Re: [Elecraft] Antenna Quandary

On 5/12/2022 3:08 PM, Ed Cole wrote: I have ends supported with nylon cord over pulleys to lower for cutting. Yes, and it's a MUST for any wire where one or both ends are rigged to a tree with one end tied to a weight to allow for tree sway in the wind. K2RD showed me how to do that without h

Re: [Elecraft] Antenna Quandary

Unbelievable answers (really). If someone asked if anyone was knowledgeable about contesting or say eme, would you just answer yes or no? Or would you offer assistance to the questioner? My first ham antenna was a folded dipole for 40m. It was described in my first ARRL Handbook as there we

Re: [Elecraft] Antenna Quandary

On 5/11/2022 10:20 PM, Jim Brown wrote: Low dipoles are closer to 50 ohms, high dipoles are closer to 75 ohms. Low would be much less than a quarter wave, high would be much more than a quarter wave. BTW -- there are a couple of very useful graphics that help understand this at the beginning

Re: [Elecraft] Antenna Quandary

On 5/11/2022 6:51 PM, Richard wrote: Jim — I just finished building a half-wave 40-meter dipole and have it nicely tuned for the middle of the SSB segment. Out of necessity, the tuning process was carried out with the antenna horizontal. Feedpoint Z of horizontal antennas is slightly affecte

Re: [Elecraft] Antenna Quandary

Wa Half wave On Wed, May 11, 2022, 20:09 Hank via Elecraft wrote: > I wish I knew as much about half wave dipoles as I think I do. > > Hank > K4HYJ > > > On May 11, 2022, at 10:52 PM, Edward Mccann wrote: > > > > Concur. > > > > Slack reasonable cut. > > > > No dumb questions, just dumb an

Re: [Elecraft] Antenna Quandary

I wish I knew as much about half wave dipoles as I think I do. Hank K4HYJ > On May 11, 2022, at 10:52 PM, Edward Mccann wrote: > > Concur. > > Slack reasonable cut. > > No dumb questions, just dumb answers, from time to time. > > But I’m amazed at the restraint shown by many who are avoid

Re: [Elecraft] Antenna Quandary

Concur. Slack reasonable cut. No dumb questions, just dumb answers, from time to time. But I’m amazed at the restraint shown by many who are avoiding the tithe of arms-appointed expert, especially when we have a passel of Big Swinging Dudes on the line. The query might have been a bit more fo

Re: [Elecraft] Antenna Quandary

Mine is well-behaved. On 5/11/2022 1:56 PM, Richard W4KBX wrote: > Anybody out there super-well versed in the behavior of the half-wave dipole? > > Cheers, > > Richard Kunc > W4KBX __ Elecraft mailing list Home: http://mailman.qth.net

Re: [Elecraft] Antenna Quandary

*"On the other hand, cutting the guy some slack is ok too. This is a tough room but the only dumb question is the one you don’t ask."* I dunno... "Is the Pink Panther a lion" is up there in essential dumbitude. https://youtu.be/J0UVlPmhY0A 73, Gwen, NG3P On Wed, May 11, 2022, 10:20 PM Lou Lader

Re: [Elecraft] Antenna Quandary

On the other hand, cutting the guy some slack is ok too. This is a tough room but the only dumb question is the one you don’t ask. 73, Lou W0FK Lou Laderman Sent from my mobile device On May 11, 2022, at 9:09 PM, Edward Mccann wrote: Entirely possible this is a late April Fool’s query, or

Re: [Elecraft] Antenna Quandary

Entirely possible this is a late April Fool’s query, or a freshman fraternity prank designed to bring out the blowhards who will profess knowledge of most things. When and if the query is expanded to source commentary from those “super-well versed” in the behavior of the OCFD, from under the

Re: [Elecraft] Antenna Quandary

"Anybody out there super-well versed in the behavior of the half-wave dipole?" There are only two possible answers: Yes No I speculate that, given the expertise of this group, "Yes" is the right answer. However, I have no clue how the answer to your question will be useful to you. I suppose t

Re: [Elecraft] Antenna Quandary

On 2022-05-11 8:02 PM, Jim Brown wrote: > On 5/11/2022 1:56 PM, Richard wrote: >> Anybody out there super-well versed in the behavior of the half-wave >> dipole? > > You do have a copy of the ARRL Handbook, don't you? Every ham should > have one, and there's a lot of tutorial material in it. Tw

Re: [Elecraft] Antenna Quandary

On 5/11/2022 1:56 PM, Richard wrote: Anybody out there super-well versed in the behavior of the half-wave dipole? You do have a copy of the ARRL Handbook, don't you? Every ham should have one, and there's a lot of tutorial material in it. I'd bet that every single one of those engineers who g

Re: [Elecraft] Antenna Quandary

They are known to radiate 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County Richard wrote on 5/11/2022 1:58 PM: Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __ Elecraft

Re: [Elecraft] Antenna Quandary

You're a lot less likely to get an answer to that question than you would the answer to whatever question you actually want answered. Dave   AB7E On 5/11/2022 1:56 PM, Richard wrote: Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __

Re: [Elecraft] Antenna Quandary

It's showing up on the reflector. Kind of leading, no win question. But I'm a suckered. Been using 1/2 wave dipoles for 60 years. What is the question? On Wed, May 11, 2022, 5:06 PM Richard wrote: > I’m trying to send this to the reflector at large, but it keeps attaching > John’s name. Sorry,

Re: [Elecraft] Antenna and Propagation class notes addendum

On Sat, Feb 13, 2021 at 11:11 AM kevinr wrote: > ...I found a few Bessel functions which still give me pause... === Yep. 73, Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Hel

Re: [Elecraft] Antenna Support Poles, Mil-Surplus SOLD

That was fast - the poles and bag are sold. Jim Bennett Folsom, CA K7TXA (ex W6JHB as of 1/22/2021) Being retired doesn't mean I'm not part of the work force - just that I'm not forced to work! > On Jan 24, 2021, at 3:30 PM, James Bennett via Elecraft > wrote: > > In my continuing effort

Re: [Elecraft] Antenna tuners

More than just them.  Steve, K6OIK, who has presented at a number of past Pacificons speaks about the Myths of Conjugate Matching in a Pacificon presentation from 2011 at https://www.fars.k6ya.org/docs/Conjugate-Match-Myths.pdf It begins on page 20.  This is Dr. Stearns home turf, it can be a l

Re: [Elecraft] Antenna tuners

Wasn't there a debate between Maxwell and Walter Bruene (designed the Collins 30L1) on the conjugate match...I think Bruene disagreed with the popular notion of a conjugate match. Jack BMW Motorcycles Chuck KE9UW c-haw...@illinois.edu Sent from my iPad > On Jul 18, 2020, at 3:01 PM, Gary Peter

Re: [Elecraft] Antenna tuners

I very vaguely remember there was a different optimum length for the others, thanks! 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 7/18/2020 12:25 PM, W2xj wrote: That only applies to class A stations with protected skywave. Otherwise, something near 225 degrees is best. Sent fro

Re: [Elecraft] Antenna tuners

That only applies to class A stations with protected skywave. Otherwise, something near 225 degrees is best. Sent from my iPhone > On Jul 18, 2020, at 11:33, Fred Jensen wrote: > > And the Texas Bug Catcher, Webster BandSpanner, SteppIR's, et al. All > represent changes to the antenna itse

Re: [Elecraft] Antenna tuners

And the Texas Bug Catcher, Webster BandSpanner, SteppIR's, et al.  All represent changes to the antenna itself, which would also include changing the height [e.g. cranking the tower up and down] and possibly cutting down nearby trees or metal buildings [:=).  Any change to the antenna itself or

Re: [Elecraft] Antenna tuners

Save one; the screwdriver antenna on my truck is tuned (coil adjusted) by the TurboTuner attached to my radio until a match is found. And an argument could be made that a SteppIR controller performs a similar function. The rest are matching circuits to compensate for the disparity of input to

Re: [Elecraft] Antenna tuners

That's not in the least true, but those among us fixated on semantics continue to push that tired old myth. You could, for example, have an antenna with a feedpoint impedance of 50 - j40 ohms, and if you insert 40 ohms worth of inductance in series with the feedline at the feedpoint you wil

Re: [Elecraft] Antenna tuners

On Friday, July 17, 2020, 10:03:24 PM EDT, Fred Jensen wrote: > No antenna has, at any time, anywhere in any of our lifetimes, been > "tuned" by an "antenna tuner." Unless the "tuner" is simply a broadband transformer, I might agree. But if the "tuner" is an LC network, like an adjustable L n

Re: [Elecraft] Antenna tuners

No antenna has, at any time, anywhere in any of our lifetimes, been "tuned" by an "antenna tuner."  So called antenna tuners are 2-port impedance matching networks ... all of them ... and their job is to match the impedance on one port to another impedance on the second port, period.  Nothing g

Re: [Elecraft] Antenna tuners

On Friday, July 17, 2020, 7:10:32 PM CDT, Kurt Pawlikowski wrote: > Ken: In some respects, a "matching device" at the base of the antenna is a > tuner! {'-) It accomplishes the same function... {'-) k > WB9FMC On Friday, July 17, 2020, 08:21:54 PM EDT, Ken Roberson via Elecraft wrote: >

Re: [Elecraft] Antenna tuners

Dave - RRR - 73 Ken K5DNL On Friday, July 17, 2020, 7:24:10 PM CDT, Dave Cole wrote: Tuners...  Tuners...  We don't need no stinking tuners...  Real men use antennas that don't need stinking tuners... Sorry I had too... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer

Re: [Elecraft] Antenna tuners

Tuners... Tuners... We don't need no stinking tuners... Real men use antennas that don't need stinking tuners... Sorry I had too... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 7/1

Re: [Elecraft] Antenna tuners

Kurt, We are not tuning the antenna , we are matching the antenna to the coax at the base of the antenna. 73 Ken K5DNL On Friday, July 17, 2020, 7:10:32 PM CDT, Kurt Pawlikowski wrote: Ken: In some respects, a "matching device" at the base of the antenna is a tuner! {'-) It accompl

Re: [Elecraft] Antenna tuners

Ken: In some respects, a "matching device" at the base of the antenna _/is/_ a tuner! {'-) It accomplishes the same function... {'-) k WB9FMC On 7/17/2020 6:34 PM, Ken Roberson via Elecraft wrote: Antenna tuners I never use an antenna tuner , on the MF and LF bands realmen use a scopematch at

Re: [Elecraft] Antenna Routing

Thanks, Mike It's a K3S, so it has the upgraded KSYN3As Gareth, M5KVK On 28/05/2020, 18:29, "Mike Harris" wrote: Did I read at some stage that you do not have the internal ATU? That being so you will not have selectable ANT 1 or ANT 2. That being the case you will only have AN1 1

Re: [Elecraft] Antenna comment

John, NT5C (now SK) was a very smart guy, and well educated in both geology and electromagnetics. He searched for his QTH via deed and terrain records, and the first screen was "must drain into 2 or more watersheds". He found a killer spot with gently sloping foreground in almost all direction

Re: [Elecraft] Antenna or KAT500/KPA500 Problem

I did a lot of testing with a tuner followed by a high-quality DX Engineering balun in a system with high, reactive SWR. I did not push it far enough to destroy the balun, but I did note a gradual increase in SWR. And yes, the rate of increase sped up as it got hotter. So I suggest testing just

Re: [Elecraft] Antenna or KAT500/KPA500 Problem

It is possible that the ferrites are heating. If that is the case, you could test it by transmitting a steady carrier for a minute while watching the SWR. If it’s heating, there should be a gradual rise. Twin lead will change characteristics significantly when it gets wet. So will ladder line, a

Re: [Elecraft] Antenna or KAT500/KPA500 Problem

On 8/6/2019 7:00 PM, Mike Lichtman via Elecraft wrote: All thoughts are appreciated. The antenna itself has worked fine for me on all bands (80 thru 10) You should buy yourself a copy of the ARRL Antenna Book and learn about how to build your own antennas. That tube contains a lot of little

Re: [Elecraft] Antenna tuner range

Steve, The range of the T1 and the internal KX3 are about the same. PS - why do folks insist on putting hyphens in the Elecraft model numbers - they do not belong, it is KX3 and not KX-3. Look at the sales brochure or the webpage. 73, Don W3FPR On 3/6/2019 8:17 PM, Steve via Elecraft wrote:

Re: [Elecraft] Antenna switching question

The KAT500 remembers its settings for each band/port combination. You can connect several antennas to a given port through external switches, but if two of those antennas are ever used on the same band, there is a danger that the KAT500's settings that work with one of the antennas will be wrong fo

Re: [Elecraft] Antenna switching question

Or, perhaps experienced users can tell me that the tuning works quick enough that even if I try to confuse it the KAT500 will be quick enough that it isn't an issue. Since there is no overlap among the 160m inverted-L, LPDA (20-10) and 6 meter Yagi, I would put them on the manual switch on one

Re: [Elecraft] Antenna switching question

Chuck, Since you have a manual switch for your antennas -- Consider your operating habits. Connect the 2 antennas you most frequently use to their own KAT500 port, then connect the others through your switch. Since you have the vertical which covers all bands, and other bands that overlap ban

Re: [Elecraft] Antenna tuning or matching unit

I agree with Ron in that one must understand using an ATU at the transmitter does not change feedline loss. In fact it adds additional system loss due to loss incurred in the tuner. If the transmitter can not deliver rated power into the load that is a different issue to resolve. The ATU may a

Re: [Elecraft] Antenna tuning or matching unit

. Winter has hindered my latest experimental antenna. NVIS is better than nothing :-). 73, Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Ron D'Eau Claire Sent: Tuesday, February 20, 2018 9:36 PM To: elecraft@mailman.qth.net Subject: Re: [Ele

Re: [Elecraft] Antenna tuning or matching unit

, February 20, 2018 8:10 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Antenna tuning or matching unit On this subject, it may be of interest to point to the article on my website www.w3fpr.com "Antennas, Transmission Lines and Tuners". This article first appeared in QRP Qu

Re: [Elecraft] Antenna tuning or matching unit

Alan your explanation opens the door to erroneous conclusions. Frequently a feed line does NOT have a low SWR by design. It is still a feed line in that it carries RF from the transmitter site to the radiator with a minimum of radiation from itself. A classic example is the Zepp antenna: a 1/2 wave

Re: [Elecraft] Antenna tuning or matching unit

On this subject, it may be of interest to point to the article on my website www.w3fpr.com "Antennas, Transmission Lines and Tuners". This article first appeared in QRP Quarterly in July 2001. I am pleased that DXzone has also recognized that article and has included it in its Antennas/Theory

Re: [Elecraft] Antenna Analyzer (FA-VA4)

Simple. Connect the analyzer output to one antenna, the input to the other.  Set the sweep range for that where you want to look at antenna coupling (usually one band for which the antennas are used). Make a sweep and tell the analyzer software to display S21 in dB.  S21 is the gain of a device

Re: [Elecraft] Antenna Analyzer (FA-VA4)

In this case think of the network analyzer as a transmitter with a receiver tuned to the same frequency.  Before testing you connect the two together and normalize the receiver response to unity at each test frequency. Now connect the transmitter port to one antenna and the receive port to the o

Re: [Elecraft] Antenna Analyzer (FA-VA4)

Hi, That ought to be fairly straightforward. Connect one antenna to the the output port of the analyzer and the other antenna to the input port. Then set the sweep for the frequency range you want to test. AB2TC - Knut wc1m wrote > Jim wrote: > >> Note also that this is a vector NETWORK analyz

Re: [Elecraft] Antenna Analyzer (FA-VA4)

Jim wrote: > Note also that this is a vector NETWORK analyzer. A NETWORK analyzer has > input and output ports, so that in addition to impedance and TDR, it can also > measure the response of any system. You can, for example, measure the > effectiveness of filters, and the coupling between adja

Re: [Elecraft] Antenna Analyzer

easy to build and compares > favorable to more expensive models: > https://ae5x.blogspot.com/2017/10/new-antenna-analyzer.html > > More here: > https://ae5x.blogspot.com/2017/11/a-brief-comparison-of-two-antenna.html > > > 73, > John AE5X > > >

Re: [Elecraft] Antenna Analyzer

Bob and all, The "classic" formula for a wire half wave dipole (known to most hams) is 468/F (length in feet and frequency in MHz), and your "492 x K" factor is correct. Sorry for those who use metric, you will have to convert) However, that may not lead to a resonant antenna due to a numbe

Re: [Elecraft] Antenna Analyzer

Agreed.   I've always said hams cut an antenna a bit long and then trim it to get the lowest SWR at the desired frequency. This does not necessarily make for a resonant antenna.    My 75M antenna is resonant at 3.8 MHz as determined using a Grid Dip Oscillator,  but the impedance is about 35 oh

Re: [Elecraft] Antenna Analyzer

I find that Jim's thoughts and findings are similar to mine. SWR is really not a good indication of how well an antenna works. One of my coax lines has a 1:1 SWR from 160M through 6M.  It doesn't receive well nor transmit well.  It' has a dummy load on the distant end. Along the same line, I h

Re: [Elecraft] Antenna Analyzer (FA-VA4)

On 12/1/2017 10:30 AM, Wes Stewart wrote: What calibrations are you doing that take an hour? You can do a master cal with lots of points in 5 minutes. Yes.  AND, more important, calibrations can be saved for standard measurement setups, so when you're always using a previous setup, there's n

Re: [Elecraft] Antenna Analyzer

Hi, Ronnie … There are a bezillion to choose from — big, small, graphical, TDR, need a computer or pad, etc, as others have pointed out. Another one you might consider is the iP30z (or iP60z) retailed through Buddipole. They’re a bit pricey compared to some options, but they have the advanta

Re: [Elecraft] Antenna Analyzer

Because new toys are always exciting? On 12/1/2017 11:09 AM, Jim Brown wrote: Why must every perceived problem be resolved by buying something? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http:

Re: [Elecraft] Antenna Analyzer

On 12/1/2017 4:49 AM, w5...@comcast.net wrote: But it struck me that it might be nice to add a small antenna analyzer to my kit. Why must every perceived problem be resolved by buying something? All Elecraft rigs, including the KX2, have an indicator for SWR that the rig sees. Resonance can

Re: [Elecraft] Antenna Analyzer

I have had the Comet analyzer for a year. Although a bit pricey for the number of functions, what it does, it does very well and is a very solid, well built, and easy to use device. With that said, I will add a VNA unit to my arsenal of analyzers soon. It sure would not hurt my feeling to see

Re: [Elecraft] Antenna Analyzer

ater resistant > sealed cases. These can get damaged in a wet environment. > > > > > > > > T-Original Message- > > From: elecraft-boun...@mailman.qth.net [mailto:elecraft-bounces@ > mailman.qth.net] On Behalf Of Jim Sheldon > > Sent: Friday, December

Re: [Elecraft] Antenna Analyzer (FA-VA4)

What calibrations are you doing that take an hour? You can do a master cal with lots of points in 5 minutes. I use mine in the field all the time using a Win 10 touch screen tablet.  The software is phenomenal.  I've been doing network analysis since the days when the calibration curve was a g

Re: [Elecraft] Antenna Analyzer

Subject: Re: [Elecraft] Antenna Analyzer I have several antenna analyzers. The best value I think is the YouKits FG-01 <https://www.vibroplex.com/contents/en-us/p190.html> .  It's price is on the lower end of the scale. It's color display and feature set are outstanding. I also

Re: [Elecraft] Antenna Analyzer

The RigExpert AA-1400 fits perfectly in a $40 Pelican 1200 case. I have mine, charger, batteries, etc in a nice Red 1200. I would post a pic, but you can't on this reflector. Mike va3mw On Fri, Dec 1, 2017 at 12:19 PM, George Thornton < gthorn...@thorntonmostullaw.com> wrote: > The Time Domai

Re: [Elecraft] Antenna Analyzer

raft-boun...@mailman.qth.net] On Behalf Of Jim Sheldon > Sent: Friday, December 1, 2017 5:39 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] Antenna Analyzer > > I was introduced to the SARK-110 several years ago and besides being an > excellent antenna analyzer, it h

Re: [Elecraft] Antenna Analyzer

: elecraft@mailman.qth.net Subject: Re: [Elecraft] Antenna Analyzer I was introduced to the SARK-110 several years ago and besides being an excellent antenna analyzer, it had one feature that nobody else had (when I bought the SARK) and that is called a "Time Domain Reflectometer". This a

Re: [Elecraft] Antenna Analyzer

I have several antenna analyzers. The best value I think is the YouKits FG-01 . It's price is on the lower end of the scale. It's color display and feature set are outstanding. I also have the MFJ 223 which is very compact and highly functio

Re: [Elecraft] Antenna Analyzer (FA-VA4)

I have one more suggestion. I have a MiniVNA Tiny, expensive at about $600, but it is a full two port Vector Network Analyzer in a 2.5" X 2.5" X 1" box connected via USB. It has both a computer app and a phone app to run it. I have taken it out in the field where I would never consider taking a 75

Re: [Elecraft] Antenna Analyzer (FA-VA4)

The choice of analyzers is not that simple unless cheap price is the only factor. I have four analyzers: Rigexpert 230Pro, FA-VA4, VNWA3 and Mini60. Rigexpert covers up to 230 MHz and costs about $500. It is the easiest to use and has the most functionality. Less accurate because it does not have

Re: [Elecraft] Antenna Analyzer

+1 73, Igor UA9CDC 01.12.2017 18:23, John Oppenheimer пишет: The SARK 110 is very small with many features: http://www.sark110.com/ John KN5L __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http

Re: [Elecraft] Antenna Analyzers

It would be nice if Elecraft had their own branded analyzer. It could be a semi kit like the graphing one being sold from Germany. 73 Mike KF6KXG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http

Re: [Elecraft] Antenna Analyzer (FA-VA4)

John, I saw that one on FunkAmateur/Box73, they sell the kit. What appeals me is the price (155 euro), the simplicity the way it can be built, the features, apart form being a nice graphical analyzer it's much more like a signal generator from 100 kHz to 100 MHz. It's readable in direct sunli

Re: [Elecraft] Antenna Analyzer

These were very useful devices from "back in the day". I see a couple available on ebay by searching for "Palomar noise bridge" Mike, AB9V On 12/1/2017 7:49 AM, w5...@comcast.net wrote: just a quick question for the collective group here. I have built up my KX-2 travel kit. The first week of

Re: [Elecraft] Antenna Analyzer

Having a graph of the entire band is so helpful, The AA series make for a single button test... You adjust, then hit the go button. You then see exactly what happened to your SWR dip. Did it go too far, not far enough, etc. Others, you have to fuss with knobs to find the dip, then remember

Re: [Elecraft] Antenna Analyzer

I have had good luck with this one. Very small and works well. https://youkits.com/products/youkits-fg-01-1-72mhz-antenna-analyser -- Sent from: http://elecraft.365791.n2.nabble.com/ __ Elecraft mailing list Home: http://mailman.qth.ne

Re: [Elecraft] Antenna Analyzer

th Chart plots and other stuff too. You can control it with a computer via USB too. No financial interest in the company, just a very happy user. Jim - W0EB -- Original Message -- From: "John Oppenheimer" To: elecraft@mailman.qth.net Sent: 12/1/2017 7:23:20 AM Subject: Re: [Elec

Re: [Elecraft] Antenna Analyzer

I would have to agree. the Rigexpert AA series. Well made, drop proof and stand alone. Mike va3mw On Fri, Dec 1, 2017 at 8:23 AM, John Oppenheimer wrote: > The SARK 110 is very small with many features: > > http://www.sark110.com/ > > John KN5L > _

Re: [Elecraft] Antenna Analyzer

The SARK 110 is very small with many features: http://www.sark110.com/ John KN5L __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net

Re: [Elecraft] Antenna Analyzer

The AA series from Rigexpert is also very lightweight... 73s and thanks, Dave NK7Z http://www.nk7z.net On 12/01/2017 04:53 AM, John Stengrevics wrote: The RigExpert line is small. 73, John WA1EAZ On Dec 1, 2017, at 7:49 AM, wrote: just a quick question for the collective group here. I ha

Re: [Elecraft] Antenna Analyzer

The RigExpert line is small. 73, John WA1EAZ > On Dec 1, 2017, at 7:49 AM, wrote: > > just a quick question for the collective group here. I have built up my KX-2 > travel kit. The first week of november I took it with me to a cabin I leased > outside of Gatlinburg, TN for some portable op

Re: [Elecraft] Antenna 2

Either put a small 50 ohm load or leave it open. A short to ground may cause a PA device failure. Bob, K4TAX Sent from my iPhone > On Nov 28, 2017, at 5:19 PM, Jim Rhodes wrote: > > Well if you accidentally transmit into it an open might be better than a > short. Did you at least disable i

Re: [Elecraft] Antenna 2

Well if you accidentally transmit into it an open might be better than a short. Did you at least disable it using the utility program? Jim Rhodes K0XU On Nov 28, 2017 16:52, "Paul Ormandy" wrote: > Thanks for the replies. Hadn't thought of its use for sub rx or dummy load. > I have grounded out

Re: [Elecraft] Antenna 2

I think he was asking what Don answered to. Gary KA1J > > That doesn't explain how he expects the rig to short out the port for > Ant 2 . .. WHEN IT HAS BEEN SELECTED ... just because there is no > actual antenna connected to it.  I don't get the reasoning behind the > original query. > > Dave

Re: [Elecraft] Antenna 2

I believe he is actually operating into an antenna on Ant1 port. He switched to Ant2 to check the port isolation and would obviously switch back to Ant1 to operate.  I doubt grounding the non-selected antenna port would make any difference on TX and some use both ports for diversity RX.  If pro

Re: [Elecraft] Antenna 2

That doesn't explain how he expects the rig to short out the port for Ant 2 . .. WHEN IT HAS BEEN SELECTED ... just because there is no actual antenna connected to it.  I don't get the reasoning behind the original query. Dave   AB7E On 11/28/2017 7:04 AM, K9ZTV wrote: We hook dummy loads

Re: [Elecraft] Antenna 2

We hook dummy loads to ANT 2 on all our K3s during FD to prevent inadvertent transmissions when no antenna is connected to it. The ATU TUNE button is immediately above the ANT button and fat-fingered/far-sighted ops unfamiliar with the K3 have been known to hit the wrong one, especially on the

Re: [Elecraft] Antenna 2

I keep my dummy load connected to ANT 2 on my KXPA100. Might as well have it connected somewhere. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Nov 28, 2017, at 6:22 AM, Don Wilhelm wrote: > > Paul, > > There is some stray coupling between ANT1 and ANT2,

Re: [Elecraft] Antenna 2

Paul, There is some stray coupling between ANT1 and ANT2, but no direct path. The unused antenna is not grounded. One reason is that it can be used to feed the subRX AUX ANT input when using diversity. 73, Don W3FPR On 11/28/2017 2:36 AM, Paul Ormandy wrote: Hi all,     When messing aroun

Re: [Elecraft] Antenna 2

If you do not have anything on Ant 2 I suggest using the config utility to disable Ant 2 for now. This will prevent accidentally selecting Ant 2 and trying to transmit. -- Sent from: http://elecraft.365791.n2.nabble.com/ __ Elecraft

Re: [Elecraft] Antenna 2

If you selected Ant 2 it wouldn't have been "unused".   How is the rig supposed to know you don't have anything physically connected to that port? Dave   AB7E On 11/28/2017 12:36 AM, Paul Ormandy wrote: Hi all,     When messing around today with antennas, I had my aerial connected only to

Re: [Elecraft] ANTENNA QUESTION

As Wayne N6KR mentioned yesterday, "I’ll be speaking at Pacificon's antenna symposium tomorrow (Friday, Oct. 20th). My presentation, from 3:30 to 4:30 PM, is on antennas for ultra-portable HF operation. This talk was a late addition, a previous speaker having dropped out. If you’re interested in

Re: [Elecraft] Antenna Problems with K3 firmware 5.57

On 4/1/17 at 6:44 AM, elecraft@mailman.qth.net (Dick Bacon via Elecraft) wrote: ... that was to check and tighten the three screws on the bottom cover for the LPA transistors (p63 in assembly manual). I got the same advice, but mine were quite tight. If you have problems with erratic SWR or

Re: [Elecraft] Antenna Problems with K3 firmware 5.57

This may not be directly related, but I had power indication problems in that the SWR and FWD power readings on my K3 had become erratic with surging of indicated power on CW from a setting of 50W up to 100W and over, yet a constant tune signal was rock steady at 50W. I thought it was an intermitte

Re: [Elecraft] Antenna Problems with K3 firmware 5.57

I agree, and you'll need pretty high Q components. Lots of good capacitor choices at HSC. Another suggestion though. KLIV is omni during the day, but strongly directional at night. This is quite common on the AM band. I suggest that you make your strength measurements at night. Depending on whe

Re: [Elecraft] Antenna Problems with K3 firmware 5.57

Bill, I would try an L/C series trap at the frequency of your offending BC band station across your antenna feedline. That should not be dependent on the IN/OUT impedance requirement of the DX Engineering BC band filter. 73, Don W3FPR On 3/31/2017 5:36 PM, Bill Frantz wrote: The voltage

Re: [Elecraft] Antenna Problems with K3 firmware 5.57

Use a series-tuned “wave trap” on KLIV’s frequency across your feedline. That will short out the feedline at that frequency. It will add some inductive load above the resonant frequency, but the ATU can deal with that. The components need to be rated for the transmission line voltages, but they

Re: [Elecraft] Antenna switches

I use Diamond Antenna Switches originally purchased in Japan with good results. See http://www.diamond-ant.co.jp/english/amateur/equipment/equipment5_swi.html . The claimed isolation up to 200MHz for the two-port CX210A switch is 70dB. I have not actua

Re: [Elecraft] Antenna switches

That switch is rated at 2500W PEP but only 1000W CW. Has anyone used them at 1500W CW or RTTY? 73, Jim N7US -Original Message- Let's add some real numbers. I have a mechanical A/B switch DIAWA Model CS-201. Fairly inexpensive. Internally, it has a cavity design to provide isolation be

Re: [Elecraft] Antenna switches

Let's add some real numbers. I have a mechanical A/B switch DIAWA Model CS-201. Fairly inexpensive. Internally, it has a cavity design to provide isolation between the ports. Using an HP signal generator and an HP-3586C selective level meter the isolation of the switch was measured. The used

Re: [Elecraft] Antenna for 2nd receiver

I like the Pixel Loop (I think DX Engineering now makes it). It is vertically polarized and somewhat directional, which makes it work well for diversity. It works throughout the HF bands, can null local QRN, and has a feature to turn itself off when you transmit in order to protect its preamp an

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