I subscribe to both of your channels, commendable work done by two very knowledgeable gentlemen! Thank you both for the wealth of knowledge you have shared to those of us who are intrigued by this sort of Magik! 😉
The schematic is not correct and it is wrongly placed on the internet For correct biasing, the two diodes must be placed in the circuit in reverse order Two diodes are connected in series and the anode is connected to the base of the transistor and the cathode is connected to the emitter
Awesome thanks from Australia. I worked for the Australian navy as an electronics technician in training and our lecturers would teach just like this video. Great training by people who could explain and communicate. Yes I did learn and it bought back some great memories.
You've explained pretty much everything I learned from experience ! The snubber diode I hadn't thought off. I mainly relied on my fet high drain to source voltage tolerance. Had an issue that blew my power supply when I decided to parallel the fets. The unclamped voltage of the primary was to high, the psu was clamped by a pair of schotty diodes that heated and malfunctionned. I got 7 to 8 amp at 32V from a 1.3Mhz secondary. Really scary angry flame. I made other coil since but the best way to drive high frequency coil seems to be from secondary direct feedback. Using a TVS diode to protect the base/gate is a must. I can't wait to look at your next video. Thanks !
Jim, thank you. Right now i am studying as an electrical apprentice here at BCIT in Canada. A project woth my son is going to be a small tesla coil. Most videos just show how, and what to put where. I enjoyed the format, the knowledge, and even the safety tips. I am now a subscriber, and thanks to you my projects will be better and safer.
You're truly a gift, thank you for this video. You solved so many questions I had and didn't know to ask. The snubber circuit was a question I was wondering how I would fix. Thank you. Also the medical warning, so fantastic. Thank you. I'm Wayne Lambright, I figured out how gravity control works and I need high voltage to make it work. I'll let you, know if my prototype flies.
Jim. Thanks should go to you for an excellent vid. Interesting , informative and all subjects clearly and carefully explained. I've been coiling for nearly ten years now , and still learning ! Excellent work.
Excellent video Jim! Thanks to your very clear explanation of the Slayer circuit, I’m now more confident of building one that won’t destroy itself! It takes a lot of time and effort to film and edit these videos and this is one of the best I have seen in terms of getting started with Tesla coil construction.
Great work Jim, excellent video thank you! I have a Siglent SDS1104X-E oscilloscope (100MHz) with Siglent AWG and followed your work to find resonance without success. As my AWG module operates from the scope itself rather than a separate unit like you have, my scope screen is more cramped which may also expIain why I have a lot more 'noise' with my coil signal overlayed onto the generated signal. Splitting the scope screen and zooming into the coil signal provides better definition, and whilst there is more 'noise', I can see both the generated signal and the coil signal clearly but I don't see any decrease in signal as you have successfully demonstrated at the resonant frequencies. I started at 1kHz and slowly increased to 10MHz several times without seeing any decrease in the signal. I also watched the signals via my web link which provides scope control and viewing on my computer monitor which makes viewing easier . Now I have sore eyes and a tired brain so will have to rest for a while. I would greatly appreciate if you could please provide any further insight. Thanks again
The only thing that I can suggest is to make sure your Oscilloscope, power supply, and oscillator are all grounded to the same place. Thanks for your comment.
The snubber is a good idea. I've run a slayer exciter on a mosfet as a quick experiment a couple pf years ago, but didn't have time to finisj experimenting. I was hoping you had a more detailed analysis like you did in this video. I'm bummed that you haven't posted a follow-up!
Good information. Thanks! The biasing resistor is needed only to start the oscillation. So receiving coils don't need it. It's also possible to trigger the start with external spark. The hairpin circuit seems a lot more safe, cause it isolates the oscillation from the source. Spark gap also has chaotic frequency that adapts to the load, so seems like it doesn't cause nerve damage that easily.
Thanks sir, that was a great class. We really apreciate the fact that you are sharing such valuable knowledge out there. Even your burns and problems with the camera , i think its important to include those bits , mistakes are oportunities to learn. That was really cool.
Hello Jim, this was an excellent video! I loved every single part of it... Could you please make a video, about more complicated Slayer Exciter circuit? I'm having a hard time understanding the purpose of the components in a more complicated circuits. In this video you talked about the Snubber so I was thinking if you could explain more of these small parts of circuit that make up the whole circuit. Thanks in advance Jim, Best regards
Hello Jim, Do I have to measure the Collector to Emitter voltage from Peak to Peak voltage or "Peak/Max voltage" with my oscillocope? The transistor datasheet shows the max Collector to emitter voltage as DC voltage, but the Primary coil has AC voltage, sinusoidal waveform. I hope you can help me.
Hi Jim. Very interesting masterclass. I've learned many new concepts and keep in mind the three life saving safety items to work with transistors. And.... I loved the power recycling led snubber network, that was the cake cherry to me! Best regards from Julian !
Excellent presentation. Thanks for sharing. Just have a practical question, however. Finally, at the end of it all, what can a Tesla coil like this do, to generate usable energy, in excess of what it consumes, if at all? Thank you.
Grazie a te. Ora io sto provando con un mosfet. Ho capito che il tuo schema non funziona con mosfet. Cosa devo cambiare per farlo funzionare? (mosfet IRFP260).
Hello Jim, How Can I know what value to use for the Transistor Base Resistor, I'm using a Toshiba 2SC5200 NPN transistor, but it only works with a base resistor lower than or equals to 10K ohms.
The exact value can not be predicted because of all the variables involved with the primary and secondary coils. In general you should use the highest value that allows oscillation, which is what you must have done. Thanks for your comment.
@@Jimscoolstuff Thank you so much. I have been trying to make the same circuit. I got it to work but wanted to add the protection. Great work. Thank you again.
Never put a capacitor directly across a switching transistor. There is nothing to limit the current when the transistor turns on, and the transistor can be destroyed.
@@Jimscoolstuff i built the circuit your video showed and instead of placing a cap across the emitter and collector, i placed the cap across the base and emitter and it worked. totally eliminated the need for the snubber circuit with just one part. i haven't burned a single transistor because of the new over voltage protection from the 100v cap. when the cap was placed between emitter and collector, i found that the oscillation stopped. thanks for the nice video.
When an inductor is connected in parallel with a capacitor the impedance goes very high at resonance. When an inductor and capacitor are connected in series the impedance goes very low at resonance. Thanks for your comment,
@Jimscoolstuff so it can be tuned either way depending on where you have the capacitor. Why does this matter? Under what circumstances would you want to use a capacitor in series or parallel to the inductor?
I used a lathe with a horizontal feed rate as close to the wire diameter as I could get. I held the wire with a rag to maintain tension. I rested my hand on the tool post and manually guided the wire. I used the lowest spindle speed setting. Thanks for your comment.
@@Jimscoolstuff I have a lot of questions I would like to ask you about tesla coils. Is there a way I can contact you? I’m a total noob and I don’t want to make any fatal mistakes. You seem to be an expert on the subject.
@@Jimscoolstuff Thanks have a nice day. The snubber saves transistors picking the correct values works as shown the led gives indication when transistor has is close or hit collector voltage limit. There is another video same subject had the solution for transistor failure was to just stack them many as you want in parallel, over voltage failure can make even greater quantities of magic smoke until the power source is current limited out. The dreaded entire work station can go surge pulse mode damage to anything powered on joy joy... The frequency sweep method to find resonance with the top load variations give best way to give the eyes on real world changes to values for a part that has been created original as 1 of 1.Your description so far best. Thanks
Jim, excellent work.
Thanks for your kind comment. I enjoy your channel as well. Best regards.
I subscribe to both of your channels, commendable work done by two very knowledgeable gentlemen! Thank you both for the wealth of knowledge you have shared to those of us who are intrigued by this sort of Magik! 😉
@@alloverflorida5886 Thanks for your kind words. Best regards.
Just getting into the world of high voltage and both of your channels are going to be huge help!
The schematic is not correct and it is wrongly placed on the internet For correct biasing, the two diodes must be placed in the circuit in reverse order
Two diodes are connected in series and the anode is connected to the base of the transistor and the cathode is connected to the emitter
Love it! It’s a lecture thats colleges forgot to add to their curriculum. It’s some real gold you are putting out for free
Thanks for your nice comment.
Awesome thanks from Australia. I worked for the Australian navy as an electronics technician in training and our lecturers would teach just like this video. Great training by people who could explain and communicate. Yes I did learn and it bought back some great memories.
Thank you for your nice comment.
This channel is way underrated! Great job Jim!
Thank you for your nice comment.
Finally someone explains every little component and why its needed/helps protect the circuit! awesome...
Thanks for your comment. It is nice to know when a video is appreciated.
agreed
You've explained pretty much everything I learned from experience ! The snubber diode I hadn't thought off. I mainly relied on my fet high drain to source voltage tolerance. Had an issue that blew my power supply when I decided to parallel the fets. The unclamped voltage of the primary was to high, the psu was clamped by a pair of schotty diodes that heated and malfunctionned. I got 7 to 8 amp at 32V from a 1.3Mhz secondary. Really scary angry flame. I made other coil since but the best way to drive high frequency coil seems to be from secondary direct feedback. Using a TVS diode to protect the base/gate is a must. I can't wait to look at your next video. Thanks !
Thanks for your comment.
I built my first Tesla coil 50 years ago. You learned me some new stuff.
Thank you for your comment.
Jim, thank you. Right now i am studying as an electrical apprentice here at BCIT in Canada. A project woth my son is going to be a small tesla coil.
Most videos just show how, and what to put where.
I enjoyed the format, the knowledge, and even the safety tips.
I am now a subscriber, and thanks to you my projects will be better and safer.
Thank you for your nice comments.
Jim, I can't tell you how valuable this video was. It really helped me understand my project much better. Thank you very much.
Thank you for your nice comment. Good luck on your project.
You're truly a gift, thank you for this video. You solved so many questions I had and didn't know to ask. The snubber circuit was a question I was wondering how I would fix. Thank you. Also the medical warning, so fantastic. Thank you. I'm Wayne Lambright, I figured out how gravity control works and I need high voltage to make it work. I'll let you, know if my prototype flies.
Thankyou for the nice comment.
Jim. Thanks should go to you for an excellent vid. Interesting , informative and all subjects clearly and carefully explained. I've been coiling for nearly ten years now , and still learning !
Excellent work.
Thanks for your kind words.
Excellent video Jim! Thanks to your very clear explanation of the Slayer circuit, I’m now more confident of building one that won’t destroy itself! It takes a lot of time and effort to film and edit these videos and this is one of the best I have seen in terms of getting started with Tesla coil construction.
Thank you for your nice comment.
Try using more transistors in parallel to each other.
Great work Jim, excellent video thank you! I have a Siglent SDS1104X-E oscilloscope (100MHz) with Siglent AWG and followed your work to find resonance without success. As my AWG module operates from the scope itself rather than a separate unit like you have, my scope screen is more cramped which may also expIain why I have a lot more 'noise' with my coil signal overlayed onto the generated signal. Splitting the scope screen and zooming into the coil signal provides better definition, and whilst there is more 'noise', I can see both the generated signal and the coil signal clearly but I don't see any decrease in signal as you have successfully demonstrated at the resonant frequencies. I started at 1kHz and slowly increased to 10MHz several times without seeing any decrease in the signal. I also watched the signals via my web link which provides scope control and viewing on my computer monitor which makes viewing easier . Now I have sore eyes and a tired brain so will have to rest for a while. I would greatly appreciate if you could please provide any further insight. Thanks again
The only thing that I can suggest is to make sure your Oscilloscope, power supply, and oscillator are all grounded to the same place. Thanks for your comment.
@@Jimscoolstuff Thanks Jim, much appreciated!
The snubber is a good idea. I've run a slayer exciter on a mosfet as a quick experiment a couple pf years ago, but didn't have time to finisj experimenting. I was hoping you had a more detailed analysis like you did in this video. I'm bummed that you haven't posted a follow-up!
Good information. Thanks! The biasing resistor is needed only to start the oscillation. So receiving coils don't need it. It's also possible to trigger the start with external spark. The hairpin circuit seems a lot more safe, cause it isolates the oscillation from the source. Spark gap also has chaotic frequency that adapts to the load, so seems like it doesn't cause nerve damage that easily.
Thanks for your comment.
Thank you for your video. You are an excellent teacher. You have a great gift for teaching. God bless you.
Thank you for your very nice comment. Best regards, Jim
Very clear explanation. Excellent video. I love the fact that the electronics are explained in detail.
Thank you for your nice comment.
Thank you for the clarification. I feel like building a tesla coil immediately.
Thanks for your comment.
Thanks sir, that was a great class. We really apreciate the fact that you are sharing such valuable knowledge out there.
Even your burns and problems with the camera , i think its important to include those bits , mistakes are oportunities to learn. That was really cool.
Thanks for your nice comment.
Hello Jim, this was an excellent video! I loved every single part of it... Could you please make a video, about more complicated Slayer Exciter circuit? I'm having a hard time understanding the purpose of the components in a more complicated circuits. In this video you talked about the Snubber so I was thinking if you could explain more of these small parts of circuit that make up the whole circuit.
Thanks in advance Jim,
Best regards
Thank you for your comment. At present I am working mainly on amateur radio videos. I may not get back to Tesla coils for some time.
Best regards
best explanation yet ,congratulations,sir.
Thank you for your comment.
Hello Jim,
Do I have to measure the Collector to Emitter voltage from Peak to Peak voltage or "Peak/Max voltage" with my oscillocope?
The transistor datasheet shows the max Collector to emitter voltage as DC voltage, but the Primary coil has AC voltage, sinusoidal waveform. I hope you can help me.
The important voltage is the maximum positive voltage above the emitter voltage.
@@Jimscoolstuff Thank you very much for your help Jim !!!. You are the best.
@@alfred3305 Thanks for your nice comment; be safe.
Awesome stuff!! Thank you! That snubber circuit is clever! I've never seen anything like that before.
Thanks for your nice comment.
Hi Jim. Very interesting masterclass.
I've learned many new concepts and keep in mind the three life saving safety items to work with transistors.
And.... I loved the power recycling led snubber network, that was the cake cherry to me!
Best regards from Julian !
Thanks for your nice comment.
Very clear and backed up with good graphic support.
Thanks for your comment.
Your awesome! Thanks for the great explanation. 🙏
Thanks for your nice comment.
Thanks for posting this video! It is greatly appreciated!
Thanks for your nice comment.
42:00 How to bulletproof the Slayer Tesla Coil?
Thank you for posting Jim! Rocking on !!!
Thanks for your comment.
@Jimscoolstuff thank you!!
Hey cool video! My son and I just made one for HS science class.. this video was helpful. Thank you for posting!
Thanks for your comment.
Excellent presentation. Thanks for sharing. Just have a practical question, however. Finally, at the end of it all, what can a Tesla coil like this do, to generate usable energy, in excess of what it consumes, if at all? Thank you.
The Tesla coil is not magic. It cannot generate more energy than it uses. Thanks for your comment.
@@Jimscoolstuff Thank you. Understood. Waste of time for me. 😄😄
Grazie a te. Ora io sto provando con un mosfet. Ho capito che il tuo schema non funziona con mosfet. Cosa devo cambiare per farlo funzionare? (mosfet IRFP260).
Hello Jim,
What Diodes are you using on your Slayer Exciter between the Emitter and Base?
I'm using the diode UF4007.
I used 1N4006 diodes because I had them on hand.
Hello Jim, How Can I know what value to use for the Transistor Base Resistor, I'm using a Toshiba 2SC5200 NPN transistor, but it only works with a base resistor lower than or equals to 10K ohms.
The exact value can not be predicted because of all the variables involved with the primary and secondary coils. In general you should use the highest value that allows oscillation, which is what you must have done. Thanks for your comment.
Hello Jim. How do you connect the oscillocope probe to measure the transistor collector voltage?
connect the ground lead of the probe to the emitter of the transistor, and the probe tip to the collector. Make sure you are using a X10 probe.
do you have a part # on the tvs diodes? and all other diodes in circuit? Letters and numbers on diodes would help.
The diodes that I used were 1n4006. This is a 1 Amp, 800v diode. A lower voltage diode will work just fine. I used the 1n4006 because I had them.
@@Jimscoolstuff Thank you so much. I have been trying to make the same circuit. I got it to work but wanted to add the protection. Great work. Thank you again.
Thanks for your comment.@@nathanbunten4299
Thanks for your time
Thanks for your comment. Best regards.
wouldn't a 100v 47nf mylar cap between emitter and collector be a better option for over voltage protection of the transistor?
Never put a capacitor directly across a switching transistor. There is nothing to limit the current when the transistor turns on, and the transistor can be destroyed.
@@Jimscoolstuff i built the circuit your video showed and instead of placing a cap across the emitter and collector, i placed the cap across the base and emitter and it worked. totally eliminated the need for the snubber circuit with just one part. i haven't burned a single transistor because of the new over voltage protection from the 100v cap. when the cap was placed between emitter and collector, i found that the oscillation stopped. thanks for the nice video.
@@maatewelove7310 Thanks for the information. What value of capacitor did you use?
@@Jimscoolstuff 100 volt 47nf mylar capacitor.
@@maatewelove7310 Thanks
I want to develop an off grid tesla type coil just to charge two battery banks (without solar) charging one while using the other. Can this be done?
You say "off grid" and "without solar" so where are you planning to get the energy to charge the Battery?
What about those with flat spiral secondary coils? They seem to be a lot more compact.. Does this still work with the S. Exciter type?
I am not familiar with the type of coil you are describing so I can't answer your question.
yes slayer exciters can drive 'pancake' Tesla coils
Your channel is a treasure
Thanks for your kind comment.
I've always been told that the self resonant frequency is when the amplitude is at its highest peak, not the lowest. Can you please explain this?
When an inductor is connected in parallel with a capacitor the impedance goes very high at resonance. When an inductor and capacitor are connected in series the impedance goes very low at resonance. Thanks for your comment,
@Jimscoolstuff so it can be tuned either way depending on where you have the capacitor. Why does this matter? Under what circumstances would you want to use a capacitor in series or parallel to the inductor?
@@freedomer342 Series and parallel resonance is discussed in the video. There are many applications of each.
Excellent video. Why I don't need a Tesla coil... 👍🙏🇺🇸
Thanks for your comment.
Very very very good explanations
VERY COOL STUFF...
l'd love to see how you made the coils.
I used a lathe with a horizontal feed rate as close to the wire diameter as I could get. I held the wire with a rag to maintain tension. I rested my hand on the tool post and manually guided the wire. I used the lowest spindle speed setting. Thanks for your comment.
Hi Jim, have you ever made a tesla coil, where the secondary is bifilar wound where the EM field cancels out?
No, I have not.
@@Jimscoolstuff I have a lot of questions I would like to ask you about tesla coils. Is there a way I can contact you? I’m a total noob and I don’t want to make any fatal mistakes. You seem to be an expert on the subject.
@@BrentLeVasseur Everything that I know about Tesla coils is shown in the video. Thanks for your comment.
@@Jimscoolstuff How did you wind your coils?
@@BrentLeVasseur I have a metal lathe that I used to turn the coil form while I placed the wire by hand. It is actually much easier than it sounds.
Awesome video, this is really cool stuff Jim. Thanks for sharing.
Hi Terry, Thanks for the nice comment. I just subscribed to your channel.
I have yours saved in my favorites. Thank you Jim.
agreed
Can you use a tesla coil as a ham radio antenna? Will it still shoot out sparks?
In the early days of radio, transmitters were actually spark gap type tesla coils. They were connected to antennas to radiate the energy.
Jim does have some cool stuff.
Thanks for your nice comment.
Your methods are very clear..
Thankyou for your nice comment.
agreed
good video . nice explanation
Thanks, Jim. Great info.
Thanks for your nice comment. Best regards.
agreed
Really needed this video 🔥
Thanks for your comment.
😃 grazie delle spiegazioni.
Thank you for your comment.
Does the pizza pan leak corona and if a needle is added to pan edge will an arc breakout to air?
There is no corona from the pizza pan because it has no sharp points. Corona from a sharp wire attached to the pizza pan is shown in the video.
@@Jimscoolstuff Thanks have a nice day. The snubber saves transistors picking the correct values works as shown the led gives indication when transistor has is close or hit collector voltage limit. There is another video same subject had the solution for transistor failure was to just stack them many as you want in parallel, over voltage failure can make even greater quantities of magic smoke until the power source is current limited out. The dreaded entire work station can go surge pulse mode damage to anything powered on joy joy... The frequency sweep method to find resonance with the top load variations give best way to give the eyes on real world changes to values for a part that has been created original as 1 of 1.Your description so far best. Thanks
@@lancemenke2728 Thankyou for your comment.
Very good video Jim 👍
Thankyou for the nice comment.
agreed
Great video!
Thanks for your nice comment.
Sir u really helped me💕.Tnx a lot
Thank you for your nice comment.
agreed
this is super cool!
Thanks for your super comment.
Great video
Thanks for your nice comment.
agreed
NIce vid！
Thanks for your nice comment.
agreed
Going to call you Sparky from now on. LOL
Thanks for your comment. Maybe Burnie would be a good name for me.
agreed
How old you man?
👍
Liked & sub'd
Thanks for your straight to the point comment.
agreed
Rubber shoes and straw brain
Pretty damn cool!
Thanks for your comment.