CIRCUIT DESCRIPTION (continued)

Q410, AN-214, which utilizes OTL (Output Transformer Less) circuit delivering 3 watts to the speaker.


The power supply is designed to operate from either 100/110/117/200/220/234 volt AC 50/60 Hz or 12 volt DC (negative ground). For AC opera tion, +13.5 volts are supplied from full wave rectifier D408 and D409, VO6B.


The 13.5 volts are used for audio amplifier stage.


The DC voltage in both AC or DC operation is supplied to the voltage regulator Q111 , 2SD313, to obtain an extremely stable 10 volt DC supply which is used by the various circuits. The 10 volt DC is further regulated by zener diode D413, BZ-091, at 9 volts, and then supplied to the oscillators and harmonic generator circuits. When the AC supply fails, the DC voltage may be automatically supplied to the circuit through the diode D410, VO6B, which prevents the rectified DC voltage from flowing into the battery.


TOP VIEW


BOTTOM VIEW


FREQUENCY
f
1ST OSC
fo1
1ST IF
(fo1-fi1)
fi1
REF FREQ
(1MHz x n)
fh
2ND OSC
(fo1-fh)
fo2
2ND IF
(fi1-fo2)
fi2
3RD OSC

fo2
3RD IF
(fo3-fi2)
fi3
500kHz 55.5MHz 55.0MHz 3MHz 52.2MHz 2,500kHz 2,995kHz 455kHz
1,500 56.5 55.0 4 " 2,500 2,995 "
2,500 57.5 55.0 5 " 2,500 2,995 "
3,500 58.5 55.0 6 " 2,500 2,995 "
4,500 59.5 55.0 7 " 2,500 2,995 "
5,500 60.5 55.0 8 " 2,500 2,995 "
6,500 61.5 55.0 9 " 2,500 2,995 "
7,500 62.5 55.0 10 " 2,500 2,995 "
8,500 63.5 55.0 11 " 2,500 2,995 "
9,500 64.5 55.0 12 " 2,500 3,455 "
10,000 65.5 55.5 13 " 3,000 3,455 "
11,000 66.5 55.5 14 " 3,000 3,455 "
12,000 67.5 55.5 15 " 3,000 3,455 "
13,000 68.5 55.5 16 " 3,000 3,455 "
14,000 69.5 55.5 17 " 3,000 3,455 "
15,000 70.5 55.5 18 " 3,000 3,455 "
16,000 71.5 55.5 19 " 3,000 3,455 "
17,000 72.5 55.5 20 " 3,000 3,455 "
18,000 73.5 55.5 21 " 3,000 3,455 "
19,000 74.5 55.5 22 " 3,000 3,455 "
20,000 75.5 55.5 23 " 3,000 3,455 "
21,100 76.5 55.4 24 " 2,900 3,355 "
22,200 77.5 55.3 25 " 2,800 3,255 "
23,300 78.5 55.2 26 " 2,700 3,155 "
24,400 79.5 55.1 27 " 2,600 3,055 "
25,500 80.5 55.0 28 " 2,500 2,955 "
26,600 81.5 54.9 29 " 2,400 2,855 "
27,700 82.5 54.8 30 " 2,300 2,755 "
28,800 83.5 54.7 31 " 2,200 2,655 "
29,900 84.5 54.6 32 " 2,100 2,555 "
Table 3 Frequency Relationship

Return to FRG-7 Index Updated 21 June, 2001 Maintained by Kent Walker