HAM RADIO: UnUn Transformer 16:1 9:1 4:1 all on One Core....

Time to make another Transformer/UnUn this time for curiosity and perhaps for my holidays ( if there's room in the car). This build is a 4,9,16 to 1 on a single core.....Short Video Holiday calling....
I am using a 43 mix 240 core
To prevent copy right issues ( I had commercial radio on in the background) I have had to add a sound track sorry to all that do not like music..... :(
Please subscribe and like.
Cheers
Mike - M0MSN
P.S. do not take my word for it, give it a go for yourself.

[@acestudioscouk-Ace-G0ACE]

A very useful bit of kit, especially when experimenting. Thanks for making this video. 👍😃

[@seanwood8043]

Great job as always excellent craftsmanship very useful for a field day kit when trying to pack lighter. As always your videos are worth waiting for ,thanks for what you do.

[@A.R.O.T.A.]

Hi Mike, The <a href="#" class="seekto" data-time="961">16:1</a> is for a specific very broad banded antenna known as a T2FD or TTFD. The shortest version being the Diamond 330s that I used for about 1 year. I used mine in the bands 160m-10m and I am informed it also works on 6m, The key to how it works is in the wire wound resister of between 800-1200 ohm.

[@DaveW6OOD]

Excellent design and implementation. I'll have to try this one.

[@johnk8091]

As always, very good and neat work Mike. Enjoy your holiday, and when you get back I would love to see a video of this txfr connected to various length wires

[@mike-M0MSN]

Will have to give that a go..😊

[@noomnoom8469]

Perfect. I was thinking about something similar to this.

[@enioamaraldepaiva6837]

É PERFEITO MEUS PARABÉNS PW8BR AMARAL

[@richardwhitcroftkc3rrw63]

nice work

[@craigpalmer9196]

thank you

[@DXCommanderHQ]

Good show mate!

[@mike-M0MSN]

Cheers Cal.

[@brianei6jg847]

Great video and I love your work. Any chance of a link to the schematic please.

[@mariannevanoostenbrugge3541]

thanks nice piece of usefull equipment , what about testing and the scematics ?

[@ajmiller7102]

Good videos, but room for improvement. 1) the video insert onto the wiring diagram covered part of the diagram....2) what is the power handling capabilities? 3) test results of the build. Thanks for posting!!!

[@mike-M0MSN]

Noted

[@mahargkp]

Hi Mike...Thanks for all your videos...I'm learning a lot from you...just in the process of making your 80 spiral loop....Would love to see your results using this unun... especially the 4-1....Many thanks..m1bsz...

[@mike-M0MSN]

Great suggestion! I will try to make a video soon. :)

[@mahargkp]

@@mike-M0MSN Thanks for the reply Mike.. appreciate it...The only items which I find hard to get are the variable cap.... Is it possible to put some sizes of the veins up so I can copy them...If not I'm sure I can figure something out...Thank you for all your time you dedicate to help others

[@black5f]

Hi. Great video. I'm a bit into CB but mostly listen to aircraft using a SDR and old but great AR1500 scanner which was my Dads and I managed, with my basic knowledge, to fix. (Caveat ... I don't really understand what I am doing!) but had a lot of success making flower pot design antennae for listening. Can these be used to transmit on? A CB tuned one would be 5m though, but very light weight (taped to a fishing pole). I have a very old CB (27/81) mag mount which developed a fault I had to fix. I was intrigued by it's design. A whip with a coil at the base with the coax tapped off a few coils up? This seems to me a very simple design to replicate? Obviously reliant on a ground plane (a car). Question 3 ha ha. Have 3 cars, one is an old 96 Camaro ... which has ... fibre glass roof, door skins plastic, bonnet (I'm in UK) metal, hatch metal bumpers plastic. Any ideas on best design for a mobile CB antennae for a plastic car? I'm 60, and learning!

[@johnnorth9355]

Me I'm lazy - I would just take one of each and keep it simple ! Enjoy the break Mike. M7BLC

[@brianei6jg847]

Great video and thanks, I really enjoy your videos. Any chance of a link to the schematic please. ?

[@FindLiberty]

Try pausing video at 0:25 and then use Windows Snipping Tool to save as jpg

[@walteranderson7889]

Wiish we could have seen some VNA test results.

[@davidelley8979]

N8NK QRP has a couple of videos of multiple taps, which I have made and found useful for end fed wire antenna's.

[@garylanders1470]

Great build, thanks for sharing! I'm not sure if this is a ridiculous question, but here goes. Would it be doable to run two or three different length antennas off of this simultaneously? Say a 41' on the <a href="#" class="seekto" data-time="541">9:1</a>, a 17.5' or 25' on the <a href="#" class="seekto" data-time="241">4:1</a> and 11' 8.4" 5/8 wave for 6m on the <a href="#" class="seekto" data-time="961">16:1</a>? Thank you kindly

[@GoonyMclinux]

You can but if you model it in software all hell breaks loose. 👀

[@stephennelson-smith3312]

Do you have a part number, specificatiom, or supplier for the enamelled wire? I have some but I think it's much too thin.

[@Alcohen2006]

I love music. I could easily do without this particular soundtrack.

[@mike-M0MSN]

Yes me too

[@noomnoom8469]

Could this be made with a rotary switch?

[@McPilot_W3DDS]

Great video. Your Picture in Picture blocked the schematic.

[@FindLiberty]

pause at 0:25

[@isidrohuguet6825]

El esquema es un Toroide T 200, yo tengo el T 200/2 ¿es apto. para este montaje.?. También veo que en la construcción se esta empelando otro Toroide distinto al esquema...¿cual es o cual me recomiendas.?-- Saludos cordiales desde la Zona EA..Gracias por tu tiempo...

[@schatzperson]

Is this toroid iron powder type -2 ? I thought this material was red/brown ?

[@sveinfarstad3897]

Nice Mike, Next test: Revolve them all tree wires then wind and test...? I did a test on a 25mm core with 0,7mm wire for QRP and was good.

[@sveinfarstad3897]

9:1

[@CKJEntertainmentServ]

Mike, how did you come up with using a t200 ferrite?.

[@mike-M0MSN]

it's a 43mix??

[@michealbell5042]

Hi Mike can please make a 12 to 1.

[@mike-M0MSN]

Why? What for?

[@michealbell5042]

@@mike-M0MSN Hi Mike. Because thay say this is one way to match 600 ohm balanced ladar line, yet no one has done video on it. Thay use 3 balun in one to do this I think it's a 1 to 1 and two 9 to 1. But like I said no has done a video maybe it all bull dust , anyway maybe you can help thanks Mike.

[@mike-M0MSN]

@@michealbell5042I will see what I can do. 😊

[@tapaschakraborty3961]

Sir required One blank BOX For experiments purposes de VU2TKC KOLKATA INDIA.

[@ronrico2620]

Title says unun in the video says balun. Is this a balun or unun?

[@mike-M0MSN]

Well no, a balun (balanced to unbalanced) unun, (unbalanced to unbalanced) so a EFHW uses a unun and a dipole uses a balun.

[@garyclark1000]

Pic in Pic blocks the schematic. Schematic shows T200 core but you are using a fair rite type. 3 wires instead of four. I think its time you scrapped this video and started again. It's really unhelpful and can be confusing to some. sorry to be negative your videos are normally top notch.

[@75ohmHAM]

I may have spent way too much time money and effort, but I've concluded that you random dudes love to throw power away,

[@mike-M0MSN]

yep