Advertisement
+ AVC
5
K1
Q1
3N35
1k
10n
15k
22k
1
K1
10
2k7
8p
10k
A1
2k7
10n
AVC
Tx
A3
A2
5
10
2.95 MHz
3d LO & IF
1st IF
2nd LO
17.1 MHz
Clockwise= higher freq
Red= 2 unused positions
A3
Q2
2N915
10n
100
470
10
6k8
1 pF
1
10
7pF
1k
220
1st IF
A1
20-30MHz
1
6
+25V 30mA
17.1
18.1
29.1 MHz
20 MHz
26.1 MHz
2nd LO
26.1
25.1
7p
100k
J3
Q4
1n
3N35
10n
1k
10k
Q3
3N35
15k
4k7
5 pF
10k
4k7
47pF
20pF
K2
12
100p
100k
4k7
J1
100p
1n
1Vpp RF
4k7
15k
1k8
10nF
Q5
1n
1n
3N35
10k
19.1
21.1
20.1 MHz
20p
180p
3d LO
24.1
22.1
23.1 MHz
PRC-41 First and second IF amplifier ( A2)
3 nov 2017 kb
+25V / 30mA
6
2nd IF filter
2.9 – 3.9 MHz
1k
15k
22pF
2N338
6p
2.7uH
100p
150p
6p
220p
20p
180p
1k8
1nF
J2
100p
2k7
100k
120
Q7
1n
1Vpp RF
2N338
1k
3k3
43p
100p
2.9
3.1
3.3
K3
3.0
3.2 MHz
3.8
3.6
3.4
3.7
3.5 MHz
10n
1k
4k7
500kHz output
Q6
Signal to third IF
10n
A2
1k
Coils 26V /40mA
33k
K1
3
K2
1n
K3
1k5
4k7
10nF
+12V
10nF
39k
Advertisement
