Flyback Coil system

To: tesla-at-pupman-dot-com
Subject: Flyback Coil system
From: "Coiler" <mycroft-at-access1-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Wed, 25 Nov 1998 11:10:19 -0700
Approved: terryf-at-verinet-dot-com


I admit to my lack of knowledge when it comes to these systems, but I
thought
it would be fun to build one, since I found myself with a flyback from
an old CGA monitor that was lying around the shop. (most now on its
way to the landfill)
So I build the (in)famous 3055 based flyback driver, and it works just
fine - getting 3/4" solid arc (corona out to about 1"). The problem
is that the 3055s are getting *HOT* as is the 3A bridge that is feeding
the circut. I am hoping that there is some error in design. (if not,
I already have good sized heatsinks on the 3055s, I'll just add a fan
to the mix.)

In addition to a request to check the below circut, some questions:
Should this be able to turn a standard bulb into a 'Plasma globe',
or is this too low a power?

Should it be holding a charge after power off (I get little snaps and
sparks for bit.)

I'll have to describe the circut, I hope I get it clear enough - as ascii
art
sucks.

Out of the bridge/filter (8000uf filter cap) I have:
27ohm resistor  between (-) and the center tap of the feedback winding.
Continue on to a 270 ohm resistor that goes to the centertap of the
primary, and then back to the (+) side of the supply. Emitters to (-).
Collectors to each side of the primary winding. Bases to each side of
the feedback winding.  Primary winding is 10 turns CT, feedback 4 turns
CT.

Sorry to be asking so many questions, but inquirings minds (mine) want to
know:)
Thanks!

Michael Baumann
Coiler, Homebrewer, Nerd. mycroft-at-access1-dot-net