Ham Goodies Choke Isolator! Does it work? Did I have Common Mode Current? CMC Let's find out! EFHW

Рет қаралды 4,161

Күн бұрын

Hi Everyone!
This is my look at the Ham Goodies Choke Isolator!
Did I have CMC? We will find out!
you can purchase the choke here.
www.hamgoodies.co.uk/choke-ba...
The article in the video can be found here..
www.karinya.net/g3txq/chokes/
There is also a quick test you can check to determine CMC, HUGE thank you to Mark G0TOV for bringing this to my attention..
palomar-engineers.com/wp-cont...
Check out my EFHW antenna
• UK Antennas Review and...
Check out my website here.
m6ceb.com
Thanks for watching :)
73
Matt
2E0FNM

Пікірлер: 32

@brian.7966 9 ай бұрын

thats what I like about you your moving forward and willing to learn unlike some. great stuff well done.

@cmdrstriker4730 3 жыл бұрын

Very interesting experiment Matt, keep these type of videos coming. I've really enjoyed watching your progress with these great antennas :0)

@m6ceb 3 жыл бұрын

Thanks a lot mate 🙏 was a great lieelt experiment and needed the choke after all 👍thanks for watching 👍

@Jonshome337 3 жыл бұрын

Well done Matt another great Vid. I bought one of these (not this make) back in 2013 still going strong !

@m6ceb 3 жыл бұрын

Thanks a lot Jon! Very much appreciated and thanks for watching 👍

@andyM7XTT 3 жыл бұрын

Nice .glad you got it all sorted 👍

@m6ceb 3 жыл бұрын

Thanks a lot Andy much appreciated and thanks for watching 👍

@73dem6vmo7 3 жыл бұрын

Thank you again for this one. 73 de M6VMO.

@m6ceb 3 жыл бұрын

Thanks for watching buddy 👍

@johnk8091 3 жыл бұрын

Thanks Matt, interesting. I bought one of those MFJ current meters like you have about a year ago. I still haven't used it to test for CMC on my EFHW, its still sitting in its box unused. I don't have any common modes that I'm aware of. I installed a very efficient choke made by Balun Designs near my radio end of the coax. But your video has given me some interest in checking out how efficient my choke is - thanks

@m6ceb 3 жыл бұрын

No Problem John! It is a fantastic piece of test eqipment and it really helped me to see what's really going on :) Thanks for watching and enjoy the MFJ and EFHW ;)

@markg6jvy135 3 жыл бұрын

Nice video and a good result for you Matt 👍👏👏

@m6ceb 3 жыл бұрын

Thanks very much Mark 😜😍

@G0ogs Жыл бұрын

But how did it effect the overall matching of the antennas when measured at the radio ?. As the coax braid forms part of the antenna it would have some effect on the matching but I do agree it’s best to have the rf choke outside preferably before it enters the house and grounded at that point .

@70looney Жыл бұрын

hi matt does it matter were you put it just after atu inside or couple of feet base of the antenna outside thanks

@Sidmi5utc 2 жыл бұрын

Well done Matt you got a good choke and hopefully that will help you with your end fed antenna. 73 Syd

@m6ceb 2 жыл бұрын

Thanks a lot Syd :) Really appreciate all your comments bud :)

@matknight 2 жыл бұрын

Interesting. Just ordered one from Ham Goodies, i saw Tim G5tm using one and now you with the same results.

@K1QS_Radio 2 жыл бұрын

we need a Ham Goodies here in the states! Nice demo, 73. K1QS.

@davearthur427 3 жыл бұрын

As far as I am aware the choke should be as close to the antenna feed-point as possible which makes sense, otherwise the coax between the choke and antenna feed-point will have that CMC radiating off the braid and causing potential RFI problems.

@m6ceb 3 жыл бұрын

Hi Dave, I heard somewhere that the lenth of Coax before the choke can also affect SWR & CMC and 2.5m was a good dist to go for, I also wanted to get the coax to ground before choking it, thanks for watching 73 :)

@Sidmi5utc 2 жыл бұрын

Yes Dave for an HF vertical with ground radials but NOT for an end fed. The end fed design needs some coax to drive against as it acts as a counterpoise. Putting the choke where the coax enters the building is a good recommendation.

@marcoplacidi9975 3 жыл бұрын

They pretty good... I'm using for my g5rv no more rf returning in 40mt...

@m6ceb 3 жыл бұрын

Yes I'm very impressed! Didn't know if I had CMC but turns out I did! I don't anymore 😄 thanks for watching 👍

@rallypoint1 2 жыл бұрын

Cool!! Did you open it up and see what toriods and wire they used?? For shots and giggles!!

@m6ceb 2 жыл бұрын

I did open it up after water got in. No rubber gasket used! They fill it fill of that glue stuff so can't be messed with, I just dried it out and kept it inside on the tx side 👍

@rallypoint1 2 жыл бұрын

@@m6ceb 🤦🏻‍♂️…why wouldn’t they weather proof it? Smart move on your part.👍🏼