Відео

Thanks Allen, very useful

my best teacher

The first new shortwave radio I purchased as a young teen in the late 70s, and I still have it, and the owner's manual! Lot of great DX QSL had with this radio. Nice instructional video, I learned a few things.

I have question to your last section. Where you added voltage to LPF output (VcoIN) and the PLL compensated for that by varying the phase. I understand that it should happen for the transient time of the loop. But the should the PLL compensated for this additional voltage offset that you have added by decreasing its PD output and then bring the PLL to a lock. Why does your phase shifted waveform look so stable. I was imagining more of a jitter.

While I am seeing only Superheterodyne receivers, I'd like to know whether we can make a Superheterodyne transmitter. I think yes. Please let me know if I'm wrong

Most excellent !!!

I was just started to studying RF, and i watched so many videos but couldnt uderstand the IQ stuff , thanks to you i can move further, thank you so much sir, u really explained it very clearly.thanks again.

Thanks for the impressively thorough, and well presented video. I just got a litevna and am very impressed with what it can do. I thought I might "need" a better device than this, but it is plenty powerful for everything I currently want to measure.

Nice explanation! Thank you

Still valuable and excellent, and it will be even in two decades from now on. A really outstanding quality in terms of clarity, accuracy and style. Can't thank you enough for your work!

WOW!!!!!!! THANKS FOR WALKING US THRU YOUR NOTES,... EXCELLENT DESCRIPTIONS!!!... GREAT DEMO!!! THANKS!!!

Wondering what the results would be using both at the same time.

Very nice and more informative video, Thanks sir ! 😊😊😊

So does the NanoVNA connect to the tuner and then the tuner connects to the antenna? Presumably once you have it all tuned to the frequency you want to work (as per the video) you disconnect the NanoVNA from the tuner & connect the transceiver to the tuner. Great explanation as it makes it all look so simple.

I have never seen anybody assemble a circuit board like this. Very cool, And for how old this video is, you must have had a serious camera.

I love my WRC vertical, but the radials are just so inconvenient -- just ordered the faraday cloth, can't wait to add that to the arsenal.

I am giving power to my LNA of 12 volt but it not getting power power up it is generally stopping at 9.3-9.4 volt how to fix this

Love your ability to explain complex stuff in such a short time Alan, amazing little circuit condenses a lot like yourself!! hihihihi

How could you hook this up to rg8 coax go analyze etc??? The connect looks so small

Normally We are using decimals for calc..

I remember a video of a guy (using shf) demonstrating how antennas worked using very tiny antennas. It was pretty amazing. He had verticals, dipoles, beams, loops and so on.

Beware oF NYC ? Why ?

Setting up my nano with this video. Thanks so much! 😊

That clarification was cool

The patient is finally died or not sir..😅😅

Thank you for actually explaining the different kind of crimper, and how far to go, and not to go, when squeezing the crimper down. I was wondering whether I could just use the general crimper. I watched three other videos before this one and none of them explained it. I almost didn't even bother to watch this video, and now I'm glad I did.

Really great presentation and walked us through all the basic concepts with great examples.

Great video! I'm wondering if this tests components in circuit? I'd also like to know if it tests high power transistors and MOSFETS the way it's designed? Thanks

Great video :)

Great as always. Extremely helpful in helping me find out what mistake i was making with my own op amp implementation of this.

I think there are a few mistakes in axis labeling of a graph. Shouldn't it be Ic vs Vce rather than Ic vs Vbe?

Try doing the same test with out the tri pod sitting on the cloth , but use a jumper to connect to it. Tri pod then the cloth running long ways away from it. should be a lot better.

Hi. Great product. I’m curious if I wanted to see the real time domain wlan signal that is going to the antenna would it be possible? Thank you very much

Absolutely fantastic! Thanks so much for this. Can I please have the episode number for the probe you made?

If you add a hitch extension they you could use your tailgate as a table.

What happens to the demodulated signal if you add a bandpass filter (presumably at the IF) setting the bandwidth to something like 200hz. Would this effectively round off the rise and fall time making it more like a sine wave than a square wave?

Cool. Very interesting. Thanks for explaining it so well.

So, all this functionality (besides the flip flop that doubles the freq) are on the CD4046B)?

Old crap, buy a VNWA for 45€ and demonstrate its capacity from 100kHz to 500MHz

Interesting... The mathematics and rational seem sound. The test seems more than adequate. Using the oscilloscope to measure and test is cool. But how would you calibrate either radio? 72 de W7UDT

✨ I’ve assembled a key like that the other day too. Very curious. Some people say it's comfortable to use in cold weather and rain. I'll have to check it out.

Great video!

The near field probes are often used effectively to detect emissions from PCB assemblies. Would these probes be as effective to detect the sources of emission in Power Electronic equipment of > 50 KVA rating, like a UPS or a VFD?

very good explanation ! thanks

11 years on and you're still the best and electronic master. Just to let you know:- One of the finest videos you made was on the CMOS Phase Locked Loop, (CD 4046). That was truly a master class! Thank you Mr. Wolfe!

Hi Alan, thank you for such amazing video, as usual. I always wondered how the "common mode choke" only applies impedance to the coax shield and not the core. I feel like it really makes sense on a balanced transmission line, but when it is applied to a coax, it really doesn't make too much sense to me. (I admit maybe I am just not understanding this properly.) Perhaps a video about common mode choke and how it works on coax (+/- how to measure it??) would be great. Pil VA3GPJ

For those struggling to get DfuSeDemo to recognise the NanoVNA-H in Windows 10. Connect NanoVNA to PC in DFU mode then find the driver "STM32 Bootloader" in device manager right click on it to select "update driver". Choose 'Browse my computer for drivers' and navigate to C:\Program Files (x86)\STMicroelectronics\Software\DfuSe v3.0.6\ (click on include sub-folders in the searching for drivers) then select 'let me pick from a list of drivers on my computer'. You'll see two options; ' STM Device in DFU Mode' and 'STM32 Bootloader' select 'STM Device in DFU Mode' to load this driver. In Device Manager you'll see 'STM Device in DFU Mode' instead of the 'STM32 Bootloader'. You'll find that DfuSeDemo will now recognise your NanoVNA-H. Or at least this worked for me.

Thanks for the very clear descriptions!

Thank you so much for such an easy explanation on these high voltage probes. Love your videos keep them rolling!! 73's

👍Thank you sir.