Alt-BEAM Archive

Message #07835



To: beam@sgiblab.sgi.com
From: Greg Powell [mailto:gpowell@engr.uvic.ca]
Date: Fri, 19 Nov 1999 08:57:15 -0000
Subject: 1381



i am still having great difficulties with the 1381. i find it hard to
believe that so few people have had problems getting them to work. i have 3
circuits in front of me. one is breadboarded and works and the other is on a
pcb identical to the breadboard version and doesn't work. the third is
identical to the pcb and breadboard version except that it has a 0.0047uF
cap instead of a 0.047uF capacitor. i have checked components, replaced
components and resoldered till I finnaly had to give up. i did find that the
2N2222 are better than 2N3904.
so to recap:

pcb with 0.047uF -> not working
breadboard with 0.047uF -> works
pcb with 0.0047uF -> works

i am clueless, i think that when my chloroplast components get here i am
going to scrap the 1381. okay, i won't scrap it but i will give it a rest.

Grumpy till I find a solution,
Greg

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