K1ttt stubs. Email: Login required to view.

K1ttt stubs Distribution by Band. >Just plug it in and use it as is. We have 2 ant: one is x7 (10, 15, 20) and the other one a exp14 with 40m kit (10, 15, 20, 40). (Do a search in yahoo. Ας υποθέσουμε πως κάποιος θέλει να χρησιμοποιήσει, συγχρόνως, δύο πομποδέκτες, σε δύο διαφορετικές μπάντες και με τις κεραίες να βρίσκονται σχετικά κοντά. Ouvida em Bandeirantes/PR/B, no dia 27/10/2. net and click the Resource Details You will find this resource in just one category on our links directory. Technical Reference/Filters; The title of the main category is Filters and it deals mainly with A wide collection of RF Filters, band-pass filters. Improve this question. Could I tee the extra tuner into my coax, and tune it to K1TTT stubs. He has written a book, it is a compilation of of information entitled: Managing Interstation Interference, coaxial stubs and filters I recently bought a copy of the book and it is great. But I took one of my stubs to a > friends QTH > and he was able to show me that my stub did indeed 0 Followers, 85 Following, 30 Posts - @k1ttt. On 10/10/2012 12:48 PM, Al Kozakiewicz wrote: Trim the stub so that the change to SWR when connected is minimal. com). But I took one of my stubs to a > friends QTH > and he was able to show me that my stub did indeed 53 Followers, 117 Following, 0 Posts - See Instagram photos and videos from Kit Morgan (@k1ttt. I roughed out the length, Challenging 160m operation using a Kenwood TS-590S with 75 Watts and homebrew 160m Quarter Wave/80m EFHW. Those stubs should be plugged to a six pak box. Unless you are doing fast scan tv or some very unusual microwave stuff you'll never be bothered by the difference. net [TowerTalk] RE: [CQ-Contest] Testing Stubs, Dave Hachadorian [TowerTalk] RE: [CQ-Contest] Testing Stubs, Jim Wilcox; Previous by Date: [TowerTalk Mike, I agree that double-shielded coax might help (in fact, I should do that in my shack!) I've found that stubs and filters don't always make a big difference in the S-meter reading at the harmonic frequencies, but can nevertheless be very effective. This is about the cross country skiing opportunities at the The K1TTT Superstation in Peru, Massachu K1TTT XC Ski Area and DX Lodge 76 Followers, 133 Following, 0 Posts - See Instagram photos and videos from 﫦 (@k1ttt_y) Hello fellow TowerTalker's, I am getting ready to make the 10 coax stubs for my Multi-Two (with proper social distancing, of course) station for the CQWW SSB Contest per the diagram used by K9YC, K1TTT and K2TR (I can email it to you off list if you are not familiar). > > Those stubs should be plugged to a six pak box. W3LPL Receive Only Band Pass filters via K1TTT technical references site. net:7373 K0WL AR cluster server Admin, Dashboard, Bootstrap. net (David Robbins) Date: Thu Jul 3 01:27:40 1997: Scott Robbins wrote: > > > I have been doing some work on a SO2R contest station and have only > recently come to the question of using band stubs for nulling out > unwanted signals. I I am trying to make reduce interstation interference for our Field Day operation by utilizing quarter-wave coaxial stubs. 73, Jukka OH6LI >-----Original Message----->From: cq-contest-bounces@contesting. General Grievance. The Amateur Radio contesting world has forever been changed by the generosity and ingenuity of Dave, K1TTT. 7 Meters (160 feet) high. But here's another idea, and I'd like some feedback. Introduction. 50 KHz | October 16, 2020 | 14:20 UTC#K1TTT #HF #20m Sep 7, 2015 06:36:49 PM, ve9aa@nbnet. Time vs Bands. SO2R – probably no other term in amateur radio contesting is more talked about, and less often understood. K1TTT Note tecniche: Molte idee articoli Interessanti Baluns, trasformatori etc. As far as I know this specific diplexer design is original, and has not been published. feedback. Find Events Sell Tickets Get Started Start selling tickets in less 15 minutes. L is the termination impedance. 1,845 likes · 1 talking about this. I've found that stubs and filters can be > quite effective at getting rid of that kind of interference. Search to find the event you are looking for on Stage Stubs. I used the K2TR drawing, and cross There are 1, 2, or 3 stubs as described below between the amp and the antenna. The picnic is open to all YCCC members and anyone interested in This will probably be mostly videos from my AR-Drone because they are much larger than I would like to serve from my own web site. Login is required for telnet packet cluster connections. net (Michael Tope): Date: : Thu, 1 Apr 1999 04:38:39 +0100 Needless to say, it now does not work :-) Is there a way to use the MFJ-207 or '247 in conjunction with a 50 resistor for measuring stubs? I know it won't be as accurate, but can it work somehow to get by for now? On 10/10/2012 10:43 AM, K1TTT wrote: For years I measured stubs with a tape measure. com] On Behalf Of ext >David Robbins K1TTT >I made my stubs for 20/15/10m out of catv hardline and it >seems to work Non è possibile visualizzare una descrizione perché il sito non lo consente. shorted stubs connected in parallel. The K1TTT Super Station is holding an open house on July 27, 2019, from noon to 4:00 p. 0 Followers, 8 Following, 0 Posts - See Instagram photos and videos from k1t (@k1ttt. asked Mar 19, 2012 at 20:58. k1ttt. If you have been reading the reflector for the past couple of days, the K3 we were using got a HI RFI message on the screen. Yes, the books says that someone is feeding the K3 more RF than it needs in the antenna terminals. Selected. html NT2X came up last night to get ready for the ARRL DX SSB contest that starts tonight. net web: ─ ꣑୧ KIT (@k1ttt_) on TikTok | 2527 Likes. I have read 'Managing Interstation Interference' by W2VJN, so I know the combination of stubs I need to make. I could use a lumped element filterin my transmission line pre-tuned to null (attenuate) him. k1ttt) on Instagram: "Dexter S1:12-16:25" The location of the stub may change the tuning due to some reactance introduced when the stub is slightly off its tuned point, but the correct length is measured from the T connector where it is inserted not including any other cable between it and the amp or other equipment. Iniciar sesión I've found that stubs and filters can be > quite effective at getting rid of that kind of interference. I have a six-way RF relay set that I plan to use to switch the stubs. \ I did measure with the T in line and also the coax switches (I say switches as one is a coax switch, and one is Teed off to potentially just switch stubs) Tonight I took all that switching out of line and no change. I roughed out the length, Estação (Ham): K1TTT. 0. 51 likes · 2 talking about this · 2 were here. com Sent: Wednesday, September 13, 2017 11:27:44 AM Subject: Re: [RFI MiniVNA says the stubs suppression is -65db and the stubs are placed directly on the 6x2 switch at the 40M output but no reduction of interference is shown. I thought it was a great idea combining the stubs with the 3-pole bandpass filter. 1 and d. com> on open stubs I recommend cutting back the center conductor and closing the shield over it, but of course not connected to it. This article focuses on RTTY contesting as Single Operator using 2 Radios (SO2R) with references to using WriteLog for Windows. html 1/ 2 Referencia técnica K1TTT K2TR Coax Stub Filters there are lots of possible combinations k2tr did a good job of minimizing the number of stubs needed for a 6 band HF contest station in his design here: Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers. Ham Member Lookups: 480335 : Biography; Detail; Logbook; Log a NEW contact with : 6292629 Last modified: 2015-07-16 00:28:52, 0 bytes . I followed the example from W2VJN book, for 40m band: 1/4 wave coupling cable (between TX and "stub pack") 1/4 a very wide peak because of > the high impedance presented by the stub in parallel with the dummy load. Team K1TTT: W1TO WT2P N2KW K1TTT W3MLJ HC2AP K1BG NJ1F W1ZZ KW1DX NT2X WA2BOT N2HXTuve el privilegio y honor de participar en el CQ WW SSB 2021 operando la e Team K1TTT: http://www. An MFJ-259 will also do the job but is far away from being as accurate as of the DG8SAQ VNWA. > > When I measure the 1/4 wave shorted 40m stub, plugged directly on the > MFJ-259, with a dummy load paralelled by a tee connector, I can see the > nulls on 14 and 28mhz. terminology; stub; Share. I also use switchabale bandpass filters between Testing Stubs, k1ttt@arrl. Also includes information about contests and some free amateur radio software. m. The diameter of the drum formed by the large number of 1/4-wave some kind of pipes, on ground, lots of radials, fed with home brew Christman type network built with coax stubs and transformers. com">mailto:towertalk@contesting. Matt KM5VI -----Original Message----- From: TowerTalk [mailto:towertalk-bounces@contesting. Please feel free to report any bugs, suggestions and feature requests! you will need switch to switch stubs between 20 15 and 10! when you messure (optimize) your stubs you have to do that trough switch! technical refernce from K1TTT site will help you to chose stubs you need! you will need stubs on both anetnnas! 73 de oe1ems braco ----- Original Message ----- From: "Jim A friend of mine is making me up two relay-switched boxes so that we can run two stations on different bands at the same time without getting any local interference Nov 20, 2012 11:58:24 PM, sv1dpi@otenet. I like to keep them as close to the amp as possible, usually just a 'T' connector on the amp output or at the The book just confirmed the drawing at K1TTT’s site and is a textbook example of transmission line technology. support us Just plug it in and use it as is. Clean Up Your Signal with Band-Pass Filters, By Ed Wetherhold, W3NQN 1998 ,[ARRL Members only] 2 parts [–Part 1– , –Part 2– ]. Pricing The best value in the industry. Email: Login required to view. net [TowerTalk] RE: [CQ-Contest] Testing Stubs, Dave Hachadorian [TowerTalk] RE: [CQ-Contest] Testing Stubs, Jim Wilcox; Previous by Date: [TowerTalk On Mon, 4 Aug 2003 15:52:47 -0000 "Paul Playford" <w8aef@worldnet. One of them is dedicated to coax stub filters. First, what kind of coax is being used? Foam or solid PE dielectric? BIG difference in Vf, and small variations from one coax type number to another. — minor ' ⭐ taken<3 ☆ ∘ ˚. 3. My stub box is setup pretty much > like the switched stub box described on K1TTT's site and comes after the > amps. On Mon, 4 Aug 2003 15:52:47 -0000 "Paul Playford" <w8aef@worldnet. Let me explain how they are used. stub is the loss for the stub. But even when > they do, you'll hear the 2nd harmonic loud and clear within 1-2 KHz. ca wrote: I've seen the K2TR stubs, K1TTT page and have recently bought the FB book by W2VJN Today, for a change, I had a little spare time so built 2 stubs, but lets just concentrate on one. 15, Antenna Used MLA-30 Active Loop (I I am therefore looking at making some coaxial stubs and having them automatically switched as the antennas and bandpass filters are switched. DX Spots submitted by K1TTT. Hello to all I am trying to make stubs for my club and i need your help. I run a two radio single op station (SO2R) with one radio as my CQ radio and the other (on another band) as my Non è possibile visualizzare una descrizione perché il sito non lo consente. To: <towertalk@contesting. First, what kind of coax is being used? Foam or solid Now for the stubs. 14 MB; Downloads: 8; Updated: 2024-10-06; Categories: Program Files - Experimental; Download. • Ranging from 15 Meters (50 feet) to 48. 127 Followers. On 14187. SO2R RTTY Contesting with WriteLog Written by Don Hill, AA5AU February 10, 2004. Free hamradio callbook with very fast XML access for logging programs, recent activity, logsearch, condx prediction, multilanguage support etc. > > I use a combination of stubs and filters. Frequência: 28 MHz (10m). > > When I plug that stub and that very Sep 7, 2015 06:36:49 PM, ve9aa@nbnet. I could see myself again in the school’s RF lab drawing Q lines and SWR circles on A3 sized Smith chart 21/7/2020 Referencia técnica K1TTT www. 51 likes · 1 talking about this · 2 were here. Watch the latest video from ─ ꣑୧ KIT (@k1ttt_). net/webcam/simple5. Log in to Begin Your Session. I have trimmed the stubs separately, using the X reading on my MFJ259. Hello Dennis, Try looking up K1TTT and look under his technical info page on stub filters. When I measure the 1/4 wave shorted 40m stub, plugged directly on the MFJ-259, with a dummy load paralelled by a tee connector, I No biography available on QRZ. COM's full listing for K1TTT. 1,714 likes · 11 talking about this. I've seen the K2TR stubs, K1TTT page and have recently bought the FB book by W2VJN Today, for a change, I had a little spare time so built 2 stubs, but lets just concentrate on one. So, a long hiatus between band pass filter musings. > >The optimum distance from the transmitter (amplifier) varies >with the type of output network of the PA stage. Login is required for Suppose I'm at Field Day, operating CW on 40m. I could use a stub to attenuate him. COM for this callsign! Click here to see QRZ. For those of us who know Dave well, we understand he does not like to do things small. Networks >used in transmitters have greater or lesser (largely 2nd >harmonic) k1ttt working europeans during the cqww cw-contest , the mother of all contests , no computer cw here :- ) , keying is done with a mfj-564 paddle ,i love tha In this post, we’ll outline a testing strategy using stubs for an external API. I run a two radio single op station (SO2R) with one radio as my CQ radio and the other (on another band) as my 73 Frank W3LPL ----- Original Message ----- From: "David Robbins" <k1ttt@verizon. Hello fellow TowerTalker's, I am getting ready to make the 10 coax stubs for my Multi-Two (with proper social distancing, of course) station for the CQWW SSB Contest per the diagram used by K9YC, K1TTT and K2TR (I can email it to you off list if you are not familiar). Say a had an extra antenna tuner and a dummy load. In 1984, David Robbins moved to Peru, MA. d. gr wrote: Hello to all I am trying to make stubs for my club and i need your help. Look for Ham Radio related flights and maybe some fun with Pablo. Non è possibile visualizzare una descrizione perché il sito non lo consente. This is straight out of ON4UN's book. DX de Freq DX Flags Comments UTC Date Band Mode Valid. 0 Followers, 830 Following, 12 Posts - See Instagram photos and videos from (@t_k1ttt) Home Download For K1TTT – Run / Mult Station Status in Network Window. com] On Behalf Of Mike Smith VE9AA Sent: Monday, September 07, 2015 5:36 PM To: towertalk@contesting. k1ttt@arrl. These bands are not harmonically-related to other bands. Updated on March 17, 2005 & October 25, 2014. Author: n1mm; File size: 5. In Part 1, I laid out several reference sources for band pass filter projects. Login Required. That`s why, as Richard Clark noted, if the 1/4-wave shorted stubs are circled around into the form of a closed container, it makes a resonant cavity. For K1TTT – Run / Mult Station Status in Network Window « Back to All Downloads. net/technote/k2trstub. W7CY di CapYagi: Hai bisogno di una antenna . When I measure the 1/4 wave shorted 40m stub, plugged directly on the MFJ-259, with a dummy load paralelled by a tee connector, I Inicia sesión para seguir a creadores, dar un me gusta a videos y ver comentarios. I like to keep them as close to the amp as possible, usually just a 'T' connector on the amp output or at the There are 1, 2, or 3 stubs as described below between the amp and the antenna. QSO with K1TTT and VA2IM. com Subject: [TowerTalk] Coax STubs for SO2R I've seen the K2TR stubs, K1TTT page and have recently bought the FB book by W2VJN Today, for a Hello, I would like to have my AR cluster server added to your list if possible. Here I have a bit more detail on each project. It was supposed to be for the 40m transmitter. Go to k1ttt. (0 ohms is of course a shorted stub). 1 stub 46' SHORTED nulls 40m, 20m, 15m, 10m 160 Meters. Latest Spots submitted by K1TTT. My (new) Field Day Filter folder is At 06:45 PM 9/12/2005, Tom Rauch wrote: > > Some are open and some are shorted. I roughed out the length, ----- Original Message ----- From: "Gregg Seidl" <K9KL@centurytel. 1,140 likes · 2 talking about this. Latest Spots submitted by K1TTT/1. Access your employee documents, such as pay stubs, tax forms, and benefits information, with your Amazon login credentials. _) Mike, I agree that double-shielded coax might help (in fact, I should do that in my shack!) I've found that stubs and filters don't always make a big difference in the S-meter reading at the harmonic frequencies, but can nevertheless be very effective. I > have made several sets of stubs using various methods of tuning them > and > they just don't work at my QTH. Re: [TowerTalk] coax stubs /bandpass filter, Tom Osborne: Next by Date: [TowerTalk] RotorEZ Documentation, Pat Cahill: Previous by Thread: [TowerTalk] Balun and Open Wire line and Polyphaser, Drax Felton: Next by Thread: Re: [TowerTalk] CATV 1/2 can be used for Stubs ?, K1TTT: Indexes: [CQ-Contest] coax stubs, Marc Wullaert <= An Innocent Question about Grid-4's/Grid-Fields andHF, David Robbins K1TTT: Previous by Thread: [CQ-Contest] Need help with TR Log POST version 6. There are chokes at every antenna feed point too, so I too suspect real RF triggering the swr bridge as Olof and others have said. net web: ) > > When I plug radio A, on its minimum power level, to the stubs, and my > 40m antenna, and listen with radio B on the tribander, there is no > significant difference when I put Re: [TowerTalk] stubs for the SO2R setup, David Robbins K1TTT <= Previous by Date: [TowerTalk] How do I stop 2"-OD Chromoly mast from slipping in PST-61C rotator , WillFrazee #ARRL #DX #SSB #CONTESTAerial shots from the drone, once again I had the privilege of being part of the #K1TTT team to be among the first in the UNLIMITED MU Stubs: Τι είναι; Πώς φτιάχνονται; Το πρόβλημα. All Messages By This Member #566 Hi Bob, Yes, I remember your doing that last year. Dave Robins, K1TTT, did the analysis. Please feel free to report any bugs, suggestions and feature requests! Yesterday Xxtowers was here to repair the top 40m k0xg ring rotor and replace the 150’ 20m m2 20m4dx Yagi. My information is: Telnet access to: k0wl. Part 2 details the decision process, plus some notes on what happened with initial attempts at reproducing the K4VX Filter and NVARC filter projects. att. Hello, I am trying to make a set of stubs to be used on my SO2R station setup. All Messages By This Member #16761 K1TTT op DAVID, PERU, MA USA, received in Manchester England Loc IO83tl using Airspy HF + Discovery, SDR Console 3. If you dont know anything about them I suggest you visit K1TTT's site and read the coax stub article. Stubs are also widely used as filters on the VHF and UHF bands, too. net: Date: Wed, 09 Sep 2015 11:09:50 -0500 (CDT) List-post: <towertalk@contesting. He was very interested in contesting and became very active in the Yankee Clipper Contest Club. If something outside the Length: 23 feet / 7,1 meter of RG213 Termination: Open I used my DG8SAQ Vector Network Analyzerto cut the stub for the highest absolute impedance at 14,100MHz. David Robbins K1TTT e-mail: mailto:k1ttt@arrl. ddns. Right next to me, a station is operating on 20m. A time lapse video shot up at the K1TTT station during the 2008 North America QSO Party contest on Jan 19th. Descriptions and pictures of an amateur radio station. You make a shorted 1/4 > wave for 20 meters and it blocks what?I only have to do > this once a year for FD so I tend to forget!!??We Bandswitched coax stubs for SO2R John, G4DRS. More details will be on my maintenance blog shortly. The resource has been on our site since Saturday Nov 7 2009, and it has been viewed 1091 times. Feedback. Z. Unless you are doing fast scan tv or some > very unusual microwave stuff you'll never be bothered by the difference. Login is required for additional detail. 2 are the lengths of the stubs and Z. 62?, David Thompson: Next by Thread: [NA-User] New Super Check Partial Files Available VER20051015 (15 Oct05), Randy Thompson, K5ZD: K1TTT USA. After obtaining a small supply of the Hello fellow TowerTalker's, I am getting ready to make the 10 coax stubs for my Multi-Two (with proper social distancing, of course) station for the CQWW SSB Contest per the diagram used by K9YC, K1TTT and K2TR (I can email it to you off list if you are not familiar). After The 60, 30, 17, and 12-meter bands are absent from the table because stubs cut to pass or null these bands don’t have a similar response in any of the other HF bands. com> Sent: Wednesday, June 14, 2006 3:07 AM Subject: [TowerTalk] coax stubs > Can someone please refesh my memory. No biography available on QRZ. support us k1ttt@arrl. He has a lot of good info and links to sources. 80 Meters. Localidade: Peru - MA - USA. QSL info: About me ; Details ; Map ; Spots ; Log ; Statistics ; Propagation to K1TTT Search the callbook directly from Explorer 335 Followers, 451 Following, 3 Posts - ️ᴀɴᴋɪᴛ (@an. Everything's easy to build and the results look great. stub = 50 V = . We were operating at ED1R for some time now with the added stubs Dave, K1TTT has a great website with a lot of useful technical resources. They are bandpass >stubs, as per K1TTT's > > site, for a multi-transmitter setup I'm trying to get >going. 1) K1TTT United States of America (FN32II) In order to view this information you must be logged in. this page contains a number of packet clusters which are accessible on the internet via telnet in order to connect you must have a property configured telnet application on your computer The K1TTT Superstation in Peru, Massachusetts, Peru, Massachusetts. Email or user ID 899 Followers, 342 Following, 3 Posts - See Instagram photos and videos from (@k1ttt__y) DX Spots submitted by K1TTT/1. K1TTT XC Ski Area and DX Lodge, Peru. This page is for discussion about the K1TTT Superstation and operating there. K1TTT USA. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright – Tx/Rx filters plus coax stubs k1ttt. 024, às 21:20 horas UTC, fazendo chamad Yes, but it normally will provide a reasonable result unless you are doing something very particular like the 160m matching transformer and stub I just built [CQ-Contest] Stubs are not a joke: From: k1ttt@berkshire. We did indeed have coax stubs (K1TTT style) on the amp outputs but no luck. You will find On 10/10/2012 10:43 AM, K1TTT wrote: For years I measured stubs with a tape measure. Wednesday, June 07, 2006Presentation of the VE6JY Station by VE6OH (c) 8 Site info • There are currently 14 or 15 ? towers on this 30 Ha ( 80 Acres ) antenna farm. com> Subject: [TowerTalk] Tuning coax stubs w/ shack test equipment: From: : W4EF@pacbell. html #CQWWSSB2021 Tuve la dicha y el privilegio de operar la fabulosa estación #K1TTT, sin duda experiencia muy intensa, bastante enriquecedora y sobre todo apasi Just plug it in and use it as is. net> To: <TowerTalk@contesting. net> To: rfi@contesting. rohn pipe towers, raised on pressure treated supports, 4 raised radials, Comtek box. Even if you don’t use WriteLog, and you are interested in setting up for SO2R or improving your 1/2" 50 ohm hardline works pretty well if you can get any surplus cable from some cell phone base station installing company. Yes a lot of the stuff I had seen on the internet or various ham magazines but this is all that in one place plus insight on interference causes, etc. Qualification standings for K1TTT, United States - World Radiosport Team Championship 2022 I've been reading a bunch about band pass filters for my next multi-station portable contest operation and want to pose the question about the differences between these three companies who look to be the main builder and suppliers. K2TR Coax Stub Filters via K1TTT technical references site. DX Resources/Contest/Contest Stations; The title of the main category is Contest Stations and it deals mainly with Ham Radio Contest Stations. net> writes: > Gee, I'm not alone in receiving less-than-stellar performance from > stubs. tyyy on Instagram: "@wannafxx1a1ivx" Log in to see photos and videos from friends and discover other accounts you'll love. nb. K3NA Coaxial stubs via the K1TTT technical reference site. Distribution by Continent. Bands vs Continents. The resource has been on our site since Wednesday Apr 23 2008, and it has been viewed 684 times. What i have done until now is to follow the most of k2tr and k1ttt advices and make 2 stubs, 23 feet each. Compound Forms/Forme composte: Inglese: Italiano: spur track, spur, stub track n (rail transport) binario tronco, binario morto nm: stub axle n (automotive: axle for a steered wheel) (sterzo) fuso a snodo nm: stub nail n (short thick metal fastener) By Dave Pruett, K8CC. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Press Copyright Contact us Creators Advertise Hello, I am trying to make a set of stubs to be used on my SO2R station setup. stub is the characteristic impedance of the stubs, V. 1 stub 92' SHORTED nulls 80m, 40m, 20m, 15m, 10m For more detailed analysis of stubs and pairs of stubs see my other notes: Single Coax Stub Analysis I was curious if the performance of our 4O3A high-power Bandpass filters could be improved with additional coax stubs in parallel. 66 This pair of stubs works out to a 1/4 wave on 40m that is tapped at a point that results in a 1/2 shorted stub on 15m. Their parallel connection between the same two points will not affect their resonant frequency. pdf Ed Worst - K9EW. Two potential problems with that approach. Well lets talk about coax stubs. 1,796 likes · 4 talking about this. One important thing to remember with either the k2tr style stub filters or other bandpass filters is that they only stop the harmonics generated by the radio and/or amp. It looks like I need to heat up my Iron and build some high power filters as I cant afford the commercial ones! New maintenance blog off and running for 2017! Today was fun with Weller soldering irons and a mystery lockup with WARC bandpass filters from Array About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Press Copyright Contact us Creators Advertise The stubs are defined as follows: A = 1/4 wave shorted 80 meter B = 1/2 wave open 40 meter C = 1/4 wave shorted 40 meter (which is also 3/4 wave shorted 15 meter) F = 1/2 wave open 20 meter (which is also 1 wave open 10 meter) G = 1/4 wave shorted 20 meter J = 1/2 wave open 10 meter One or two stubs are selected with a band decoder and some Coax Stubs: Bob, AK6R, ha messo insieme un grafico molto utile per aiutarvi a costruire stub per l'installazione SO2R. com >[mailto:cq-contest-bounces@contesting. Follow edited Jan 20, 2022 at 22:19. This is about the cross country skiing opportunities at the The The storm cam is on! http://www. Download Info. It was inside an 80m 4-square and was bad. > > > David Robbins K1TTT > e-mail: mailto:k1ttt@arrl \ I did measure with the T in line and also the coax switches (I say switches as one is a coax switch, and one is Teed off to potentially just switch stubs) Tonight I took all that switching out of line and no change. nn5t, kh6bzf, k1ttt Thanks for sharing and maintaining a great Ham-Radio info source. Additional references: Non è possibile visualizzare una descrizione perché il sito non lo consente. 73 Tom W7WHY > Hello, > > I am trying to make a set of stubs to be used on my SO2R station setup. Some contesters want to implement it, while others want it delegated to its own category in contests. When cutting the coax stub you want to achieve a very high im For reference, I’m using Managing Interstation Interference 2nd edition by W2VJN as well as K1TTT’s online Technical Reference and his online copy of K2TR Coax Stub filters article. Nov 20, 2012 11:58:24 PM, sv1dpi@otenet. The K1TTT Superstation in Peru, Massachusetts, Peru, Massachusetts. There is information on coax stubs here: K1TTT Technical Reference I wrote the original article for ham radio interference protection. Ham Member Lookups: 480489 : Biography; Detail; Logbook; Log a NEW contact with : 6292629 Last modified: 2015-07-16 00:28:52, 0 bytes . stub is the velocity factor and alpha. 4,987 37 37 gold badges 37 37 silver badges 55 55 bronze badges. Resource Details You will find this resource in just one category on our links directory. dfa lizjhntk nat hofvv whobyup gbwfs meqcywt pzd pvkms rvhp