Arvin 657-T Schematic

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Product Information:
Model:657-T
Manufacturer:Arvin (Noblitt-Sparks)
Description:RE-307

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:

ARVIN PAQE 23-19

MODEL 657-T, Ch. RE-307

FREQUENCY RANGE

Broadcast _
TUBES
12BE6 ..................... Converter
12BA6 ........... IF Amp
50C5 Audio Output
PHYSICAL DIMENSIONS
Length ............................... v 15"
Height 3/4"
Depth .."6"
COLORS
Ivory ................................ Willow Green Clock Face
Willow Green ...................................... Ivory Clock Face
POWER OUTPUT
Undistorted 1.1 w,
Maximum .. _ v2.3 w,

ALARM DISC

AND
AUTOMATIC

VOLUME
CONTROL

SPECIFICATIONS

SPEAKER
Type
Size
Voice' Coil Impedanc

RADIO CONTROLS
Left KnobV
Right Knob

Permanent Magnet
.2 ohm

.Volume Control
..Station Selector

CLOCK FACE CONTROLS

Right ._ WMM...ww...........On-OE-Automatic
Left . ............ Alarm
Bottom Sleep Control
Cabinet Rear ,,,,,,, Time Set

CHASSIS FEATURES
Clock Controlled Power
Appliance Socket
Alarm
Built-ln Rod Antenna
Automatic Volume Control
Slide Rule Dial

POINTER

(C) John F. Rider

ALARM
SET CONTROL

Page 2:

PAGE 23-20 ARVIN

. Connect to 117 V. AC line and turn set on with volume control at full volume.

. Set generator to 455 Kc modulated 400 cycles at 30%, tune the LF. transformers for maximum output. Reduce the gen>>

. Connect generator to a radiating loop, set to 1400 Kc. Close the variable condenser and set the pointer to 540 Kc. This

. Set generator at 600 Kc. Tune receiver to 600 Kc. Adjust antenna section condenser plates for maximum output.

. Turn left hand clock knob to the "AUTO" position'.

. Turn rear knob or time set knob until radio goes on.

. Check sleep switch by setting to the 60 minute position. Rotate time set knob until radio shuts 0E. Time shown by the

ALIGNMENT PROCEDURE

Connect output meter across the speaker voice coil.

Connect the signal generator to the mixer grid, pin 7, using a .05 mfd condenser in series with the "hot" generator load.

Connect the ground side ot the generator to Boating ground.

erator output as the signal increases so that final adjustment is made with lowest input possible to give a good signal
to noise ratio at the output.

is indicated by a notch in the top of the dial plate. First notch to the left is 540, second 600 Kc, 1000 Kc, and 1400 Kc.

After setting the pointer tune to 1400 Kc trim the oscillator and antenna stages for maximum output. Repeat trimmer
adjustments until no further increase is obtained.

Check calibration and coverage after alignment coverage must be 535 Kc to 1650 Kc.

ELECTRICAL TEST FOR CLOCK

By turning right hand knob set alarm disc to an even hour number.

. There should not be more than seven minutes diHerence between alarm disc and time shown by the hands on clock face.

hands on the clock face should be one hour plus or minus seven minutes.

Clock switch must have a definite snap action on the ON-OFF-AUTO switch.

CLOCK COVE R

CONDENSER

(C) John F. Rider

Page 3:

soy >&5 224; so" 903 5a bn

Rider

(C) John F.

Page 4:

PAQE 23-22 ARVIN

MODEL est-fr, cn. 125-307

0

APPLIANCE LOCAT f:
ION o PARTS
Mm UNDER cHAsslS

HOW TO ORDER PARTS

Replacement parts should be ordered by Arvin part number, description and model number of receiver from
your Arvin Distributor. The Distributor will order direct from the factory, except in the case of tubes, which should
be obtained through regular tube distribution channels

Par' No. Dextription Part No, Description
AD25191-1 Antenna Rod and Rear Cover A252334 Knob, Clock
R25169-1 Cabinet, Willow Green A25170-1 Knob, Radio
R25169-2 Cabinet, Ivory C20158 Line Cord
C20065-680 Capacitor, 68uuf 500V Mica, C3 1F25259 Pointer (Radio)
(220292-103 Capacitor, .01 ?iOOV, C4 C20061-470 Resistor 47 ohm 1/2w 20%, R2
C20292~473 Capacitor, .047 400V, C7 C6 (222381-121 Resistor 120 ohm l/zw 10%. R6
C2029'1-473 Capacitor, .047 200V, C2 C20061-534 Resistor 530 ohm l/zw 20%, R9
A25196 Capacitor, Electrolytic 50-30/150, C5 C20070-l22 Resistor 1200 ohm lw 10%, R7
C25195 Capacitor, Variable, Cl C20061-223 Resistor 22K ohm 1/1w 20%, Rl
D25171 Clock Crystal (20061-225 Resistor 2.2 meg l?w 20%, R3 R5
C25229 Clock Face Mat Al9551 Socket, Power
D25189-1 Clock Timer C25194 Speaker S" PM
AC25192-1 Coil, Oscillator, L2 A25186 Speaker Mtg. Bracket
A20222-1D Clip, Push on (Mtg` Clock Crystal) ' AC25174-1 Speaker Baille Assy.
A19361 Clip, Hairpin (Tuning Shaft) A25265 Shielded Lead
A21792 Clip, Spring (IF Mtg.) A19135 Spring (Dial Cord Tension)
C25197 Control, Volume, R4 A19124 Snap Buttons, Speaker Baille Mtg.
A25257 Couplate, CP2 A25633 Tuning Shaft
A25264 Couplate, CPI (21797-6 Transformer, XF, T1, T2
C25185-2 Dial Plate (All Willow Green) A25263 Transformer, Audio Output, T3
A22941 Flapper Stud, Read Cover Mtg.

I CLOCK REPAIR AND PARTS

For the address of the Telecron service station nearest you, contact your Arvin Distributor or write to the Arvin Factory.

(C) John F. Rider

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