Fantastic video upload. Thank you! This was a time when people were being educated by educators. Some teachers are still educators but many others are simply doing the job because they can do nothing else. I speak from experience. I became appalled at the quality of the handouts being given to students and when I offered to help by speaking to the teacher in private, I was later admonished by the senior management for undermining that teacher - and many teachers complained even though it didn't cost them anything to have the work tidied up for the sake of clarity. One teacher in particular saw what I was able to do and approached me to help develop a series of three work books for junior high school pupils. These books were so successful - the content was amazing and I simply tidied it up from the original xeroxed copies which were also converted using OCR software - that the inspection board commented favourably on them and remarked that while other schools had similar projects, none of them were close to that level of meeting the curriculum accurately. I've since moved on from education to my first love of electronics and hence, I find myself here watching a video about filters...
You need to understand that back in the day we were just learning this stuff so things were simpler Remember that this video is.. what ...50s, 60s so perhaps 60 or 70 years old, Now we only really started Understanding and using electricity from around 150 odd years ago. This generation LITERALLY would have likely been the 2nd generation possibly to use electricity. that's why things were explained simply
+Rex Holes Well, sure it is. You use a high pass filer to feed the tweeter and a low-pass to drive the woofer. If you have one, use a bandpass filter to drive the midrange. The very tricky part is to match the frequencies the speakers are best at with the cutoff frequencies of the filters. Also make sure the cutoff freqs overlap a little so there's no freqs that get completely killed. It is tricky, but still something a good amateur can work on.
i'm dissapointed, why is this not in 1080p NNNNNNNNNNAAAAAAAAAAAAAAHHHHHH i'm just kidding, i mean OF COURSE i'm not trying to piss anyone off, i accept that i stepped over a line and i formerly apologize :P
These series of old yet gold DoD lectures are truly amazing for reasons they are well explained with no details left untouched and great hands-on examples to go along with. Thank you Public Resource channel for uploading all these videos!!!
Ask your teacher why they don't teach by the water theory, like the military does in the NEETS series. If you understand hydraulics, then you can understand electricity, as the same formulas are used, just the terms are different. The water theory is much easier to understand.
If you understand hydraulics, the application of knowledge allows you to understand pneumatics and electricity. It also allows you to understand less obvious subjects such as fluid dynamics and traffic systems. Think about it, all of these things have elements which restrict or resist, pass or reject, and are subject to a steady flow in order to be understood.
I am 44 years old and its the first time in my life I understand filters ! thanks to the United state of America, really.
Excellent video, although it sounds like the soundtrack needs some noise filtering!
Fantastic video upload. Thank you!
This was a time when people were being educated by educators.
Some teachers are still educators but many others are simply doing the job because they can do nothing else. I speak from experience. I became appalled at the quality of the handouts being given to students and when I offered to help by speaking to the teacher in private, I was later admonished by the senior management for undermining that teacher - and many teachers complained even though it didn't cost them anything to have the work tidied up for the sake of clarity.
One teacher in particular saw what I was able to do and approached me to help develop a series of three work books for junior high school pupils. These books were so successful - the content was amazing and I simply tidied it up from the original xeroxed copies which were also converted using OCR software - that the inspection board commented favourably on them and remarked that while other schools had similar projects, none of them were close to that level of meeting the curriculum accurately.
I've since moved on from education to my first love of electronics and hence, I find myself here watching a video about filters...
0:30 You can tell how old this video is when they include a filtered cigarette on a list of examples of filters XD
He even knew they were bad for us.
Great explanation, isn't it a shame that an old video explains to me better than my teacher does?
You need to understand that back in the day we were just learning this stuff so things were simpler
Remember that this video is.. what ...50s, 60s so perhaps 60 or 70 years old,
Now we only really started Understanding and using electricity from around 150 odd years ago.
This generation LITERALLY would have likely been the 2nd generation possibly to use electricity. that's why things were explained simply
Someone needs to filter the audio, very scratchy in spots. Wow $4iT got real. Best explanation I have ever heard.
Best value for R in this example ohms or 100 ohms...thanks Kp4 bp...
Oh man. University would have been so much easier with these videos at our disposal
Isnt this how to build audio crossovers?
+Rex Holes Well, sure it is. You use a high pass filer to feed the tweeter and a low-pass to drive the woofer. If you have one, use a bandpass filter to drive the midrange.
The very tricky part is to match the frequencies the speakers are best at with the cutoff frequencies of the filters. Also make sure the cutoff freqs overlap a little so there's no freqs that get completely killed. It is tricky, but still something a good amateur can work on.
i'm dissapointed, why is this not in 1080p
NNNNNNNNNNAAAAAAAAAAAAAAHHHHHH
i'm just kidding, i mean OF COURSE i'm not trying to piss anyone off, i accept that i stepped over a line and i formerly apologize :P
I hope they cure my cats cataract.
These series of old yet gold DoD lectures are truly amazing for reasons they are well explained with no details left untouched and great hands-on examples to go along with. Thank you Public Resource channel for uploading all these videos!!!
Ask your teacher why they don't teach by the water theory, like the military does in the NEETS series. If you understand hydraulics, then you can understand electricity, as the same formulas are used, just the terms are different. The water theory is much easier to understand.
If you understand hydraulics, the application of knowledge allows you to understand pneumatics and electricity. It also allows you to understand less obvious subjects such as fluid dynamics and traffic systems. Think about it, all of these things have elements which restrict or resist, pass or reject, and are subject to a steady flow in order to be understood.
Great