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13383Re: exposure time/worn out bulbs?

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  • hersomwally
    Jan 27, 2013
      Scott-

      I checked the link you sent and couldn't find the bulb there. They did have a 15 watt "black light" bulb that would fit and according to the graph emits light in the right range. I wonder if 15w vs. 20w would make a difference?

      -Wally

      --- In PPLetterpress@yahoogroups.com, Scott Rubel wrote:
      >
      > I hope it's not ballasts. It took me a couple of hours to properly
      > replace two of them a few years ago. The machine is simple (if it's
      > like mine), but you still have to be careful and slow as you take it
      > apart, or you could disconnect wires inadvertently. The more nimble
      > your fingers, the better.
      >
      >
      > has your bulb, but there are others if you google.
      >
      > --Scott
      >
      >
      > On Jan 27, 2013, at 4:44 PM, Gerald Lange wrote:
      >
      > > Wally
      > >
      > > Do a Google search with the terms bulbs and TL44d25/09n. There are a
      > > number of suppliers.
      > >
      > > If your bulbs have a grayish-brown look to both ends, they are
      > > likely on
      > > the wane. But that would indicate that the electrics, especially the
      > > ballasts are okay. If very dark on one end, not so good.
      > >
      > > Did you check to make sure all the bulbs come on at once? or if
      > > there is
      > > some staggering problem? You might want to redo the ballasts as well.
      > > The Rocket 5 is an incredible ballast (and fairly low priced) though
      > > you
      > > might be in for a major rewiring job.
      > >
      > > A long time ago, very early on, I think Harold Kyle mentioned that
      > > Boxcar was supplying parts for Polimeros. Not sure if that is any
      > > longer
      > > the case.
      > >
      > > Gerald
      > >
      > >
      > >
      > > On 1/27/13 4:20 PM, hersomwally wrote:
      > >> I've finally gotten around to trying our Polimero A4 machine and
      > >> I've got my first (of many i'm sure) question.
      > >>
      > >> I'm using 152sb plates and the info from boxcar says to expose for
      > >> 2:30-4:00 minutes for a 17-18 on the 21 step scale.
      > >>
      > >> 4 minutes only got me to 13 on the scale, so I cranked it up to 7
      > >> minutes and it still only got it up to 16 on the scale.
      > >>
      > >> Is this normal for my machine or does this mean my bulbs are worn
      > >> out?
      > >>
      > >> The bulbs in the machine are tl44d25/09n which is a t8 20watt 18
      > >> inch. I can't seem to locate any replacements in the US. any idea
      > >> where to look? (I can't find it on atlanta light bulbs' site).
      > >>
      > >> Thanks,
      > >>
      > >> Wally
      > >>
      > >>
      > >>
      > >
      > >
      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      >
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