Is Your Coax Cable Stealing 40 to 50% of Your Power? Jim, W6LG Uses Bird Watt Meters, RigExpert AA35

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Jim W6LG

Jim W6LG

Күн бұрын

Пікірлер: 117
@Hidden_Destinations
@Hidden_Destinations Жыл бұрын
01:23 If you output 100w and loose 3dB in the coax, that is 50W at the antenna. Most people don’t know that is ONLY a minuscule 0.5 S-Unit lower at the receiving station. Same with a small mismatch, don’t get hung up on it and focus on a good antenna!
@ham-radio
@ham-radio Жыл бұрын
May I politely disagree? I do not want to give up 3dB ever, anywhere. I am a lifelong DXer and it is hard to replace that lost 3dB. Additionally, it makes the SWR look better than it is. Additionally, put your money into the antenna system including coax, switches, etc. I can hear and so can you, a 3dB reduction in signal strength. It makes no sense to me to invest in an antenna that has 3dB gain and then lose all of that in coax losses. Good coax is key to a good signal. That's my view from Rocklin, CA. Thanks, Jim w6lg
@Trinitystillmyname
@Trinitystillmyname Жыл бұрын
Jim, please keep up the quality videos. Theory over product endorsement, always is refreshing. You sir are a gentleman and a scholar.
@lyfandeth
@lyfandeth Жыл бұрын
I think Rigexpert sets the gold standard. The same Bird wattmeters are still pursued and praised.
@G0USL
@G0USL Жыл бұрын
Rigexpert are used by industry professionals.
@larrykeyes4979
@larrykeyes4979 Жыл бұрын
Jim, it's painful to hear about what you are going through, but thank you for sharing everything. We should not shy away from pain, especially to share it with another. As I wrote in one of my infamous cat essays, "Pain is a marker of life, not death." Of course that's easy to say when you are not experiencing it. I just wanted to share with you in return man. I'm just one little fan out here in the ether, but know that one anonymous schmuck is listening. You are not alone. In the same essay I recalled what a old trail cowboy told me at around 5 years old. He was waiting for a demonstration ride at our little small town rodeo circa 1958, when the circuit was still active. He was "too broken up to do anything competitive" anymore, and too far down the road to be on the trail. He gave me some gems that day, saying the movies had it all wrong about "us cowboys". He told me that generally trail hands did not get "drunked up and shoot things", but were comtemplative men, often reading and sometimes writing prose and poetry and music. 'Fuzzy' Carlisle told me he got the nickname due to keeping his head shaved. And he described how age and hard knocks had brought him to the rodeo circuit out West to make a few bucks doing demo rides and roping. When I asked him if it was hard to endure all that had happened to him, he just quipped "We cowboys have a sayin' - If'n I can feed pain then I ain't dead yet." At 5 I had no clue, but it sounded important so I stuck that thought away in the recesses of my brain for later use - as I did with every word that fell from his lips that cool sunny day in Yuma, Arizona. As he hobbled away to his ride Fuzzy turned his whole upper body - neck being stiff and beat up - and out of the corner of his smiling mouth came this salutation, "Happy trails, cowboy." I was near to crying and did not know why. Man I don't want to minimize ANY of what is happening to you, but I felt the need to holler at you - just in case it gives you even the thought of something beyond your space right now. You are a kind and intelligent man, not unlike Fuzzy Carlisle. He came to mind when hearing from you about chemo and all. And you share your knowledge like no other here. You give us gems like a old cowbow - with grace and no BS. They ain't no better way Jim. You have made a difference in the world.
@AlvinMcManus
@AlvinMcManus Жыл бұрын
Pain reminds me that I am alive.
@AB1Vampire
@AB1Vampire Жыл бұрын
Thank you for sharing the results of your RigExpert. I rebuilt my station over the past few years and my feedline( >100' RG8) is the last of the old stuff. I've been procrastinating, rooftop trips more difficult every passing year.
@ronchampagneve7bfm906
@ronchampagneve7bfm906 Жыл бұрын
Another great video Jim! I have watched all your resent videos (past two years) and used your suggestions wherever I could. Can't wait for the one on chargers, wall worts and unnecessary shack noise!! Thanks for all you do for us!! Ron VE7BFM
@che59v
@che59v Жыл бұрын
Thank you for taking the time to make this video, as always lots of good info. Have a great 2023
@arconeagain
@arconeagain Жыл бұрын
I must say, this is a beautifully streamlined demonstration and presentation. It's quick to the point, and crosses over the the theoretic, and practical measured with two levels of equipment and technical instruments. I have so much to say on this subject, but I'll leave it to these further comments. The online loss calculator really opened my eyes, even more so when it comes to ERP. You mentioned Heliax as basically being close to lossless, and when you have an antenna with, say, 9DbD of gain, the benefits of running such a coaxial cable really does come into the picture. You've invested so much of your hard earned money and effort, so why skimp on the coax? You're simply strangling the system, and at the end of the day, it's just false economy... which makes no sense. Brilliant, concise stuff. Proof!
@kingduckford
@kingduckford Жыл бұрын
50 foot LMR 600 for VHF/UHF, 50 foot LMR 400 for my CB and 10M antennas, and 75 feet of 8u to my all band HF vertical. All four main feedlines are barely long enough to reach the radios, fixed by attaching Palomar "pipe bomb" chokes at the terminating end in the shack, letting a few short LMR 400 jumpers finish the jump. And certainly, I do enjoy good power out, and high reception in. 50 foot and 100 foot rolls of premade 8x are now kept for experiments and when I hook up 80 meter short hanging wire. I've heard a few people talk about their poorer setups. "Its just 3db". Astounded that people think that the loss of that much transmit/receive is just nothing. Yet, you hear it all the time. Hope you are doing well through your medical troubles.
@radiotests
@radiotests Жыл бұрын
Correct, 3db of received signal is, well no signal to DX back to. It's amazing people with FCC licenses don't consider that.
@chichimus
@chichimus Жыл бұрын
So if you are worried about ice build up on your line, RG8x is the way to go :) Thanks for the video Jim, always learn something. I have an older model AA-50 and agree that RigExpert is a good company with good products. BTW Good luck on your treatment. I'm on cancer #2 and it was surgery this time. Went better than I thought and it looks like they got it all but I'll find out for sure in a week or two. Shuffling around the house but have a perfect excuse to binge watch videos :)
@mikeramsey9747
@mikeramsey9747 Жыл бұрын
Jim, this is the first video by you that I have caught, I have to admit that I was shocked to learn how much loss that I'm getting with my RG8X, so I guess I'm going to be raiding my coin jar to purchase some RG213 or LMR 400. You explained the differences so I easily understood what you were teaching us so thank you.
@kenluning909
@kenluning909 Жыл бұрын
Thanks for the great video on coax and loss. I work the world on 100 watts and LMR400 size coax. I would use larger but I don't have a true dedicated place in my house yet. One day. LOL
@thomasperina2990
@thomasperina2990 Жыл бұрын
HAPPY NEW YEAR ALL: JIM I loved your video & I must say well said. Many people just don't get it when it comes to coax cable. Unfortunately it all comes down to money in the end. Many people are always looking for a so-called deal especially at swap meets. Please take care of your health sir we need you desperately, TMP from N.J.
@patrickbuick5459
@patrickbuick5459 Жыл бұрын
I agree totally. I know I have a nice shiny new rig on my wish list, but really, the biggest improvement(s) to my shack have been a much better antenna and better coax for about a 175 foot run to get the antenna away from the apartment building noise. Between those two improvements, I have spent (or soon will for the coax) almost as much as the rig would have cost! The return on investment in communications terms is much higher. Not as much in bells and whistles, but what are those without the contacts? Oh, and I am not a contester yet, though some club guys are big into it and keep trying to draw me in.
@thomasperina2990
@thomasperina2990 Жыл бұрын
@@patrickbuick5459 Thank you sir for sharing your point of view. When I first started in cb, ham, etc there was only RG 58 u & RG 8 coax cable. Then during the CB frenzy RG 8 X came to market. Back in those days there were no antenna analyzers or data sheets showing coax cable data so basically we were all on our own. There is so much crappie coax out there cause people don't read, amazing, TMP from N.J.
@bill-2018
@bill-2018 Жыл бұрын
@@patrickbuick5459 That's a long run of coax! Surely even good coax would be lossy at that length. Could you use ladder line? It can be a problem getting it out of a building though. G4GHB.
@patrickbuick5459
@patrickbuick5459 Жыл бұрын
@Bill Kitchen Even the best regular coax I am looking at is 3.6dB at 200 feet for 440MHz, not much in the HF bands though, Even 2m is 2.2dB, 1.2@ 6m. However, between a slightly longer piece of coax, connectors etc to make the jumpers for after the remote switch, I am looking at the $1300 CDN range. Almost a brand new rig at that price. Window line or ladder line is pretty much out of the question unless I put wooden stakes in all the way out, since there is not much except the cable TV / Internet coax on the apartment building or metal fencing to tie to on the way out.
@warrenbaker4171
@warrenbaker4171 Жыл бұрын
Thanks, Jim. I so appreciate you and your videos.
@zing913945
@zing913945 Жыл бұрын
Hi Jim, This really makes good sense. I'll have to control my frugal nature when it comes to coax. I never want to experience what happened to your equipment in the Hole in one video. Your videos that really took me to school are your db loss from connectors as I really thought there would be significant loss and your grounding / bonding videos. Thanks again All the best to you !
@lyfandeth
@lyfandeth Жыл бұрын
The kind of simple, bite sized, hands on teaching that so many new--and old--hams need.
@ham-radio
@ham-radio Жыл бұрын
I was happy to read that. in fact, I read it to my XYL! Thanks, Jim
@timgoad5750
@timgoad5750 Жыл бұрын
Another well done video. Many people don’t realize this.
@richarde735
@richarde735 Жыл бұрын
11 MAR 2023 - I’ve been in contact with Jim. he is currently in the ICU at a California Hospital battling an infection. Jim says hi and he is looking forward to getting back to the Shack and on KZbin again soon! Please keep Jim W6LG in your prayers!
@bill-2018
@bill-2018 Жыл бұрын
Thanks for this. I've thought for years I could do with checking my losses and your video reminded me. I have an inverted vee with about 40' RG58U for 60m and attic dipoles for 20m, 17m and 15m with about 20' of RG8U. As I run QRP at 5 Watts or less I don't want to lose R.F. in my cable. Everything here is BNC connectors. I'll be using a 50Ω dummy load and oscilloscope, good to 25 MHz. H.F. is very forgiving and a little R.F. goes a long way. A Pixie at 350 mW out on 5.262 MHz got me an SWL report from 220 miles away when I had a QSO at 180 miles so I wonder how much I might have been putting out. G4GHB.
@ham-radio
@ham-radio Жыл бұрын
I don't know. QRP is a real challenge for both sides of the QSO. I am amazed at what some of my friends have done on CW with QRP. It takes skill to set it up and to make it all work. Sounds like you are having fun. I have always been more of a QRO kind of guy except when trying digital. I did make contact with digital using an incandenscent light bulb a few years ago. 73, Jim
@DonDegidio
@DonDegidio Жыл бұрын
Hi Jim, Excellent visuals during the test. I've changed over to Messi & Paoloni Hyperflex 10 that goes out to the Ameritron switcher and then up the tower to the antennas. I estimate between 100 and 125 feet for the total runs. In the shack, I've changed over to RG400 for patch cables. With it's Teflon insulator, makes soldering connectors no problem as the melting point of the Teflon is higher than the solder. When I get into satellite work, will switch over to Messi & Paoloni Hyperflex 15. As you showed, the higher the frequency the higher the loss. You and your family stay safe. 73 WJ3U
@patrickbuick5459
@patrickbuick5459 Жыл бұрын
I have a 175 foot run or so. I *was* on RG8X and people were umm commenting on it. So I found the RG213 that I had around in pieces from a swap meet and put connectors on. Unfortunately, I got water ingress in the middle chunk, so that section went back to 8X. I have an order ready to go at Messi & Paolini for ONE piece of their cable that measures better than LMR400 without going really big, like hardline. I dual purpose the line, so some loss in the duplexers to push / pull 2m & 70cm using the same coax as HF as well as DC control of the remote coax switch. I agree. These antennas receive really small signals and can't afford to lose bits and pieces all over the place. That and my power output.
@patrickbuick5459
@patrickbuick5459 Жыл бұрын
I just looked at losses for RG213 for 70cm for that distance and figured out why it and 2m seems "distant". (I didnt dare look at 8X!) Less than ¼ of the signal at that distance. Then I priced the top M&P cable for the length I need and went jaw agape. I know that losses hide SWR, so now I want to measure *at* the antenna to see how it *really* measures for 2m and 70cm. I may wait for spring though, so I don't have to unwrap and re wrap the connectors with self amalgamating tape.
@haraldlonn898
@haraldlonn898 Жыл бұрын
Hi. Thank you for the report. I still wonder why: all old and many new rigs still has the SO239 that is cheap and not so god conecting bigger cable to. Is it time to demand better conectors on our rigs so we can use the right good cable without loss. Thanks.
@ham-radio
@ham-radio Жыл бұрын
Yes, some are just crap with really bad tolerances. The manufacturers often use junk connectors on expensive devices. We know it when we go to connect the coax. There are, for real, some connectors made in China that are as good as it gets. 73, Jim
@stevegriffin9552
@stevegriffin9552 Жыл бұрын
Good evening Jim enjoyed your video. Looking forward for the power supply test. I think that will be interesting. And happy new year to you and your family. WD5ENH Steve
@timbacchus
@timbacchus Жыл бұрын
Hope you are feeling well today. I have always used RG-8 since the 60s only use 50 feet and only on 20 and below. I feel that I am getting enough to the antenna. I have tested by putting a watt meter between coax and the antenna and a jumper to the antenna from the watt meter. At the same time a watt meter at the transmitter. Have a great 2023 de WB7ORB.
@G0USL
@G0USL Жыл бұрын
It always amazes me that some Radio Amateurs spend several thousand in the shack, Then go cheap on the weak link, the feeders? I only use double screened coax for, as you mentioned noise reduction. It's a simple fact that reducing your noise by, for example, 3dB doubles the performance of the entire system. PLUS it greatly reduces induced RF into any other cables when transmitting. Great video 73 de GØUSL
@CriticalThinker-42
@CriticalThinker-42 6 ай бұрын
Well Said, Jim! Better coax is always a good investment. Get the best coax you can afford. Its an integral part of your antenna system. Another advantage is, in my experience, better coax will also last longer before needing replaced. I'm retired from the communications electronics field, and I've had to replace a lot of cheap coax over the years. 73 -mike
@SoulStarLA
@SoulStarLA Жыл бұрын
Hi Jim, you look much healthier. Hope you’re doing well & have a wonderful New Year!
@c.a.r.s.carsandrelevantspecs
@c.a.r.s.carsandrelevantspecs Жыл бұрын
Excellent video--so important for getting your signal out and efficiently using your RF output. Thanks so much! ~ 73 ~ AC7WH
@ynot6473
@ynot6473 Жыл бұрын
i have RG 8x to my 40 meter end fed, but it's only 6 meters long. with the lower frequency and such a short feeder i'm not going to worry about the loss on that one. i intend to put up a vertical half wave for 20 meters, but it will need maybe 15 meters of co-ax. i won't worry about that one, but if i add 17 and 15 meter bands i may have to think about RG 213 or LMR 400.
@ham-radio
@ham-radio Жыл бұрын
Ya, all of that sounds good and you demonstrate a good knowledge of what to use and where. And, that is what many need to learn from guys like you. So help a neighbor who is new when you can . Thanks, Jim
@VE6LK
@VE6LK Жыл бұрын
Great video Jim - explains it concisely and with a great demo. Thanks!
@R50_J0
@R50_J0 Жыл бұрын
You recommend 400MAX as equivalent to Times Microwave LMR400 for general ham use?
@richardchandler9027
@richardchandler9027 Жыл бұрын
You are the best. No bird meters here, but I do have a AA-600. So if I take my 1500w dummy load to the end of the run and then do an all parameters test, the RL/SWR reading tell me exactly what is being lost in the coax? I though you had show earlier that lossy coax had a lower artificial loss number. I hope you have time to help me understand.
@radiotests
@radiotests Жыл бұрын
There are only two things with perfect SWR. A dummy load and an antenna in modeling software. We measure the conjugate loss of feed line and antenna. Obtaining perfect SWR as a measure of performance indicates ignorance of the science of EMF from a source to load. In the real world as long as the feed from source is tuned for reflectance that energy will recombine with the to forward wave. It's a few small compromises at both ends to maximize transmission and lower loss. If it were not true every percent of return energy would reabsorb into the source, your radio or amp would likely fail in minutes. It's why the tuner has been around since the birth of modern radio. Somehow over the decades the idea that SWR and load impedance are the only measure of a good system has been wrongly conveyed. It's a myth. If it were true multiband antennas wouldn't work and dozens of other effective radio devices would be ineffective. I'll use my old Antenna book and the Handbook of the ARRL as my source instead of engineering books with equations for physics. If you get those and read them you won't be bombarded with mythical information from I'll informed "experts".
@mattt3284
@mattt3284 Жыл бұрын
These are longer base station runs. I'd be curious as to 18' mobile application comparison between RG8x, RG58 or 59 and LMR 240.
@clems6989
@clems6989 Жыл бұрын
Would love to see a video on the noise generated by SMPS's around the house.. Thanks again jim..
@davidw460
@davidw460 Жыл бұрын
Great job, thanks for making the video :)
@R50_J0
@R50_J0 Жыл бұрын
I have the RigExpert AA-50. A fine instrument at a good price.
@markruby2434
@markruby2434 Жыл бұрын
Jim, This discussion is helpful for explaining coax losses . I am curious for your input on using ladder line vs coax. I have several friends that use ladder line and always mention the great efficiency. I am interested not only in efficiency comparison but also physical advantages or disadvantages and any other considerations of ladder line vs coax. Mark W3BAT
@ham-radio
@ham-radio Жыл бұрын
Window and ladder lines are excellent. I use them where I can. As a teenager I make a long length and ran it up a hillside to a beam located about 150 feet from my bedroom. That took all summer and I learned a lot. 73, Jim
@glennstevenson6242
@glennstevenson6242 Жыл бұрын
Good on ya mate. You're looking well. Regards from VK.
@JayN4GO
@JayN4GO Жыл бұрын
Damn that’s a lot of loss for 8x. I have one line of that going to an end fed. Everything else is lmr. Time to make the 8x a ground radial or something. Jim I forgot what beams you had at the previous qth. Looking for ideas on monobanders or better tribanders without traps. Tnx om es 73
@ralphmowery2898
@ralphmowery2898 10 ай бұрын
I may have missed it, but did you use a 50 ohm dummy load for the measurements or just the light bulb ? Light bulbs can change impedance greatly as they heat up. I did not see you look at the reflected power and that could throw things of
@78trav
@78trav Жыл бұрын
I'll start by saying I'm not a fan on switching cameras. In particular the one where you tried showing the Rig Expert. For short jumpers, I've become a huge fan of RG-316 or RG-142. The Teflon dielectric is almost impossible to melt. Happy New year! W8BT
@ham-radio
@ham-radio Жыл бұрын
Thanks. I always make some mistakes and something goes wrong in every video. I use Heliax that is almost 1 inch, 400Max and that large diameter RG216(or mabe RG218) and open wire feeders where I can. Thanks for the comment. I am just an old guy learning how to make videso still after more than 200. Thanks, Jim
@radiotests
@radiotests Жыл бұрын
That's brilliant, so the loss of EMF to heating your backyard won't melt the cable. I'm going to throw away my LMR600 right now and switch to cable used for the internals of a radio or amplifier. 😆
@thomaspressy3410
@thomaspressy3410 Жыл бұрын
hey jim thank you for another great video i have a unrelated question for you about your antenna system that you use at hom...how do you phase 2 yagi antenna,s together i heard you comment on this before but you never have really said how you do it can you make a short video about it ....i have a inverted v dipole thats at 52 feet at the peak of the antenna been thinking of buying a couple yagi,s and see what happens ...thanks jim 73
@Barracuda48082
@Barracuda48082 Жыл бұрын
Good to see you made it through the last few years and have moved from the mountain homestead. 73 kb8qlz
@daveengstrom9250
@daveengstrom9250 Ай бұрын
This is some good stuff. What type of coax would you recommend for short jumpers between transmitter and meters and the like. 2-5 feet maybe for UHF frequencies? Can't be too stiff I would think.
@muskateer10
@muskateer10 3 күн бұрын
Jim, You stated that the efficiency on RigExpert was about 64% "I believe. Where do you read that, are you looking at the phase measurement? I just picked up a RigExpert so I am trying to learn it. Thanks.
@richardcallihan9746
@richardcallihan9746 Жыл бұрын
Jim, would you like to way in on solid vs: stranded center conductor? Alpha LMR-400 type. (JSC wire and cable #3815 High Flex) I have it already, just wanted your take on stranded
@jameski5oeb668
@jameski5oeb668 Жыл бұрын
your videos are great! audio is one sided?
@wa6gxq
@wa6gxq Жыл бұрын
Thanks Jim, I am running belden rg8x....YIKES!!!
@mnb5404
@mnb5404 Жыл бұрын
I have 100’ of LMR-400 from the antenna (Butternut HF9V) to my radio. I have a question: should my tuner be local to the antenna feed or close to the radio like I now have. It seems I am getting a bit of loss according to my swr meter….
@tallyjbud
@tallyjbud Жыл бұрын
Right after I ordered 50ft of rg8x yesterday!
@forgetyourlife
@forgetyourlife Жыл бұрын
you will be fine.
@xjohn1970
@xjohn1970 Жыл бұрын
@Jim W6LG Hi Jim, what was the Length of the Coax you did your readings on?
@ham-radio
@ham-radio Жыл бұрын
100 feet was the length Jay. 73, Jim
@daveh9907
@daveh9907 Жыл бұрын
Dang, I just bought some RG8X...How are you putting pl259 connectors on that size coax...?....welder 8-)
@yupnope4941
@yupnope4941 Жыл бұрын
So RG8u would be better for longer runs? Thanks!
@alanjames4526
@alanjames4526 Жыл бұрын
Great video, Jim. 73 Alan KZ6B
@jrjr1273
@jrjr1273 Жыл бұрын
Very interesting. Thank You 73
@g0fvt
@g0fvt Жыл бұрын
Happy New Year Jim. Unfortunately many types of inferior coaxial cable are on the market and you cannot always believe what is embossed on the sheath. I have certainly seen cheaper cable with just a wisp of braid, unsurprising really with the price of copper. It is definitely a case of "caveat emptor", would you buy a cheap parachute from someone on Ebay with a strange name?
@lizzyfan1986
@lizzyfan1986 Жыл бұрын
Jim, do you operate any CW?
@bill-2018
@bill-2018 Жыл бұрын
Also check the braid as cheap coax can have very wide spaced braid as I found out once after buying some at a radio rally. I was disappointed and certainly won't use it for v.h.f. even for a short run. I want to see the braid now if I buy coax. G4GHB.
@ham-radio
@ham-radio Жыл бұрын
You bet! What is the percentage of coverage? And, is that an exaggeration by the seller? Thanks and 73, Jim
@SMShannon55
@SMShannon55 Жыл бұрын
First, I sincerely hope you’re improving health wise every day. I enjoy learning from you. Second, when you are able to resume these videos, please ensure the audio level is higher. This was difficult to hear. 73 de AI7KS!
@Brenda-jf2pe
@Brenda-jf2pe 8 ай бұрын
Wish I could afford a rig expert, it is twice what I payed for my 1979 TS-520s
@Brenda-jf2pe
@Brenda-jf2pe 8 ай бұрын
Times micro wave 240 uf , very high quality double insulated rg 8x type cable. Center conductor shielding polyurethane. According to spec. sheet .3db @ 30 MHz/ 100 feet!!!! KJ7TBR chow
@solarnewbee7868
@solarnewbee7868 Жыл бұрын
when u test the coax is the antenna attached
@Pedro8k
@Pedro8k Жыл бұрын
Check your coax for damage or water i dont use the thinner coax as it is easy to damage i have been using rg213 and it is reasonbly cheap strong and has a good low loss
@amateurshooter6054
@amateurshooter6054 Жыл бұрын
Thanks Jim
@stevesedio1656
@stevesedio1656 Жыл бұрын
Why doesn't anyone make a linear with a receiver gain block that is mounted at the antenna terminals? That gives you the maximum legal power at the antenna, and enough RF gain on the receiver to minimize the impact of house generated interference.
@franciscolopez3229
@franciscolopez3229 Жыл бұрын
This is another addition to my book of knowledge sir and you ate a 100% correct, a good station always boils down to the antenna system, either your running a good conditioned 40 year old rig or a modern expensive one. By the way sir, I'm just new to HAM, are you at liberty to share your email address? Thank you and all the best sir.
@petermajor4599
@petermajor4599 Жыл бұрын
Yessssss. 💪
@kf5hcr176
@kf5hcr176 Жыл бұрын
Well done Sir. 73
@lyfandeth
@lyfandeth Жыл бұрын
A decibel here, a decibel there, sooner or later it all adds up.
@ham-radio
@ham-radio Жыл бұрын
What U. S. Senator said about the same thing many years ago? Something like a billion here and a billion there. Was it Dirkson? My memory fails me..again. Thanks, that sums up the video. 73, Jim
@xprcloud
@xprcloud Жыл бұрын
Ladder line trumps almost any coax, especially when cost is a factor.
@patrickbuick5459
@patrickbuick5459 Жыл бұрын
True, but I don't think it performs well when I have to run 125 feet of it across the ground to get to my antennas.
@xprcloud
@xprcloud Жыл бұрын
@@forgetyourlife most installations for HF can install ladder line instead of coax for better results, so this is bang on topic.
@richardchandler9027
@richardchandler9027 Жыл бұрын
@@forgetyourlifeNo the point is transmission line loss. But not everyone can run ladder line.
@xprcloud
@xprcloud Жыл бұрын
@@forgetyourlife coax is not a religion, and you seem very “square” and not flexible, this is not how science works, go get yourself 450Ohm ladder 🪜, with a bulun
@Frankh77
@Frankh77 Жыл бұрын
Remote transceiver at the base of the antenna, or 1-5/8" hardline. Or, for us peasants, use Rg8/213 (maybe LMR 400/600 if you have more coin) and hope runs are shorter.
@AliReza-zx8km
@AliReza-zx8km Жыл бұрын
Nice........ 💝
@alsanderson4917
@alsanderson4917 Жыл бұрын
People pay big bucks for their radios and antennas... Then buy some cheap coax??? I use 1/2 inch HELIAX!
@ham-radio
@ham-radio Жыл бұрын
Yes sir! I got some large Heliax for some antennas here and it is really excellent cable. Thanks for the comment. 73, Jim
@r.b.8635
@r.b.8635 Жыл бұрын
Tnx Jim, I still learn from each of your videos, see you on LP, 73 de ZS1EKK
@Yellwolf
@Yellwolf Жыл бұрын
N connectors Never 259s
@Brenda-jf2pe
@Brenda-jf2pe 8 ай бұрын
Correction polyethylene
@bassangler73
@bassangler73 Жыл бұрын
I look at it like building a hot rod engine and running too small of a fuel line to the engine..
@paulyosef7550
@paulyosef7550 Жыл бұрын
ok
@scottdean1290
@scottdean1290 Жыл бұрын
Well dud, A major spec of cables is the loss per meter at various frequencies read and learn them! Also not mentioned is the connector loss add about 0.5db per connector. What you also have to think about is to NEVER use only watts as a measure of loss always use decibels which is the ratio of input to out put. By doing this you can understand that the transmitter power is affected yes but also the receiver signal is impacted. As a point of note commercial systems can accept up to 6db (or more) by compensating for the "loss" in planning
@ham-radio
@ham-radio Жыл бұрын
Hi Scott, Thanks. A few years ago I connected a bunch of right angle, double female, double male connectors in a long string that was maybe 4 feet long. Some were N, some were UHF, some were BNC and some just junk. There was NOT a half a dB loss in all of them combined. At HF, there is not .5dB loss per connector. That is an old tail that I have disproved many times. Loss is loss. In other words, as I said, loss on transmit and loss on receive are the same. If it easier for folks to understand a percentage like 50% versus 3dB or the 6dB is 4 times or 1/4 or 25%, then my video is better understood. The goal is to teach something in a friendly way and not be confrontational. Which is why I did the Bird Watt Meters, the online calculator and the reliable/accurate RigExpert. I chose 10 meters/28mHz for the obvious reason. I can't give up 6dB or compensate for it. As you know, that is 4 times. On receive, to lose 6dB, it would be a loss I could not tolerate. Keep in mind I was only talking about HF. Thanks for your input as usual Scott. Nice to hear from you. 73, Jim W6LG
@gabrielsansar6187
@gabrielsansar6187 Жыл бұрын
I think you need to go back to school snotty mean..... the loss is no where near your claimed fact... I look forward to watching `your` expert video series... when`s that out sonny ?
@McPilot_W3DDS
@McPilot_W3DDS Жыл бұрын
did you mean "dud" or "dude"? I think you need to clarify
@michael-------7058
@michael-------7058 Жыл бұрын
"Sad Ham" certified comment
@steinshaw2490
@steinshaw2490 Жыл бұрын
Scott, are you serious? Typo perhapes... Dude perhaps? That's it... a typo. If that is not a typo I like to think you are just a snot nosed kid that needs to get out of their triaining diapers of reading specs and get some real world experince... but I like to think it was just a typo. Happy Planning Scott...
@ralphbailey736
@ralphbailey736 Жыл бұрын
Thanks for the video great test. N7ZXG
@joeblow8593
@joeblow8593 Жыл бұрын
Thanks Jim
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