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From: markz@ssc.UUCP (Markz Zenier)
Newsgroups: rec.ham-radio,sci.electronics
Subject: Re: build-it-yourself EPROM erasers (Just the facts)
Message-ID: <1034@ssc.UUCP>
Date: 21 Feb 88 21:41:53 GMT
References: <8802091255.AA23298@ucbvax.Berkeley.EDU> <12@ucsd.EDU> <3244@arthur.cs.purdue.edu>
Organization: SSC, Inc., Seattle, WA
Lines: 24
Summary: Light bulbs for erasing eproms


There are three types of flourescent lights that produce enough UV to zap
EPROMS.

The Black Light and Black Light Blue Phosphor peaks at 350 nanometers and
will take 3 1/2 days (Back in my starving student days I was patient)
These bulbs are typed FnnTn/BL or FnnTn/BLB.  
The first number is the wattage, the second the Tube diameter in 1/8ths of
and inch, and the phosphor is the Alphanumeric code at the end.
The BL produces visible light. The BLB is the good old poster light with a
purple filter.

The Sunlamp Phosphor peaks at 300 nanometers, and should take less time to
erase the PROMS.

Germicidal Lights are just the raw mercury plasma in a quartz tube and
take 3 to 6 minutes to erase a prom sitting on the tube. 
They are numbered G??T??  and plug in to the same fixture as the equivalent
F numbered flourescent tube.
They peak at the 250 nanometer wavelength.

Recomendation: Buy the Heathkit, the cost of the parts is about the same.
A germicidal lamp at a speciality lamp house will run $30 to $50.  A lot
for a flourescent lamp with half the stuff left out.