Main Unit - Yaesu FT-8800R Technical Supplement

Circuit Diagram
[+3.0 dBu]
[-1.4 dBu]
[+17.2 dBu]
0.29 V
8.56 V
0.63 V
1.36 V
8.55 V
[+16.9 dBu]
4.96 V
0.80 V
[+2.7 dBu]
0.29 V
8.27 V
0.64 V
8.57 V
3.09 V
(+18.4 dBu)
0.34 V 8.11 V
0.96 V
(+18.3 dBu)
8.12 V
0.33 V
(-4.3 dBu)
(+4.0 dBu)
8.11 V
0.33 V
8.14 V
0.31 V
7.78 V
0.68 V
0.75 V 8.71 V
0.68 V
8.73 V
(-8.5 dBu)
[-9.3 dBu]
(12.68V)
[12.80 V]
(12.80V)
[12.88 V]
(11.68V)
[11.66 V]
( ) : 145.050 MHz
[ ] : 433.05 MHz
45.05 MHz
(+25.3 dBu)
[+24.3 dBu]
[+13.4 dBu]
1.5 V
0.37 V
1.09 V
4.78 V
[+11.7 dBu]
1.50 V
1.20 V
1.15 V 0.49 V
4.01 V
47.25 MHz
(+15.0 dBu)
[+14.9 dBu]
47.25 MHz
(+23.7 dBu) [+23.6 dBu]
0.97 V (+16.5 dBu)
1.54 V
0.42 V
5.84 V
1.20 V
1.55 V
0.41 V
5.56 V
0.96 V
(+16.7 dBu)
0.68 V
2.80 V
2.80 V
0.68 V
0.66 V
4.68 V
0.66 V
3.22 V
(3.52V)
[3.32 V]
(2.95V)
[3.66 V]
45.05 MHz
(+15.3 dBu)
[+14.8 dBu]
0.83 V
0.12 V
4.97 V
45.05 MHz
(+27.5 dBu)
[+26.9 dBu]
4.84 V
2.23 V
0.65 V
4.81 V 4.84 V
0.79 V
0.79 V
2.20 V
0.21 V
0.61 V
0.21 V
Wide:
2.40 V
Wide:
Wide:
2.40 V
1.73 V
Narrow:2.76 V
0.83 V Narrow:
4.97 V
2.09 V
Narrow:2.76 V
0.12 V
47.25 MHz
(+26.8 dBu)
[+26.9 dBu]
2.23 V
0.79 V
0.79 V
4.84 V
AM 4.52 V
4.77 V
2.20 V
0.65 V
4.81 V 4.84 V
0.20 V
0.61 V
0.69 V
4.78 V
Wide:
2.38 V
AM 4.52 V Wide:
2.38 V
Narrow:
2.73 V
Wide:1.71 V
Wide:1.71 V
Narrow:2.73 V
Narrow:2.05 V
0.70 V Narrow:2.05 V
4.70 V
6.64 V
4.70 V
6.64 V
7.12 V
1.05 V
AM 3.33 V
1.35 V
AM 1.95 V
1.91 V
0 V
AM 3.70 V
1.91 V
1.36 V
AM 1.97 V
1.89 V
0 V
AM 3.53 V 1.05 V 1.89 V
AM 3.16 V
PK-A 2.32 V
Wide:4.13 V
PK-A 2.39 V
Wide:1.73 V Narrow:4.88 V
PK-B 2.27 V
Narrow:2.09 V
PK-A 1.39 V PK-A 1.42 V
PK-B 1.48 V PK-B 1.50 V
0.95 V
0.97 V
0.90 V 0.91 V
Wide:4.11 V
Narrow:
4.81 V
1.81 V
1.81 V
8.82 V 8.87 V 8.86 V 8.85 V 8.86 V 8.86 V
8.72 V
8.68 V
8.81 V
4.87 V
4.78 V 4.92 V 4.83 V 4.92 V 4.93 V

MAIN Unit

AF VR-B:0~4.7 V
13.78 V
1.91 V
13.00 V
3.22 V
3.58 V
13.56 V
1.89 V
8.41 V
3.58 V AF VR-A:0~4.7 V
3.22 V
6.47 V
1.35 V
PK-B 2.41 V
1.28 V
8.85 V
0.52 V
1.75 V
1.73 V
4.67 V
1.78 V
FAN on:11.98 V
off:13.78 V
1.81 V
8.82 V 8.86 V FAN on:4.14 V
off:0 V
FAN on:0.18 V
off:13.53 V
8.81 V
5.64 V
8.95 V 13.78 V
4.99 V
13.10 V
13.06 V
4.83 V 5.53 V
5.01 V
13.80 V
0.57 V
0.12 V
0.69 V
4.28 V
4.78 V
4.94 V
4.49 V
4.91 V
4.92 V
17