Majestic Radio & Telev. Corp. 10FM891 Schematic

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Product Information:
Model:10FM891
Manufacturer:Majestic Radio & Telev. Corp. (Grigsby-Grunow)
Description:10C23E

Schematics Content:

Please note: this content is a computer-generated interpretation of the above schematic and is provided only to help assist you in locating this schematic. For the actual text, please consult the schematic above. Thank you.

Page 1:

PAGE 20-14 MAJESTIC
MODEL IOFMBQ1,
sg = _ " Page = = W
o John F. Rider

Page 2:

MAJESTIC PAGE 20-I5
MODEL 1oFv~891J
moo KC TS MC LB MC AB MC
LOOP
6 BAG IO7 MC
SPEAKER
SOCKET
PHONO JACK | 2 3 4 AI A2 M DIPOLE
TUBE LAYOUT
SHOWN VITN COPIDEIISER
PLAYES FULLY OPEN
IQ TURNS
DIAL SYNIMING
\ 54 TURNS
FIGURE I FIGURE 2
o John F. Rider

Page 3:

MODEL lOFI`I8Ql,
?" EE] 31: ?u> 9mm gum Swag Sdn: 33.-4 ooii ?<?oo?$~ 'Egg TJ
:Q Q. ? had r-.mg uwg pmg 2 ngg x<:`>? oil) ?5 mg' ag" 3'
A 22 W saaesasasss seam efs eaaama., 2'?T=*?"? Hs; 3%
one mv: \/
*ag aim
Q49 O 'U 'U N0 P423 $4 HUD 5-

Page 4:

MAJESTIC PAGE 20-`|7
MODEL lOFN8Q1,
/`. Measurements made at 117 volts line; volume control at minimum; zero
signal input. Measurements made to chassis ground with vacuum tube voltmeter.
TUBE ELEMENT PIN NO. VOLTAGE
plate 5 175
SBA6 screen grid 6 B3
R.F. AMP.(F.M.) cathode '7 .95
control grid 1 O
plate 5 180
GBE6 screen grid 6 97
con ro gn
csc. injector grid 1 ' 3.2 to 3.5
plate 8 2.40
SSG7 screen grid 6 195
control grid 4 -.7
plate 3 215
6SA'7 screen grid 4 90
/" (R)N'VERTER (A.M.) cathode 6 O
control grid 8 -1.0
osc. injector grid 5 " -13 to +3.6
plate 8 215
GSG7 screen grid 6 130
1st I.F'. AMP. cathode 5 & 3 O
control grid 4 -1.3
plate p 8 190
6SG'7 screen grid 6 105
&1d LF. AMF. cathode 5 Sf 3 1.2
control grid 4 O
plate 8 27
6SI>?7 screen grid 6 40
LIMITFIR cathode 5 If 3 O
control grid 4 ' O
GSB plate 6 64
DISC. -AM DET. cathode 2 O
lst LF. AMP. control grid top cap -0.8
plate 3 %O
GV6 screen grid 4 270
OU'1'PU'I' cathode 8 13
control grid 5 0
plate 4 350-A.c.
5YS/SU4 late 6 (50-A.C.
80 MA _'g Drain, * The Following chart is reference oscillator grid;
Oscillator voltage varies with frequency.
'Band sw. Tube Frequency [ Voltage
min no PART nd. 1iEscR|PT|on
czibicac. v-iv Ganged waning condenser A.M. a rm. _ ~ ~ - - - - >>
C3,C8,C10. B-38 Trimmer 3-13 mmf (Gang trimmers). . . . . . . . . .
C4,C55,C'71 6-159 4'7 mmf., 503 V ceramic wi Condenser- - - - - - - -
6-143 24 mn 500 ceramic 1 5 Con ser. . . . . . . . .
C11 O21-15 1O{X) mmf 5(1) V mica 55 Condengzdr. . . . . . . . . .
C12 6-199 15 mmf 500 V ceramic 5| Condenser - ~ - - - - - ~ -
C66;C6'7;C'79;CB2: ' O17-5 .oi mfd aoov paper condenser . . . . . . . . _ . _
C15,C16,C51,C5S. ..... Part of T2 1s .F'. transformer. ~ . _ . . . . . .
c1'7,c2z,c2e 6-231 .002 mfd 4.60 v ceramic 105 Condenser . . . . . . . .
C18,C19,C45,C4'7. ..... Part of T3, 2nd LF. transformer. . . . . . . . . .
C21,C24,C25 ..... Part of T4, 3rd LF. transformer. . . . . . . . . .
" ` C2t?,C2Q,C3O ..... Part of T5, Discriminator transformer . . . . . . .
C31 O20-39 100 mmf 500 V mica 2.05 Condenser. . . . . . . . . .
C32,C4O,C46 OZ)-53 23) mmf 500 V mica 204 Condenser. . . . . . . . . .
C33,C49 'O16-6 .02 mfd 400 V paper Condenser . . . . . . . . . . .
C38 017-4 .OO5 mfd 600 V paper Con enaer. . . . . . .
0 John F. Rider

Page 5:

PAGE 20-1 ESTIC
MODEL IOFMSQ1,
ITB4 ||0_ PART NO. DESCRIPTION
C42 OZ)-6'7 4'7O mmf 5CD V mica Conden er. _ _ _
C43 19-35 w mfd 450 V e1ectr?;t1c Condenser _ _ \_/
O14 O21-20 12130 mmf 500 V mea Condenser _ _ _ _
C5O,(!iB 0168 .05 mfd 500 V paper Condenser _ _ _
C56 6-207 2% mmf 50? V ceramic condenser _ _
CGOZC7() 6-208 234 mmf 50) V mica condgnsezn _ _ _
(B1,C62,C63,065 _.___ Part of 'I'7 ooil assembly. .__ _ _ _
O69 _____ Part of T8 coil assembly. _ _ _ _ _ .
C71 ...__ Part of gil cci1,assembly (47 mmf.). _
C72 B-35 25-3) mm ceramic trimmer _ _ _ _ _ _ _ _ _
C81 8-63 15-115 mm trimmer (wave trap). _ _ _ _ _ _ _
L1 20-27 Broadcast loo assembl (less cover #2/O-28 _ _
L2 Loading coil gpart of go-27 loop) _ _ _ _ E .
L4 3-189 F_M. oscillator coil. _ _ _ _ _ _ _ _ _ _ _
L5 3-171 A_M_ oscillator coil. _ _ _ _ _ _
D6 S-1468 Wave trap coil. _ _ _ _ _ _ _ _
R1 O2-37 68 ohms imwatt 10; resistor . _ . _
R2 O3-157 47 OCX) o s 1 wat 2O$ resistor _ _
Rs,R11,Rs'7,R4.2 O3-118 51-sbo ohms 1 watt 1O$ resistor _ _ _ \
R4 01-2 10 ohms 4 watt 10% resistor _ _ _ -/
R5,R41 O1-148 22,000 ohms ig wat mi resistor
R6,R4O O4-143 22,000 ohms 2 watt Z); resistor _ _
R'7,R39 O2-143 22,000 ohms watt 205 resistor _ _ _ _ _
Ra,R1o,R4a 02-156 4'7,0<1) ohms watt 1O$_resistor _ _ _ _ _
R9 O2-41 S2 ohms i* wa t 10% resistor _ _ . _ _ _ _ _
R12 ___'__ Part of 4 assemb y (47,000 ohms ? w 105) _
R44,R45 O2-199 470 OOO ohms 5 watt 20; resistor. _ _ _ _
R14 O2-149 sa boo ohms 4 watt 104 resistor _ _ _ _ _ _
R15,R16 O2-170 106 OOO ohms Q watt 10; resistor. _ _ . _ _
R1'7,R19 _.___ Part of T5 assembly (4 0,000 ohms 5 w 105). _
R18 02-157 47,000 ohms Q watt 201 resistor _ _ _ _ _ _ _
R21 02-255 10 megohm il watt 205 resistor _ _ _ _ _ _ _
R22 13-25 Volume con rol, 2 megohm with tap _ _ _ _
R23 O2-132 12,000 ohm i watt 105 resistor, _ _ _ _
R24 14-'7 Tone contro 2 megohm, with switch. _ _ _
R36 O2-213 1_1ne?ohm 5 watt 2O?~resiStor. _ _ . _ _ _ _
R30 9-290 25) ohm 6 watt %Q5 wire wound resistor. _
R34 O1-160 56 OOO ohm _, watt 105 resistor. _ _ _ _
R50 oz-44 106 ohm 1 watt 105 resistor _ _ _ _ _ _
RFC-1 3-187 SEAS plate choke. _ _ _ _ _ _ _
RFC-2,RF'C-3 3-188 Filament choke. _ _ . _ _ _ _ _ _
RFC-4 8-104 Diode plate choke _ _ _ _ _ _ _ _ _ _ _ _ _
S1 11-58 Band switch 'R_F`_). . _ _ _ _ _ _ _ _ _ . _
S2 11-59 Band switch (pilot lites & audio) _ _ _ _ _ _
S3 _..._ Part of Tone control assembly, A_C_ switch. _
T1 3'~183 F.M_ antenna transformer. _ _ . _ _ _ _ _ _
T5 3-176 Discriminator transformer _ _ .
T6 2-9 Power Transformer (lst. run). _
T6 2-1,9 Power Transformer (2nd. run). _ _ . . _ _ _
T8 3-185 334. antenna transf rmer_ _ .... _ _ _ _ _
T9 52-58 tput transformer (Fpert of speaker ass'y.1 _ _
26-2 Dial lite 2#4'7 rown bead). _ _ _ _
26-'7 D181 lite #44 blue bead _ _ _ _ _ \
16-34 Tube shield for GBA6 lf $216 tubes _ \/
135-35 D1a1 pointer ass'?_ _ _ _ _ _ _ _ _
138-15 Dial scale separa er._. _ _ _ _ _ _
1%-56 Dial cord tension spring. _ _ _ _ _ _
S1329 Dial cord, 62 inches long H4134-'7). _
_ _ s e uni con enser ass __ _
"Q-58 Speaker, 12" complete with output transformer _ _
115-62 Cabinet, combine ion console Walnut _ _ _ _
S-1610 Cabinet dipole antenna ass'y_ _ _ . _ _ _
21-15 Record changer VM-400 (lst. run). _ . . _
21-37 Record changer VM-402 (2nd_ run). _ _
1%-53 Dial escutc eon clamp _ _ _ _ _ _ _
1&-54 Escutcheon glass (large). _ _ _ _
117-103 Dial Masking late. _ _ . _ _ _
129-46 Spring; for band switch lmob_ _ _ _ _ _ _ _ _ . _ _
" Speakers marked with a BLUE X have a change of wiring; ref; s eaker 1 and chassis
socket, pin #2 interchanged with pin #5_ Change refers to EARLY RUN'pSiEjgS ONLY. ~
(C)John F. Rider

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