[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: solid state nst?
Original poster: "Neal Namowicz" <mr_neal@xxxxxxxxxxxx>
Hello, all, I'm still a little new to this list, and realized I
responded previously
with the wrong email address. ANYway,,,
Your little ballast sounds very similar to the type I use at work,
for the metal
halide fixtures in the high ceiling of the church. 110vac in, and
according to the
label, 4kv pulsed output. Like yours, the whole works are potted inside, in a
"white tar" -like substance. It kind of peaked my interest, too,
except that I don't
know what effect that "pulsed" output would have on an HV project. Not only
that, but these have a built-in circuit breaker that will shut it off
in the event of
a direct short on the outputs. Not very convenient for "other" uses.
Neal.
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, January 12, 2006 6:36 PM
Subject: Re: solid state nst?
Original poster: Frosty <frosty90@xxxxxxxxx>
first of all, yhanks for your help, but i dont think it is a
fluorescent lamp inverter. the lable on the top says "neon gas lamp
power supply" and specifies the output current and voltage (6000v
and 30mA), but the arc is a fairly faint hazy purple one. it also
produces a 50Hz buzz. i think it may be an electronic neon supply??
the arc breaks up into a sort of 'banjo effect' (similar to a
flyback arc) when you blow on it so it probably is a high frequency thing.
it is very hard to open,(ive tried a chisel, a screwdriver and a
hacksaw) it seems to be potted in some sort of hard plastic and the
case seems like a completely sealed solid thing. its about 10cm l by
5cm w and 3cm h.
Thanks
Frosty
On 1/13/06, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: "Qndre Qndre"
<<mailto:qndre_encrypt@xxxxxxxxxxx>qndre_encrypt@xxxxxxxxxxx>
Hey Frosty,
sounds like it is a fluorescent lamp inverter similar to those used
in a TFT display to power the backlight CCFLs. They are not much more
than an LC-circuit driven by a push-pull converter. They are usually
producing low voltage at relatively high frequencies. They have a
continuous wave output voltage of about 100 Volts at their own
resonant frequencies which is usually 50 kiloHertz. These inverters
are useless for conventional Tesla-Coiling because of their low
voltage and their high frequency.
There is a simple way to find out whether your device is such a
fluorescent lamp inverter. Connect two wires to the output where the
tube is usually wired to. Power up the device and move the other
(exposed) ends of the wire towards each other. If they are close
enough to each other you should get an arc between them. Now remove
the wires from each other stretching the spark but not quenching it.
If the spark is not very bright but only a faint violet glow in the
air and the sound is a high-pitch hissing noise then it is a
fluorescent lamp inverter. If you hear 50/60 Hz mains frequency from
the arc, then it's most likely an NST. Be careful while figuring out
whether it's an NST or a flourescent lamp inverter since in case it
is a true NST the high-voltage mains-frequency output is NOT (!!)
harmless at all.
Stuff described above all applies to the fluorescent lamp inverters
used in TFT displays or scanners to power the CCFLs. Are you sure
yours is delivering 6000 Volts? This sounds way too high for such a
fluorescent lamp inverter. So if this is true your inverter cannot be
like these used in TFTs for the backlight. Maybe you should just open
it's case so see what's inside.
Regards, Q.
----Original Message Follows----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
Subject: solid state nst?
Date: Wed, 11 Jan 2006 18:39:34 -0700
Original poster: Frosty <<mailto:frosty90@xxxxxxxxx>frosty90@xxxxxxxxx>
im new to this mailing list and fairly new to tesal coiling and i
live in australia.
ive built two small tesla coils so far (very small cheap and dirty,
because i dont have much money to spend on such things). most of my
parts have been salvage from old tvs, microwaves etc. i recieved a
small nst from a friend a couple of years ago (6000v 30mA), but i
cant get it to work with my tesla coil. I was previously using a
ignition coil and any thing from saltwater capacitors to a bank of
3kV ceramics. The Nst seems to be a solid state inverter or something
because it isnt heavy enough to be an actual transformer. a am
guessing that it works like a flyback or something like that, but i
havent got an oscilloscope or any thing to see exactly what its giving out.
has anyone ever seen these before?
can they be used for a tesla coil?
if any one out there knows the answers, they would be much appreciated!!
thanks