Line Isolator - Installing and Testing | Ham Radio

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watersstanton

watersstanton

Күн бұрын

Пікірлер: 66
@KG-xf9ew
@KG-xf9ew Жыл бұрын
Hello and 73s from Arizona, USA. Always fantastic content and very well done. My go to elmer!
@watersstanton
@watersstanton Жыл бұрын
Thank you very much! Nice to hear from you. 73 Peter.
@PopeBrak
@PopeBrak Жыл бұрын
Great video, Peter! I'm a new ham with a very modest yard and equally modest budget, and I really appreciate your tips on how to make the most out of available resources. Many thanks, and 73! KK7IRZ
@watersstanton
@watersstanton Жыл бұрын
Very welcome!
@PatFortino
@PatFortino Жыл бұрын
Thanks Peter. Thanks for showing how simple it is to test and to fix the problem.
@watersstanton
@watersstanton Жыл бұрын
Glad to help
@watersstanton
@watersstanton Жыл бұрын
Glad to help.
@tomnorman5461
@tomnorman5461 6 ай бұрын
I really appreciate your tips on how to make the most out of available resources.
@kc8wvg
@kc8wvg Жыл бұрын
Thanks again, Peter. A great and simple explanation.
@watersstanton
@watersstanton Жыл бұрын
Many thanks!
@Bobbr3
@Bobbr3 Жыл бұрын
Thanks for sharing this information. This demonstration is remarkable in its simplicity and very impactful in its depiction. Appreciated! 73 de KB3ZIM
@watersstanton
@watersstanton Жыл бұрын
Glad it was helpful!
@GordonHudson
@GordonHudson Жыл бұрын
I was able to find some quite chunky ferrite beads with an internal diameter that was a tight fit on RG58 coax. I put 12 of them on a length of coax with gaps in between to keep it flexible and put some adhesive heatshrink over it. Add PL25(s and I use it as a patch lead from my antenna switch to the radio. It really does work incredibly well.
@watersstanton
@watersstanton Жыл бұрын
Yes a popular alternative.
@petermainwaringsx
@petermainwaringsx Жыл бұрын
Flickering LED lighting strips and device inserted/removed sounds from my PC told me I had a common mode current issue. I used the same ferrite as you with six turns and eliminated it. Thanks for a useful video.
@watersstanton
@watersstanton Жыл бұрын
Glad to hear you solved the problem
@alanpfahler1707
@alanpfahler1707 3 ай бұрын
Very Interesting. Thank you for all the information you share with us. It's been very helpful!!
@lmantuano6986
@lmantuano6986 Жыл бұрын
g'day! I think it would have been nice to see what happens to those readings WITH an isolator in place.. OTOH I always enjoy your content for its information payload and value, thankyou! vk3ola
@Sean.murdoch
@Sean.murdoch 7 ай бұрын
, isolator on end of coax& 31mix ferrites on scu-17 usb lead. Now my computer is rf free yyaaaa. Thanks 👍
@winstonchurchill6506
@winstonchurchill6506 Жыл бұрын
Always used a handful ferrite clamp on's seem to help
@mewrongwayKOCXF
@mewrongwayKOCXF Жыл бұрын
Thank You Peter! Very interesting subject! 👍👍👍
@watersstanton
@watersstanton Жыл бұрын
Glad you enjoyed it
@robertcowie-h5q
@robertcowie-h5q 2 ай бұрын
Top Class Video Peter 👍 Scotland 73s.
@Sean.murdoch
@Sean.murdoch 7 ай бұрын
Hi Peter, I put up a 40m rotating dipole without rf choke or balun, and immediately I had rf in shack wipedout computer, installed a balun , helped a bit. But still rf, just watched your video about rf chokes. Great now I know I need one and ( WHY) . 👍, great informative videos. Been watching quite a few. Thanks sean GI7ULG. 73.
@watersstanton
@watersstanton 7 ай бұрын
You are very welcome
@macgyver5108
@macgyver5108 Жыл бұрын
5:31 that's just proof positive you are a very "well grounded individual"! 😁
@AlexeyDXman
@AlexeyDXman 10 ай бұрын
Thank you, very informative!
@watersstanton
@watersstanton 10 ай бұрын
You are welcome!
@hamradioattitude9712
@hamradioattitude9712 Жыл бұрын
tnks fer good info 73
@stirlingpark6145
@stirlingpark6145 Жыл бұрын
Thanks Peter. A quick question, does the choke affect the outbound RFas well?
@watersstanton
@watersstanton Жыл бұрын
No the outbound RF travels only on the inside of the coax.
@stirlingpark6145
@stirlingpark6145 Жыл бұрын
Thank you I wasn't sure if it affected other parts of the coax. It is a pity that common mode energy can't be re-injected into the outbound signal. @@watersstanton
@ianliston-smith7921
@ianliston-smith7921 4 ай бұрын
Very helpful. Thank you. If there are significant common-mode currents of the sheathing and the choke prevents them from getting into the shack, are those currents sent back to the antenna to aid the transmitted signal, or are they just absorbed by the ferrite?
@watersstanton
@watersstanton 4 ай бұрын
Some radiation and some absorbtion.
@Tommy_Boy.
@Tommy_Boy. Жыл бұрын
Very nice video Peter! 👍📻⚡Thanks! Tom - WA7FLY
@miranovak8098
@miranovak8098 10 ай бұрын
I have the coaxial and also the usb cable to the trx threaded through the FT240-43 toroidal core. Each over one core. I have 8 turns of 0.8mm copper wire on the core and a led diode connected to its ends. This diode lights up when RF is generated. So I have immediate detection. RF can reach the coaxial via the antenna switch, etc. Try it and see what kind of RF you have and on which frequency.
@watersstanton
@watersstanton 10 ай бұрын
Nice idea.
@TonyLing
@TonyLing Жыл бұрын
Thanks Peter, I never knew that
@watersstanton
@watersstanton Жыл бұрын
Thanks for watching.
@owen6760
@owen6760 Жыл бұрын
Fab video
@watersstanton
@watersstanton Жыл бұрын
Many thanks.
@wshanney
@wshanney Жыл бұрын
Great advice as usual...W6QR
@watersstanton
@watersstanton Жыл бұрын
Thanks for watching!
@spillo84top
@spillo84top Жыл бұрын
Nice test! Wich ferrite core did you suggest for a coax with 7mm of diameter? Thank you and 73 de IW0RZB
@watersstanton
@watersstanton Жыл бұрын
The first part of the code is diameter ie 240mm whilst the second part is the mix ie 43. So any diameter of 43 mix is fine.
@spillo84top
@spillo84top Жыл бұрын
@@watersstanton many thanks!
@Kinetic79
@Kinetic79 Жыл бұрын
He mentioned mix 31 in the video - generally more effective for lower frequencies (like 60, 80, 160). Mix 43 is also a good multi-purpose … but a bit less effective at the lower frequencies. Basically, you’d just need more turns for the same choking impedance at lower frequencies.
@philb5289
@philb5289 Жыл бұрын
Would it be OK to always have a line isolator connected and just leave it connected?
@watersstanton
@watersstanton Жыл бұрын
In a word, Yes.
@jmount1200
@jmount1200 Жыл бұрын
Why not put the line isolator closer to the balun?
@watersstanton
@watersstanton Жыл бұрын
No no no…. you will expose the res of the outer coax line to pickup as explained in the vifeo.
@m3snusteve
@m3snusteve Жыл бұрын
Would a 1:1 unun work?
@aarongriffin81
@aarongriffin81 Жыл бұрын
The line isolator is only to correct transmission SWR and a choke near the antenna is to prevent the coax from radiating as part of the antenna is completely separate? @@watersstanton
@_0815_
@_0815_ Жыл бұрын
​​@@m3snusteveyes A 1:1 unun is just another word for line isolator. Just like the W1JR balun... This is a line isolator in a housing with two SO239 plugs. What Peter showed is just the same without any housing and plugs.
@_0815_
@_0815_ Жыл бұрын
​​​@@aarongriffin81the balun in the middle of a dipole is to avoid common mode caused from the antenna itself. Both legs are subject to slightly different environmental conditions, this could create common mode current. The line isolator right in front/ after the TRX gets rid of any other common mode current occuring because of a mismatched antenna or QRM from any probable source that's on the outside of the shielding. It gets onto the shielding AFTER the balun in the middle. This could be radiation from the antenna if it's too close and parallel to the cable, any electronics nearby etc. It often happens with vertical middle fed dipoles, when the feedline is just dangling down, parallel to the lower element. You need to guide it away perpendicular to the elements as far as possible and choke it right before the TRX. I'm no native speaker so I hope you get what I tried to explain.
@libbyd1001
@libbyd1001 Жыл бұрын
Another field test I read about is to first just barely insert the center conductor into your radio, and listen for noise level. Next, insert fully so that outer ring makes contact as well and if noise increases, you would probably benefit from a choke on it. For anyone curious, I found that somewhere on the Palomar Engineering website. I've not tried it yet, but plan to when I have time.
@watersstanton
@watersstanton Жыл бұрын
Not sure that is valid test - try the same test with and without the choke.
@jacianmcgurk7424
@jacianmcgurk7424 Жыл бұрын
Sponsored by SHARPIE, giving you the ultimate edge. LOL
@Davidm-M0TPT
@Davidm-M0TPT Жыл бұрын
i certainly would not advise touching the PL259 while keying up. Please don't do this; fine if you are using an analyser but don't use your rig, not even at 5w Just saying, stay save
@watersstanton
@watersstanton Жыл бұрын
You are overstating the risk. The PL-259 outer is connected to the radio chassis, and there are many 5W HF handheld radios. So be careful but not to that extent!
@Davidm-M0TPT
@Davidm-M0TPT Жыл бұрын
@@watersstanton that maybe so, but a risk none the less and i would still suggest not to key up and place your hand anywhere near any patch cables or down the back of the rig. Invest in a analyser, would be perhaps a better suggestion.
@Dreamlgider
@Dreamlgider Жыл бұрын
add an isolator and try the test on 40 again!
@jacianmcgurk7424
@jacianmcgurk7424 Жыл бұрын
Getting an RF burn is part of your initiation, if your system is producing results like peter is showing then where did your knowledge go to, I mean you did pass a test.
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