aug 2009 at 21:57, d.cut...@ntlworld.com wrote: I went to one of those lectures by Prof Mike Underhill (G3L??) in front of his IEE peers who did not receive his wisdom too readily. It seemed like a one-man campaign. In essence he postulated that a mag loop was more like a short folded dipole and he showed why. The usual calculated losses were insufficient to show why loops worked the way they did. I once made a loop from 12ft x 4ft sheet aluminium with a huge capacitor 4ft x 6inch vanes spot welded to the ends (that was an education in itself). It was incredibly impractical, but I did it anyway. I measured a 46dB front to side attenuation. I scrapped it soon afterward. David G3UNA http://www.davesergeant.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
