Mitchell Mfg. Co. 1262 Schematic

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Product Information:
Model:1262
Manufacturer:Mitchell Mfg. Co.
Description:the lullaby

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:

,MITCHELL PAGE 23>>3
CONTROLS AND OPERATION
RIGHT HAND KNOB. (Volume Control and "On-Off" Switch).
Turn knob t0 the extreme right, wait for tubes to become
heated, then adjust volume as desired.
LEFT HAND KNOB. (Station Selector). Rotate knob until
desired station i received with maximum volume; then re- I
adjust volume to desired level. Never use the station selec-
tor to adjust volume a this practice results in distorted
M?d?;I`??? lzilslgiho Y tone quality and deficient b ss response.
M e No' 2 vory LAMP SWITCH. (Small knob near base of receiver). 'I'urn
This > 5? *? 5? ?Y?1?S' ?" ?" "Y di""?? ?""e" TUBES. Five tubes (including rectifier) are used Type
$9917 (DC) ranging fr?m 110 to 120 volts' numbers and locations are shown in the tube location dia-
SPECIAL INSTRUCTIONS FOR DC OPERATION. When gram o the cabinet. If tubes are removed for t st pur-
. operaiirg from a DC (direct current) power supply, it may poses, make certain each tube is replaced in its proper
be necessary to reverse the power cord plug in the wall socket. Failure to replace tubes in their proper sockets may
socket before the receiver will function. result in damage to the tube, or to the receive or both.
| ANTENNA. This receiver has a built-in "loop" aerial. LAMP. This receiver uses a show case lamp of 120 volts, Ea' 5
Its excellent design is such as to increase pick-up from 25 atts with medium screw base. Th lamp is ac essible 'D D
stations ha wide variatio s in signal strength. The for replacement after removing shade. (Never use a lamp E' F1
efficiency and selectivity of the loop provide outstandi g larger than 25 watts). ,: 5
reeenlim vithwi *he "Se Of an external aerial- SHADE REMOVAL. Place thumbs at outside top edges ef ? >>-~
'Ga-?oUND_ N0 ground connection should be used when gpg _ shade and pull down slowly until shade sna s out of upper '< ?
'ating this receiver. The receiver gets its ground connec- slot 1"
tim through the power line and any external ??1\1\e?fi?H '10 SHADE REPLACEMENT. insert suede into ueuem sie: >>-
V! 338513 HEY 031159 a Sh?1't ci-l`C"it and ?0llSe'l"eHt dam' and with fingers of both hands spaced along top edge of ?
age. shade, bow toward top slot and snap into place. F
0 John F. Rider

Page 2:

PAGE 23-4 MITCHELL _ _
MODELS 1261,
1262, The Lullaby
CARE MUST BE TAKEN NOT TO BOW SHADE MORE
THAN NECESSARY.
SERVICE DATA
Lack of sensitivity and poor tone quality may be due to any one or a combina-
tion of causes such as weak or defective tubes or speaker, open or grounded
bias resistor, bypass condenser, etc. Never attempt to realign set until all
' other possible Som-ces of trouble have been fnso ohm-nughry mvesugarea and
definitely proved not to be the cause.
NOTE: IT IS ABSOLUTELY NECESSARY THAT AN ACCURATELY CALI-
BRATED TEST OSCILLATOR WITH SOME TYPE OF OUTPUT MEASURING
DEVICE BE USED WHEN ALIGNING THE RECEIVER AND THAT THE
PROCEDURE BE CAREFULLY FOLLOWED, OTI-[ERWISE THE RECEIVER
WILL BE INSENSITIVE AND THE DIAL CALIBRATION WILL BE INCOR-
RECT. TI-LE TRIMMERS WILL BE REFERRED TO BY THEIR FUNCTION
AS INDICATED ON THE PARTS DIAGRAM.
ALIGNMENT PROCEDURE
rosrrron SIGNAL
` Rear __ Arlinsi fur
1. Onan 455 KC. Gang .I Mid. I.F. Slups riaxnnnrn
Terminal uuinut
' Front Adiusl fur
2, om 1620 Kc, ZT"'"= ?f Gang rraxinnnn
HWIWD Trimmer Outpur
lire Z" in V
1400 nc. 1400 Kc. Dummy ?"' 'Pm 22' Txxfzr'
Fm 'mm Trimmer Do ut
5 parallel Cl\?Ck
| er or R2 Sim "__ l'___j
N?~ N0> DESCRIPYIUN Nu. No. DESCRIPTION
Cl,C4.G7 N-1345 Condenser, Paper .05 MFD. 200 V. R4 N-7090 Volume Control with switch 0.5 Megohm
C2?C5 N>>8801 Condenser, Ganz Tuning R5 N-0028 Resistor 6.8 Meganm; 1/1 wait 20%
03,06 >>- Trimmers on Gang Condenser 'RS N-4016 Resistor 220,000 Ohms I/Z watt 10%
C9 Par! of N-8796 Zrrd I.F. Cui! R8 N-0024 Rbsislpr 120 Ohms 1/Z Wal( 10%
CIO.'CIZ N-409| Condenser, Pavel .005 MFD. S00 V. R9 N-4900 Resistor 1200 Ohms 1.0 Wait 10%
I 'CII N-6408 Cnrldprrser, Ctrimit 250 MIAFD. 500 V. RII N-4088 Rssisior 33 Ohms 1.0 Wai( 20%
C13 N-1314 condenser, Paper .UI IIFD. 400 V. N~8Z|7 Speaker, 3'0" P.M.
I C15) N

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