Errata, Chapter 7, EMRFD
  (18 April 09)

p7.7, Fig. 7.13.  The 78L05 regulator has the input and outputs transposed.  (30Oct03)

 

p7.19, Fig 7.32.   Errors were discovered in the schematic.  The differential amplifier is biased with a 330 Ohm resistor instead of 1K. Further, the differential amplifier runs from the 15 volt supply rather than from the 9 V on-board regulated supply.   An updated schematic is presented with the changes shown in red.    The red changes include the toroid type error found in 2004.   Also included in the drawing are measured signal levels obtained with a Tektronix 465M oscilloscope and 10X probe. The module was terminated with 50 Ohms during measurements.  (21 Oct 05)     The third printing still shows a 100 Ohm resistor between the 100 uF on the 9 volt Zener and the collector of the left Q in the differential pair.    Zap that resistor.   (17April 09)