> Be aware that to erase EPROMs you need to use UV-B at 253.7 nm. The "Black
> Light" UV tubes used for entertainment (sunbeds, nightclubs, etc) are UV-A
> and don't work. I bought some UV-B tubes at my local electrical
> wholesaler.
> Ask for germicidal lamps. Hospitals use them for disinfecting. A 40W tube
> cost me about $12. The only disadvantage is that in this form it's quite
> large, more the size of an office flourescent. Then you have to buy a
> ballast, a starter and the fittings, but it still works out really cheap,
> albeit bulky.
>
> As well as UV (which you can't see), these tubes put out a visible purple
> light.
>
> Warning! The invisible UV is dangerous radiation that will harm you
> without
> you realising it! Running an exposed UV-B lamp is always bad for you.
>
> Stephen.
>
Well, many years back I bought old sun lamp from a garage sale.  It was a
very small device intended for tanning faces, it also had an infra red
heater in it which was controled separately.  That thing used to erase a
27128 in about 30 minutes.  Not exactly speedy, but it cost virtually
nothing.  I guess the lamps in these things must put out some UV-B as well
as UV-A.

Mike Rigby-Jones