Effectively, a spool of enamel coated wire is in itself an inductor. Measure the "L" when it arrives, you may get lucky. LOL.....the demo was a great example of old fashioned practicality. Thanks for sharing. Homebrew 2nd order low pass. Not too shabby.
One tweak that you could've done was to reverse the polarity of one of the series capacitors, therefore essentially turning it into a true NON polarized capacitor, (which is what you really want for audio purposes), but as you wired it, it was still a polarized, (i.e. DC voltage rated), capacitor, which isn't the best thing for an audio signal, as audio signals are of course AC voltage.
Finaly i found a guy who actualy MAKE his own stuf....Other videos i found here on YT are based of bought parts from varios electro shops on internet. P.S.Sorry for my bad enlishg,i`am from Serbia.Pozdrav svima/Hello to y`all
Hi how can I make my own 12" subwoofer speaker bass crossover or bass filter what capacitors I need and a diagram for it I'm in need of one DIY for my speaker
Isso mesmo amigo! Precisa ser com capacitores não polarizados, ou tem que ligar em oposição um com o outro, ou se for polarizados tem que ligar negativo com o negativo.
Wire used is ENAMEL COATED - use sandpaper et emery cloth to scrape the soldering wires before soldering or tinning. 👀 Great vid ! WARNING.. removing wires such as this from tv tubes ? CRT tv sets operate via HIGH VOLTAGES such as 7.5 THOUSAND VOLTS and many of the capacitors in the tv sets can STORE high voltages.. The metal often spring like wire around the black or lead coated tube is there to discharge high voltages when the tv set is turned off HOWEVER I have ALWAYS made sure to wear decent rubber gloves when removing items from TV/old Computer CRT units - cutting the cable or harness as shown could result in shorting out a high voltage capacitor in circuit with the wires etc.. which could result in a rather unpleasant bang as the capacitor blows up remember IF you are using metal to cut through the wire harness etc.. Any cutters should ideally be high voltage insulated up to ie 500volts/1KV - Great vid but as said be advised ! You do not want to witness a capacitor blowing up.. OR getting a shock from a capacitor discharging 450volts into you! 👀 You can buy enamel coated wire OR scavenge it from lower voltage newer ie transistor / battery / low power tech. 👀
The wooden form does not have to be removed. The permeability of wood and air is nearly identical and thus has no appreciable affect on the coils inductance either way. Just don’t use a steel screw thru the form to attach it to the backboard. The steel could significantly increase the inductance.
Liked the voices of the bits & pieces. You made me LOL.. Even when I don't get everything you're talking about, I like the explanations provided, simplifying complex processes in a way I can understand and it's always fun to see what you come up with in your little workshop.
Guys (and gals) Im relatively new to this madness and super keen to learn some more... are there any comprehensive books on speaker build / crossover design anyone could suggest to me?
The polarized caps in series should be connected + to + for making up a non-polarized cap. Crossover caps MUST be non-polarized, otherwise a useful video.
Make sure you tell them you can only use non polarized capacitor in a output audio crossover since the output is ac that is why you put your capacitor in series so that makes them no polar now but you never expand that
Remake your wooden form and coat it in beeswax first so the urethane won't stick to it. but Nicely done, you made me remember my electronics classes in college for my A.S. Electronics degree; Thanks!
The inductor value is determined more accurately by coil size, wire gauge and cutting your wire length, no need to count the turns. The inductor may then be turned in a drill, so you'll have less time and effort and tighter tolerance to what value you want. There should be info online about inductor value per coil diameter, wire gauge and wire length. (I have a book containing this info)
The program is called Room EQ Wizard, and the microphone I was using is a Dayton Audio EMM-6 that came with a calibration file specific to my individual mic.
If you are making a non-polarized capacitor by hooking two polarized caps in series with their positive or negative ends together, the voltage rating of the cap is equal to the voltage rating of the cap with the lowest voltage rating. In other words you do NOT double the voltage rating (if you want to use the capacitor on AC, as in a crossover).
You messed up on the cap. The bands should be together. Anybody who copies this has a high chance of blowing their amp. And speaker. Dont ask how I know. lol.
Interesting - although I wouldn't call copper wire trash exactly, people pay money for copper scrap. I hope you soaked the coil in polyurethane anyway to prevent vibration of the windings against each other, significant forces are present once you turn the volume up.
Copper is pretty great for scrappers. This stuff was a pain to get to though, and IIRC only one of the half-dozen or so CRT TVs that I've come across have had copper with the others all being aluminum in the degaussing wire. If this crossover was going to be used for any length of time instead of just being a sort of demonstration exercise, then yes, that is a really handy tip about keeping the windings from vibrating and rubbing through their coating.
Nice attempt, but if you use electrolytic capacitors, you really should use reversible ones, yours don't look like reversible. However, if you connected your to caps correctly, back to back, you will have effectively made a reversible capacitor. Capacitors, generally, should not really be connected in series as they are likely to be slightly different capacitance to each other and will not share the voltage equally. Also, your air cored inductors will have a higher DC resistance than ferrite cored ones made with the same wire, and will therefore have greater power loss. your crossover will have a different performance to one made with proper components
Thanks. Another commentator already beat you to it on the use of polarized capacitors in the video. The likelihood for cascading failure with series capacitors is a good comment too. It was an internal debate whether or not to mention it in the video. I figured that since this was a prototype built from trash and there was no way I'd be using it for longer than a couple of minutes, it'd probably be reasonably safe.
That was very interesting winding proceadure... and the diameter of the coil is huge! Probably because you needed a few milli Henrys inductance! But the DCR, in this case, gets pretty big right? But what I really wanted to ask you is why, when you linked the capacitors in series, you did it by unifing the + and - terminals... I thought in a crossover the polarized capacitors are linked - to - terminals for obtaining a capacitor of a half size capacity, but a new NONpolarized capacitor! This is unusual... and I know there is a reason for that! Can you tell me what it is?
If you go to the inductor calculator link in the description, it'll tell you how much wire you need, radius, and number of turns for a whole range of wire gauges.
There's a link in the video description for a website that lets you calculate coil diameter and how many turns of wire you need based on the gauge of the wire and desired induction of the coil.
I made my own LP for sub, midHP for selected speakers and a dimmer for front to fine tune my 19 speaker setup (18 + sub) =) Also made from parts scavenged from old hardware. I'm wondering though, why lowpass @ 700hz? I would definitely start filtering highs @ around 200hz tops, even lower if I'd have good midrange speakers to go with the sub! It's gonna be 12db/oct anyways with a second order filter so even if you start at around 200hz you'll still hear those 800hz frequencies quietly. Subwoofer is for producing bass after all =)
Ah, this 15" is not a subwoofer though. This was a very, very temporary test setup for a midbass cabinet with a single horn-loaded 15" driver. It is designed to cross over to a horn-loaded compression driver for the high frequencies, and the lower bass frequencies would be handled by a separate subwoofer cabinet.
You can use plumbers plastic tube cut down for the coil 'former'. 22 gauge enamel coated wire available from Amazon or Ebay etc I'm confused re capacitors in PARALLEL and in SERIES ? I was of the belief that in SERIES 1 + 1 = 2 ? whereas in PARALLEL it is 1 (sum of the value ) divided by 1 would = 1? Resistors would be the same.. in SERIES a 30 Ohm resistor plus a 10 Ohm resistor would equal 30 +10 = 40 Ohms. whereas in PARALLEL = 30 divided by 10 = 3 Ohms!! Put an 8 ohm speaker in PARALLEL and you would be in trouble connecting that to an amp output of ie 4 or 8 Ohms as the resistance overall would be 1 Ohm.. !! However in SERIES those speakers would equate to approx 16 Ohms which would not I suspect, be a problem.👀👍
At time 4:12 the dog conducted his investigation of the wires and was ready to steer the work in a new direction. Yet we do not see him after his contribution - a shame.
I never bothered to read up enough on passive crossover layouts to figure out what all the different configurations are supposed to accomplish. This schematic was designed by an engineer at JBL sometime in the 1970s or earlier. It is for a 4560 cabinet / 3110A crossover. You can search online and find the 3110A schematic in PDF format.
An easier way to have done that, instead of counting, would have been to measure the distance of one loop of wire times the number of winds and then cut the wire off and use the lathe to wind it and it would have stopped automatically
Except that if you measured that way, the measurement would only be valid for one layer of windings. The subsequent layers of windings would each be longer than the previous ones.
Here you can find the magnet wire you need for all your coil projects! www.amazon.com/s?k=Emtel&ref=nb_sb_noss www.amazon.com/Emtel-Enameled-Transformer-Speaker-Magnetic/dp/B08N1FCMV9/ref=sr_1_3?dchild=1&keywords=Emtel&qid=1607248333&sr=8-3
I applaud your resourcefulness but keep a couple of things in mind. First the resistance of the coil is very important because the sum of the speaker and coil resistance will determine the damping factor of the woofer, more resistance equals less damping and thus less control of the woofer. The second point is electrolytic caps can be -10 and +50% of their marked value and still be in spec. usually caps from the same date code will be very similar to each other. Also film caps are much better than electrolytic caps.
That tolerance is only one of many. I use tons of capacitors in electronics repair and have never used any caps with that tolerance. Same date code? LOL Film caps are much better than electrolytics. Please explain...better how. Electrolytics have their place in a crossover as do film caps.
If he selected these caps from a junk box they could be of unknown lineage. Current electrolytic caps are usually 20% but older caps only made sure the capacity was at least the marked value and with Chinese caps I wish you good luck. I designed power supplies for decades so I was very aware of what cap specs were like and was careful to select t he right cap for the job. For a crossover cap you can use either a nonpolar cap or two normal electrolytics back to back (= to = or - to - so they would act as a bipolar cap), kust realize that back to back caps are not linear so they are not ideal. eople use electrolytic caps because they are cheap, Film caps are always better but they are more expensive.
Online crossover calculators unfortunately don't give results that work in reality. I explain why in my upcoming podcast about frequency crossovers. I also have a tutorial series where I explain how to design crossovers: th-cam.com/video/5Kvl0iBQ0L0/w-d-xo.html&index=2&list=PL4lJ1ej0uWlQjzOstioAZ1bd555vG9WHF The RC filter in a crossover has to be tuned for each driver individually. You don't even need it if you design the low pass correctly. Connecting two drivers in series is usually not a good idea. You have to make sure that the have exactly the same impedance curve if you want to do that. At 10:15 I see the effect with 12 dB attenuation per octave (1 to 2 kHz) but not really a good result. A 3rd order filter or a serial RLC circuit in parallel to the driver would be more suitable to suppress the resonance at 1.8 kHz. I recommend using the software ARTA for measurement because in it you can apply a timing gate on the measured data to suppress the room characteristcs.
That's some nice information and it looks like you took some good time to put it all together for us. I didn't happen to use an online crossover calculator to design this circuit. This circuit is from a JBL spec sheet for the 3110A crossover and was designed in the 1970s, if not earlier. This schematic was put together way before commonplace computer modeling and all the fun tools we get to use today. I managed to create a rough, but reasonably close version of it from trash where I had no idea if the tolerances on the components were close to spec and I even wired one of the capacitors backward. It was in use for only a few minutes, mostly for making sure the schematic was correct because I've read about other factory schematics containing terrible errors or omissions. It did happen to attenuate in the correct range, at approximately the right slope for the design. I do agree that if you were designing a crossover circuit nowadays that you'd likely want a steeper slope and plenty of real world testing to verify results. Oh, and the two drivers in series were the exact same model. Sure, there will be some variations between individual drivers, but eh, it was close enough for the simple frequency sweep I needed to do. I was actually quite surprised that a modern Dayton subwoofer driver in a horn loaded JBL cabinet managed to really closely approximate the factory response, despite having all the wrong driver specs for the cab.
CME both formulas are correct. C = C1 x C2/(C1 + C2) is a special case for 2 caps in series. Mario’s formula is the general formula for any number of caps in series.
I would like to build a crossover filter to cut low frequencies from a full range speaker. Cut less than 1000 Hz.The power of speaker is 350 RMS. Please can someone help me?
What he has built is a 2nd order x-over. The caps make it 2nd order. Which means the frequencies that need to disappear, will drop off faster than a 1st order (just the inductor by itself).
And the crossover frequency is determined by the combination of the inductance produced by the inductor and the capacitance produced by the capacitor. You can't just blindly pick a capacitor with certain value of capacitance and pair it with a random coil, their values are related to eachother when determining the crossover frequency!
@@TheMasterOfNone ok, in making a 1000watts 4x10 with a 150 watt tweeter bass cab, how to know what wire gauge and how many turns it takes so that the tweeter will only receive the 150 watts?
Good idea to reuse degauss wire, but keep an eye on the coating. Sometime the varnish is too old and just cracks. At th-cam.com/video/y6oPipWgj3o/w-d-xo.html, caps connected in serie formula on the white board.. C1/C2 ? Oups !... Better use C = (C1 x C2) / (C1 + C2) or equiv. 1/C = 1/C1 + 1/C2 Only if they are exactly the same, you can use C = C1 or C2 divided by two. But if you can use an unpolarized cap, it will be highly better than two caps connected back to back (because capacitance of a inverse polarized caps isn't the same as in the forward direction). This could produce unwanted distortion due to non linear behavior, and in the worst case: destruction of the caps. I use myself a tiny but powerful LCR meter for my homemade inductance, just visit www.peakelec.co.uk/acatalog/lcr40-atlas-lcr-meter.html
I cringed when he was cutting the wood on his chop saw. That's a good way to get your fingers cut off or mangled. The wood needs to rest completely against the fence or it will grab it and possibly take some of your fingers as well. Also, the hands are way to close to the blade. If OSHA saw that, you would definitely get fined. lol
Всё .Лампочка начала мигать(тесла-Штурман),потребитель !несопротивление ,а Перфоменс!(новое слово ,чел из 17века) ват?!!што это .,Протогениранец!!ват:Бет Пипол-знают ли они!о чудо ....можно просто закупорить магнету!!!..ДА.получился шуруповёрт.
Effectively, a spool of enamel coated wire is in itself an inductor. Measure the "L" when it arrives, you may get lucky. LOL.....the demo was a great example of old fashioned practicality. Thanks for sharing. Homebrew 2nd order low pass. Not too shabby.
One tweak that you could've done was to reverse the polarity of one of the series capacitors, therefore essentially turning it into a true NON polarized capacitor, (which is what you really want for audio purposes), but as you wired it, it was still a polarized, (i.e. DC voltage rated), capacitor, which isn't the best thing for an audio signal, as audio signals are of course AC voltage.
Finaly i found a guy who actualy MAKE his own stuf....Other videos i found here on YT are based of bought parts from varios electro shops on internet.
P.S.Sorry for my bad enlishg,i`am from Serbia.Pozdrav svima/Hello to y`all
Don't be sorry, your english is good enough :D
Hi how can I make my own 12" subwoofer speaker bass crossover or bass filter what capacitors I need and a diagram for it I'm in need of one DIY for my speaker
For a crossover, the capacitors must be non-polarized or also called bipolars to be able to let through them an alternating signal like music.
Isso mesmo amigo! Precisa ser com capacitores não polarizados, ou tem que ligar em oposição um com o outro, ou se for polarizados tem que ligar negativo com o negativo.
E mesmo. Ja respondei a outros sobre esse mesmo negocio. Eu modificei a descricao mas ninguem a le.
Wire used is ENAMEL COATED - use sandpaper et emery cloth to scrape the soldering wires before soldering or tinning. 👀 Great vid ! WARNING.. removing wires such as this from tv tubes ? CRT tv sets operate via HIGH VOLTAGES such as 7.5 THOUSAND VOLTS and many of the capacitors in the tv sets can STORE high voltages.. The metal often spring like wire around the black or lead coated tube is there to discharge high voltages when the tv set is turned off HOWEVER I have ALWAYS made sure to wear decent rubber gloves when removing items from TV/old Computer CRT units - cutting the cable or harness as shown could result in shorting out a high voltage capacitor in circuit with the wires etc.. which could result in a rather unpleasant bang as the capacitor blows up remember IF you are using metal to cut through the wire harness etc.. Any cutters should ideally be high voltage insulated up to ie 500volts/1KV - Great vid but as said be advised ! You do not want to witness a capacitor blowing up.. OR getting a shock from a capacitor discharging 450volts into you! 👀 You can buy enamel coated wire OR scavenge it from lower voltage newer ie transistor / battery / low power tech. 👀
Very well made and engaging video! I used to wind my own guitar pickups - much finer wire - but same principal in a way. Love this stuff!
The wooden form does not have to be removed. The permeability of wood and air is nearly identical and thus has no appreciable affect on the coils inductance either way. Just don’t use a steel screw thru the form to attach it to the backboard. The steel could significantly increase the inductance.
Quite true. I was removing it each time because I thought that if I perfected the technique, I could wind up using the form for other coils.
Liked the voices of the bits & pieces. You made me LOL.. Even when I don't get everything you're talking about, I like the explanations provided, simplifying complex processes in a way I can understand and it's always fun to see what you come up with in your little workshop.
Nu știu
hello, how are you, my friend? can you tell me how many meters of wire should i use for each frequency, and what thickness? thank you so much. like
Guys (and gals) Im relatively new to this madness and super keen to learn some more... are there any comprehensive books on speaker build / crossover design anyone could suggest to me?
The polarized caps in series should be connected + to + for making up a non-polarized cap. Crossover caps MUST be non-polarized, otherwise a useful video.
what about parallel connection ?
expert20valvehlx still need to me non-polarized
It should be done "anti-parallel": this is parallel with + of cap 1 connected to - of cap 2 and vice versa.
You seem to know your stuff, what does the ten olm resistor do in the curcuit around 8:15 do?
Good lesson seen
Nice 👍🏻👍🏻 🇮🇳 || Kuki
Make sure you tell them you can only use non polarized capacitor in a output audio crossover since the output is ac
that is why you put your capacitor in series so that makes them no polar now but you never expand that
Remake your wooden form and coat it in beeswax first so the urethane won't stick to it. but Nicely done, you made me remember my electronics classes in college for my A.S. Electronics degree; Thanks!
The inductor value is determined more accurately by coil size, wire gauge and cutting your wire length, no need to count the turns. The inductor may then be turned in a drill, so you'll have less time and effort and tighter tolerance to what value you want. There should be info online about inductor value per coil diameter, wire gauge and wire length. (I have a book containing this info)
TheFRiNgEguitars в5?мыс
Don't you need to use bi-polar capacitors?
I hope to do this one day ! Im been interested in the electronic hobby. Im new but willing to learn
Quantas voltas tem essas expiras ? E qual diâmetro ?
Please share the details of components used
Nicely done! Thank you for sharing your knowledge.
Dipping copper inductor coil in tar or roofing tar dampens the ringing of crossovers. You see in MacIntosh builds for a reason.
Thanks for sharing your knowledge on a diy crossover. I would also like to make one of my own but need to clarify if certain things would be possible.
Grazie per il bel video...puoi dirmi con quale programma per p.c. e con quale microfono hai effettuato il test ????? Grazie...
The program is called Room EQ Wizard, and the microphone I was using is a Dayton Audio EMM-6 that came with a calibration file specific to my individual mic.
Great video and idea.
If you are making a non-polarized capacitor by hooking two polarized caps in series with their positive or negative ends together, the voltage rating of the cap is equal to the voltage rating of the cap with the lowest voltage rating. In other words you do NOT double the voltage rating (if you want to use the capacitor on AC, as in a crossover).
How about that someone is wrong on the Internet. I don't mean the guy that made the video either.
Love the Bob’s Burgers reference
You messed up on the cap. The bands should be together. Anybody who copies this has a high chance of blowing their amp. And speaker. Dont ask how I know. lol.
Which value is the small capacitor
Hey man !!! You're a Dahmer...👍👍👍
Please can you tell me how much circles ill do ??
Interesting - although I wouldn't call copper wire trash exactly, people pay money for copper scrap. I hope you soaked the coil in polyurethane anyway to prevent vibration of the windings against each other, significant forces are present once you turn the volume up.
Copper is pretty great for scrappers. This stuff was a pain to get to though, and IIRC only one of the half-dozen or so CRT TVs that I've come across have had copper with the others all being aluminum in the degaussing wire.
If this crossover was going to be used for any length of time instead of just being a sort of demonstration exercise, then yes, that is a really handy tip about keeping the windings from vibrating and rubbing through their coating.
h
Nice attempt, but if you use electrolytic capacitors, you really should use reversible ones, yours don't look like reversible. However, if you connected your to caps correctly, back to back, you will have effectively made a reversible capacitor. Capacitors, generally, should not really be connected in series as they are likely to be slightly different capacitance to each other and will not share the voltage equally. Also, your air cored inductors will have a higher DC resistance than ferrite cored ones made with the same wire, and will therefore have greater power loss. your crossover will have a different performance to one made with proper components
Thanks. Another commentator already beat you to it on the use of polarized capacitors in the video. The likelihood for cascading failure with series capacitors is a good comment too. It was an internal debate whether or not to mention it in the video. I figured that since this was a prototype built from trash and there was no way I'd be using it for longer than a couple of minutes, it'd probably be reasonably safe.
That was very interesting winding proceadure... and the diameter of the coil is huge! Probably because you needed a few milli Henrys inductance! But the DCR, in this case, gets pretty big right?
But what I really wanted to ask you is why, when you linked the capacitors in series, you did it by unifing the + and - terminals... I thought in a crossover the polarized capacitors are linked - to - terminals for obtaining a capacitor of a half size capacity, but a new NONpolarized capacitor! This is unusual... and I know there is a reason for that! Can you tell me what it is?
Here to support your channel! Cool prototype
Thanks, I'm checking yours out and subbing right now.
Tanks, the coil tip was great
Newbie here, what would happen if you were to use 12 gauge wire instead of what you used? (other than it being harder to wind and take up more space)
If you go to the inductor calculator link in the description, it'll tell you how much wire you need, radius, and number of turns for a whole range of wire gauges.
What is the diameter and how many laps does it expire?
There's a link in the video description for a website that lets you calculate coil diameter and how many turns of wire you need based on the gauge of the wire and desired induction of the coil.
@@TinyLittleWorkshop What is the diameter and how many laps does it expire?
22 coil gauge How many turns ...?
I made my own LP for sub, midHP for selected speakers and a dimmer for front to fine tune my 19 speaker setup (18 + sub) =) Also made from parts scavenged from old hardware. I'm wondering though, why lowpass @ 700hz? I would definitely start filtering highs @ around 200hz tops, even lower if I'd have good midrange speakers to go with the sub! It's gonna be 12db/oct anyways with a second order filter so even if you start at around 200hz you'll still hear those 800hz frequencies quietly. Subwoofer is for producing bass after all =)
Ah, this 15" is not a subwoofer though. This was a very, very temporary test setup for a midbass cabinet with a single horn-loaded 15" driver. It is designed to cross over to a horn-loaded compression driver for the high frequencies, and the lower bass frequencies would be handled by a separate subwoofer cabinet.
inductance is not dependent of the wire material, resistence is
You can use plumbers plastic tube cut down for the coil 'former'. 22 gauge enamel coated wire available from Amazon or Ebay etc I'm confused re capacitors in PARALLEL and in SERIES ? I was of the belief that in SERIES 1 + 1 = 2 ? whereas in PARALLEL it is 1 (sum of the value ) divided by 1 would = 1? Resistors would be the same.. in SERIES a 30 Ohm resistor plus a 10 Ohm resistor would equal 30 +10 = 40 Ohms. whereas in PARALLEL = 30 divided by 10 = 3 Ohms!! Put an 8 ohm speaker in PARALLEL and you would be in trouble connecting that to an amp output of ie 4 or 8 Ohms as the resistance overall would be 1 Ohm.. !! However in SERIES those speakers would equate to approx 16 Ohms which would not I suspect, be a problem.👀👍
Is this prtotipe in the detector métaux
Untuk pemasangan...nya sebaiknya..seris atau paralel.
Bos.. thanks..!!
Tergantung koilnya dipasang di tweeter atau woofer Om..
Thank you sir for capacitors information..
If you want to look like Nikola Tesla you should part your hair in the middle. 😁😜
Hey thats FANTASTIC no really you got me
At time 4:12 the dog conducted his investigation of the wires and was ready to steer the work in a new direction. Yet we do not see him after his contribution - a shame.
Me gusta como usa tu conocimientos para darlos a los demás
C1/c2 is wrong. It should have been c1/2 or c2/2 since the capacitors are the same. The actual formula is (c1+c2)/c1*c2
sir what is the value of small capacitor there? I cant zoom in diagram ..tnx
I never bothered to read up enough on passive crossover layouts to figure out what all the different configurations are supposed to accomplish. This schematic was designed by an engineer at JBL sometime in the 1970s or earlier. It is for a 4560 cabinet / 3110A crossover. You can search online and find the 3110A schematic in PDF format.
Series is:
1/C= (1/C1)+(1/C2)
C=(C1xC2)/(C1+C2)
An easier way to have done that, instead of counting, would have been to measure the distance of one loop of wire times the number of winds and then cut the wire off and use the lathe to wind it and it would have stopped automatically
Except that if you measured that way, the measurement would only be valid for one layer of windings. The subsequent layers of windings would each be longer than the previous ones.
Thanks for this.
لو حضرتك فاهم فكرة التجربة باختصار ممكن تقولي لاني مش قادر افهم ؟
Here you can find the magnet wire you need for all your coil projects!
www.amazon.com/s?k=Emtel&ref=nb_sb_noss
www.amazon.com/Emtel-Enameled-Transformer-Speaker-Magnetic/dp/B08N1FCMV9/ref=sr_1_3?dchild=1&keywords=Emtel&qid=1607248333&sr=8-3
why drain a lot of wires possible and on the insights of parts to solder
Awesome
I applaud your resourcefulness but keep a couple of things in mind. First the resistance of the coil is very important because the sum of the speaker and coil resistance will determine the damping factor of the woofer, more resistance equals less damping and thus less control of the woofer. The second point is electrolytic caps can be -10 and +50% of their marked value and still be in spec. usually caps from the same date code will be very similar to each other. Also film caps are much better than electrolytic caps.
That tolerance is only one of many. I use tons of capacitors in electronics repair and have never used any caps with that tolerance. Same date code? LOL Film caps are much better than electrolytics. Please explain...better how. Electrolytics have their place in a crossover as do film caps.
If he selected these caps from a junk box they could be of unknown lineage. Current electrolytic caps are usually 20% but older caps only made sure the capacity was at least the marked value and with Chinese caps I wish you good luck.
I designed power supplies for decades so I was very aware of what cap specs were like and was careful to select t he right cap for the job. For a crossover cap you can use either a nonpolar cap or two normal electrolytics back to back (= to = or - to - so they would act as a bipolar cap), kust realize that back to back caps are not linear so they are not ideal.
eople use electrolytic caps because they are cheap, Film caps are always better but they are more expensive.
Hello, how much your prototype ?
This x-over is more than enough, made in the day for 20 watt amps.
هل يمكن أن تعرفنا على أسماء القطع و رقمها
Nice job sir.. thanks for this..
un capo mr bigotes
Nice Sir 🙋
Online crossover calculators unfortunately don't give results that work in reality. I explain why in my upcoming podcast about frequency crossovers.
I also have a tutorial series where I explain how to design crossovers: th-cam.com/video/5Kvl0iBQ0L0/w-d-xo.html&index=2&list=PL4lJ1ej0uWlQjzOstioAZ1bd555vG9WHF
The RC filter in a crossover has to be tuned for each driver individually. You don't even need it if you design the low pass correctly.
Connecting two drivers in series is usually not a good idea. You have to make sure that the have exactly the same impedance curve if you want to do that.
At 10:15 I see the effect with 12 dB attenuation per octave (1 to 2 kHz) but not really a good result. A 3rd order filter or a serial RLC circuit in parallel to the driver would be more suitable to suppress the resonance at 1.8 kHz.
I recommend using the software ARTA for measurement because in it you can apply a timing gate on the measured data to suppress the room characteristcs.
That's some nice information and it looks like you took some good time to put it all together for us. I didn't happen to use an online crossover calculator to design this circuit. This circuit is from a JBL spec sheet for the 3110A crossover and was designed in the 1970s, if not earlier. This schematic was put together way before commonplace computer modeling and all the fun tools we get to use today.
I managed to create a rough, but reasonably close version of it from trash where I had no idea if the tolerances on the components were close to spec and I even wired one of the capacitors backward. It was in use for only a few minutes, mostly for making sure the schematic was correct because I've read about other factory schematics containing terrible errors or omissions. It did happen to attenuate in the correct range, at approximately the right slope for the design. I do agree that if you were designing a crossover circuit nowadays that you'd likely want a steeper slope and plenty of real world testing to verify results.
Oh, and the two drivers in series were the exact same model. Sure, there will be some variations between individual drivers, but eh, it was close enough for the simple frequency sweep I needed to do. I was actually quite surprised that a modern Dayton subwoofer driver in a horn loaded JBL cabinet managed to really closely approximate the factory response, despite having all the wrong driver specs for the cab.
The intro and the Hand was fucklng Awesome!!😂😂😂
Hard penis
Plz is this e director métaux ?
@ 6'20" series capacitors, on the blackboard, 1/C = 1/C1 + 1/C2, NOT C1/C2!
Isn't it C1 x C2 / C1 + C2 = C12
CME both formulas are correct. C = C1 x C2/(C1 + C2) is a special case for 2 caps in series. Mario’s formula is the general formula for any number of caps in series.
Good sir and thanks do mor in that tipe invention
how about 327 need some return support thanks byw you spent some time on those videos.
Subbing back, thanks!
Very interesting video!!
Pretty rad Dude!
I would like to build a crossover filter to cut low frequencies from a full range speaker. Cut less than 1000 Hz.The power of speaker is 350 RMS.
Please can someone help me?
What is the resistance of the speaker at 1 khz...
No speak inglés. Lo que haces es genial 😊👍
Thanks
Wow!!! Nice boss.
Really good and informative video.Hit the button and liked.
`so 23 1/2 micro farads caps are best for bass? very good diy vid and kick ass stash
😄
What he has built is a 2nd order x-over. The caps make it 2nd order. Which means the frequencies that need to disappear, will drop off faster than a 1st order (just the inductor by itself).
And the crossover frequency is determined by the combination of the inductance produced by the inductor and the capacitance produced by the capacitor. You can't just blindly pick a capacitor with certain value of capacitance and pair it with a random coil, their values are related to eachother when determining the crossover frequency!
مساء تلخير
@@TheMasterOfNone ok, in making a 1000watts 4x10 with a 150 watt tweeter bass cab, how to know what wire gauge and how many turns it takes so that the tweeter will only receive the 150 watts?
please list everything u used in your project so that i can also try thats if dont mind
Good idea to reuse degauss wire, but keep an eye on the coating. Sometime the varnish is too old and just cracks.
At th-cam.com/video/y6oPipWgj3o/w-d-xo.html, caps connected in serie formula on the white board.. C1/C2 ? Oups !... Better use C = (C1 x C2) / (C1 + C2) or equiv. 1/C = 1/C1 + 1/C2
Only if they are exactly the same, you can use C = C1 or C2 divided by two.
But if you can use an unpolarized cap, it will be highly better than two caps connected back to back (because capacitance of a inverse polarized caps isn't the same as in the forward direction). This could produce unwanted distortion due to non linear behavior, and in the worst case: destruction of the caps.
I use myself a tiny but powerful LCR meter for my homemade inductance, just visit www.peakelec.co.uk/acatalog/lcr40-atlas-lcr-meter.html
Mind your fingers with that saw!!!
I cringed when he was cutting the wood on his chop saw. That's a good way to get your fingers cut off or mangled. The wood needs to rest completely against the fence or it will grab it and possibly take some of your fingers as well. Also, the hands are way to close to the blade. If OSHA saw that, you would definitely get fined. lol
Where is the input and output ?
Everything I build is a prototype.
ابن سوريا مر من هنا👋👋
I need those wire connectors ✌️👍
دون تجربة ميدانية حقيقة لا يتكلم أحد
good vid , lloks like plumbing solder
Good laek.. 👍👍💕🌷
Mr.batmen what is this?😞
Great video my friend 👍👍❤️❤️
MUY BUEN TUTORIAL M GUSTARIA Q M LO PASEN EN CASTELLANO GRACIAS SALUDO D ARGENTINA
Muito obrigado
Hello Salam paz.thanks
ممكن ترجمة بالغة العربية وشكرا
You need to make or buy a decent microphone circuit.
scatman john ???
what u r made the coli ....without an iron rod it will not work
It will, you just need more wire to get the same inductance.
Use a empty teflon tape case
Всё .Лампочка начала мигать(тесла-Штурман),потребитель !несопротивление ,а Перфоменс!(новое слово ,чел из 17века) ват?!!што это .,Протогениранец!!ват:Бет Пипол-знают ли они!о чудо ....можно просто закупорить магнету!!!..ДА.получился шуруповёрт.