I have a large VDG and the first thing that failed was the solid state
speed control. Also I run all three of my Tesla coil RSG with a variac as
well as my VDG and never had a problem. Good luck and stay safe. Charles
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon>
Virus-free.
www.avast.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
On Sun, Feb 18, 2018 at 10:45 AM, doug <doug11642@xxxxxxxxxxx> wrote:
> Hi Derek & Bert, Got all things grounded, performance went off the charts,
> Very hot bolts to lower hemisphere, till the motor controller went to
> heaven, why did you have to mention
> "motor Controller"! Is it safe to run this monster through a Variac? [For
> the variac I mean]
> Doug
>
> -----Original Message----- From: ExtremeElectronics.co.uk
> Sent: Sunday, February 18, 2018 10:50 AM
>
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] VDG
>
> Doug,
>
> A pleasure,
>
> Earthing even a small VDG is a problem. I killed some electronics
> from mine purely because they shared a common earth. The impulse can be
> very large.
>
> I run mine from 12V as this removes some of the issues, but I still
> kill my motor controller from time to time with a good discharge.
>
> But maybe I shouldn't have tried to do the motor control with a
> microprocessor :)
>
> Derek
>
>
> On 18-Feb-18 14:14, doug wrote:
>
>> Hi Derek, Thanks for your advice! I will be putting a grounded power
>> cord on the VDG today, and I think it also may be wise to run it through a
>> line filter I built from a Diagram Bert sent me!
>> Doug J.
>>
>> -----Original Message----- From: Derek, Extreme Electronics
>> Sent: Saturday, February 17, 2018 4:08 PM
>> To: Tesla Coil Mailing List
>> Subject: Re: [TCML] VDG
>>
>> Doug,
>>
>> You must move some sort of ground, When a VDG strikes you can get
>> very large currents flowing especially in the loop of the discharge.
>> Ideally I would have a separate earth and not depend on the mains
>> wiring, else you can get spikes into other connected electrical powered
>> devices.
>>
>> It is also important that the discharge cannot not make a connection to
>> the supply, otherwise you may have a long spark backed by mains current.
>> An earthed box covering the mains powered items is vital to prevent this.
>>
>> Derek
>>
>> On 16/02/2018 19:32, doug wrote:
>>
>>> For those also interested in VanDeGraaffs a question
>>> This is a video of a VDG I just finished building, You will notice some
>>> strikes to the dimmer switch, would it be wise to use a 2 wire + ground for
>>> the AC hookup I have instead of the 2 wire only?
>>> Doug
>>>
>>> https://youtu.be/DlCD2jYjg2A
>>> _______________________________________________
>>> Tesla mailing list
>>> Tesla@xxxxxxxxxxxxxxxxxx
>>> https://www.pupman.com/mailman/listinfo/tesla
>>>
>>
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxxxxxxxxxx
>> https://www.pupman.com/mailman/listinfo/tesla
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxxxxxxxxxx
>> https://www.pupman.com/mailman/listinfo/tesla
>>
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla