wrote in message
...
On Mon, 4 Mar 2013 23:36:09 +0000 (UTC), Cydrome Leader
wrote:

In sci.electronics.repair Arfa Daily wrote:


"Cydrome Leader" wrote in message
...
In sci.electronics.repair Arfa Daily wrote:


"Cydrome Leader" wrote in message
...
In sci.electronics.repair Arfa Daily wrote:
Has anyone seen any good write-ups on, or figured out for
themselves,
just
how the self-oscillating dirty - i.e. smoothing cap-less -
switchers
that
you find in use as lamp ballasts (or 'electronic transformers' that
they
seem to be sometimes known as) work ?

I recently acquired a fairly sophisticated disco lighting fixture
that
has
such a supply to run the 24v 150 watt lamp. It seems to have two
main
switching devices, which I suspect are FETs or IGBTs, but can't
tell
for
sure so far, as the numbers have been ground off them. On the mains
side,

That's pretty high tech for a product from the 1970s to use a
switching
power supply.



1970s ? Where did you get that from ? It's actually about 4 or 5 years
old
at a guess ...

Arfa

This one seemed to go over everyone's heads.

the joke (and sad truth) is disco never died in europe. All horrible
things last forever there.


Clearly, you don't understand the difference between 'Disco' and *a*
disco
... See my other reply :-)



the germans have some of the creapiest musicans that are still alive
and
popular, like Fancy.


Well, that's Germany for you. That's mainland Europe, which we in the
uk,
aren't. Being an island, our culture is rather different from that of
mainland Europeans, although politicians both sides of that watery
divide
seem to have trouble comprehending that. We have some of the best
musicians
in the world, and most of the rest of the world follows our lead ...

It is safe to say good music comes out of the UK on a regular basis.

Bagpipes?


Ah, now that's a bit of a funny one. Predominantly of Scottish and Irish
origins. It's a bit of an acquired taste. Can be quite effective in certain
types of folk music, but also, can be a wailing dirge in 'native'
stand-alone mode. Can also be very 'stirring' when used for military marches
with drums, and of course, used by nations all over the place to bring the
new year in. And then there was Paul McCartney's "Mull of Kintyre", a lovely
song, but I was never 100% convinced that it was actually genuine pipes on
the recording, and not from a synthesizer, as it sounds slightly too
pitch-perfect ...

Arfa