Re: Qs on Using Modern TV Flybacks

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Brian" <ka1bbg@xxxxxxxxxxxxx>

Hi, why not wind a new pair of coils on the bare part of the core. no reason
why it wont work for you. cul brian f.
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, October 10, 2005 1:47 PM
Subject: Qs on Using Modern TV Flybacks


> Original poster: "Jeff Bullock" <jeff@xxxxxxxxxxxxx>
>
> Hi All,
>
> I'm new to this list.
>
> I've been researching Tesla coils for awhile, looking at other folks
> websites, etc. I'm interested in building a battery powered HV power
supply
> for an application which is very similar to TCs in its requirements. I
> haven't made one yet, but I may even try to build a portable TC that uses
> it. They look fun...in a dangerous sort of way :)
>
> Anyway, I'm particularly attracted to the HV supplies designs I've seen
that
> use a TV flyback transformer. I happen to have 4 that I salveged from two
> color TVs and two color CRTs.
>
> Problem is that they are not like the old ones described in most of the
> plans I've seen. They don't have an exposed primary on the opposite side
of
> the ferrite core, so you can't replace it with the two small coils shown
in
> schematics I've seen. They are the types that have two knobs on one side
for
> adjusting focus and screen (intensity?). One site does identify such as
the
> split diode type and says that the secondary coil is divided and that the
> output is already rectified to be DC.
>
> Now they do have an exposed core arm which one could use to add windings
to.
> But if this doesn't work out, one could use a 555 chip to chop the power
and
> feed it to the existing primary. I have no idea how to find the correct
> contacts to do so, however.
>
> Budget being limited, I would like to try to use thes coils that I have on
> hand for my experiments. Does anyone have experience with them or know
where
> I can find more details on using them to generate HV? The diode rectified
DC
> output would be fine for what I have in mind since I will be charging caps
> with it.
>
> Regards,
>
> Jeff
>
>
>
>