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Re: power supply questions
Original poster: BunnyKiller <bunikllr-at-bellsouth-dot-net>
Tesla list wrote:
>Original poster: "Christoph Bohr" <cb-at-luebke-lands.de>
>I have two questions about changes I want to make to my power
>1st: I only have one variac to controll the main HV transformer.
>Currently I use it in standard configuration and additional
>inductive ballast to limit the current. By means of that I
>experience a lack of output voltage due to the voltage drop in
>the ballast / variac. Can one use the variac to controll the
>current ( in series ) WITHOUT using one to controll voltage?
>Would that give a voltage gain?
>2nd: I thought about using DC to feed my coil by rectifying the
>xformer output with a series setup of 1N4007 diodes under oil and
>charge a 30nF cap for cmoothing purposes. The main C1 would be
>60nF. Can this be done or has the smoothing cap to be bigger than
>tha primary cap?
>Any suggestions welcome
first off what size variac and what size transformer?
normally inductive ballast doesnt drop voltage but resistive will....
the problem with using a variac to control current is that when you get
close to 0 or 100% on the variac ( depending on how you use it ) the
current thru the variac gets too intence and it gets HOT ... an
inductive ballast set to maximum settings shuold be used and a varaic
is used to set the voltage...