WTB: Low cost UV EPROM eraser with timer

C

Commander Dave

Guest
Lost most of my electronic equipment <insert long sob story here> and am
looking for someone that has an old UV EPROM eraser they would like to part
with cheap. It needs to be working and have a timer. Please email to
cmdr-dave@spamcop.net.

Thanks!
-Commander Dave
 
Commander Dave wrote:
Lost most of my electronic equipment <insert long sob story here> and am
looking for someone that has an old UV EPROM eraser they would like to part
with cheap. It needs to be working and have a timer. Please email to
cmdr-dave@spamcop.net.

Thanks!
-Commander Dave
Click to expand...
Use a standard fluroescent lamp; for more UV, replace the bulb with a
UV bulb.
Get a timer at an electrical store.
 
heinzf_lenk@web.de (Heinz Lenk) wrote in
news:b28db2b4.0407040955.39e75f8d@posting.google.com:

"Commander Dave" <cmdr-dave@spamcop.net> wrote in message
news:<10edscp84lrqo42@corp.supernews.com>...
Lost most of my electronic equipment <insert long sob story here> and
am

Take the tube of a sun-ray lamp (from a fleemarked) and connect it via
a 1N4007 diode to a 30V power supply with current limiting set to 1A.
Start the tube with 250V DC in series with a 10kOhm/5W resistor.
The diode will prevent the 30V-power supply from beeing zapped.
The ark will burn with ca. 22V and you will smell ozone .
Remove the 250V.
Cool the tube with a fan to prevent the arc-voltage to jump to 80V
(normal condition).
EPROM erasure takes 15 minutes.

Heinz Lenk
Click to expand...
I have used a fluorescent UV germicidal bulb. Takes a while but it gets
the job done. Dont forget to short out the prom pins with something
conductive while erasing.

r

--
Nothing beats the bandwidth of a station wagon filled with DLT tapes.
 
In article <Xns95237B479B626mc2500183316chgoill@10.232.1.1>,
spmaway@ylhoo.com says...

Dont forget to short out the prom pins with something
conductive while erasing.
Click to expand...
I haven't heard this before. What's the reasoning?

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------
 
John Miles <jmiles@pop.removethistomailme.net> wrote in
news:MPG.1b5b792e58caf1e9896d7@news-central.giganews.com:

In article <Xns95237B479B626mc2500183316chgoill@10.232.1.1>,
spmaway@ylhoo.com says...

Dont forget to short out the prom pins with something
conductive while erasing.

I haven't heard this before. What's the reasoning?

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------
Click to expand...
To be honest, I am not sure why. I have had issues when I did not have
the prom in a conductive carrier while erasing. Now that I think about
it, it could be just an old wives tale. All of the prom erasings units I
checked have a conductive tray.

r


--
Nothing beats the bandwidth of a station wagon filled with DLT tapes.
 
Hi!

I've got a Stag SE15 and that doesn't have any conductive material in
the tray - trust it to be awkward :)

It's got slots where the IC legs sit in a flat metal tray.

Yours, Mark.

Rich.Andrews wrote:

John Miles <jmiles@pop.removethistomailme.net> wrote in
news:MPG.1b5b792e58caf1e9896d7@news-central.giganews.com:


In article <Xns95237B479B626mc2500183316chgoill@10.232.1.1>,
spmaway@ylhoo.com says...


Dont forget to short out the prom pins with something
conductive while erasing.

I haven't heard this before. What's the reasoning?

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------



To be honest, I am not sure why. I have had issues when I did not have
the prom in a conductive carrier while erasing. Now that I think about
it, it could be just an old wives tale. All of the prom erasings units I
checked have a conductive tray.

r
Click to expand...
 
In article <40E7A05C.3DC9ED7F@earthlink.net>,
Robert Baer <robertbaer@earthlink.net> wrote:
Commander Dave wrote:

Lost most of my electronic equipment <insert long sob story here> and am
looking for someone that has an old UV EPROM eraser they would like to part
with cheap. It needs to be working and have a timer. Please email to
cmdr-dave@spamcop.net.

Thanks!
-Commander Dave

Use a standard fluroescent lamp; for more UV, replace the bulb with a
UV bulb.
Click to expand...
That would be pretty damn necessary. Here's three datapoints from
my experience.

A G15T8 Germicidal lamp in an $8 below the shelf fixture, 3 minutes.
A tanning bed lamp 45 minutes.
A blue filter /BLB "poster lamp", 3 1/2 DAYS. (2716/2764 vintage EPROMS).

The BLB (and BL) lamps are UV enhanced with a peak at 350 nanometers,
so an ordinary fluorescent lamp would take bloody forever.

Tanning lamps peak at 300 nanometers or thereabouts, a Germicial has a
strong mercury line at 258 nanometers.

Get a timer at an electrical store.
Click to expand...
Probably most convenient would be to get a G8T5, (or G6T5, depending) lamp
that will fit in slimline fixtures or a battery powered safari light,
or a G4T5 that will fit into (I think) those plug in the wall night
lights. Probably $30, single quantity, at a specialty lamp supplier.
Maybe cheaper at a barbers' supply or aquarium supply store. Or E-Bay.

Mark Zenier mzenier@eskimo.com Washington State resident
 
Thanks for all the advice, but I really didn't want to build one. I wound up
getting a very cheap one on Ebay for $10.

Cheers!
-Commander Dave

"Commander Dave" <cmdr-dave@spamcop.net> wrote in message
news:10edscp84lrqo42@corp.supernews.com...
Lost most of my electronic equipment <insert long sob story here> and am
looking for someone that has an old UV EPROM eraser they would like to
part
with cheap. It needs to be working and have a timer. Please email to
cmdr-dave@spamcop.net.

Thanks!
-Commander Dave
Click to expand...
 
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