-------- In message <aabpjy7pfajkd...@smtpout01.dca.untd.com>, cdel...@juno.com writes:
>Here is a PIX of the optical unit from a 5065A totally removed from the >shield assembly. Nice! >Left to right: > >Lamp assy >lamp oven cylinder >lamp reflector/convection block/diffuser >Rb85 filter cell It looks like there is a square filter of some kind between the reflector and the filter cell ? I've been thinking a little bit more about power for the lamp assembly. Since I have the lamp on the bench-supply I am going to plot lamp voltage vs. photo-I because it looks like a threshold rather than a linear relationship. If that is the case, I think it will make sense to give the lamp its own adjustable voltage regulator (LM317), so the power can be reduced to what is optimal/necessary without having to take the lamp apart and change a resistor. A 1R resistor between the 22-30V supply and the LM317 will make it easy to monitor lamp current, and a 300mA short-circuit protection is a nice bonus. If need be, the regulator could start out at 20V and drop to something lower in a matter of minutes. Actually, now that I think about it, I should try to measure if it is gives better stability if I drive the lamp with constant current, constant power, constant voltage or constant photo-I... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
