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Re: [TCML] VDG pickups (was Ignition coil driver)

Doug,
    So the film is actually touching the belt?
If so, then you are adding another place for charge separation, as well as collection. Any idea where on the tribo electric scale the conductive film sits? 
Would that account for the extra current ?

    Derek


On 22-Dec-15 10:55 PM, doug wrote:
Hi Derek; What you see is conductive plastic film riding on the rollers attached with copper tape, rollers are PVC and aluminum tape covered acrylic. I did do comparisons, plastic film produced 30% more current. Belt Is neoprene. 
Doug
-----Original Message----- From: ExtremeElectronics.co.uk
Sent: Tuesday, December 22, 2015 4:52 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] VDG pickups (was Ignition coil driver)

Doug,
    From what I can see from the videos, you are using a thin piece of
copper for your pickup. Have you done any comparison between that, wires
or gauze. Do you see an increase in current or voltage ?
    What is the composition of your rollers and belt ?

    Derek

On 22-Dec-15 2:34 PM, doug wrote:

Hello Derek;
Thank you for your comments and including a link to my youtube video. I have included a link to my youtube page so you can take a look at some of my VanDeGraaff projects. I think all VDG builders are using the wire or screen type pickups on their VDG’s, I have found something MUCH better. You can see it in operation in some of my videos. 
https://www.youtube.com/user/dr043042#p/u
https://www.youtube.com/watch?v=YCWAH-J091c
https://www.youtube.com/watch?v=uoS7sOy2Src

Thank you again, Doug J.

-----Original Message----- From: ExtremeElectronics.co.uk
Sent: Friday, December 18, 2015 11:35 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Ignition coil driver

You can get about 300W from 8 of them though..

http://www.extremeelectronics.co.uk/electronic/v8-tesla-engine/

    Derek



On 18-Dec-15 2:30 PM, Jim Lux wrote:

On 12/18/15 4:39 AM, doug wrote:
Hello; I am looking for some information concerning Ignition coil HV supplies. I am using 120V mains through a light dimmer and wonder if there is something better and more robust than the dimmer? This Ignition coil HV supply will be a dual coil setup using a 25.0uf/370VAC motor run Cap. 





Not as cheap..
any of the standard capacitor discharge electronic ignitions basically put 400V pulses into the coil to generate HV. 

6000 RPM in a 8 cylinder engine is 200 Hz

typical energy per "pulse" is 100 mJ so 200 Hz is 20 W


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