Heathkit SB-10 Series - Page 47

TP Injection Test
Point
Input Signal
Injection Point
Injection
Frequency
Expected Input
for 2 VAC at top
of AF Gain Pot
Measured Input
for 2 VAC at top
of AF Gain Pot
②
Product Detector
Input
V13 pin 8 3,395 KHz -8 dBm
③
2
nd
IF Amp Input V4 pin 1 3,395 KHz -26 dBm
④
1
st
IF Amp Input V3 pin 1 3,395 KHz -61 dBm
⑤
2
nd
RX Mixer Input V12 pin 2 3,395 KHz -66 dBm
8,695 KHz
(1)
-64 dBm
⑥
1
st
RX Mixer Input V11 pin 1 8,695 KHz
(1)
-65 dBm
3,700 KHz
(1)
-57 dBm
⑦
RF Amplifier Input V10 pin 1 3,700 KHz
(2)
-78 dBm
⑧
Antenna Antenna Jack 3,700 KHz
(2)
-85 dBm
7,200 KHz
(2)
-80 dBm
14,200 KHz
(2)
-87 dBm
21,200 KHz
(2)
-87 dBm
28,200 KHz
(2)
-82 dBm
28,700 KHz
(2)
-82 dBm
29,200 KHz
(2)
-83 dBm
29,700 KHz
(2)
-82 dBm
Table 2. RF and IF Stages Expected Signal Levels
Notes:
1. Adjust the Frequency dial for maximum signal
2. Adjust the Frequency dial and Preselector control for maximum signal
3. Expected values are simply a guide based on the average values observed in several rigs
and are not based on any published specification
Signal Level Measurements Page 47