Feedback - August, 2003 QST
In the Integrated Timer experiment in
"Hands-On Radio" (Jun 2003 QST, page 59), the actions of the set and
reset functions of the flip-flop are reversed. Correctly stated, when the set
input (trigger comparator output) changes from low to high, Q goes low. When
reset (threshold comparator output) changes from low to high, Q goes high.--Dan
Ferreira, N1BMA
In "The Protector" schematic (Jun 2003 QST,
Figure 1, page 56), resistor R13 (10 k 
)
was omitted. It should be in series with pin 2 of U2A (LM358) after the
junction of R11, R12 and C3.--Arnaldo Drummond, PY5AQ
Page last modified: 02:42 PM, 16 Jun 2003 ET
Page author: qst@arrl.org
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