1
« Last post by klugesmith on Today at 09:20:10 PM »
Applause for that video of sync-scope demonstration using benchtop frequency generators. Now back to Bob's oscilloscope screen capture with battery inverter output waveform. The annotation says trigger is on channel 1. See what happens with trigger set to Line, if that mode is available. Then when inverter output is close to 60 Hz, the difference from local AC grid frequency will be obvious. Here's an online blurb for the Ecarke inverter, which says 60 Hz with no tolerance given. 80 Hz would be pretty disappointing, but maybe it's got some self-oscillating drive circuit that would not be easy to take control of. https://www.amazon.com/Portable-Inverter-Ecarke-Converter-110V-120V/dp/B0CQ4Q6WB9?th=1
2
This is the first video in a series of 3, on how to get started with the UD3.1b Tesla coil driver, FiberNet and TeslaTerm. I love you all for the great work!
3
« Last post by Michelle_ on Today at 04:46:36 PM »
Great. I'm not saying 1/4 inch is wrong here but a few weeks back I buttoned up a small coil with primary current of ~200amps and 3/32" copper tubing. Worked great.
One disadvantage of having the connection and wire come out from the top makes secondary strikes to the primary more likely. Not only does it reduce the primary to topload distance it also introduces sharp edges rhat encourage flashover.
In my limited experience tesla coils are all about screwing up so be prepared...
Cheers.
I wonder if I can make the adjustable connection an insulated wire that runs on top of the primary and stays inside the groove but then keeps following the spiral to the outside then goes down through an exit hole at the end similar to how the beginning of the primary is run through a hole at the start of the spiral. Then I can always have the top covered but still open it to adjust it. The connector will be trickier to make but it should be possible with the 1/8 tube.
4
Great. I'm not saying 1/4 inch is wrong here but a few weeks back I buttoned up a small coil with primary current of ~200amps and 3/32" copper tubing. Worked great.
One disadvantage of having the connection and wire come out from the top makes secondary strikes to the primary more likely. Not only does it reduce the primary to topload distance it also introduces sharp edges rhat encourage flashover.
In my limited experience tesla coils are all about screwing up so be prepared...
Cheers.
5
« Last post by Bobakman on Today at 01:53:57 PM »
This video shows exactly what I am hoping to accomplish by rotation of the needle. I want to be able to rotate it in both directions Fast/Slow as in the video. He is using rather large oscillators in the video though. Bob <iframe width="321" height="570" src=" title="Synchroscope operation with Frequency change" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
6
« Last post by MRMILSTAR on Today at 05:24:19 AM »
I thought that you just wanted the ability to change the output needle position according to some user-adjustable control. For that case, the "John Freau phase shifter" may work because you only need an adjustable phase shift with a 60 Hz frequency. However, if you want to see the needle rotate then you need some small frequency adjustment as others have stated. And as others have stated, some sort of inverter with 120 volt output is probably the most logical way to do it. I have seen "true sine wave" inverters for sale but they aren't cheap. I'm not sure if a conventional PWM (square wave) output inverter will work. You would just have to try one. In either case, you would then need a way to slightly adjust the output frequency of the inverter since they are designed to be fixed at 60 Hz. Depending on the method used to generate the 60 Hz output perhaps you could possibly hack into the circuitry to provide a way to adjust the output frequency slightly. I am not hopeful of that because I think that the output frequency is tied directly to the input frequency.
If the meter will operate properly with a PWM output inverter, you could use a single phase of the 3-phase output of a VFD. These commonly provide a way for the user to adjust the output frequency with a knob, either built-in or externally supplied. 240 volt single phase input VFDs with 240 volt 3-phase output are commonly available. I use one to control my lathe. I can adjust the output frequency with a knob. There may be a 120 volt VFD available but I don't know. If this would work I have seen small cheap Chinese VFDs on E-Bay for less than $100.
7
Could we also say flybacks driven with ZVS are 50% slower in their pulsing rate as the diodes prevent HV output leading to spark the other way? This in comparison with a ferrite wound HV coil with two output leads. Such images were posted by Alberto a few messages above.
What Mads Banrkob taught us (big thanks for that dude!) flybacks give a fast positive sawtooth signal and pack their magnetic potential during other negative phasé in the air core. This positive is the only intense pulse it gives off and the other way we might gain a kiloVolt or so only negative potential.
8
« Last post by Michelle_ on Today at 04:20:35 AM »
Looks great.
I'd wonder about making contact to the primary ring for tuning. From the top you have to get down into that narrow canyon. From the bottom cutting holes...
Not a criticism just curious...
Cheers.
Yeah that's a good question, what I intend to do is basically make a metal P-clamp into a 90 degree connector that mates to an insulated wire using a 3d printed housing (if that makes any sense). I'll post it after I design it. I was going to drill through the bottom once tuning is established then cover the top. Also the grooves are big enough for 1/4" tubing but I was thinking about trying the 1/8" tubing first which will give me more room to make the insulated connector. It didn't seem to make a big difference in javaTC whether it was 1/8" or 1/4" and considering the relatively small amount of power I'm going to use and the skin effect, I am not convinced 1/8" will be too small but I don't know. I'm trying not to screw this up but this is the first tesla coil I've ever built unless you count the slayer exciter.
9
« Last post by Bobakman on Today at 04:05:28 AM »
Here is the waveform of my Dewalt Battery powered inverter the frequency in the image is 60HZ but it was actually bouncing around usually in the 80HZ range then back to 60HZ I guess frequency control or lack of is what it is in such an inexpensive device. Bob
10
Looks great.
I'd wonder about making contact to the primary ring for tuning. From the top you have to get down into that narrow canyon. From the bottom cutting holes...
Not a criticism just curious...
Cheers.
Recent Topics and Posts
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
klugesmith Today at 09:20:10 PM
|
|
Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Mads Barnkob Today at 07:22:26 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ Today at 04:46:36 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
alan sailer Today at 03:49:28 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman Today at 01:53:57 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
MRMILSTAR Today at 05:24:19 AM
|
|
Re: Difference between these transformers
[Transformer (Ferrite Core)]
|
Tesla Junior Today at 04:24:09 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ Today at 04:20:35 AM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman Today at 04:05:28 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
alan sailer Today at 04:03:54 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ Today at 03:19:19 AM
|
|
Re: IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni Today at 03:09:29 AM
|
|
Re: IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
unrealcrafter2 Today at 01:47:37 AM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman Today at 12:19:21 AM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
klugesmith April 18, 2024, 11:33:01 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman April 18, 2024, 11:15:15 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
davekni April 18, 2024, 10:59:36 PM
|
|
Re: What actually kills MOSFETs?
[Beginners]
|
unrealcrafter2 April 18, 2024, 10:03:48 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
klugesmith April 18, 2024, 09:53:25 PM
|
|
Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
|
unrealcrafter2 April 18, 2024, 09:50:09 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 18, 2024, 09:15:55 PM
|
|
Re: 100kHz CM300 gate resistor choice
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Mads Barnkob April 18, 2024, 08:50:49 PM
|
|
Re: 100kHz CM300 gate resistor choice
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
unrealcrafter2 April 18, 2024, 08:11:27 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
davekni April 18, 2024, 07:28:05 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman April 18, 2024, 06:30:30 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 18, 2024, 06:03:57 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 18, 2024, 05:26:13 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
NyaaX_X April 18, 2024, 04:03:38 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 18, 2024, 02:56:40 PM
|
|
Re: DIY induction guns? (warning:long)
[Induction Launchers, Coil Guns and Rails guns]
|
Benbmw April 18, 2024, 06:17:15 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 18, 2024, 05:46:07 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
MRMILSTAR April 18, 2024, 05:18:31 AM
|
|
Re: IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni April 18, 2024, 04:34:52 AM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
klugesmith April 18, 2024, 04:11:53 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 18, 2024, 04:02:44 AM
|
|
Re: 100kHz CM300 gate resistor choice
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni April 18, 2024, 03:35:52 AM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
MRMILSTAR April 17, 2024, 11:54:05 PM
|
|
100kHz CM300 gate resistor choice
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Benjamin Lockhart April 17, 2024, 11:37:16 PM
|
|
Re: Has anyone tried to build a TMT (extra coil) Tesla coil?
[General Chat]
|
Michelle_ April 17, 2024, 02:29:30 AM
|
|
Re: Has anyone tried to build a TMT (extra coil) Tesla coil?
[General Chat]
|
MRMILSTAR April 16, 2024, 11:56:12 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
klugesmith April 16, 2024, 11:46:57 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman April 16, 2024, 10:40:11 PM
|
|
Has anyone tried to build a TMT (extra coil) Tesla coil?
[General Chat]
|
Michelle_ April 16, 2024, 09:21:39 PM
|
|
Re: Medium Drsstc question
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
flyingperson23 April 16, 2024, 08:04:16 PM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Benjamin Lockhart April 16, 2024, 06:48:05 PM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 16, 2024, 06:18:40 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 16, 2024, 06:14:53 PM
|
|
Re: 3D printed mini-slayer: world's weakest tesla coil
[Solid State Tesla Coils (SSTC)]
|
unrealcrafter2 April 16, 2024, 05:44:44 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
MRMILSTAR April 16, 2024, 03:12:12 PM
|
|
Re: Drsstc voltage spike question
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
unrealcrafter2 April 16, 2024, 02:28:01 PM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Saattvik24 April 16, 2024, 01:56:26 PM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 16, 2024, 06:50:47 AM
|
|
Re: IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Anders Mikkelsen April 16, 2024, 04:57:47 AM
|
|
Re: IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
ethanwu0131 April 16, 2024, 03:40:53 AM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
flyingperson23 April 16, 2024, 01:31:17 AM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 15, 2024, 11:19:52 PM
|
|
3D printed mini-slayer: world's weakest tesla coil
[Solid State Tesla Coils (SSTC)]
|
Michelle_ April 15, 2024, 11:10:19 PM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
alan sailer April 15, 2024, 11:04:19 PM
|
|
Re: Ignitron trigger drive ideas?
[Capacitor Banks]
|
Twospoons April 15, 2024, 11:02:05 PM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 15, 2024, 10:57:59 PM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 15, 2024, 10:55:46 PM
|
|
Re: Return of Electronics Flea Market in "Silicon Valley"
[Sell / Buy / Trade]
|
klugesmith April 15, 2024, 10:37:32 PM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Saattvik24 April 15, 2024, 10:05:00 PM
|
|
Re: How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
MRMILSTAR April 15, 2024, 09:28:50 PM
|
|
Ignitron trigger drive ideas?
[Capacitor Banks]
|
klugesmith April 15, 2024, 09:06:42 PM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Mads Barnkob April 15, 2024, 08:46:32 PM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Benbmw April 15, 2024, 08:38:39 PM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
sky-guided April 15, 2024, 08:23:40 PM
|
|
How to get a GE Yokogawa AB40 Sync Scope to rotate without a powerplant.
[Laboratories, Equipment and Tools]
|
Bobakman April 15, 2024, 06:43:23 PM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
flyingperson23 April 15, 2024, 06:29:10 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 15, 2024, 05:21:53 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 15, 2024, 05:15:33 AM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni April 15, 2024, 04:07:54 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
davekni April 15, 2024, 03:49:03 AM
|
|
Re: Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
alan sailer April 14, 2024, 09:46:30 PM
|
|
Small-ish 3D printed SGTC via cheap ZVS flyback build, humbly asking a couple ?s
[Spark Gap Tesla Coils (SGTC)]
|
Michelle_ April 14, 2024, 07:31:00 PM
|
|
Re: First DRSSTC SKM100
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Saattvik24 April 14, 2024, 02:26:19 PM
|
|
Re: mg75q2ys40 IGBT
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Mads Barnkob April 14, 2024, 07:20:54 AM
|
|
Re: IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Mads Barnkob April 14, 2024, 07:18:20 AM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 13, 2024, 06:46:40 AM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 13, 2024, 04:18:42 AM
|
|
Re: Upper and Lower Explosive Limits on Confined Flammable Vapors at -79 C.
[General Chat]
|
alan sailer April 13, 2024, 03:24:20 AM
|
|
Re: Game changing tesla coil secondary winding suggestions
[General Chat]
|
alan sailer April 13, 2024, 03:20:46 AM
|
|
Game changing tesla coil secondary winding suggestions
[General Chat]
|
Michelle_ April 13, 2024, 03:13:22 AM
|
|
Re: Capacitor Blowout
[Sell / Buy / Trade]
|
lbattraw April 12, 2024, 09:14:58 PM
|
|
mg75q2ys40 IGBT
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
thedark April 12, 2024, 08:40:18 PM
|
|
Re: UD 2.7 OCD LED stays on, no output during inital test
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni April 12, 2024, 07:20:30 PM
|
|
Re: Mosfet Buffer Stage Questions
[Beginners]
|
davekni April 12, 2024, 07:12:43 PM
|
|
IKY150N65EH7, is it good for DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
ethanwu0131 April 12, 2024, 04:47:33 PM
|
|
Re: UD 2.7 OCD LED stays on, no output during inital test
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Admiral Aaron Ravensdale April 12, 2024, 11:43:36 AM
|
|
Mosfet Buffer Stage Questions
[Beginners]
|
Egg April 12, 2024, 12:49:02 AM
|
|
Re: UD 2.7 OCD LED stays on, no output during inital test
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni April 12, 2024, 12:41:16 AM
|
|
Re: Plasma Torid - Class E Self Resonant Dual/Stereo - Plasma Torid Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
davekni April 12, 2024, 12:22:41 AM
|
|
Re: Capacitor Blowout
[Sell / Buy / Trade]
|
Michelle_ April 11, 2024, 10:45:53 PM
|
|
Re: UD 2.7 OCD LED stays on, no output during inital test
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Admiral Aaron Ravensdale April 11, 2024, 07:39:30 PM
|
|
Re: UD 2.7 OCD LED stays on, no output during inital test
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
flyingperson23 April 11, 2024, 07:24:52 PM
|
|
Re: Tesla coil safety questions, risk analysis quantified
[Beginners]
|
sky-guided April 11, 2024, 06:09:30 PM
|
|
UD 2.7 OCD LED stays on, no output during inital test
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
Admiral Aaron Ravensdale April 11, 2024, 12:55:16 PM
|
|
Re: Plasma Torid - Class E Self Resonant Dual/Stereo - Plasma Torid Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
alan sailer April 11, 2024, 03:40:00 AM
|
|
Re: Plasma Torid - Class E Self Resonant Dual/Stereo - Plasma Torid Build
[Dual Resonant Solid State Tesla coils (DRSSTC)]
|
sky-guided April 11, 2024, 03:05:07 AM
|
|