Heathkit FM 4 Schematic

Page 2

l/2 60T8
RFAMP

male
0-
3009
ANT

-
nan-
_

6AU6
151' LFAMP.

AI,

col {22
3592 K TWISTED _
L2 WIRE
T I
w . r 1 -
1/2 6DT8' I
c3 30 I
;: no osc MIXER |
I
7:? -_ 2:- I
T T -1.5v
+ c4 (15. . 7 I
m l
' -
C6 (15 A |
' |
_. ._.... _. .J
9.5 an .__<=%} . .
cs 8.2 (:7 5| C46
K A
3-5
2 1"
. x-I R6 R3 I
w x 220K 4.7 MEG
A
. ' (312 (1000 . I
W |
.OK |
cal 001% C17 .001 LlFD __ I
AFC
1 MEG
1:' CONTROL
- . W
R24 ago R23
0N 500K ;x
50v
OFF
AFC sw.
2.2K
--- JWW 1' JWW
IOO R26
(:37 201.50
rm
1 o
ONOFF sw.
NOTE: ALL DC VOLTAGES TAKEN TO CHASSIS WITH A
HEATHKII VACUUM TUBE VOLTMETER.
ALL VOLTAGES MAY VARY £1095 FROM INDICATED
VOLTAGES
VOLUME AND TUNING CONTROLS FULL CLOCKWISE- 117 VAC
50-60 m

ANTENNA TERMINALS SHORTED.
AFC SWITCH IN OFF POSITION.

ALL CAPACITORS MARKED IN muf UNLESS OTHERWISE
INDICATED.

ALL RESISTORS ARE 1/2 WATT UNLESS SPECIFIED
OTHERWISE.

C10, C11, C13, C16 AND C17 ARE FEED
THROUGH CAPACITORS.

ARRoWs I AT TRANSFORMERS T1, T2, T3, AND T4
INDICATE TOP SLUGS.

R27
2209

1W

1oo
C3__8_»__L_I_FD
,-

.5.
200V

C39

40
UFD

150V

4O
C4OUFD

150V

O

h
'-

.001 UF 0