5-10
5.8 METER/SWITCH BOARD A12 (81947) and DISPLAY BOARD A13 (81952)
This board contains the metering circuits for the front panel meters. A12S1 selects the
parameter to be monitored. This selection is then sent to multimeter M1. The multimeter has
three calibrated scales for measuring plate voltage, screen current and forward or reflected
RF power. The KW scale should be divided by ten when measuring reflected power.
A12U1 samples screen and control grid current and drives the appropriate LED to indicate
excessive current of either screen or control grid. Q1 samples forward RF power voltage
from the SWR board. This voltage is peak-held by C8 and sent to U2 to drive the peak
reading display LEDs on DISPLAY BOARD A13.
FIGURE 5-13 METER/SWITCH BOARD (ASSEMBLY A12) COMPONENT
LAYOUT VIEWED FROM FRONT PANEL SIDE
FIGURE 5-15 DISPLAY BOARD (ASSEMBLY A13) COMPONENT
LAYOUT AND TOP CIRCUIT VIEWED FROM TOP
U1 GRN
1
U2 GRN
U3 GRN
U4 GRN
U5 GRN
U6 GRN
U7 RED
Содержание TITAN III 417
Страница 19: ...2 6 BAND FREQUENCY LOAD TUNE ANTENNA NOTES FIGURE 2 2 MODEL 417 TUNING LOG ...
Страница 20: ...2 7 FIGURE 2 3 TITAN III FRONT VIEW FIGURE 2 4 TITAN III REAR VIEW ...
Страница 21: ...2 8 FIGURE 2 5 TITAN III TOP VIEW ...
Страница 22: ...2 9 FIGURE 2 6 TITAN III BOTTOM VIEW ...
Страница 32: ...5 7 FIGURE 5 8 QSK BOARD ASSEMBLY A11 TOP AND BOTTOM CIRCUIT TRACES VIEWED THROUGH BOARD FROM TOP ...
Страница 38: ...5 13 TOP COPPER BOTTOM COPPER FIGURE 5 18 AC LINE DELAY BOARD ASSEMBLY A9 CIRCUIT TRACE TOP VIEW THROUGH BOARD ...
Страница 40: ...5 15 FIGURE 5 21 SCHEMATIC DIAGRAM MODEL 417 ...
