Author Topic: Where to buy DIY or home made capacitor book(s)?  (Read 630 times)

Offline HVuser

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Where to buy DIY or home made capacitor book(s)?
« on: October 19, 2021, 08:49:17 PM »
After looking at the prices of MMC and used high voltage capacitors I feel it will be more affordable to make my own capacitors. I have seen videos online in the past on how to build HV capacitors although I want to buy a book. Normally I would turned to Lindsay technical books but that company does not have many books anymore. Does anyone know a good book on how to build DIY or home made capacitors?
« Last Edit: October 20, 2021, 03:58:52 AM by HVuser »

Offline MRMILSTAR

  • High Voltage Engineer
  • ****
  • Posts: 372
  • Karma: +12/-0
  • Cedar Rapids, Iowa
    • View Profile
Re: Where to buy DIY or home make capacitor book(s)?
« Reply #1 on: October 19, 2021, 10:27:41 PM »
Capacitors for Tesla coil primary circuits are usually the most expensive and difficult to obtain part of a Tesla coil. I haven't attempted to make any myself but I can report that many have tried and seldom had success for any length of time. They usually fail after a short period. Unfortunately I don't know of any inexpensive methods for obtaining a reliable Tesla coil capacitor bank. I am not aware of any books either.
Steve White
Cedar Rapids, Iowa
Retired electrical engineer

Offline HVuser

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Re: Where to buy DIY or home make capacitor book(s)?
« Reply #2 on: October 20, 2021, 03:58:29 AM »
I feel we have to have some modern books on the subject as I have found many books on what capacitors are, how to use them, and theory of operation. I know it is possible that companies could claim manufacturing of capacitors as proprietary information. I have seen home made capacitors fail on YouTube causing all sort of problems. I appreciate the information.  I will have to give it more thought and weigh the benefits/drawbacks.
« Last Edit: October 20, 2021, 04:13:11 AM by HVuser »

Offline davekni

  • High Voltage Expert
  • ******
  • Posts: 1439
  • Karma: +70/-0
  • Physicist, engineer (electronic), and hobbiest
    • View Profile
Re: Where to buy DIY or home made capacitor book(s)?
« Reply #3 on: October 20, 2021, 05:45:27 AM »
My experience with home-made HV capacitors comes down to two key issues.  One is creepage - arcs forming along insulation surfaces around from one electrode to the other.  Second is more difficult, corona in any tiny air space eventually breaks down neighboring plastic insulation.

Both issues could be mitigated by running the capacitor in an oil bath (with proper trapped-air removal).  Too much trouble and mess for me.
David Knierim

Offline HVuser

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Re: Where to buy DIY or home made capacitor book(s)?
« Reply #4 on: October 21, 2021, 11:15:28 PM »
You bring up some good points. I will still try home made capacitors if I can find some Mylar or Melinex film.  I appreciate the information.

Offline davekni

  • High Voltage Expert
  • ******
  • Posts: 1439
  • Karma: +70/-0
  • Physicist, engineer (electronic), and hobbiest
    • View Profile
Re: Where to buy DIY or home made capacitor book(s)?
« Reply #5 on: October 22, 2021, 04:27:13 AM »
Mylar and Melinex are brand names for polyester.  It is a great dielectric for DC use, but too lossy for AC.  MMCs are almost always made with PP (polypropylene) dielectric caps, with very-low dielectric loss.  Polyethylene film is much easier to buy and also low-loss, although temperature is even more limited than for PP.
David Knierim

Offline Twospoons

  • High Voltage Technician
  • ***
  • Posts: 117
  • Karma: +2/-0
    • View Profile
Re: Where to buy DIY or home made capacitor book(s)?
« Reply #6 on: October 22, 2021, 05:04:51 AM »
Note: for high voltage its better to use several thin layers of dielectric than one thick one. This because if there's a defect in the film at one point it will most likely not be next to a defect in the adjacent layer, so you are far less likely to have a defect driven failure of the capacitor.
Its also easier to roll.

Years ago I bought a big roll of kraft paper, for a big paper-in-oil capacitor. But like so many ideas, it got shelved. I have a garage full of half completed projects.

Offline huntergroundmind

  • High Voltage Enthusiast
  • *
  • Posts: 5
  • Karma: +1/-0
    • View Profile
    • Huntergroundmind
Re: Where to buy DIY or home made capacitor book(s)?
« Reply #7 on: November 28, 2021, 01:58:12 AM »
I have mixed feelings about making DIY capacitors. I number of them, and concluded that it is actually hard to do an realible capacitor. Long ago I did "sandwitch" style capacitors for my first Tesla coils. Because of lack of impregnation they failed due to corona eating out garden PVC foil. After I noticed that I applied edible oil between aluminium, and dielectric foils during assembly, and it worked for some time of operation. More recently I made capacitors from... old capactitors. I rewound old windings from dead pfc capacitor to form smaller capacitors, and connected them in series to get demanded voltage rating. Later I vacuum impregnated them in oil. It worked for some time In primary circuit of some sort of tesla coil, and It failed after some time ( most probably due to bridging of impurities in oil in one capacitor, after that sequential failure of other caps happened ).  Microwave oven capacitors also are good source of ready made  dielectric material(mylar and paper), and aluminium foil stacked together. I made some capacitors for CW stack dry, wax impregnated) by rewinding them, and "converted" one MOC to low inductance one by adding more outgoing foils on lenght of winding, and connecting them in parallel. Then vacuum impregnated it in transformer oil.
Cleanliness is a key. Any dirt, especially harder kinds (such as sand, or metal fillings for worst) that fall into capacitor during winding of foil cause problems (punctures, and being sharp points engancing electric field if conductive). Also better filter your oil before you fill container of capacitor.

High Voltage Forum

Re: Where to buy DIY or home made capacitor book(s)?
« Reply #7 on: November 28, 2021, 01:58:12 AM »

 


* Recent Topics and Posts

post 120VAC Mains Ramped Builds
[Solid State Tesla Coils (SSTC)]
Magneticitist
Today at 03:00:04 AM
post Re: Muon Decay
[Detection, Counting and Measurements]
alan sailer
Today at 02:16:57 AM
post Re: Help on my "first" SSTC (LabCoatz SSTC 2.0)- Popping transistors
[Solid State Tesla Coils (SSTC)]
TiagoBS
January 20, 2022, 06:56:35 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
Da_Stier
January 20, 2022, 05:19:26 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
alan sailer
January 20, 2022, 03:53:54 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
Uspring
January 20, 2022, 01:20:19 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
Da_Stier
January 20, 2022, 10:11:21 AM
post Re: Muon Decay
[Detection, Counting and Measurements]
alan sailer
January 19, 2022, 08:22:49 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
Mads Barnkob
January 19, 2022, 06:49:36 PM
post Re: Etching PCBs with a SLA 3d printer
[Printed Circuit Board]
hardboiled99
January 19, 2022, 07:37:27 AM
post Primary Coil Winding Technique
[Solid State Tesla Coils (SSTC)]
alan sailer
January 18, 2022, 10:34:48 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
alan sailer
January 18, 2022, 08:46:53 PM
post Re: Muon Decay
[Detection, Counting and Measurements]
Mads Barnkob
January 18, 2022, 08:08:53 PM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
ZakW
January 18, 2022, 07:15:22 PM
post Muon Decay
[Detection, Counting and Measurements]
alan sailer
January 18, 2022, 06:49:48 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 18, 2022, 08:47:53 AM
post Re: QO-100 / EShail 2 Uplink amplifier development adventures
[Radio Frequency]
Da_Stier
January 17, 2022, 09:13:32 PM
post Re: QO-100 / EShail 2 Uplink amplifier development adventures
[Radio Frequency]
Da_Stier
January 17, 2022, 09:05:56 PM
post Re: Help on my "first" SSTC (LabCoatz SSTC 2.0)- Popping transistors
[Solid State Tesla Coils (SSTC)]
Mads Barnkob
January 17, 2022, 07:45:48 PM
post Re: General Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
January 17, 2022, 07:41:34 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
Mads Barnkob
January 17, 2022, 07:38:25 PM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
Mads Barnkob
January 17, 2022, 07:31:03 PM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
Mads Barnkob
January 17, 2022, 07:28:02 PM
post Re: Induction heater Driver for Flyback?
[Voltage Multipliers]
MRMILSTAR
January 16, 2022, 09:00:02 PM
post Induction heater Driver for Flyback?
[Voltage Multipliers]
abstruse1
January 16, 2022, 07:35:26 PM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
Bambinz
January 16, 2022, 12:21:40 PM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
davekni
January 15, 2022, 07:10:03 PM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
Bambinz
January 15, 2022, 06:31:33 PM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
Magneticitist
January 14, 2022, 08:47:43 PM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
davekni
January 14, 2022, 08:39:07 PM
post Re: Unusual Youtube channel activity
[General Chat]
davekni
January 14, 2022, 08:14:17 PM
post Re: Unusual Youtube channel activity
[General Chat]
Mads Barnkob
January 14, 2022, 08:12:13 PM
post Unusual Youtube channel activity
[General Chat]
MRMILSTAR
January 14, 2022, 05:51:52 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 14, 2022, 08:51:57 AM
post Re: SSTC with push-pull configuration
[Solid State Tesla Coils (SSTC)]
Bambinz
January 13, 2022, 08:20:02 PM
post Re: Help with SSTC feedback circuits with 4046 IC and Schmitt Triggers
[Solid State Tesla Coils (SSTC)]
davekni
January 13, 2022, 05:27:40 AM
post Re: General Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
thedoc298
January 13, 2022, 03:10:32 AM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 12, 2022, 06:18:15 PM
post Re: Single mosfet bifiliar gdt
[Solid State Tesla Coils (SSTC)]
alan sailer
January 12, 2022, 05:45:26 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
MRMILSTAR
January 12, 2022, 03:29:04 PM
post Re: Help with SSTC feedback circuits with 4046 IC and Schmitt Triggers
[Solid State Tesla Coils (SSTC)]
AFreshLad
January 12, 2022, 01:30:38 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 12, 2022, 09:09:13 AM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
MRMILSTAR
January 11, 2022, 08:05:27 PM
post Re: Nokia Siemens 3G Flexi 2100MHz 50W Amplifier Teardown
[Radio Frequency]
Mads Barnkob
January 11, 2022, 07:42:12 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
Duane B
January 11, 2022, 07:33:15 PM
post Re: 8x MOT transformer, weird power draw
[Transformer (Iron Core)]
AstRii
January 11, 2022, 06:19:49 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 11, 2022, 05:19:46 PM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
MRMILSTAR
January 11, 2022, 04:31:28 PM
post Re: 8x MOT transformer, weird power draw
[Transformer (Iron Core)]
AstRii
January 11, 2022, 03:21:37 PM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
davekni
January 11, 2022, 06:50:49 AM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
Duane B
January 11, 2022, 06:34:20 AM
post Re: Help on my "first" SSTC (LabCoatz SSTC 2.0)- Popping transistors
[Solid State Tesla Coils (SSTC)]
davekni
January 11, 2022, 06:24:13 AM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
davekni
January 11, 2022, 06:15:08 AM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
MRMILSTAR
January 11, 2022, 05:25:31 AM
post Re: Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
Duane B
January 11, 2022, 12:07:22 AM
post Strange reading for grid feedback coil voltage
[Vacuum Tube Tesla Coils (VTTC)]
MRMILSTAR
January 10, 2022, 10:56:48 PM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
Duane B
January 10, 2022, 09:38:53 PM
post Re: Help on my "first" SSTC (LabCoatz SSTC 2.0)- Popping transistors
[Solid State Tesla Coils (SSTC)]
ZakW
January 10, 2022, 07:50:13 PM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
ZakW
January 10, 2022, 07:19:17 PM
post Re: Help on my "first" SSTC (LabCoatz SSTC 2.0)- Popping transistors
[Solid State Tesla Coils (SSTC)]
TiagoBS
January 10, 2022, 03:13:08 PM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
davekni
January 10, 2022, 04:21:46 AM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 10, 2022, 03:59:09 AM
post Re: 8x MOT transformer, weird power draw
[Transformer (Iron Core)]
davekni
January 10, 2022, 03:54:59 AM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
ZakW
January 09, 2022, 11:45:09 PM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
jpvvv123
January 09, 2022, 11:04:25 PM
post 8x MOT transformer, weird power draw
[Transformer (Iron Core)]
AstRii
January 09, 2022, 04:22:11 PM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
Duane B
January 09, 2022, 05:52:11 AM
post Re: GDT Testing
[Solid State Tesla Coils (SSTC)]
davekni
January 09, 2022, 05:10:50 AM
post Re: Performance issues regarding phase angle in SSTCs
[Solid State Tesla Coils (SSTC)]
davekni
January 09, 2022, 01:20:40 AM
post GDT Testing
[Solid State Tesla Coils (SSTC)]
ZakW
January 09, 2022, 12:38:28 AM
post Re: General Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
January 08, 2022, 06:36:28 PM
post Performance issues regarding phase angle in SSTCs
[Solid State Tesla Coils (SSTC)]
Max Seiringer
January 08, 2022, 03:21:31 PM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 08, 2022, 09:05:41 AM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
jpvvv123
January 07, 2022, 10:20:10 PM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
304er
January 07, 2022, 05:56:28 PM
post Re: First SSTC based on profdc9 PCB Pack
[Solid State Tesla Coils (SSTC)]
davekni
January 07, 2022, 05:15:38 AM
post Re: DRSSTC tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
January 07, 2022, 05:01:21 AM
post Re: How to prevent secondary to secondary to primary arcs?
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
January 07, 2022, 04:59:59 AM
post Tophat QCW 1
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dbach
January 07, 2022, 02:27:35 AM
post How to prevent secondary to secondary to primary arcs?
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dbach
January 07, 2022, 02:19:40 AM
post Re: General Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
January 06, 2022, 09:33:06 PM
post Re: First SSTC based on profdc9 PCB Pack
[Solid State Tesla Coils (SSTC)]
alan sailer
January 06, 2022, 06:09:39 PM
post Re: DRSSTC tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
kubajed
January 06, 2022, 04:48:22 PM
post Re: First SSTC based on profdc9 PCB Pack
[Solid State Tesla Coils (SSTC)]
SK1701
January 06, 2022, 03:05:55 PM
post Re: General Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
January 06, 2022, 08:17:09 AM
post General Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
January 06, 2022, 04:42:25 AM
post Re: Hi! 811 A tesa coil
[Vacuum Tube Tesla Coils (VTTC)]
jpvvv123
January 06, 2022, 03:40:43 AM
post Re: First SSTC based on profdc9 PCB Pack
[Solid State Tesla Coils (SSTC)]
alan sailer
January 06, 2022, 12:18:38 AM
post First SSTC based on profdc9 PCB Pack
[Solid State Tesla Coils (SSTC)]
SK1701
January 05, 2022, 08:37:13 PM
post Re: Bus Supply Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Hydron
January 04, 2022, 05:58:10 PM
post Re: Bus Supply Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
January 04, 2022, 01:37:02 PM
post Bus Supply Questions
[Dual Resonant Solid State Tesla coils (DRSSTC)]
flyingperson23
January 04, 2022, 04:12:34 AM
post Re: ZVS Driven Teslacoil
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Andrew321
January 04, 2022, 01:14:26 AM
post WTS: small secondary coils
[Sell / Buy / Trade]
dbach
January 03, 2022, 05:38:08 PM
post Re: 60hz synchronous motor on 50hz?
[Spark Gap Tesla Coils (SGTC)]
klugesmith
January 02, 2022, 01:17:37 AM
post Re: 60hz synchronous motor on 50hz?
[Spark Gap Tesla Coils (SGTC)]
paulj
January 01, 2022, 06:53:46 PM
post Re: Single mosfet bifiliar gdt
[Solid State Tesla Coils (SSTC)]
MHV
January 01, 2022, 06:39:05 PM
post DC powered coil. best topology?
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rafft
January 01, 2022, 02:05:43 PM
post Re: Full Bridge SSTC
[Solid State Tesla Coils (SSTC)]
Rafft
January 01, 2022, 11:54:25 AM
post Re: 60hz synchronous motor on 50hz?
[Spark Gap Tesla Coils (SGTC)]
klugesmith
December 31, 2021, 09:50:59 PM

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 
SimplePortal 2.3.6 © 2008-2014, SimplePortal