You wrote:

>Clewer,Brian wrote:
>>
>> The UV tubes are not the kind I would erase my eproms with 'cause it
>> wouldn't work.  My EPROM eraser tubes are made from quartz
>> but the PCB tubes have a white coating on the inside of the tube
>> (I guess to convert the energy into a different wave length)..
>
>What kind of tubes are you using?
>If they have a white coating, this is as you say to convert the raw UV
>into different wavelength but perhaps to non-UV light. Or UV that won't
>affect your resist? They're not UV lamps for tanning are they?
>That UV is probably a longer wavelength, and less energetic at causing
>eye damage, skin cancers, and developing UV resists?

The tubes I am useing are replacement tubes for a PCB exposure box.   I
am sure they are the correct tubes.

Brian.