Version 4
SHEET 1 2612 820
WIRE 1184 -320 1168 -320
WIRE 1520 -320 1264 -320
WIRE 1632 -320 1520 -320
WIRE 1520 -304 1520 -320
WIRE 1168 -208 1168 -320
WIRE 1168 -208 544 -208
WIRE 1184 -208 1168 -208
WIRE 1312 -208 1264 -208
WIRE 544 -176 544 -208
WIRE 1312 -80 1312 -208
WIRE 1344 -80 1312 -80
WIRE 1520 -80 1424 -80
WIRE 1632 -80 1520 -80
WIRE 1520 -64 1520 -80
WIRE 544 -32 544 -96
WIRE 784 -32 544 -32
WIRE 784 -16 784 -32
WIRE 1168 -16 1168 -208
WIRE 1360 -16 1360 -32
WIRE 1360 -16 1168 -16
WIRE 1408 16 1408 -32
WIRE 784 112 784 64
FLAG 1632 -320 MP1
FLAG 1632 -80 MP2
FLAG 784 112 0
FLAG 1408 16 0
FLAG 1520 -224 0
FLAG 1520 16 0
SYMBOL voltage 784 -32 R0
WINDOW 3 -81 99 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 -81 127 Left 2
WINDOW 0 -69 14 Left 2
SYMATTR Value SINE(0 8 1455k)
SYMATTR InstName LO
SYMBOL res 1280 -224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL voltage 544 -192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 8 1000k)
SYMBOL sw 1440 -80 M270
SYMATTR InstName S1
SYMATTR Value SW1
SYMBOL res 1504 -80 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 1504 -320 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 1280 -336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 1k
TEXT 1040 0 Left 2 !.tran 0.1m
TEXT 1304 -416 Left 2 ;Superhet
TEXT 448 -208 Left 2 ;Sender
TEXT 1040 120 Left 2 !.model SW1 SW(Ron=0.1 Roff=10G Vt=0.001V Vh=-0.001)
RECTANGLE Normal 720 96 928 -48 2
RECTANGLE Normal 432 -48 640 -192 2
RECTANGLE Normal 2496 -384 672 144 2