UV light sources question
2004-01-20 by tboneuk_2000
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Thread
2004-01-20 by tboneuk_2000
2004-01-20 by Leon Heller
----- Original Message -----
From: "tboneuk_2000" <a_reynolds@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, January 20, 2004 1:12 AM
Subject: [Homebrew_PCBs] UV light sources question
> Hello all,
> I would like to make my own uv exposure box, but I am having some
> trouble locating a suitable tube. Could anyone tell me if replacement
> aquariam uv tubes would work (do they opperate at a different
> wavlength), also can you use disco uv tubes?
>
> If anyone knows of a supplier in the uk other than maplin I would
> appreciate it (RS do sell them but they are very expensive, maplin
> are out of stock)
Rapid Electronics has them for 12.20 a pair.
Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html
2004-01-20 by mikezcnc
>some
> ----- Original Message -----
> From: "tboneuk_2000" <a_reynolds@b...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Tuesday, January 20, 2004 1:12 AM
> Subject: [Homebrew_PCBs] UV light sources question
>
>
> > Hello all,
> > I would like to make my own uv exposure box, but I am having
> > trouble locating a suitable tube. Could anyone tell me ifreplacement
> > aquariam uv tubes would work (do they opperate at a differentmaplin
> > wavlength), also can you use disco uv tubes?
> >
> > If anyone knows of a supplier in the uk other than maplin I would
> > appreciate it (RS do sell them but they are very expensive,
> > are out of stock)
>
> Rapid Electronics has them for 12.20 a pair.
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@d...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html
2004-01-20 by Leon Heller
----- Original Message -----
From: "mikezcnc" <eemikez@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, January 20, 2004 7:01 AM
Subject: [Homebrew_PCBs] Re: UV light sources question
> Leon, how long does it take you to expose the PCB?
I have mine about 20 cm away from the PCB to get a sharper image, so I use
13 mins. It depends on the distance, of course. Over-exposure doesn't matter
so much as under-exposure. Test with some artwork and expose progressively
with a cardboard mask, moving it every minute, to get the correct exposure
time.
>
> Disco tubes (Black Light) are mentioned on the web all the time but I
> think they have the wrong wavelength for PCBs.
They will work, I think, but aren't as good as the proper ones.
Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html
2004-01-20 by nuno-t
2004-01-20 by DHC
----- Original Message -----
From: nuno-t
To: Homebrew_PCBs@yahoogroups.com
Sent: Wednesday, January 21, 2004 8:47 AM
Subject: RE: [Homebrew_PCBs] UV light sources question
Hi,
I used to work with UV tubes the same kind used in insect electrocutors.
Never had a problem related with exposure with these.
Best,
Nuno T.
-----Original Message-----
From: tboneuk_2000 [mailto:a_reynolds@...]
Sent: terça-feira, 20 de Janeiro de 2004 1:12
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] UV light sources question
Hello all,
I would like to make my own uv exposure box, but I am having some
trouble locating a suitable tube. Could anyone tell me if replacement
aquariam uv tubes would work (do they opperate at a different
wavlength), also can you use disco uv tubes?
If anyone knows of a supplier in the uk other than maplin I would
appreciate it (RS do sell them but they are very expensive, maplin
are out of stock)
Thanks for your help
---
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2004-01-21 by mikezcnc
>so I use
> ----- Original Message -----
> From: "mikezcnc" <eemikez@c...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Tuesday, January 20, 2004 7:01 AM
> Subject: [Homebrew_PCBs] Re: UV light sources question
>
>
> > Leon, how long does it take you to expose the PCB?
>
> I have mine about 20 cm away from the PCB to get a sharper image,
> 13 mins. It depends on the distance, of course. Over-exposuredoesn't matter
> so much as under-exposure. Test with some artwork and exposeprogressively
> with a cardboard mask, moving it every minute, to get the correctexposure
> time.but I
>
>
> >
> > Disco tubes (Black Light) are mentioned on the web all the time
> > think they have the wrong wavelength for PCBs.
>
> They will work, I think, but aren't as good as the proper ones.
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@d...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html
2004-01-21 by mikezcnc
--- In Homebrew_PCBs@yahoogroups.com, "nuno-t" <nuno-t@n...> wrote:
> Hi,
>
> I used to work with UV tubes the same kind used in insect
electrocutors.
> Never had a problem related with exposure with these.
>
> Best,
>
> Nuno T.
>
> -----Original Message-----
> From: tboneuk_2000 [mailto:a_reynolds@b...]
> Sent: terça-feira, 20 de Janeiro de 2004 1:12
> To: Homebrew_PCBs@yahoogroups.com
> Subject: [Homebrew_PCBs] UV light sources question
>
>
> Hello all,
> I would like to make my own uv exposure box, but I am having some
> trouble locating a suitable tube. Could anyone tell me if
replacement
> aquariam uv tubes would work (do they opperate at a different
> wavlength), also can you use disco uv tubes?
>
> If anyone knows of a supplier in the uk other than maplin I would
> appreciate it (RS do sell them but they are very expensive, maplin
> are out of stock)
>
> Thanks for your help
>
> ---
> Outgoing mail is AVG certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.562 / Virus Database: 354 - Release Date: 16-01-2004
2004-01-21 by Ben H. Lanmon
2004-01-21 by Stefan Trethan
> The tubes that I am using are Black Lite, when I got them at ai think with the proper tubes (4 at 7") you should have 30s.
> lighting dist. I had asked for these with out the blue filter which
> was what M.G. Chemicals had recommended using but after I picked
> them up and got home with them found that they had sold me tubes
> with the blue filter. I tried them and worked OK so here I am some
> 10 years later and still using them. They are a Sylvania
> Blacklight Blue F15T8/BLB I use (4) of these at a distance of
> about 7" for about 5 to 6 mins. I normally do boards 12" x 8" or
> 10" x 8" in size and using the M.G. Chemicals 600 series boards.
>
> Ben
>
2004-01-21 by mikezcnc
> The tubes that I am using are Black Lite, when I got them at a
> lighting dist. I had asked for these with out the blue filter which
> was what M.G. Chemicals had recommended using but after I picked
> them up and got home with them found that they had sold me tubes
> with the blue filter. I tried them and worked OK so here I am some
> 10 years later and still using them. They are a Sylvania
> Blacklight Blue F15T8/BLB I use (4) of these at a distance of
> about 7" for about 5 to 6 mins. I normally do boards 12" x 8" or
> 10" x 8" in size and using the M.G. Chemicals 600 series boards.
>
> Ben
2004-01-21 by mikezcnc
> On Wed, 21 Jan 2004 06:37:37 -0000, Ben H. Lanmon <bhleavi@y...>which
> wrote:
>
> > The tubes that I am using are Black Lite, when I got them at a
> > lighting dist. I had asked for these with out the blue filter
> > was what M.G. Chemicals had recommended using but after I pickedsome
> > them up and got home with them found that they had sold me tubes
> > with the blue filter. I tried them and worked OK so here I am
> > 10 years later and still using them. They are a Sylvaniathen.
> > Blacklight Blue F15T8/BLB I use (4) of these at a distance of
> > about 7" for about 5 to 6 mins. I normally do boards 12" x 8" or
> > 10" x 8" in size and using the M.G. Chemicals 600 series boards.
> >
> > Ben
> >
>
> i think with the proper tubes (4 at 7") you should have 30s.
> i am sure about that, because i used such a unit some time ago.
> i'm sorry but i can no longer look for the type of tubes and didn't
> the board was bungard i think, but standard sensitivity (nodarkroom or so
> required).sensitive.
> I suspect it must be short-wavelength UV.
> this has more energy by itself, maybe also the resist is more
> the "black light" tubes are, as said before, long wave uv (toprotect the
> eyes).
>
> ST
2004-01-21 by Jeremy Taylor
----- Original Message -----
From: "mikezcnc" <eemikez@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, January 21, 2004 11:18 AM
Subject: [Homebrew_PCBs] Re: UV light sources question
> Notice Stefan that he sad that the Black Light he's got does have
> the Blue Filter on them ie the types are blue... But it still beats
> the sun exposure. By deafult the Black Light is designed for human
> eyes viewing and therefore cannot be the damaging light, ie won't be
> too great as we know now, for PCBs.
>
> Mike
>
> --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
> <stefan_trethan@g...> wrote:
> > On Wed, 21 Jan 2004 06:37:37 -0000, Ben H. Lanmon <bhleavi@y...>
> > wrote:
> >
> > > The tubes that I am using are Black Lite, when I got them at a
> > > lighting dist. I had asked for these with out the blue filter
> which
> > > was what M.G. Chemicals had recommended using but after I picked
> > > them up and got home with them found that they had sold me tubes
> > > with the blue filter. I tried them and worked OK so here I am
> some
> > > 10 years later and still using them. They are a Sylvania
> > > Blacklight Blue F15T8/BLB I use (4) of these at a distance of
> > > about 7" for about 5 to 6 mins. I normally do boards 12" x 8" or
> > > 10" x 8" in size and using the M.G. Chemicals 600 series boards.
> > >
> > > Ben
> > >
> >
> > i think with the proper tubes (4 at 7") you should have 30s.
> > i am sure about that, because i used such a unit some time ago.
> > i'm sorry but i can no longer look for the type of tubes and didn't
> then.
> > the board was bungard i think, but standard sensitivity (no
> darkroom or so
> > required).
> > I suspect it must be short-wavelength UV.
> > this has more energy by itself, maybe also the resist is more
> sensitive.
> > the "black light" tubes are, as said before, long wave uv (to
> protect the
> > eyes).
> >
> > ST
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/Homebrew_PCBs/
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
2004-01-21 by nuno-t
--- In Homebrew_PCBs@yahoogroups.com, "nuno-t" <nuno-t@n...> wrote:
> Hi,
>
> I used to work with UV tubes the same kind used in insect
electrocutors.
> Never had a problem related with exposure with these.
>
> Best,
>
> Nuno T.
>
> -----Original Message-----
> From: tboneuk_2000 [mailto:a_reynolds@b...]
> Sent: terça-feira, 20 de Janeiro de 2004 1:12
> To: Homebrew_PCBs@yahoogroups.com
> Subject: [Homebrew_PCBs] UV light sources question
>
>
> Hello all,
> I would like to make my own uv exposure box, but I am having some
> trouble locating a suitable tube. Could anyone tell me if
replacement
> aquariam uv tubes would work (do they opperate at a different
> wavlength), also can you use disco uv tubes?
>
> If anyone knows of a supplier in the uk other than maplin I would
> appreciate it (RS do sell them but they are very expensive, maplin
> are out of stock)
>
> Thanks for your help
>
> ---
> Outgoing mail is AVG certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.562 / Virus Database: 354 - Release Date: 16-01-2004
Be sure to visit the group home and check for new Bookmarks and files:
http://groups.yahoo.com/group/Homebrew_PCBs
Yahoo! Groups Links
To visit your group on the web, go to:
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To unsubscribe from this group, send an email to:
Homebrew_PCBs-unsubscribe@yahoogroups.com
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---
Outgoing mail is AVG certified Virus Free.
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2004-01-21 by nuno-t
--- In Homebrew_PCBs@yahoogroups.com, "nuno-t" <nuno-t@n...> wrote:
> Hi,
>
> I used to work with UV tubes the same kind used in insect
electrocutors.
> Never had a problem related with exposure with these.
>
> Best,
>
> Nuno T.
2004-01-22 by Ben H. Lanmon
> i think with the proper tubes (4 at 7") you should have 30s.Well I tried the Blacklite tubes that I ended up with because as I
2004-01-22 by Stefan Trethan
2004-01-22 by Stefan Trethan
> > i think with the proper tubes (4 at 7") you should have 30s.maybe the MG resist is just different from the one i used with 30
>
> Well I tried the Blacklite tubes that I ended up with because as I
> remember M.G. Chemicials had said that they could be used but that
> the none filtered or non blue tubes where recommended.
>
> I have never exposed a board for 30 seconds. As I said it is about
> 5 - 6 seconds what I found that worked and have been for years. I
> used a mechical timer switch to set the time. The longest I have
> exposed is maybe 10 sec. I dropped down to the 5-6 secs just
> expermenting to see how short of time that I could do.
>
> I took a picture of one of my boards the other evening, I will see
> about posting it in the files area. It was exposed for 5-6 sec.
> developer is the M.G. Chemicals which is Sodium Hydroxide. I etch
> in Ferric Chloride 5 gal. homemade bubble tank.
>
> Ben
>
2004-01-22 by Leon Heller
----- Original Message -----
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, January 22, 2004 4:15 PM
Subject: Re: [Homebrew_PCBs] Re: UV light sources question
> has one of you here tried the arc lamp method?
> i have seen a page where a arc lamp was used (i think the link came from
> here).
> the outer glass shell was demolished, (which is the filter/converter).
> the inner shell in which the arc burns is quartz glass, good to let
> through short UV.
>
> i really wonder what the times are with that lamp.
> it is a point source so the "light undercutting" would be less too.
> and this lamps are available with quite a lot of wattage.....
I have heard of someone doing this. It worked very well. Cannot remember
where I saw it, though.
Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html
2004-01-22 by Etchenique Fabian
> ----------
> De: Leon Heller[SMTP:leon_heller@...]
> Responder a: Homebrew_PCBs@yahoogroups.com
> Enviado el: Jueves 22 de Enero de 2004 01:34
> Para: Homebrew_PCBs@yahoogroups.com
> Asunto: Re: [Homebrew_PCBs] Re: UV light sources question
>
> ***********************
> El mail fue rastreado por la oficina de Sistemas de Artes Graficas
> Rioplatense a traves del Interscan Messaging Security Suite y se encuentra
> libre de virus.
> ***********-***********
>
>
>
> ----- Original Message -----
> From: "Stefan Trethan" <stefan_trethan@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Thursday, January 22, 2004 4:15 PM
> Subject: Re: [Homebrew_PCBs] Re: UV light sources question
>
>
> > has one of you here tried the arc lamp method?
> > i have seen a page where a arc lamp was used (i think the link came from
> > here).
> > the outer glass shell was demolished, (which is the filter/converter).
> > the inner shell in which the arc burns is quartz glass, good to let
> > through short UV.
> >
> > i really wonder what the times are with that lamp.
> > it is a point source so the "light undercutting" would be less too.
> > and this lamps are available with quite a lot of wattage.....
>
> I have heard of someone doing this. It worked very well. Cannot remember
> where I saw it, though.
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/Homebrew_PCBs/
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
>
2004-01-22 by Leon Heller
----- Original Message -----
From: "Etchenique Fabian" <fetchenique@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, January 22, 2004 4:57 PM
Subject: RE: [Homebrew_PCBs] Re: UV light sources question
> ***********************
> El mail fue rastreado por la oficina de Sistemas de Artes Graficas
Rioplatense a traves del Interscan Messaging Security Suite y se encuentra
libre de virus.
> ***********-***********
>
>
> Yes ,
>
> I am using an Mercury mixer lamp 400 watts power
>
> simply i broke the glass envelope and use the inner quartz tube.
>
> be aware do not touch the quartz tube or will be broken with naturals oils
The quartz may be cleaned with IPA or similar if it is touched accidentally.
Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html
2004-01-22 by mikezcnc
--- In Homebrew_PCBs@yahoogroups.com, "Jeremy Taylor" <jt@j...> wrote:
> I think the film has the most to do with it. I have a home made 6
bulb (3
> per side) box, with 18" bulbs 3" away. I use the boards from circuit
> specialists, They say right on the package, 90 seconds with Real UV
bulbs,
> or (up to) 9 min with standard fluorescent. The black light bulbs
seem to
> fall somewhere in the middle. I use them - 6-7 min seems to be
perfect. I'm
> sure real uv bulbs would speed it up, and normal fluorescent would
slow it
> down (but it'd still work)
> I think the difference would be more dramatic with a negative style
pro
> film.
>
> ----- Original Message -----
> From: "mikezcnc" <eemikez@c...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Wednesday, January 21, 2004 11:18 AM
> Subject: [Homebrew_PCBs] Re: UV light sources question
>
>
> > Notice Stefan that he sad that the Black Light he's got does have
> > the Blue Filter on them ie the types are blue... But it still
beats
> > the sun exposure. By deafult the Black Light is designed for human
> > eyes viewing and therefore cannot be the damaging light, ie won't
be
> > too great as we know now, for PCBs.
> >
> > Mike
> >
> > --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
> > <stefan_trethan@g...> wrote:
> > > On Wed, 21 Jan 2004 06:37:37 -0000, Ben H. Lanmon <bhleavi@y...>
> > > wrote:
> > >
> > > > The tubes that I am using are Black Lite, when I got them at
a
> > > > lighting dist. I had asked for these with out the blue filter
> > which
> > > > was what M.G. Chemicals had recommended using but after I
picked
> > > > them up and got home with them found that they had sold me
tubes
> > > > with the blue filter. I tried them and worked OK so here I am
> > some
> > > > 10 years later and still using them. They are a Sylvania
> > > > Blacklight Blue F15T8/BLB I use (4) of these at a distance
of
> > > > about 7" for about 5 to 6 mins. I normally do boards 12" x
8" or
> > > > 10" x 8" in size and using the M.G. Chemicals 600 series
boards.
> > > >
> > > > Ben
> > > >
> > >
> > > i think with the proper tubes (4 at 7") you should have 30s.
> > > i am sure about that, because i used such a unit some time ago.
> > > i'm sorry but i can no longer look for the type of tubes and
didn't
> > then.
> > > the board was bungard i think, but standard sensitivity (no
> > darkroom or so
> > > required).
> > > I suspect it must be short-wavelength UV.
> > > this has more energy by itself, maybe also the resist is more
> > sensitive.
> > > the "black light" tubes are, as said before, long wave uv (to
> > protect the
> > > eyes).
> > >
> > > ST
> >
> >
> > Be sure to visit the group home and check for new Bookmarks and
files:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> >
> > Yahoo! Groups Links
> >
> > To visit your group on the web, go to:
> > http://groups.yahoo.com/group/Homebrew_PCBs/
> >
> > To unsubscribe from this group, send an email to:
> > Homebrew_PCBs-unsubscribe@yahoogroups.com
> >
> > Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
2004-01-23 by Adam Seychell
> Hello all,For fluro tubes type lamps then you need standard BL (blacklight) lamps
> I would like to make my own uv exposure box, but I am having some
> trouble locating a suitable tube. Could anyone tell me if replacement
> aquariam uv tubes would work (do they opperate at a different
> wavlength), also can you use disco uv tubes?
>
> If anyone knows of a supplier in the uk other than maplin I would
> appreciate it (RS do sell them but they are very expensive, maplin
> are out of stock)
>
> Thanks for your help
>
2004-01-23 by Leon Heller
2004-01-23 by Ben H. Lanmon
2004-01-23 by Ben H. Lanmon
> Went to the M.G. Chemicals websiteSylvania website listed the Blacklite as having a peak output at
>
> They list the wavelength at 375nm
2004-01-26 by roel_cnc
>TL-40/05-from PHILIPS i use workz great older series
> > Went to the M.G. Chemicals website
> >
> > They list the wavelength at 375nm
>
> Sylvania website listed the Blacklite as having a peak output at
> 356nm
2004-01-27 by Adam Seychell
> --- In Homebrew_PCBs@yahoogroups.com, "Ben H. Lanmon" <bhleavi@y...>Yes, a sun tanning lamp may be great source for photoresist exposure.
> wrote:
>
>>>Went to the M.G. Chemicals website
>>>
>>>They list the wavelength at 375nm
>>
>>Sylvania website listed the Blacklite as having a peak output at
>> 356nm
>
>
>
> TL-40/05-from PHILIPS i use workz great older series
> Actinic Lamp
> color/05
> nm:300-460 uvb type is used in many major brands like welisch rapid
>
> now these days dey run under the type/name "cleo"
>
> bit more info
> http://www.eur.lighting.philips.com/int_en/oem/ca/special/segments/bod
> ycare/natural.html
>
> gr Roel
>
2004-01-28 by tboneuk_2000
> Hello all,replacement
> I would like to make my own uv exposure box, but I am having some
> trouble locating a suitable tube. Could anyone tell me if
> aquariam uv tubes would work (do they opperate at a differentHello All, sorry for not posting sooner but I have been away on
> wavlength), also can you use disco uv tubes?
>
> If anyone knows of a supplier in the uk other than maplin I would
> appreciate it (RS do sell them but they are very expensive, maplin
> are out of stock)
>
> Thanks for your help
2004-01-28 by Leon Heller
----- Original Message -----
From: "tboneuk_2000" <a_reynolds@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, January 28, 2004 12:46 AM
Subject: [Homebrew_PCBs] Re: UV light sources question
--- In Homebrew_PCBs@yahoogroups.com, "tboneuk_2000"
<a_reynolds@b...> wrote:
> Hello all,
> I would like to make my own uv exposure box, but I am having some
> trouble locating a suitable tube. Could anyone tell me if
replacement
> aquariam uv tubes would work (do they opperate at a different
> wavlength), also can you use disco uv tubes?
>
> If anyone knows of a supplier in the uk other than maplin I would
> appreciate it (RS do sell them but they are very expensive, maplin
> are out of stock)
>
> Thanks for your help
Hello All, sorry for not posting sooner but I have been away on
buisness for a while.
A big thankyou for all your surgestions and comments, this has helped
a lot.
Although this maybe not the best solution I managed to pick up a
couple of blacklight tubes for £5 the pair from a local market
stall
(the guy had a stockpile of them and it wasn't finacialy viable to
stock the 1FT fittings so he was more than pleased to sell at a
reduced price). Also at a local car boot sale (same sort of thing as
a garage sale for our american cousins) I picked up a couple of 1FT
fittings including Balasts, starter etc fot £2. I have made a base
out of plywood with all the part on and put the whole lot into an
aluminium case. I'm using Glass for the top, although perspex may be
preferable (due to UV absorsion on glass) and a timer based on a pic
circuit.
Glass doesn't absorb much of the long-wave UV used for exposing PCBs.
Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html
2004-01-28 by mikezcnc
>some
> ----- Original Message -----
> From: "tboneuk_2000" <a_reynolds@b...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Wednesday, January 28, 2004 12:46 AM
> Subject: [Homebrew_PCBs] Re: UV light sources question
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "tboneuk_2000"
> <a_reynolds@b...> wrote:
> > Hello all,
> > I would like to make my own uv exposure box, but I am having
> > trouble locating a suitable tube. Could anyone tell me ifhelped
> replacement
> > aquariam uv tubes would work (do they opperate at a different
> > wavlength), also can you use disco uv tubes?
> >
> > If anyone knows of a supplier in the uk other than maplin I would
> > appreciate it (RS do sell them but they are very expensive, maplin
> > are out of stock)
> >
> > Thanks for your help
>
> Hello All, sorry for not posting sooner but I have been away on
> buisness for a while.
> A big thankyou for all your surgestions and comments, this has
> a lot.PCBs.
> Although this maybe not the best solution I managed to pick up a
> couple of blacklight tubes for £5 the pair from a local market
> stall
> (the guy had a stockpile of them and it wasn't finacialy viable to
> stock the 1FT fittings so he was more than pleased to sell at a
> reduced price). Also at a local car boot sale (same sort of thing as
> a garage sale for our american cousins) I picked up a couple of 1FT
> fittings including Balasts, starter etc fot £2. I have made a base
> out of plywood with all the part on and put the whole lot into an
> aluminium case. I'm using Glass for the top, although perspex may be
> preferable (due to UV absorsion on glass) and a timer based on a pic
> circuit.
>
> Glass doesn't absorb much of the long-wave UV used for exposing
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@d...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html
2004-01-30 by Ben H. Lanmon
> One thing no one has talked about is what people use for a safelighting. I
> colored a couple of fluorescent tubes with some yellow water basedacrylic
> paint.I use a yellow bug light in a reflector aimed up into the ceiling.
2004-01-30 by Derryck Croker
> A project within a project wihin a project...Any chance of bottom-posting your replies and trimming away all the stuff
>
> Walmart has a simple timer GoodCook that is pleasant to use, simple
2004-01-30 by Stefan Trethan
> Any chance of bottom-posting your replies and trimming away all the stufftrimming is a good idea, but bottom posting?
> you weren't replying to?
>
> I had to re-read the entire message you quoted to discover what you were
> talking about!
>
2004-01-30 by Russell Shaw
>>Any chance of bottom-posting your replies and trimming away all the stuffYou still need to cut the 100+ trailing lines off anyway, so it's no
>>you weren't replying to?
>>
>>I had to re-read the entire message you quoted to discover what you were
>>talking about!
>>
> trimming is a good idea, but bottom posting?
>
> im my mail software i see the top of the mail first, and have to scroll
> down so often to see the reply.
>
> I would vote for top posting, i was told in the past to bottom post and so
> i did.
> Still i find it inconvenient and would like to see how the others think.
2004-01-30 by Alan King
>>Any chance of bottom-posting your replies and trimming away all the stuffAck, ignore it. No one was holding a gun up to their head to read the
>>you weren't replying to?
>>
>>I had to re-read the entire message you quoted to discover what you were
>>talking about!
>>
>
> Still i find it inconvenient and would like to see how the others think.
>
2004-01-30 by Linux_Rules@Ev1.Net
> trimming is a good idea, but bottom posting?Yep. Please post reply immediately following
> im my mail software i see the top of the mail first, and have toBut, some of us cannot always know what the reply is about
> scroll down so often to see the reply.
> I would vote for top posting,One vote to the opposite.
>i was told in the past to bottom postWhat is convenient varies by person, I guess. YMMV.
> and so i did. Still i find it inconvenient and would like to see how
> the others think.
2004-01-30 by Stefan Trethan
>> I would vote for top posting, i was told in the past to bottom post andThe top posting in not for the convenience of the poster, it is for the
>> so
>> i did.
>> Still i find it inconvenient and would like to see how the others think.
>
> You still need to cut the 100+ trailing lines off anyway, so it's no
> extra work to do that, then bottom-post, which should all be visible
> on the screen.
>
2004-01-30 by Dave Mucha
2004-01-30 by Ronald Viers
>__________________________________
> > Any chance of bottom-posting your replies and
> trimming away all the stuff
> > you weren't replying to?
> >
> > I had to re-read the entire message you quoted to
> discover what you were
> > talking about!
> >
>
> trimming is a good idea, but bottom posting?
>
> im my mail software i see the top of the mail first,
> and have to scroll
> down
> so often to see the reply.
>
> I would vote for top posting, i was told in the past
> to bottom post and so
> i did.
> Still i find it inconvenient and would like to see
> how the others think.
>
> ST
>
>
>
> Be sure to visit the group home and check for new
> Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
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>
2004-01-30 by Steve
> Important point that someone made about a thousand monkeys makingSee how hard it is to pick that out without a blank line? Get 5 or 6
> printed circuit boards with typewriters.
> So a quote looks like this, add on a few sentences of stuff and itgets hard to tell when I add on my reply whether there's a blank line
2004-01-30 by Steve
--- In Homebrew_PCBs@yahoogroups.com, Alan King <alan@n...> wrote:
...
> Anyone worrying about such minor junk after the general
discussion just
> doesn't have enough real stuff to worry about, and likely could
stand a tree to
> fall on their car or house to knock them back to a better
perspective.
>
I prefer a more moderate view, being the moderator and all, but points
well taken. All things in moderation. Or was that "take with water"?
Steve
2004-01-31 by Russell Shaw
>>>I would vote for top posting, i was told in the past to bottom post andThe problem is mail clients that don't have a setting to autoscroll to
>>>so i did. Still i find it inconvenient and would like to see how the others think.
>>
>>You still need to cut the 100+ trailing lines off anyway, so it's no
>>extra work to do that, then bottom-post, which should all be visible
>>on the screen.
>>
> The top posting in not for the convenience of the poster, it is for the
> convenience of the reader.
> If the mail is short enough, ok, you can see all on the screen.
> But if it is more than one page (or one half depending on mail software)
> you need to scroll any mail you want to read down.
> I read more posts than i write, as does anyone, so i would rather have
> convenience in reading many mails
> a day, rather than just not reading at all posts with a topic not so interesting.
> The only advantage of bottom post so far is "logical order" which is
> doubtful, as normal (non-list) emails are normally answered on top too?
>
> I will do as the majority (or the owner) says, but i also will voice my
> different opinion.
2004-01-31 by Ben H. Lanmon
2004-01-31 by Derryck Croker
On 30/1/04 16:29, Alan King at alan@... wrote:
Thanks for your kind words.
You're obviously one of the lazy ones who simply cannot take any time or
trouble.
--
Cheers,
Derryck