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Great Tour! Very informative. Does anyone here speak HAM RADIO de WA4CIF

plot twist: alastor finds it and broadcasts screams on it

Ferrite up + down: No-no!

7:42 that's because when you hold an antenna YOU become part of the antenna circuit, your body becomes part of the grounding system! That's a dead giveaway the antenna lacks a good ground leg or you're standing on poor soil/rock for good ground. All antenna in theory are some form of a dipole (like classic rabbit ears) with a positive and negative/ground element that rapidly flip polarity as the radio waves hit them, some of them just "hide" one pole/ear to save space by using different tricks. You can often solve that by adding the right length of wire trimmed to roughly match the frequency used to a ground point somewhere, using say an eye-crimp fitting onto a chassis grounded screw somewhere on the radio. Those are called a "Tiger Tail" in amateur radio and often work well for handhelds or portable setups once you tune the length.

AM radio quality in the UK has gone way down since DAB (which itself is often at 32K 'quality' and more susceptible to interference than FM)

We had an emergency alert test (just on phone) a while back, neither my phone or my wife's received the alert

That old dell pc tower where the hd bay is... Aint seen them since middle scool in 07

all of the emergency broadcasts are in AM here in louisiana, which is VITAL for hurricane evacuation information. it's posted all along i-10 here.

Now let me preface by saying I'm not a lawyer, nor engineer, nor radio expert. That being said, I think folks are being confused by the law. The interference is for the broadcast in general, not for in-car interference, as I read it. It's illegal to start a broadcast on 106.1 FM, if you're an unlicensed broadcaster and/or a licensed broadcaster is legally using that frequency. I can't burst in on 106.1 KISS FM to broadcast my own pirate station. These laws, from what I gather (and I could be wrong), were aimed at pirate stations, not for hyper local interference (radio interference on your radio in your car, from your car, for instance). You can legally have hyper local interference. Remember how you used to have to use those radio adapters for mp3 players and early smart phones You plugged it into your car 12V plug, and it would create a weak, hyper local radio station that your FM car radio could pick up, and you could then hear your music in a car without bluetooth nor an AUX port. Those things lasted many many years, and the FCC never said a peep. I maybe way off in this, but seeing how those radio transmitters for cars were legally sold for years, I think the interference is more about illegal broadcasts, or radio station frequencies bleeding over into one another. I don't think a car producing interference that only its own radio will pick up is illegal, but I maybe wrong. As for AM radio in cars, seeing how its solely taken up with conservative talk radio stations and basically nothing else, I think its fine to sunset it in cars. Most folks who want to keep it are people who listened to it a lot growing up. Now, let me add on that I'm nearly 40, so not some young Gen Z kid. Cant go saying "kids these days!". With the ability of anyone to start a podcast, internet radio station, a youtube channel, or the numerous other ways to broadcast online plus the extreme prevalence of smart phones and always connected devices, it's time to let AM sunset. It's going to happen sooner or later, and frankly I get all my emergency information far faster digitally these days, and not from AM. AM is often delayed, where as I can access numerous sources of information digitally at once. Sooner or later AM will die. No need to drag it out, because of long lost nostalgia for a time when it wasn't trash radio.

Damn this radio is from 2077

I know I can Google it, but what's the freq?

Pops has a lot of knowledge!!!

This whole deal of AM radio was hashed over in the 70s. The FCC told them they could not drop AM radio and the FCC was to set new quality standards.

AM radio travels further in flat areas. Great for when you drive across the USA on the East to West, especially in the low populated areas. You may hear a lot of talk shows and golden oldies radio shows from the 50s and 60s, like Lone Ranger, X-1, or Amos & Andy.

You need an electronic load to test your batteries and power supplies.

This would go over well in france

Is it possible for an AM radio station to have a continuous range of several hundred miles like in the movie "Vanishing Point". What is the range of small city/school/student transmitters with a power of 5 - 50 watts? Best regards.

Fascinating as the previous video despite all i dont understand.

If you want to link this to your cellphone via wifi...do you have to pay a subscription? Who gets the information when you open the app? Thanks...I am almost ready to buy.

1000000W is good for health ❤❤❤😂😂😂🎉🎉🎉

You need to get with the times and move to fm radio its much better sound clarity and am is dieing out in most places in Europe because fm and digital radio and streaming radio is the way to go

Girls: Why do we live longer than boys? *Meanwhile the boys:*

Be a fun tool for the Part 15 AM transmitters.

Brother imagine the EMI when you crank that thing.

It's like a Presto Hot Dogger.

It’s a blessing to have a Dad like that. He is one of the “if you knew half of what he forgot, you would be a genius “ type of guys.

Were the call letters of this station WENR?

Seems like you two have got your calibration set as well.

10:15 This is one of the rare cases where it would be worth it. Play learning some super interesting leading edge physics and horology stuff before being choked out. Sounds like an ideal Friday night date to be honest. 😁😬

This brought back memories. Around 50 years ago I went out with the engineer with a receiver, but it used tubes and it was much larger and heavier. We put it on our shoulders. We spent the whole morning doing just one lobe. Both of us had our First Phone licenses but I had never worked at a station. It was just as you described. The station was a 3 tower array in the RF ghetto of 1410 KHz. :) I guess we were testing the daytime pattern, but I don't remember for sure.

Hey Jeff, have you come across Meshtastic / LoRaWAN yet? Thought it might be a nice crossover between radio and raspberry pi for you and your dad to cover and experiment with!

Warning signs should be put up around these towers. What if kids climb the fence? Yes I know they shouldn't, etc. etc. But how much does a couple signs and posts cost compared to preventing death? I have an engineering degree (computer engineering) and I never knew that the tower structures themselves were energized. I always assumed the energized antenna was at the top and that the metal structure would be earth grounded. Obviously not the case. I guess it depends on how high the tower is and what the 1/4w of the lowest TxFreq is. Around 130meters for bottom of AM radio if I remember right.

grr8

That's a BE FM transmitter PA module in the background (the long thing with all the cooling fins). Pre-FMi series.

This is an amazing video. Thank you for sharing.

I just found your channel and am enjoying your projects and topics. For your bench, I would add a decent digital microscope, some nice led lighting under those shelves, and a small fume extracting fan.

All that technology just to do something as stupid as air Rush Limbaugh

I recently bought a Korad supply. Its pretty decent. Linear power supply. Microscope. I have a Amscope SE400Z. Its alright but not the best. I mounted mine to a vesa monitor arm so the base isn't in the way. Also just the other day I got another vesa monitor arm that came with a laptop mount. So it gets my laptop off my workbench. I now need to build shelves like you've done. I don't have room for my power supply or dedicated spots for my pinecil or 858D hot air station. Dripper needle bottles for IPA, as well as those ones with the metal basin. I forget the name but they're used for nail polish acetone. qtip dispenser. Theres those gridfinity 3d prints that looked neat for organization but my printers tiny. I wish my worktop was better. Just using one of those fold up plastic outdoor tables. Not sure what to do for shelving yet.

Instead of drilling first, why not set the width assemble the first layer and then fix. Saves any error in alignment.

I found a VHF meter at a yard sale years ago. The meter came off it's jewel pivot, and it's battery compartment had corrosion, but it all cleaned up well on the bench. Cost me $200. Also, found several European FSMs from KSL Farnsworth Peak, which we gave to The Old Cable TV Equipment Museum.

RUSH WOULD HAVE LOVED THIS --- KMOX WAS HIS HOMETOWN STATION ON HIS NETWORK!!

How about using a fruit like an apple, orange, or a banana?

Because there are still some people that will pay for such things.

the fact that you made the short loop like that is almost as stupid as the fact that you thought rush Limbaugh's dumb dead ass was worth mentioning

Certain older pieces of test gear are still considered a valuable must for calibrating particular types of equipment. This is why for instance a particular HP VTVM model is considered more desirable over another.

I miss working with my Dad. He tried to keep me away from his tools and equipment as a kid. Wouldn't let me anywhere near his shop or equipment.... Until he finally realized there was nothing he could do to keep me from working with my hands . He Wanted me to focus on academics and become a dentist or doctor and not "waste my time working with tools". He was a taxidermist for 61 years. As well as a knife maker and had patented materials/ high performance composites that he sold in bulk to all the biggest companies in the gun and knife industry over the last 30 years. He finally gave up trying to keep me away from the tools and working with my hands. So by the age of about 15 he tolerated me using the stuff in his shop. I really miss working with him. He Passed away a few weeks ago. Miss you Dad

The FIM-41 is the big brother that goes up to 5 MHz. That works on some shortwave systems, but was mostly used to certify 2nd and 3rd harmonic compliance, before NRSC cutoff rules required a spectrum analyzer. A major use not mentioned is ground conductivity studies of co- and adjacent channel signals to a potential new AM DA, in regions of the country where rock often makes soil conductivity demonstrably lower than 47 CFR presumptive charts. The nature of FCC designated DA monitor points as license conditions, usually 1-4 miles from a TX site and based on larger studies after new construction or major changes, could be described far better. Also missing from this video is how use of the null perpendicular to the received signal is used to evaluate quality of a potential measurement point. A null less than 10:1 is a horribly disrupted spot, or one with power or phone cables or metal structures distorting the signal levels. Get over 40:1 null at right angles to signal, and that's a really clean point. There's not just one antenna in that meter lid, but two. One is the normal receive antenna, and the other a transmit loop for the calibrate oscillator. The BNC input could also allow use of the FIM as a sensitive detector, such as with a Delta OIB-3 Operating Impedance Bridge. That could be done at increments above and below carrier frequency, trying to adjust for a flat resistive and balanced around zero at carrier reactive impedance curve. Try parsing that calibration certificate again. 1 or 2 percent tolerances.... with so many stacked details as to the basis of the reference fields and their use calibrating meters, that the lumped sum of worst case errors could stack into the 20-40 percent potential inaccuracy range, even if far better precision. Not that I've evern learned to lean slightly, to anchor an elbow in one side, while holding an FIM stable in one hand while fine tuning adjustments with the other.... And then rotate for the null, evaluate point quality, calibrate, rotate back, and measure, and record notes. Lather, rinse, repeat, sometimes out 100-250 miles from another station's site, if doing ground conductivity field studies Rarely past 20 miles in normal proofs.

I wonder what cancer rates are like near this thing? The fact that it carried Rush Limpball's poison means it definitely caused a lot of suffering.

AM is alive and well. Almost 5K U.S. stations are thriving. There are more FM stations but that's partly because of more limited range on that band and there needs to be more of them to cover the country to the level that AM does.

I'm surprised that there are so few field strength meters in the U.S. given that theres almost 5K AM broadcsat stations and ~6K FM stations. Do the stations share them amongst each other?