Noblitt-Sparks Industries, Inc. 5 Schematic

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Product Information:
Model:5
Manufacturer:Noblitt-Sparks Industries, Inc. (Arvin)

Schematics Content:

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Page 1:

ARVIN PAGE 9-1

|- NOBLITT SPARKS INDUSTRIES

GAB Oscillator 6K7

FREQUENCY RANGE: 1,575-540. Kilocycles

POWER OUTPUT: 2.5 Watts

ARVIN CAR RADIO MODEL 5

ADJUSTMENT or INTERMEDIATE FREQUENCY

1. Connect the balancing oscillator to the
grid cap of the 6A8 tube through a .002
mfd. condenser. Place a 200,000 ohm
resistor between the grid cap of the 6A8
and the grid clip which normally fits on
the cap of the 6A8 tube. This will main-
tain the bias on this tube during alignment.

l 2. Adjust padder Nos. 1, 2, 3, and 4 for
maximum output.

ALIGNMENT 0F OSCILLATOR AND ANTENNA

1. Connect the balancing oscillator to the
antenna lead wire through a 50 uuf.
dummy antenna. Rotate the rotor plates
in the radio chassis tuning condenser com-
pletely out of mesh.

(C)J0hn F. Rider, Publisher

0
CHECK AT |000 L bOORC E 3
. With an Input frequency of 1,5 5 K. C.

. Reset the balancing oscillator to 1,400 K.

. Adjust padder No. 6 until a maximum

. After installation of the radio receiver in

l The sensitivity of this receiver may be deter-
mined by reading the number of microvolts in-
put required to produce 500 milliwatts output.
That output is obtained when a reading of 1.2
volts across the voice coil of the speaker is indi-
cated by the output meter.

2nd Detector, 1st Audio, Alignment

C Audio Output

adjust Padder No. 5 to resonance.

C. Rotate the tuning condenser until the
signal is tuned to resonance. Reduce the
output of the balancing oscillator until the
signal barely detlects the output meter.

out-put reading is obtained. Check the
sensitivity. See rating above.

an automobile, tune in a very weak station
between 1,300 and 1,500 K. C. and read-
just padder No. 6 for maximum output.

Form R59 Im. 1938

Page 2:

PAGE 9-2 ARVIN

Voltage ,Specs e
Layout

NOBLITT..SPARKS INDUSTRIES

Bohm chassis view 1

fumes

SENSITIVITY: (Given below for 500

*Antenna Input (1,000 K. C.)

output-1.2 Volts across voice coil)

*50 uuf. dummy antenna input

PowEn SUPPLY: 6-Volt Storage Battery

Top Chassls Vlew a
'rs-awp" nmvs, I I ' sAa was ? E
6 `7 was g E
crm" 9 exec was ?
GXSG ruse 2

6A8 Mixer Grid ( 1,000 K. C.) 140 Microvolts

: Under-_panel Type

TYPE or CONTROL

5.7 Amperes

AMPERE DRMN

MODEL s socKET voLTAGEs TQ" P'W'??_';jf_-I';"""= a
m>? new. mum s"pr saw. mm *5:1* 'o'?ggm' 3 [H _5

Feadings 'taken with input of 5.8 vows (average "A" voltage of most ca;- installations).
Rider, Publisher

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