I have built a few simple air ionizers in the past, all with batches of
100,000 uF capacitors and simple diodes. I am very lazy, I don't want
to go around and buy all components. I wonder if you know any Air
Ionizer kit that I can order and assemble.
If that is not possible, can anybody recommend me a good (not Maplin!)
diy electronics store in Manchester?

Thank you

Vauxall

In article .com,
"vauxall" writes:
I have built a few simple air ionizers in the past, all with batches of
100,000 uF capacitors and simple diodes. I am very lazy, I don't want

I can't imagine how a 100,000µF capacitor is used in an ioniser.

to go around and buy all components. I wonder if you know any Air
Ionizer kit that I can order and assemble.
If that is not possible, can anybody recommend me a good (not Maplin!)
diy electronics store in Manchester?

Ioniser kits have existed, and many years ago, design details and
PCBs were published in magazines such as Everyday Electronics
and Elektor, and I'm sure a search would find several.

A difficulty now would be they have to be tested for being within
permitted levels of ozone production, and that's very hard to do
with something like a kit which can be made slightly differently
by each person. The last one I recall seeing in Elektor some years
ago had warnings about not changing anything about the kit or
construction methods, as it would invalidate the testing they'd
had to put the kit through. Velleman is the only kit producer I
can think of with enough volumes to afford this, but they don't
seem to make one as far as I can see.

--
Andrew Gabriel

Ioniser kits have existed, and many years ago, design details and
PCBs were published in magazines such as Everyday Electronics
and Elektor, and I'm sure a search would find several.

I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

Colin Wilson formulated the question :
I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

As is used on EHT supplies for CRT's.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

In article ,
Harry Bloomfield writes:
Colin Wilson formulated the question :
I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

AFAIK, all mains ones work that way.

As is used on EHT supplies for CRT's.

Hum, never seen that. They mostly use the flyback energy from
the line output transformer, a diode, and a capacitor formed
from the CRT's post deflection amplification electrode and the
earthed coating on the outside of the tube.

--
Andrew Gabriel

"Colin Wilson" wrote in
message t...
Ioniser kits have existed, and many years ago, design details and
PCBs were published in magazines such as Everyday Electronics
and Elektor, and I'm sure a search would find several.


I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs


I think that's the one I assembled from a kit many years ago. Loads of
diodes and low value capacitors. I still remember the fact that the PCB
tracks were not plated.

Sylvain.

"Andrew Gabriel" wrote in message
...
In article ,
Harry Bloomfield writes:
Colin Wilson formulated the question :
I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

AFAIK, all mains ones work that way.

As is used on EHT supplies for CRT's.

Hum, never seen that. They mostly use the flyback energy from
the line output transformer, a diode, and a capacitor formed
from the CRT's post deflection amplification electrode and the
earthed coating on the outside of the tube.


Very briefly and clearly stated. You've awakened some distant memories.
Anything to do with "Practical Television"?
It was very good at explaining how circuits worked.

Sylvain.
--
Andrew Gabriel

"vauxall" wrote in message
oups.com...
I have built a few simple air ionizers in the past, all with batches of
100,000 uF capacitors and simple diodes. I am very lazy, I don't want
to go around and buy all components. I wonder if you know any Air
Ionizer kit that I can order and assemble.
If that is not possible, can anybody recommend me a good (not Maplin!)
diy electronics store in Manchester?

Thank you

Vauxall



Completely useless for the OP's request but an interesting page for how to
make them from scratch http://www.emanator.demon.co.uk/bigclive/ioniser.htm

The whole site http://www.emanator.demon.co.uk/bigclive/index.htm is
stuffed with cool dangerous things to make and do.

H

Colin Wilson wrote:

I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

This one is a bit big for the average room. I'm working on a smaller
one right now:
http://i17.tinypic.com/2r39l06.jpg

Harry Bloomfield verbally sodomised in
:

Colin Wilson formulated the question :
I'm crap at electronics, but I remember a "cockroft walton ladder"
being used in several ioniser designs

As is used on EHT supplies for CRT's.


FAB

--
Phil Kyle™

T
h i
i s
s l
f i l
S o n o
i u e n
g r s g

(Andrew Gabriel) verbally sodomised in
:

In article ,
Harry Bloomfield writes:
Colin Wilson formulated the question :
I'm crap at electronics, but I remember a "cockroft walton ladder"
being used in several ioniser designs

AFAIK, all mains ones work that way.

As is used on EHT supplies for CRT's.

Hum, never seen that. They mostly use the flyback energy from
the line output transformer, a diode, and a capacitor formed
from the CRT's post deflection amplification electrode and the
earthed coating on the outside of the tube.


Looks like Harold was wrong. Again.

--
Phil Kyle™

T
h i
i s
s l
f i l
S o n o
i u e n
g r s g

In message .com,
Matty F writes
Colin Wilson wrote:

I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

This one is a bit big for the average room. I'm working on a smaller
one right now:
http://i17.tinypic.com/2r39l06.jpg

But if you want serious ...

http://www.lod.org/

(having just read a 6 month old New Scientist)

--
geoff

Easy for you to say.

In article .com,
vauxall wrote:
If that is not possible, can anybody recommend me a good (not Maplin!)
diy electronics store in Manchester?

Are there any left? Maplin have moved away from hobby electronics due to
lack of demand. At one time I had about half a dozen others round here in
London within easy distance. All closed years ago.

--
*Time flies like an arrow. Fruit flies like a banana.*

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
"Dave Plowman (News)" writes:
In article .com,
vauxall wrote:
If that is not possible, can anybody recommend me a good (not Maplin!)
diy electronics store in Manchester?

Are there any left? Maplin have moved away from hobby electronics due to
lack of demand. At one time I had about half a dozen others round here in
London within easy distance. All closed years ago.

I wish I understood why. I visit the US quite often, and there are
still loads of such shops out there (in California, at least). Of
particular interest to many hobbyists are the junk/surpless places
that Tottenham Court Road and Edware Road used to be full of,
Proops (gone) and Henrys (still there) being the last ones. There
were a couple in Reading when I was a teenager, which I visited as
often as pocket money allowed, all gone now.

--
Andrew Gabriel

vauxall wrote:
I have built a few simple air ionizers in the past, all with batches of
100,000 uF capacitors and simple diodes. I am very lazy, I don't want
to go around and buy all components. I wonder if you know any Air
Ionizer kit that I can order and assemble.
If that is not possible, can anybody recommend me a good (not Maplin!)
diy electronics store in Manchester?

Thank you

Vauxall

LOL. This brings back memories of one I made years ago - a kit from
(IIRC) Bull Electrical who always advertised in the electronics
magazines - this was pre internet mail order - rembember those days?

Anyway, it was in one of those large ugly black project boxes with two
hastily drilled holes for the needles, and yet it had pride of place in
the living room. That was untill the area around it went black and
dusty.

Try www.bullnet.co.uk

dg

Andrew Gabriel wrote:


I can't imagine how a 100,000µF capacitor is used in an ioniser.

In fact, it is 0.01uF. Sorry.

Vauxall

In message , Andrew Gabriel
writes
As is used on EHT supplies for CRT's.

Hum, never seen that.
You've not worked on telly's for long then? If you have, you should
really be going back to your books.
They mostly use the flyback energy from
the line output transformer, a diode, and a capacitor formed
from the CRT's post deflection amplification electrode and the
earthed coating on the outside of the tube.
Only on old Mono sets is the arrangement that simple.

It's still a Cockcroft Walton ladder design even if it's built into the
EHT transformer
--
Clint Sharp

In message , Andrew Gabriel
wrote
In article ,
Harry Bloomfield writes:
Colin Wilson formulated the question :
I'm crap at electronics, but I remember a "cockroft walton ladder" being
used in several ioniser designs

AFAIK, all mains ones work that way.

As is used on EHT supplies for CRT's.

Hum, never seen that. They mostly use the flyback energy from
the line output transformer, a diode, and a capacitor formed
from the CRT's post deflection amplification electrode and the
earthed coating on the outside of the tube.



see
http://www.emanator.demon.co.uk/bigclive/ioniser.htm

http://www.emanator.demon.co.uk/bigclive/ozone.htm


and similar things to DIY at
http://www.emanator.demon.co.uk/bigclive/makendo.htm

--
Alan
news2006 {at} amac {dot} f2s {dot} com