National Co., Inc. 6V DGSW-3 Schematic

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Product Information:
Model:6V DGSW-3
Manufacturer:National Co., Inc.

Schematic Pages

Schematics Content:

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Page 1:

PAGE_ 14-10 NATIONAL

C - Variable

HE data on the Universal Model SW-3

applies, in most part, to all models of the
SW-3 Receiver. Details applicable to older types
only are given below.

ALBW-J PARTS LIST
Ci ~-Diial variable air eapaeimr. 90
Cz-Pan of i, semi
' air capaeiwr, so mmf.
C. - .ooozhfiL mica eapaeiiar.
(2- .Olemli mica capacimr.
Cr - sanfd., 200ml: paper _capaei-

L9- mhemy choke - pan of coup

Rv _ :lmaohm whage divider m.

ACSW-3 Receiver

Dwg. No, 5 shows the circuit diagram and parts
list. This model uses two type 58 tubes as R.F.
ampliiier and detector and one type 27 ss audio.

NATIONAL CO., INC.

AEarlier Models oi SW-3

General

AUDIO AMPLIFIER
Far bud speaker fecepziim, :he audio
amplifier shawn ar the fight is recommended
Resistor "R" will 41er on the panicular
tubes employed, as fa lows: 245%, 750 uhm;

an!! resistor -

DWG. NO. 5 - CIRCUIT DIAGRAM OF THE ACSW-3

Hester circuits require 3.75 amps., 2.5 volts;

"B" circuits, 135-180 volts D.C. "60770" Series

of coils are used.

6V DCSW-3 PARTS LIST
The eimaii diagram shew; :y 36
apemimi. By sim ly V inning :ype
35 for type36 a rype 27 lor type 37,
:he receiver may be convened m 2.5-
volr AC opermion. wi'xiiouz circuit of

coil changes, Circuit columns are
i'demical with those n lying m
DWG. No. 5 wish :he fo mg ex-

R9 - 20.000>>ohm. wan regismr.

swa seamen
a vc; Mimi

Dwg. N0, 7,shows the circuit diagram and
parts list. Two-type 32 tubes are used as RJ".

DWG. NO. 6- CIRCUIT DIAGRAM OF THE 6V DCSW-3

6V DCSW-S Receiver

Dwg. Ne. 6 Shows :he circuit diagram and lists
values of parts. Tubes used are two type 36 as
KF. amplifier and detector and onetype 37 as
audio. Heater circuits require .9 amps., 6.3 volts;
"B"A circuits, 67 and 135 volts DC.

lf desired, type 35 tubes may be substituted for
type 36 and type 27 for 37, making the receiver
suitable for 2.5~vclt heater operation. Heater
current drain when so operated is 5.25 amps.;
"B" potential, 67 and 135 Volts DC. In either
case. "10-20" series of coils are used.

amplifier and detector; one type 30 as audio.
Filament circuits require .16 amps., 2 volts DC;
"B" circuits, 67 and 135 volts; and bias circuits,
3 volts. "10-12" series coils are used.

9.1m r. Rider

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