Re: GETTING CLOSER!

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Esondrmn-at-aol-dot-com>

In a message dated 2/21/01 4:24:16 PM Pacific Standard Time, tesla-at-pupman-dot-com 
writes:

<< Matt,
 
 I will be tapping the primary using "Tap Splices".  They are like clips that
 slide over the insulation and snap into place.  A sharp conductor that makes
 contact with the wire  is forced through the insulation during the snapping
 process.  Any supply house should have them.  I will only be running one
 tranny off the variac at a time (at first).  I have the variac over fused on
 a recommendation I received off the list from a fellow coiler who, like
 myself, has an interest in getting as much power out of things as possible.
 I like having a small variac and the ability to give my tranny a boost for
 short runs. Its power output rating is 543.75 W.  I figure one NST will draw
 360 W.  No problem with that set up, the ten amp fuse is for when I will
 inevitably go for the two NST's in parallel.  I have the equipment to run my
 coil with 4 different configurations.  Although I haven't done any of them,
 this is my plan.
 1) Single tranny no boost
 2) Single tranny with variac boost
 3) Dual matched paralled tranneys no boost
 4) Dual matched paralled tranneys with variac boost
 For the final configuration, I am only squeezing an additional 176.25 W out
 of my variac.  I have been advised that I should be able to fuse it at 10
 amps for short runs.  Having read your reply I think I will change my fuse
 rating to 3 amps (435 W) on configuration 2, and 5 amps (725W) for
 configuration 4.
 
 
 
 Thanks,
 --Nate
  >>
Nate,

Since you are going to be running very close to, or over, the rating on the 
variac, I would make sure to use power factor correction caps on the 
transformers to get the input current down as low as possible.

Ed Sonderman