EMRFD Chapter 9 Errata.
  (17 April 09)

Chapter 9 figures:   (This applies to the entire chapter.)  Many of the schematics in this chapter are missing the semiconductor types used. The usual NPN is a 2N3904 while the 2N3906 is the PNP.   The JFET of choice is the J310, or U310 for RF.  The op-amps are LM837N or 5532 with the LM837N preferred for early stages where noise is critical. A 10 pF chip capacitor between op-amp output and the inverting input will usually cure instability.  (24Feb03, update 2Mar03, update 17Apr9)

p9.6, Fig 9.7G.  There is a corner of the box missing, just above the "G".  (20Mar03)

p9.25, Fig 9.38.  The oscillator FET is a J310, not a 4310.  (24Feb03)

p9.29, Fig 9.49.  The caption is not correct.  The caption should read "Phase errors of Fig 9.48 network pair."  (20Mar03) 

p9.29, Fig. 9.50.  The caption is not correct.   The caption should read "A pair of all-pass networks that provide at least 21 dB suppression from 360 to 2050 Hz."    (20Mar03) 

p9.34, Fig 9.62.   The caption is not correct.   The caption should read "A basic miniR2 schematic. This simplified version uses some different parts values and requires matching of the diplexer components."   (20Mar03)

p9.34.    Fig 9.62.   The problem is still here.   The problem has to do with the TUF-1 and TUF-3 mixers which have 4 pins.  A PC layout will have 4 holes in a row.  But this does not mean that it can be shoved into the board in either possible way.  This figure should explain the nature of the mixer.   Essentially, the pin that is attached to the mixer can is the grounded one and should go into the PC board hole that attaches to ground.   It's not complicated if you look at the package and then the schematic.
 The proper circuit is (17April09)


p9.34.    Fig 9.62.    There are resistor and capacitor values missing for the first op-amp in the signal chain in both channels.   Both channels are, of course, identical.    The feedback resistor is 100K, the input R is 27K, and the capacitor is 0.12 uF.   (These are the values extracted from Fig 9.66.)   The op-amp type used is a 5532 or similar low-noise part.   (17 Oct 05)      

p9.34,  Fig 9.62.    There continue to be missing component values related to the filter at the bottom of the figure.  A proper schematic is shown here.
 (17Apr9)
  
                       
p9.35,  Fig 9.64.     L1 in the figure mentions 36t on a T30-6.   This should be ignored; it is a remnant from early drafting and early experiments.    The frequency dependent data in the table should be used.    (7Jan08)  

p9.36.    Fig 9.66.   This problem remains.   The problem has to do with the TUF-1 and TUF-3 mixers which have 4 pins.  A PC layout will have 4 holes in a row.  But this does not mean that it can be shoved into the board in either possible way.  This figure should explain the nature of the mixer.
 and the circuit should be (17Apr9)

p9.38, Fig 9.69.     The two output capacitors at the top of the page, connected between the op-amp outputs and 10k resistors, should be 10 uF electrolytics.  The 0.1uF value shown in the schematic is a typographical error.  Since these capacitors are after the summing network in the phasing receiver, they are non critical, but should be near 10 uF for the ASP board to have a wide frequency response when driving medium impedance loads near 500 ohms.  They are clearly and correctly shown as electrolytics in both the layout view figure 9.70 and the photograph figure 9.71.  (19Feb07)          

p9.41, Fig 9.74.   Two dots are missing in the schematic.   Add the dots as shown in red.   (16Aug03)
 

    
p9.42, middle col., 2.5 inches up from bottom.  Replace "needed for to optimize"  with "needed to optimize" (16Dec03)

p9.43. Fig 9.78.   The power supply decoupling resistor in the lower right corner of the schematic should be 10 Ohms rather than 10K. (16Aug04)              

p9.46, Fig 9.83.   Same problem with TUF mixers.  The problem has to do with the TUF-1 and TUF-3 mixers which have 4 pins.  A PC layout will have 4 holes in a row.  But this does not mean that it can be shoved into the board in either possible way.  This figure should explain the nature of the mixer.
and this fix is  (17apr9)



p9.47, right col, 3.0 inches down from text top:   Replace "1.414 time" with "1.414 times"   (16Dec03)