HP 606A Operating And Service Manual page 61

Section IV
Figure 4-9
ew.
Model 606A
C40 68
+ 300V
SI
KTAL1
C41
C51
5600
5-20
SI
1100K
Cl
225V
-72V
VIO
6AW8A
CRYSTAL
OS C
ILLATOR
AND MIXER
I CRYSTAL CALIBRATOR
I
R42
100K
C44
#75V .05
J
iF
V9B
1/
2
12AT7
BEAT FREQUENCY
+ 300V OUTPUT
R45
33K
+120V
R44
470K
4
— FROM .477 ENUATOR
RF PICKUP
MOD
OSC AD J
PSI
1000
R50
56K
,
e
R52
52200
2
OV
C50
5600
R58 , - — •
Ç
71.56K / / 75K
*MA
O
1 / 0".x'e."1
R59 R56
0
28.4K
28.4K
!
:J1
RFD
V5
12AT7
AUDIO
OSCILLATOR
r. 100V 'en.
6 L
cm-
.
BLACK
_. I,
4 9 150K
,*"." + 300V
R48 6
' 3300 •
I OV
7
1
/ '
.... .....
.2.6V
<
R49
8
A # 4.8v
> 560K
C46 V
0.1 LLF
GREEN
RI
I
OV
S6
o
T 1
YEL LOW
R47
680
MODULATION
SELECTOR
— — r
—
— — — — —
.-0 raoc», —0 i
a-04-1-e
1000.v
—0
'71
-
V
COPYRIGHT 1939 SY
112WIITT.PACKASD COMPANY
606A UK
(1
Of 2)-T03501
—200V
R53 R54
82K 1000
i+ 300V
V9A
4
2
12AT7
\ MODULATION MONITOR
1 2
+3.9V
• CR5
IN90
IC19
EXT-DCI
EXT-ACI
OV
O
C52
I p.,F
MODULATION
AMPL ITUDE
0 V
P69
I5K
0 V
o
o
o
R57 680
PHONES'
300V
e
R68
30K
- 200V
2.4V
MOD ZERO
SET
Figure 4-9. Signal Generator ( Sheet 1 of 2)
MEASUREMENT CONDITIONS
Line voltage set at 115V, 60 cps.
Frequency dial set at I me.
MODULATION SELECTOR set at INT. I Re;
30% modulation,RF output terminated into 50
ohms load. Voltages shown are for guidance;
value may vary from those shown due to tube
aging or norrhal differences between instru-
ments. DC voltages were measured with a
voltmeter having an input resistance of 122
megohms and are shown with respect to chas-
sis ground. Waveforms measured with
9
Model 150A Oscilloscope, Model 152B Dual
Trace Preamplifier, and AC- 21A Probe to ob-
tain 10 megohms input Impedance.
4-18
00170-2