You so often make videos on radio theory topics I've been meaning to get my head around, you're a credit to the community, 73.

kept staring at the dot - We love Lord Callum - We love Lord Callum - We love Lord Callum !!!🤣🤣

"poke a balloon in the middle" 🤯 such a simple explanation to understand 😂 thanks!

But this is why i keep two antennas. I have my 12.4m Signature, That i absolutely love. And a 135' Doublet fed with 600ohm. If one doesn't get the contact, the other will.

Fantastic explanation!

Love this, very good videos explaining dB!

I love when you draw things! Have you ever thought of raffling off those sketch books for charity? They are works of art technically.😊 Thanks again for all that you do!

thanks Call 73!

R..iii..ght errr I’ll take your word for this Cal 😵‍💫 I’m really p.poor at anything maths… I’ve just got plus minus times divide understood, coz I’m thick I suppose… 🧐 still passed my G0 licence though way back when I was just an harmonic 😆 🤣 💙

I've always wanted to build a 2 element 40 meter Yaggi. I have the space for it, but often I am just too busy elsewhere. I used to build up to 4 element vertical 10 meter Yaggis like a rope ladder and I used a 12.5 calculated impedance at the feedpoint to make them very short in boom length. I then used a folded dipole as the driven element to alter impedance back to about 50 ohms. They worked really well, unfortunately the technique does not scale up to 40 meter size easily. You guys, have likely already had the fun of building one but I need a piece of the fun pie too & antennas certainly are fun to make effective....

Hi Callum, trying to access your website via iPad or iPhone and I get a notification that it couldn’t establish a secure connection to the server. Maybe an Apple Safari thing dont know. Regards Mike

Cal. Thanks for showing the dBb ruler, or dB relative to bananas measurerer. :) Ha!

Is it legal in the UK to stick your fingers in a balloon? Goodness, I must be missing out. Great Video as usual. KB3NG

So, more banana's are better?🍌😂 Thanks Callum. ;)

Helpful, now i'll have to watch the Db vid AGAIN. Maths defeats me especially when - x - = + and then there's 3.142........where does it end.........Wigglies and Bananas. Good Grief !

Everything's relative. Especially in Alabama. New measurement, dBb. Relative length to a banana. As for poking fingers in balloons and bulges changing shape, my belt does that to my stomach.

The Sun is a pretty good isotropic radiator.

First. Good afternoon cal

1:09 Fill the balloon with water, then the analogy works. 🙂 Water in incompressible, air is not. Anyway, that nitpicking. Nice video, good explanation.

Heii Call🫡 I'm steal here and watchig you👻 My friend

I dislike dBi because it changes with height and the quality of the ground, using it for comparison takes the thoroughness of a man like Cebik, I would say no one else ever explains their comparison in enough detail for it to be even worth reading.

Real explanation very cool 😎KQ4OHB

Then there is dBDXC 😂

Dbi needs to be canned. Dbd and dbd over average ground more reasonable. These companies will never understand that true gain sells. Innov meh they’re getting better. Not quite there yet.