transformer quandary

To: tesla-at-pupman-dot-com
Subject: transformer quandary
From: ROBERT CRESSLER <59CREROB-at-menasha-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Wed, 02 Dec 1998 15:18:55 -0700
Approved: terryf-at-verinet-dot-com


     hello from rainy Portland!  here's my dilemma:
many years ago I picked up a power supply for a rf amp.the main
transformer must weight a 100lbs and is enclosed in a sealed metal case
that is about a cubic foot or so. 12x12x10 ...the primary is dual input 
        here's my best e-mail schematic:
141v     o------| |
115v     o------| |
com      o----- | |-----O
                | |              sec. 4800volts-at- 425ma with 115v on 115v
    
                | | --o         and 5780volts -at-350ma with 115v on the 141v   
                | |   c.t.       tap. center tapped
141v      o-----| |------O    
115v      o-----| |
com       o-----| |
                    
it also has a note saying the primary insulation is rated to 400v to ground
and the secondary is rated to 8000v to ground.

my questions: 
1) is the 5000v or so from the sec high enough for a tesla
   coil?  its seem I have heard the 7500v figure as a lower useful limit.
2) dual pri. input...... is this actually just a 230 volt feed or 
   two transformers effectively in parallel with the total 
   kva equal to the above? 
3) will a voltage amplifier help me out say a doubler or
   maybe a tripler ---(is unfiltered dc ok for tc use?)
4) can I just increase the primary input voltage? or use 
   combo of input tap like from 115/141 as input with 
   current limiting.......? 240 into one leg of the pri? 
5) will I need to have a PFC cap?  or two?

any and all suggestions will be appreciated .... thanks!!

 Robert Cressler 
 oregon city,ore.