14 Dec
2009
14 Dec
'09
5:25 p.m.
I just heard about this an hour ago. The estate of John Musa (software
engineering old timer) is having a big auction TONIGHT (as in right
now). A friend is there, and he says that their are about 50 box lots
of interesting computer docs.
I suppose I will find out what happens.
Any reports from the field? Did any of us go?
--
Will
14 Dec
14 Dec
5:50 p.m.
make sure the rest of you don't hire the auctioneer, if no one here knew
and was invited. Shame to hear about it almost after the fact.
William Donzelli wrote:
I just heard about this an hour ago. The estate of
John Musa (software
engineering old timer) is having a big auction TONIGHT (as in right
now). A friend is there, and he says that their are about 50 box lots
of interesting computer docs.
I suppose I will find out what happens.
Any reports from the field? Did any of us go?
--
Will
15 Dec
15 Dec
12:14 a.m.
New subject: UV light question.
Hey! I'm looking at doing some single sided pcb's. From what I can tell, if
I want the pre-sensitized board to expose in a reasonable amount of time, I
am going to need to make a UV box to expose it with. I could apparently use
a regular fluorescent bulb but it will take 30-50 minutes to be ready for
developing.... And with cats, dogs and teenagers (and a friends 3 year old
many days) that is way too long to assume something is going to be left
without being bumped or knocked over :)
So, anyone have a good source for UV bulbs between 350 and 440 nm ? At a
reasonable price?
On 12/14/09 5:50 PM, "jim s" <jws at jwsss.com> wrote:
make sure the rest of you don't hire the
auctioneer, if no one here knew
and was invited. Shame to hear about it almost after the fact.
William Donzelli wrote:
I just heard about this an hour ago. The estate
of John Musa (software
engineering old timer) is having a big auction TONIGHT (as in right
now). A friend is there, and he says that their are about 50 box lots
of interesting computer docs.
I suppose I will find out what happens.
Any reports from the field? Did any of us go?
--
Will
12:35 a.m.
New subject: UV light question.
Geoffrey Reed wrote:
Hey! I'm looking at doing some single sided pcb's. From what I can tell, if
I want the pre-sensitized board to expose in a reasonable amount of time, I
am going to need to make a UV box to expose it with. I could apparently use
a regular fluorescent bulb but it will take 30-50 minutes to be ready for
developing.... And with cats, dogs and teenagers (and a friends 3 year old
many days) that is way too long to assume something is going to be left
without being bumped or knocked over :)
So, anyone have a good source for UV bulbs between 350 and 440 nm ? At a
reasonable price?
More in the vein of humour than helpfulness, and I don't know about the tech
specs and how photo-resists may have changed, but in the 70's I used my Mom's
otherwise-neglected UV sun-tanning lamp for this purpose. I think it was on the
order of a few minutes exposure time, but that's a pretty vague recollection.
2:49 a.m.
New subject: UV light question.
Hey! I'm looking at doing some single sided
pcb's. From what I can tell,
if
I want the pre-sensitized board to expose in a reasonable amount of time,
I
am going to need to make a UV box to expose it with. I could apparently
use
a regular fluorescent bulb but it will take 30-50 minutes to be ready for
developing.... And with cats, dogs and teenagers (and a friends 3 year
old
many days) that is way too long to assume something is going to be left
without being bumped or knocked over :)
So, anyone have a good source for UV bulbs between 350 and 440 nm ? At a
reasonable price?
Using old scanners as lightboxes is an old trick :) And it keeps your
board and drawing aligned :)
10:33 a.m.
New subject: UV light question.
From: pu1bzz.listas at gmail.com
---snip---
Using old scanners as lightboxes is an old trick :) And it keeps your
board and drawing aligned :)
How many passes through the scanner does it take?
Dwight
_________________________________________________________________
Hotmail: Trusted email with powerful SPAM protection.
http://clk.atdmt.com/GBL/go/177141665/direct/01/
11:57 a.m.
New subject: UV light question.
Using old scanners as lightboxes is an old trick
:) And it keeps your
board and drawing aligned :)
How many passes through the scanner does it take?
Many, but if you take out the scanner mechanics and install some
reflective paper and a pair of UV lamps, it gives a great lightbox :)
16 Dec
16 Dec
8:13 a.m.
New subject: UV light question.
Or you can borrow a metal halide "grow
light" from your friendly local pot
farmer.
The ones by me aren't so "friendly"...
On Tue, Dec 15, 2009 at 1:57 PM, Alexandre Souza - Listas <
pu1bzz.listas at gmail.com> wrote:
Using old scanners as lightboxes is an old trick :)
And it keeps your
finally! something to do with the old obsolete scanners I have sitting
around!
board and drawing aligned :)
How many passes through the scanner does it take?
Many, but if you take out the scanner mechanics and install some
reflective paper and a pair of UV lamps, it gives a great lightbox :)
15 Dec
15 Dec
6:43 a.m.
New subject: UV light question.
So, anyone have a good source for UV bulbs between 350
and
440 nm ?? At a
reasonable price?
Some time back, I got one for PC boards and EPROM
erasing. I got a germicidal tube from an electrical
supply house. (I don't know if they still do, but
they used to have UV fixtures in commercial laundry
equipment to kill any germs on the clothes.)
BLS
9:39 a.m.
New subject: UV light question.
On 15 Dec 2009 at 0:14, Geoffrey Reed wrote:
So, anyone have a good source for UV bulbs between 350
and 440 nm ?
At a reasonable price?
Since this is long-wave UV (UVA) , you don't need the germicidal
lamps, which are made to produce light at about 250 nm. An old
consumer "sunlamp" for tanning or a low-pressure mercury vapor
outdoor luminaire are suitable choices. Or you can borrow a metal
halide "grow light" from your friendly local pot farmer.
Sunlight also works well, if you get the stuff this time of year (he
said, peering out the window at the dark gray sky).
--Chuck
3:27 p.m.
New subject: UV light question.
On 12/15/09 9:39 AM, "Chuck Guzis" <cclist at sydex.com> wrote:
On 15 Dec 2009 at 0:14, Geoffrey Reed wrote:
Lots of clouds here in the seattle area currently. Been about 20 years
since I knew anyone with grow lights :)
So, anyone have a good source for UV bulbs
between 350 and 440 nm ?
At a reasonable price?
Since this is long-wave UV (UVA) , you don't need the germicidal
lamps, which are made to produce light at about 250 nm. An old
consumer "sunlamp" for tanning or a low-pressure mercury vapor
outdoor luminaire are suitable choices. Or you can borrow a metal
halide "grow light" from your friendly local pot farmer.
Sunlight also works well, if you get the stuff this time of year (he
said, peering out the window at the dark gray sky).
--Chuck
3:45 p.m.
New subject: UV light question.
On 15 Dec 2009 at 15:27, Geoffrey Reed wrote:
Lots of clouds here in the seattle area currently.
Been about 20
years since I knew anyone with grow lights :)
The big metal halide jobs keep showing up on the local Craigslist
here. Probably a cultural thing down here in Oregon.
Wonder if Fred sees them much down there in Berkeley...
--Chuck
17 Dec
17 Dec
12:01 p.m.
New subject: UV light question.
On Tue, 15 Dec 2009, Chuck Guzis wrote:
The big metal halide jobs keep showing up on the local
Craigslist
here. Probably a cultural thing down here in Oregon.
Wonder if Fred sees them much down there in Berkeley...
There are a couple of fairly sizable "indoor grdening supply" stores.
But, I don't hang out in those circles, and I've heard that the DEA has
been fighting for a long time to get at their customer records.
If you were to set up a store, there would probably be plenty of demand
for them, from people who would buy dozens at a time. They must have a
helluva lot of EPROMs, etc.
6:48 p.m.
New subject: UV light question.
On 17 Dec 2009 at 12:01, Fred Cisin wrote:
If you were to set up a store, there would probably be
plenty of
demand for them, from people who would buy dozens at a time. They
must have a helluva lot of EPROMs, etc.
Lately, around here, the dodge has been to find an absentee landlord
with a house to rent and convert the whole thing to a grow operation.
The last one that local law enforcement busted had no one living in
the house but the "farmer' bought a car to park in front of the house
and paid someone to periodically move it. The local electrical
utility eventually got suspicious. A quick check turned up 3 other
similar operations run by the same guy.
A quick perusal of the local CL shows a couple of current listings
offering 1000W 145K lumen "expanded spectrum" bulbs and fixtures for
"agriculture".
Those must be some mighty expensive carrots. But they'd probably
erase a bunch of EPROMs pretty fast.
--Chuck
15 Dec
15 Dec
11:26 a.m.
New subject: UV light question.
On Tue, Dec 15, 2009 at 12:14 AM, Geoffrey Reed <geoffr at zipcon.net> wrote:
So, anyone have a good source for UV bulbs between 350 and 440 nm ? ?At a
reasonable price?
What's a reasonable price? Any of these what you want?
http://www.topbulb.com/find/prod_list.asp_Q_intSubCategory_E_796
(the shipping would close to the price of the bulb)
17 Dec
17 Dec
7:41 p.m.
New subject: UV light question.
At 12:14 AM -0800 12/15/09, Geoffrey Reed wrote:
Hey! I'm looking at doing some single sided
pcb's. From what I can tell, if
I want the pre-sensitized board to expose in a reasonable amount of time, I
am going to need to make a UV box to expose it with. I could apparently use
a regular fluorescent bulb but it will take 30-50 minutes to be ready for
developing.... And with cats, dogs and teenagers (and a friends 3 year old
many days) that is way too long to assume something is going to be left
without being bumped or knocked over :)
So, anyone have a good source for UV bulbs between 350 and 440 nm ? At a
reasonable price?
I imagine these would do the trick? They even have some fairly large UV Boxes.
http://www.bostick-sullivan.com/cart/home.php?cat=17
D***! Where did I put that UV box I bought on eBay a couple years
ago for erasing EPROMs? That might work for 4x5 Cyanotypes and
Calotypes!
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
5435
days inactive
5438
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16 comments
12 participants
participants (12)
-
blstuart＠bellsouth.net -
cclist＠sydex.com -
cisin＠xenosoft.com -
dkelvey＠hotmail.com -
geoffr＠zipcon.net -
glen.slick＠gmail.com -
healyzh＠aracnet.com -
hilpert＠cs.ubc.ca -
jlobocki＠gmail.com -
jws＠jwsss.com -
pu1bzz.listas＠gmail.com -
wdonzelli＠gmail.com