mo@seismo.UUCP (Mike O'Dell) (03/19/84)
Power supply tolerances of plus or minus .1 volts are actually fairly common. On an 11/70 I once ran, the +5 supplies had to be within .05 volts or the machine simply didn't run, and this applies to ALL the +5 supplies, of which there were at least 10 pots to be tweeked. So, while that requirements seems stringent, modern supplies can maintain the tolerance fairly easily, and the requirement itself isn't that uncommon. -Mike O'Dell
beaucham@uiucuxc.UUCP (03/21/84)
#R:seismo:-71600:uiucuxc:25800003:000:287 uiucuxc!beaucham Mar 20 09:29:00 1984 Thanks for your comment. Apparently the problem with the National chips is that the "center voltage" varies from chip to chip, necessitating the selection of a "matched set". If all chips had the same center voltage, the problem would be much less. Jim Beauchamp, uiucuxc