Coax Cable, Balanced Line and Connectors
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- čas přidán 3. 07. 2024
- In this video, we discuss the basics of coax and ladder line (balanced feeder). We look at PL259, N-Type, SMA and BNC connectors.
• Choose the Wrong Coax ... Coax Loss Video - discussed in video
Also see this Podcast:
• Foundation Training Full Course Here - Věda a technologie
Got my foundation exam a week on Tuesday :). Nearly 47 so a late starter but at least I will be legal come the zombie apocalypse.
A friend of mine who's been in electronics and radio all his life is now looking to get his licence in his mid '70s.
@@paulsengupta971 Got mine at the ripe age....decided that since I was Over 60 and Overweight, it was time for my license.
Got my gen at 53
@@paulsengupta971oh that’s cool. I am engineer also and work with radios among other things too.
Good luck!
Hello Lord Callum: Thank you for this video as most of us have forgotten the characteristics of laderline cables. God Bless old friend, be safe & my best to Wendy + your dogs. TMP,Unit 22 from N.J.
You are very welcome - thanks
@@DXCommanderHQ Callum is not the Lord, the land lord is 🤣
Greets - taking notes / pondering how to propagate this very good stuff.
cheers / *_73!_*
--VE6IU
It was thanks to videos like this that you did 3 years ago (on your old CZcams channel) that inspired me into taking my foundation, intermediate and finally my full licence in April last year.
They were a great help to me and I'm sure they will continue to be for others.
Cheers, Ian - M1GSX👍
Fantastic Ian. Thanks for the encouragement!
Thanks Callum. I'm a big fan of 600ohm balanced feed.
Great content 😊
When I attended the US Navy Electronics Technician school the common story about BNC connectors was that it stood for "British Naval Connector" True or not it was a good story. You are the best!
Ex Brit Navy here, Its a bayonet connector so that is the B, as far as I remember the N is for Neil and unfortunately the grey matter that held the other name is either being uncooperative or AWOL.
It’s called the Bayonet Neill-Concelman after the two chaps who developed it in the 1940’s in the US so it’s odd it gets attributed to the UK.
Cal mate you videos helped me pass and my ambitions was to speak to you i bought the DX Commander Classic we have spoke spoke many a time but without your training im not bringing down Essex Ham which i was with i watched both and Passed thank you so much Cal now 2 years as a licenced operator and love it MM7DHE from AYR Scotland
Brilliant!
Keep up the videos for the new foundation licensees.
You got it!
Thank you for interesting video. The SMA connector with reversed inner parts (male with female center part etc) is called - surprise, surprise - reverse SMA.
Surprise!
You prompted me to look up the banana plug, the article I found appears to say that it was invented in 1924 and was known in German as ”Bananenstecker”. 100 years of the banana plug, sounds like an excuse to go out for a drink...
Maybe a drinking game. Watch a load of ham CZcams videos and take a drink any time someone says the word banana.
Bananenstecker! Well, what do you know!
@@DXCommanderHQ Does that mean if we watch M0MSN's videos we have to take 5 drinks when he rates one of his handmade antennas at 5 bananas?
good point you made about PL259 effectively just being a screened banana plug... but you can take this to the next stage when portable.. put a banana plug on the end of your 1/4 wave wire when HF portable & just plug it straight into the centre of the SO239 on the back of your rig. It fits!. (no co-ax at all). Do make sure the rig is properly earthed. OK only good for qrp & don't touch it whilst transmitting but who needs co-ax (basically you can run a 2M or 70cm handie with a quaterwave sticking straight our of the top of it & you can run any HF set the same way with the antenna directly connected to the back of the set without co-ax
I think knowing the ohm rating of canbles might be more critical for the Foundation in the UK over the Tech in the USA/CAN.
The Tech is band limited, with very narrow HF privileges. Mostly, 6M up.
50 ohm coax will work in mist caces.
In the UK, the three classes are divided generally by power limits. So a "Founder" might be more likely to go into HF.
Hence, one might be willing to use ladder line.
There is a guy in Houston who builds ladder line using spools of bare wire, craft sticks, and hot glue.
And you can use a coax-ladder line converter outside the QTH. Coax rig to the outside. Then 9:1 adapter to ladder. These can be bought off the net.
Now, you will need some sort of impedance matcher ("tuner") for this to work.
Yes, last line..
Thanks Callum
I must say Callum , i was a naughty CB user back in the later 70's (SS360 Sigma 4 BRL 200's ) and i was going to sit my Ham Back in the day BUT morse code scared the hell out of me due to my English being trash, but then found another life being young and punkish which diverted my attention , well after watching a few of your Videos and knowing how passionate you are still about the radio you have helped rekindle my passion for HAM , so much so i have my foundation Exam on Wednesday . Bought a Yaesu 710 to start but knowing me that will be the smallest radio i'll own lool .
I would just like to say thanks for your down to earth straight to the point no nonsense informative videos and i hope to catch you in a contact one day
Best of health to you
John
73's
PS they used to call me GPJ back in the day back i was always cutting up steel plate to make .....ground planes of all sorts ;-)
John..! That's GREAT news.. Enjoy and have some fun with your new found radio freedom!
@@DXCommanderHQ I certainly will, just passed today , teenage dream coming true , next stop Intermediate ;-)
73's
Electocraft uses BNC ports on their rigs. To me easier to get on/off the rig, and has the spring tension to keep the cable on the rig.
In the back of my TV in "the old days" was twin lead. If you've ever seen a TV with two screw terminals for an antenna connection, it's expecting 300 ohm twin lead.
Those SMA connectors caught me out, I couldn't work out why my WiFi had a range of 6 inches with the "better" antenna I had bought ...
Ladder line: I think the beginners need to know, they might come across the G5RV antenna and wonder what's going on. No need for massive detail, just an overview. The detail comes along as you progress, you learn more once you get a licence than you ever did in the classroom.
Callum sayd, he likes antennas... so he likes them, easy? YES!!!
Hi Callum, maybe you can do a video about antenna chokes? the mistakes about them and benefits?
PD5AB , Andre
Chokes coming NEXT (after Dummy Loads).
I'm sure all of you are correct but I'm sticking with my "British Naval Connector" because it sounds cooler!
It does!
might be a bit anorak but i always understood that with the plastic coated feeders the narrow stuff to be ribbon wire or what the american hams call window line the wider spaced to be slotted feeder and true ladder line is open wires with attached spacers each with their own optimum use and impedance but i suppose the lines HI have become blurred over time!
Open Wire feeder is NORMALLY (I think) that 6-inch home-brew stuff..
Hi callum which coax out of all the messi and paloni what you say is the best ?
Their most expensive! LOL
Dear Callum. Does lsdder line make sense on 2M
Best regards OZ1MR
Does it make sense? Well I suppose anything can make sense but coax is so much easier.
Well, if you look at a bananna plug from the side, it looks like the peals of the fruit trying to come off the body!
KF7SZT here. Leaving Mesa AZ for St. Johns Newfoundland this summer. I should attempt to communicate with you from the Marconi site. Mobile IC-706 with vertical antenna. Would you please advise me as to when you may be on the air as a normal schedule. I am an admirer of your web presence. Thank you for any information to help me.
7 3
Bill Cawthorne
Mesa AZ
Hiya Bill.. Best bet is to get notified via subscription and then clicking the bell - and testing out if you get an email to your account telling you I am about to go live. Failing that, almost every Friday from about 12:00 (London time).
@@DXCommanderHQ thank you.
@@DXCommanderHQ Friday July 5th.
Just as a matter of interest Callum and totally separate ...Have you never been in to CW, does it just not interest you?
It interests me. I never learned it.. But I have played with it.. It is a THIS YEAR thing!
🍌🤠🍻
since when do "The Band Police" watch YT, i would have thought they would be busy "educating" us mere mortals :) :)
They can both both!
There are male smas, female smas and transgender smas.
And now we know! Thanks :)