Heathkit SB-401 Assembly Manual page 174

1. MAY VARY.
2. CHASSIS GROUND.
3. FILAMENT.
4. VARIES WITH SETTING OF LEVEL CONTROL.
5. VOL TAGE PRESENT ONLY ON LSB.
6. TUBE IS CUT OFF.
7. VOL TAGE DEPENDS ON AMPLITUDE OF HETERODYNE MIXER INJECTION.
8. VARIES WITH CRYSTAL ACTIVITY AND HETERODYNE OSCILLATOR COIL SETTING.
9. PENTODE SECTION OPERATES ONLY IN TRANSCEIVE.
10. RELAY NOT CLOSED.
11. OPERATES ONLY WITH KEY DOWN IN CW MODE.
12. GROUNDED BY THE FUNCTION SWITCH.
13. VARIES WITH SETTING OF VOX CONTROL.
14. VARIES WITH SETTING OF ANTI-VOX CONTROL.
15. VARIES WITH VOL TAGE IMPRESSED ACROSS DIODE.
16. GROUNDED BY MODE SWITCH.
17. VARIES WITH SETTING OF BIAS ADJUST CONTROL.
1~. HETERODYNE OSCILLATCR INPUT FROM RECEIVER IN TRANSCEIVE ONLY.
19. VOL TAGE IN TRANSCEIVE ONLY.
20. VARIES BETWEEN LSB, USB, CW, AND TUNE.
21. PROVIDES BIAS VOL TAGE TO UNBALANCE BALANCED MODULATOR.
22. TO CHASSIS.
23. INFINITY IN USB OR LSB.
24. APPROXIMATELY 50 K AFTER A FEW SECONDS IN LSB OR USB.
25. GROUND IN CW AND TUNE.
• MINIMUM AFTER 5 SECONDS
•• APPROXIMATELY
SWITCH AND MEASUREMENTS CO~TDITIONS
CONTROL
(
)
I I
0
C
)
POSITIONS
--~-
FUNCTION
STBY SPOT TRCV OFF
BAND 3. 5
MODE CW CW
DRIVER Full counter-
clockwise dial Tuned
marking
FINAL LOAD
50
Q
FINAL
80
LEVEL Fully
Fully
clockwise clockwise
-METER
RELPWR
RELPWR
LMO
0
KEY
OPEN OPEN
VOL TAGE AND RESISTANCE CHART NOTES
Page 146