Radio-Frequency Electronics, Jon B. Hagen, Cambridge Univ. Press, 1996 (First Printing; All of these were corrected in second printing in 1999.)
p. 14, 4th line of text: 1/Q_eff = 2/Q_EL" (Second slash missing.)
Page 216: Equation (22-4a) is missing a "j" after the 2nd "=".
The rest of this list only applies to the first printing; all of these have been corrected in the second printing which became available in January 1999.

p. 8, 12th line from the top of the box: "R=0 GOSUB 500" should read "R=0: GOSUB 500"
p. 36, Figure 4-6: The inductor should be labelled 3.18 mH rather than 3.18 uH.
p. 38, Figure 4-8: The two lower capacitors are ".319 uF" not ".319 uH". The top inductor is "1.59 mH" not "1.59 uH".
p. 47, Equation 5-2: Two typos: First line is missing the subscript "L" after the second omega in "omega sub 1+omega". The end of the first line is missing "omega" before the subscript "L".
p. 59, Halfway down the page: 0.500 kHz should be 0.500 MHz.
p. 99, Third line from the bottom: Change "point 4" to "point 3".
p. 152, Figure 16-3: Beginning from the left, the trace labeled VA should be equal to Vout (not Vb), then Vb (not Vout), then zero (ok as drawn) and then Vout (not Vb).
p. 152, two lines above Equation 16-2: move "/L" from the left side to the right side of (Vb-Vout).
p. 152, Equation 16-2: Replace ")" by "-1)"
p. 153, Equation 16-5: Replace Vb by -Vb
p. 307, Equation 29-8: "j omega sub zero" should be "j omega epsilon sub zero" as in the term immediately to the right of the second = sign.
p. 335 Problem 2: "sigma" in the expression "sigma square root (2/N)" should be "sigma squared" (the exponent "2" is missing).
p. 186, Figure in Problem 3: Three typos: The two lower capacitors are ".319 uF" not ".319 uH". The top inductor is "1.59 mH" not "1.59 uH".
p. 196, Figure 20-12, center section: the "270" at the lower right corner of the square should be "90".
p229, Figure 23-4: The arrowheads on the middle three vertical lines in the narrow waveguide wall should point up rather than down. (These arrows fall below the letters "G", "I", and "D" in top banner "WAVEGUIDE CIRCUITS" Also the first three arrowheads near the left side of the top wall should point to the left instead of the right.
p. 264, Figure 25.4, right hand side: the last two arrows (I and V at t6) should point to the right rather than to the left.
p. 265, first line: "126pF" should be "1250 pF".
p. 272, Figure 26-5, right-hand most box: interchange the "0"s and the "90"s.
p. 295, two lines above equation 28-4: "phi_N(t)" should be "S_phi" ("S" subscript "phi")
p. 295, Equation 28-4: "6k" should be "6k_0" (missing subscript zero after the "k").
p. 297, two lines above Equation 28-9. Change "Nyquist's" to "Shannon's"
p. 183, Figure 19-14: Change "o.5" to "0.5" and change "0.2175" to ".02175"
p179 line 4: change "Z subscript 0 / Z" to Z superscript 2 subscript 0 /Z" (i.e. the Z0 should be squared).
p233, 12 lines from the bottom: reverse the "less than or equal to" sign , i.e change "<" to ">"
p235, second line from the bottom: change "maximum" to "minimum"
p236, 4 lines below "HIGHEST POWER": Change "60 ln (1.65)/2" to "60/2" (delete "ln1.65")
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p33 "first n-1 derivatives" should be "first 2n-1 derivatives"
p64 Second line (only) of Equation 7-1. The term in large brackets should be squared (the superscript "2" is missing.).
p86, Figure 9-8: The outermost dashed arc extends 180 degrees too far. It begins properly at the right-hand end of the x-axis and proceeds clockwise nearly 300 degrees. It should end 180 degrees sooner, at the intersection of the arrowed arc and the arrowed circle.
p79, 5 lines from the top: change "where phi = theta" to "where phi = -theta" (missing minus sign).
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p76 Figure 8-5: the "+" sign in the right-hand side of the "I(x)=..." equation should be a "-" sign.
p82, Figure 9-1: "Z=0-jZo" just above the word "short" should be simply "Z=0".
p204, Figure 21-3, lower right corner: The fraction bar should not extend under the term "NF1"; instead, the bracketed term should be "[ NF1 + (NF2-1)/G1 ]".
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p183, Figure 19-14: change "71.3 pF" to "713 pF"
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202, Figure 21-1: In the left hand figure, the voltage generator (circle) should be in series with the resistor rather than in parallel.
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Direct comments to Jon Hagen.
Last modified on May. 14, 1998.