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Nice one! Thanks!!!

Gday Ape, If you were using the same mix with your test setup but with differing sized toroids (eg 240-43 & 140-43) would you expect the same attenuation curve? Meaning toroid size only affects power handling capacity and the toroid mix determines freq verse attenuation performance? Thanks

Always informative, great video

Your flawed paper cutting test gives the impression that the knife sharpening is inadequate. May I suggest photocopy paper, notebook paper, etc. I sharpen my knives on a whetstone and a ceramic rod and in a few strokes my knives are hair shaving sharp.

Can you do a 2400watt 220v x times 2 AC test using kettle and a vacumm cleaner together

Boom Ape 🦧. Busted 😊 well done 73 man

Thank for measurement. I think Your very small loses are from connectors. Myth are growing where basic physical knowledge is not assimilated. One "CZcams expert " show antenna installation in a truck and gives advice "if you have too long cable, NEVER ROLL in a loop because of COLOSSAL LOSES - lay down freely in zigzag". Without physics hards to distinguish in a brain common vs differential current.

Good stuff. I have been a General Operator for 1 year this month. I have learned a great deal from your videos. I am getting the study book for Extra next week. This is a great hobby. Ed, KM4MMD

Another great video. Straight to the point and using straight forward language. THANKS

It's a choke not a balun, it transforms nothing!

Please please reply! An audio signal can have varying frequency and amplitude and both are the part of the information. But as per my knowledge , Frequency modulation is a technique where the frequency of the carrier wave is varied according to the amplitude or intensity of the modulating signal. So how does this work if under FM, if the carrier wave only has the in information about the intensity or the amplitude of the modulating signal as in FM , the carrier frequency is varied according to the intensity? Someone had told me to use a Voltage Controllable Oscillator(VCO), but the question remain as VCOs also vary the frequency according to the intensity of the input signal.What if the input signal is also varying in frequency (ofcourse inside a range)?

Would there be more loss on vhf and up? If so would today be a factor of the choke or the rg58 used on this choke? Awesome video!!

Would like to see it done while connected to an antenna ! Where if there were going to be any RF coming back, perhaps we might see something different ?

Thank you for this format. You clearly explained the topic in a short and direct video. Streamlined information like that feels like your sinuses opening up and being able to truly take a full and fresh breath of air compared to other videos that wing it and are five times longer than they need to be. Thank you for your effort.

almost nobody need pure sine inverter. they are only needed if you use electric brushed motors. everything people normally uses has switching power supply inside with the first thing on the board being a bridge.

Very informative. Can you just calibrate with the lead attached, instead of setting the E delay? Cheers

This was a completely pointless exercise as there is no interaction between the signal in the coax and the core it is wound around and therefore it could not ever have shown any loss. Either Ape doesn't know this, because he doesn't understand what's going on, or he does know this and is playing silly games. Either way, the clown show continues...

As always, time VERY well spent watching - for me - thank you. KQ4IXD

Thank you Sir. I learned a lot. Be interesting to repeat this on an “ugly “ balun ie several turns of coax taped together.

Interesting results. I would expect the loss to increase with frequency, so I am puzzled about the 14Mhz result, I would have expected a loss of about 1.5%. I would like to see more results with different choke/baluns. However, the loss is insignificant for ham radio use. I just don't like outliers I can't explain.

Had a RTL SDR V4, didint show up.

thanks a lot. i'm just getting started with this thing

The ham cops probably have a warrant out for you now. What size toroid is that?

Hey Smoking, good video topic. Based on looks the cheaper inductance tester has the same layout so I expect its the same device only without the fancy case.

Did I just hear ape go from watts to db to claim a difference is small? ;)

Given the magnetic field is completely cancelled in the core, it's invisible. For reference, 1% loss is 0.05db, sweet bugger all :)

What is K-Type classification itself? As opposed to any of the numbered mix designations (43, 31, etc)? I'm no metallurgist but I am suspect when a new classification that does not distinguish itself with testing first.

Have you ever checked out the Baofeng DM-1701? I'm just curious. I have one, and had a friend of mine at a 2way radio shop check mine out. After loading the OpenGD77 software on it. My DM-1701 tested at -43 db at high power, which was < 5w, and hardly any deviation. Needed no alignment.

I have the uv-9r plus it came with a regular antenna which fits fine and a whip antenna that i cant figure out how to get it to fit any help would be appreciated thanks

Would like to see it in action and some VSWR measurements😢

Great

Cigarette Monkey

There is an excellent way to test this on the air live and in real time. Using a big screen monitor bring up 5 or 6 KiwiSDR receivers around US or elsewhere, tune up the transmitter on a clear frequency as heard on the Kiwis, then tune in your signal on the KiwiSDR receivers. Choose a power level that produces a signal above the mud. Start your screen recorder so you have a record of your activies. Use CW or an unmodulated FM. End of test 1. Now install the choke balun, don't change anything else - same tuning. The screen capture is logging it all. End of test 2. Now tweak your transmitter or what ever your final tuning device is. End of test 3. Too simple, no? The S meters on the KiwiSDRs will faithfully record your signal under these three setups. Finally, remove the choke balun and repeat the test to identify band condition changes. This test can reveal transmitted power loss, angle of radiation changes as a function of the choke balun in the system.

I wonder if the 10 meter loss would come down if a different mix was used.

This, this is vindication!!! Well played, good Sir, well played!!!

Nice job, Ape, thanks!

HAve to wait 5 minutes for all the dam adds!

People who say they don't work and aren't necessary will someday be pulling their hair out trying to fix a problem a chock would fix. I had an RF problem and today every wire and cord has chocks on them.

A outer jacket coax ferrite CMC suppression choke will not create any loss. The loss that you will get from the type shown is due to the connectors, this is why you use slip on beads and terminate the coax after the beads are on, this way there is no connector loss which is minute anyway.

Hey Ape, Rick, K2XT here. You put up a catchy title, hinting there was some myth to be debunked. Then you made a simple test in an environment that doesn't require a balun. Your balun there on your bench doesn't see any common mode current from the non-radiating load; therefore it is not being stressed at all. The only possible losses would come from the lousy, lossy rg58 and the way you have it wound so tight on that core. Others have suggested, why didn't you measure the loss of the rg58 alone and you should see some little loss that is greater on 10 meters than 80. So, you didn't really analyze or provide the newbie viewer with a reason for your conclusion. Since you tried to convince the viewer that CM chokes don't have much loss and let them go away with that little jewel of technical fact how then do you explain why some CM choke vendors sell "2 kw" and even "5 kw" chokes, with multiple stacked cores? Why 5 kw? Because the 2 kw ones are burning up, so throw a bigger choke at the problem. DXE will be happy to take your money. So, in conclusion, you claim to have debunked a myth but in reality the viewer is no closer to understanding what is really going on in their antenna system. i.e. what effect the feedline length from feedpoint to where it is grounded has on the common mode impedance of the outer shield. When that is understood and evaluated then the reason why CM chokes heat up at all can be explained. Until that is accomplished "myths" will continue. Agree? Here's what's going to happen - someone watches this video, believes this puts the issue of choke losses to bed (just look at the comments to see how quickly they became convinced and give 5 thumbs up for the video). Then he puts up a OCF or G5RV and his choke heats up and maybe cracks the core due to horrendous CM current. "But wait, Ape said losses are a myth, why did DXE say I need a bigger CM choke, a 5 kw model?" Sending warmest 73, Rick K2XT ps This topic is quite complex

Love it! "You want data? Heres your data" Side note: It would be interesting to see how many chokes you could hook up, in line, before it takes it down an s-point...I suppose you could use math too but what fun is that?

Thank you so much The Smokin Ape☺️

Ok next questions. Is it necessary to even use a balun for a perfect match like a dummy load? What happens to the loss when the swr goes up? What frequencies is that even capable of choking?

Pico?

BOOM! -Mic drop!

Indeed it's prudent to NOT get too wrapped around the torroid about loss.....😂