Re: Rectification and asundry Shtuff.

Personally I've had no problems with using diodes rated at 1.5 times the
voltage. What I can say from experience is that equalizing resistors should
not be used. Older type HV diodes used to fail short circuit, but modern
diodes are avalanche devices and don't do this. Equalising resistors are
actually more likely to break down, they then arc and get hot and do all
manner of nasty things!!

----- Original Message -----
From: Tesla List <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, May 10, 2000 8:59 PM
Subject: Rectification and asundry Shtuff.

> Original Poster: "sundog" <sundog-at-timeship-dot-net>
> Hi all!  Got a for more questions for you all.
>    #1!!! BE CAREFUL!!!!  I got a burn this week from an unlikely source.
> was running a small coil on my desktop, and while it didn't zap me
> I got an RF burn on my hand from my deadman switch's casing.  Didn't
> it till later that night when my hand kept hurting.  It isn't horrible,
> it isn't pretty either.  So beware and be cautious of everything!  I
> even notice this happening!!!
>  What is the easiest (read cheap too!) way to rectify the output of an
> I surmise using diodes in sequence/parallel (MMD!), but what parts work
> for this?  I have only 1 microwave for, er, "Research", and it still
> so cannibalizing that is out.
>   And can I skimp on the voltage rating, or do I have to run it at 2x the
> NST voltage because of the non-polarized caps I'll be using?  Would it see
> more than the rated voltage on the reversal?
>   I know, I know, use a new spool for your coils.  If it breaks, unwind
> start over.  But i have a ton of dead TV's and monitors.  I grab the
> flybacks and the ferrite clamshells from the back of the tube.  Lots of
> wire on there.  How badly does it affect the working of the coil to join 2
> shorter lengths?  So far, I haven't had *many* problems.  Just a corona
> point from the joint after it's revarnished.  Hidden, if not solved with
> some "plasti-dip* for tool handles.  Anybody else have to do this?
>   I shoulda listened.  "don't use black PVC."  But the carbon-tracks *are*
> pretty!  And not to mention the racing sparks....Chalk that one up to the
> spark-gods.  But seeing how I wasn't out but 1 hour for winding, no
> etc, the 15 minutes (straight, mind you!), the 2"x6" coil performed *very*
> well up to destruction.  3" streamers, lots of ozone, and lots of noise,
> Yeah, baby!  Needless to say, the 4kv neon on the 17.2kv15nf bank didn't
> even get warm.  Terry F., you are *THE MMC MAN!!!*
>   But here's the strange thing I noticed running this coil...I got *no*
> interference on the TV in the house at all, and even the radio running on
> the same breaker and located just 10' had no static, hum or anything.  ???
> Normally I get a huge burst of trash when I use a spark gap for capacitive
> discharge stuff. But running solid, this coil made nuthin static or buzz.
> (this ins't the coil that burned me)
> Any help/suggestions/comments welcome
> Shad