Re: DC coil without the voltage doubler resoance charge inductor?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

Mark,
I think I will follow your advice and start out using MOT's for the 
charging reactor. I have 9 MOT's on hand and easy access to as many as I 
want. Almost all of the MOT's are as you describe, however, I have run 
across a couple removed from commercial grade microwaves that have a 
substantially larger secondary, ala the one marked 4000V. Thanks for the 
offer on the math. I think I have a handle on it. I have been studying 
Richie's site diligently. Richie deserves a GOLD MEDAL for creating and 
maintaining that site!!! Later.
Paul
Think Positive

----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Friday, May 06, 2005 2:18 PM
Subject: RE: DC coil without the voltage doubler resoance charge inductor?

> Original poster: "Mark Dunn" <<mailto:mdunn@xxxxxxxxxxxx>mdunn@xxxxxxxxxxxx>
>
>
> Paul:
>
> I would not risk ruining a pricey NST even if it had the correct
> Inductance.  MOT's are free(If your not to proud to dumpster dive).  My
> MOT charging reactor set-up ran for many hours before the inductance
> began to drop due to corona and insulation breakdown within the MOT
> secondary windings.  Be sure the MOT cores are well insulated from
> ground(mount on polycarbonate or other sheet).  You need to disconnect
> the ground side of the MOT secondary from the core as we have previously
> discussed.
>
> I have found that near all the MOT's I have messed with have ~100 turn
> primaries and ~2000 turn secondaries.  The secondaries are typically #26
> gauge.  Typically, each MOT secondary has ~15 Henries inductance so you
> need a few to get what you need.  I needed 30H thus (2) for my coil.
>
> Once you get your coil working, you can come up with a longer term
> solution if you want to take your project to a higher level.
>
> You need a bit of math to figure out the correct charging reactor size
> for your coil system.  Let me know if you need help on that.  Richie
> Burnett's site covers the math very well.
>
> Mark
>
>
>
>
>
>
> Original poster: "Paul B. Brodie" 
<<mailto:pbbrodie@xxxxxxxxxxxxx>pbbrodie@xxxxxxxxxxxxx>
>
> Mark,
> I have been considering duplicating your DC resonant charging
> configuration
> and have most of the parts required minus the charging reactor. I was
> considering using the secondary of a 15kV NST for this but after reading
>
> about your experience with the MOT secondary burning out, I have second
> thoughts. I do realize that the NST secondary is designed for 15kV vs.
> the
> 2000kV of a MOT. What is your opinion about this idea? Thanks. Paul PS
> Your previous emails and your web site have been extremely helpful.
> Thanks again.
>
>