May 1930 RadioCraft
[Table
of Contents]
Wax nostalgic about and learn from the history of early electronics.
See articles from RadioCraft,
published 1929  1953. All copyrights are hereby acknowledged.

Interestingly, a couple models of this radio featured
an untuned front end at the antenna interface, possibly because the adjustment range of the provided
variable capacitor would not handle an extreme antenna impedance. With as basic as all the RF amplifier
stages are, it seems maybe adding a second adjustable capacitor in parallel to facilitate a wider adjustment
range would not have been too big of a cost burden compared to the advantage of tuning the input in
the presence of all the EMI spewing from crappy electromechanical equipment and minimally filtered
transmitters (it was the era of AM).
Atwater Kent Models 30, 33, 35, 48 and 49
These receivers are sixtube sets of the singleĀdial, batteryoperated type. They are often referred
to by their factory catalog numbers, to wit: Model 30, No. 8000; Model 35, No. 8100; Model 48, No. 9840;
Model 33, No. 8930, Model 49, No. 9860. The models 33 and 49 have a tuned input (four tuned circuits);
the models 30, 35 and 48 have an untuned input (three tuned circuits). Models 48 and Models 49 are code
numbers showing that a goldfinished panel is used. Models 33 and 49 are so wired that R5 limits the
current to V5 and V6 only while V4 is controlled by the additional variable resistor Rx. R in the first
stage of these two circuits has the same value as equivalent resistors R1 and R2. C is the regular tuning
condenser, in shunt to which is the circuitbalancing variable condenser Ca.
The purpose of the untuned antenna input of the 30, 35 and 48, shown in the larger diagram, is to
eliminate the detuning effects of aerials of different constants. If it becomes necessary to change
a variablecondenser bank, make certain that the pulleys turn easily on the shafts; if they do not because
of a damaged condenser shaft, replace the entire condenser group.
Each belt must be arranged with the eyelets, which clamp the two ends together, at the bottom of
the belt loop. Each belt has two small holes; one to fit over a pin on the dialcondenser pulley and
the other to fit over the pin on the pulley which is controlled by that belt.
Posted September 21, 2016
Radio Service Data Sheets
These schematics, tuning instructions, and other data are reproduced from my collection
of vintage radio and electronics magazines. As back in the era, similar schematic and service
info was available for purchase from sources such as
SAMS Photofacts, but these printings
were a nocost bonus for readers. There are 220 Radio Service Data Sheets as of
February 2, 2018.

 Remler Model No.
36 DualWave AutoRadio
 StrombergCarlson
No. 82 AllWave Receiver
 Majestic
A.V.C. Model 290 Chassis
 FADA 9 Tube Model 190
"Metal" AllWave
 RCA Victor Models
9T and K2 9Tube, 5 to 566Meter
 Motorola
"Golden Voice" Model
 RCA
Victor Model H6
 Simplex
Model TA
 Automatic
"Magic Eye" Model A1
 Silvertone Models
4488 and 4588 (Chassis No.101412) and 4488A and 4588A (Chassis No. 101412A)
 RCA Victor Model
M109 "De Luxe" 7Tube AutoRadio Receiver
 Crosley Model 6625
6Tube 3Band Receiver
 International Model
77 Series 7Tube DualBand Receiver
 Belmont Model 6D121
 General
Electric Models 60, 62
 Admiral Model 7C64
 Radiola
"28" Super and "104" Power Speaker
 Sonora Model TW49
 StrombergCarlson
Models 1020, 1120, Series 10
 Air King Model 4604D
 Sparton Models 526, 526X,
526PS
 Truetone Model D2624
 Admiral Models
6EI, 6EIN
 Detrola Models 571A,
571B
 General Electric
Model 250
 Howard Model 920
 Colonial Model 652
5Tube BroadcastShortWave
 FairbanksMorse
9Tube AllWave Model 91
 International
Model 500 5Tube DualRange Battery
 Emerson Model 678 "AutoDynamic"
5 Tube
 StrombergCarlson
Nos. 230 and 231 Series
 Atwater Kent
Model 649 AllWave

Howard Model G26, and "Airplane 4" Model AA25

Montgomery Ward "Airline" Series 7GM 7Tube HighFidelity Receiver
 RCA Victor Model
T52 5Tube, 2Band A.C. Superheterodyne Receiver
 Majestic
"Models 50," "51" and "52"
 BremerTully
Model 770 and 771
 General
Electric Model M49 4Tube RadioPhonograph DualWave Superheterodyne
 RCAVictor Radiola
"Superette" Model R7 Superheterodyne
 Crosley Model AC7 and AC7C
 Westinghouse
"Columnaire" Models WR8 and WR8R (Remote Control)
 Characteristics
of Metal Tubes  and Other "Octal" (8Prong) Base Types
 Kolster K20, K22, K25,
K27 and K37 SixTube Receivers
 StrombergCarlson
Nos. 62 and 63, 8Tube HighFidelity Chassis
 RCA Model 103, 4Tube
A.C. Compact DualWave
 FADA "Special" Model
265A and FADA "7" Model 475A
 General Electric
Model C62 6Tube Battery
 Emerson 5A Automotive
 Zenith 666 Automotive
 Motorola 100 Automotive
 Crosley
Roamio 4A1 Automotive
 AmericanBosch
524A Automotive
 Crosley Model 1316
(in Model 167 Console)
 RCA Victor "HighFidelity
Electrola," Model R99
 AMRAD Model 81
("Bel Canto" Series) Receiver

Fada 103 Fadalette, StewartWarner Series 108, DeWald 54 Dynette Sets
 RCA Victor R27
and Philco 53 UltraMidget A.C.D.C. Radio Receivers

Majestic Models Fairfax and Sheffield 8Tube
 StrombergCarlson
No. 29, 9Tube Superhet
 International
Kadette Model 400 4Tube BatteryOperated Superhet
 RCA Victor Model 5M
5Tube Auto Superhet

Majestic
Model 11 ShortWave Converter
 SilverMarshall
Model 727DC BatteryOperated Superheterodyne
 RCA Victor Model
VHR307 Home Recording  PhonoRadio Combination

Delco
32Volt Radio Receiver Chassis Models RA3, RB3 and RC3
 Majestic Chassis
Models 380 A.C. T.R.F., and 400 A.C.D.C. Superheterodyne
 General Motors S1A,
S1B
 Admiral Model 7C63,
Chassis 7C1
 Westinghouse
Model H133
 Arvin Models
150TC, 151TC
 Kadette Model 90 Duplex
 RCAVictor
"Magic Brain" Model 281
 Grunow 11A Chassis
11Tube AllWave Superheterodyne

Sears, Roebuck & Co., Silvertone "Rocket" Models 6110 and 6111

General Electric Model GD52

Zenith Models 6D302, 6D311, 6D326, 6D336, 6D360

Allied Radio, Knight Model E10913
 Arvin Model 140P
 Emerson Models 501,
502, 504
 Crosley Model 56TDW
 Hoffman Model A500
 StewartWarner
Model 9003B
 Zenith Models
6D014, 6D029
 Coronet Model C2
 Sparton Models
746, 746PA, 846, 846PA
 StewartWarner
Models 9001C, D, E, F
 Zenith Models
5D0115D027
 Bendix Models 636A,
C, D
 ECA Model 108
 International
Model 66 and 666, 6Tube Superhet
 FordPhilco
Radio, Model FT9, 6Tube AutoRadio Receiver
 Howard Explorer Model
W Deluxe 19 Tube AllWave Superhet
 RCA Victor Portable
Table Electrola Model R95
 Atwater Kent Model
305Z 5Tube 32 V. D.C. Superhet
 Kadette Jewel Model
40 Chassis 3Tube UltraMidget Receivers
 General Electric
Model N60 6Tube Auto Superheterodyne
 Sparton
Model 40 6Tube T.R.F. Automotive Receiver
 Clarion
"Replacement" Chassis, Model AC160 A.V.C. Superheterodyne
 Emerson Models 20A and
25A
 General Electric
K40A
 Pilot Model B2
 RCAVictor Radiola
Model M30 Automotive Radio
 Motovox Models
10A AllElectric and 10E BatteryOperated "MotoTetradynes"
 Kennedy
Superheterodyne ShortWave Converter
 RCA Victor Model
R78 B1Acoustic 12Tube
 Philco Model
15 Series, 11Tube Superheterodyne Chassis
 Zenith Challenger
Model 740

 Sparton Selectronne Receivers Models 1068 and 1068X
 Fada Model 155 Super
Fadalette A.C.D.C. Set
 Clarion
De Luxe Models AC280 and 25280
 Crosley
Model A157 (River Roamio) Auto Radio
 Philco Model '37116
Codes 121 (Shadometer) and 122 (Dial Tuning)
 Arvin
Model 28
 Philco
Model 818
 Fada
Model 266 Motoset
 Bosch
Models 736, 737, 738
 RCAVictor Model
15U, RadioPhonograph
 Sparton Models 566
("Bluebird" Mirror), A.C.D.C. 5Tube 2Band Midget Superhet
 Atwater Kent Model
776 6Tube Auto Radio
 StrombergCarlson
No. 61 4Band 7Tube A.C.D.C. Receiver
 Arvin Model 182TFM
 Crosley Model 58TK
 Westinghouse
Model H165
 General
Electric Models G105 and G106
 Silvertone "F," "FF,"
"G," "H," and "J"

StewartWarner
Model 035A1 to 035A9 (Chassis 035A) Senior Varsity Radio
 Radiola Models 616,
617
 Westinghouse
Models H104, H105, H107, H108
 Farnsworth Models
EC260, EK262, EK263, EK264, EK265
 United Models
980744, 980745
 StewartWarner
(R127 Chassis) Models 1271 to 1279 AllWave
 ERLA Model 4500 DualWave
T.R.F. 4Tube A.C. Receiver
 Clarion No. TC31 5Tube
A.C.D.C. Superhet.
 Detrola Model 105C 5Tube
DualBand A.C.D.C.
 Zenith 6Tube
AllWave Chassis No. 5634
 RCA Victor Model
261, 555 to 107 Meter
 Philco Model 38116;
Code 125

StewartWarner "Ferrodyne" Chassis Model R136
 AmericanBosch
Model 43OT 5Tube 3Band Superheterodyne
 RCA Victor Model
C94 9Tube 3Band Superheterodyne
 Kennedy "Model 826B"
Combination Receiver
 Steinite 50A and
102A
 Pilot Model 63 AllWave
6Tube Superheterodyne
 StrombergCarlson
No. 69 4Tube AllWave Superhet. Selector (Converter)
 RCA Victor Model
102 4Tube A.C.D.C. T.R.F. Receiver
 Bosch Models 60 and 61
 Atwater
Kent Models 30, 33, 35, 48 and 49
 Crosley Model 120 Senior
Superheterodyne (Pliodynatron) Chassis
 Columbia
ScreenGrid 8 Receiver
 General
Electric Models A82 and A87, 8MetalTube AllWave A.C. Superhet.
 Colonial 31 and 32
D.C.
 Zenith 5Tube TripleWave
Chassis nos. 5508 and 5509
 Remler Model 46 ("Scottie")
 General Electric
FA60 and FA61
 StewartWarner
Series 900
 Howard Model
B5 (715), Series 1 and 2 (Sheaffer RadioClockPen Desk Set)

FordPhilco CarRadio Models F1440 and F1442

Brunswick
Model 31 Combination Radio and Panatrope
 Emerson Models 38, 42
and 49, 6Tube DualWave (Chassis U6)

General Motors Chevrolet No. 601574 Automotive
 RCA Victor
M104 (and M108) Automotive
 ArvinFord 17A
Automotive
 Westinghouse
Model WR 207 & WR 208 5Tube DualBand Superheterodyne
 Radiolas "Super VIII"
(AR810, "SemiPortable" (AR812), 24 and 26
 Howard Model 45 A.
V. C.
 Majestic Model 25

Galvin Motorola Model 61
 Arvin
Model 6
 Admiral Models 7T06,
7T12
 Garod Model 5A1
 Hoffman Model A301

Knight Model E10716 Battery Portable
 Arvin Models 555, 555A, 552N,
552AN
 Grantline Models 605,
606
 Truetone Model D2616
 Belmont Model 5D128
 Arvin Models 444, 444A

International Kadette Model 1019

StewartWarner Models 97561 to 97569
 General Electric
Model 280
 Zenith Models 5R080, 5R086
 Truetone Models D1747,
D1748

Crosley Roamio Automotive T.R.F. Models 90, 91, 92

Crosley Roamio Automotive Superheterodyne Models 95, 96
 WellsGardner
Series 062
 Emerson
Model AZ196
 Belmont Model 5P19
 Crosley Model 56FC
 Emerson
Models 507, 509, 518, 522, 535
 Garod Model 6AU1
 General Electric
Models 219, 202, 221

Crosley "Chairside" Model 567

Belmont Model 408 Battery "Farm"
 Wards Model 74BR1055A
 Farnsworth Models EK081,
EK082, EK083, EK681
 Philco Model 200X
Radio

Admiral "Aeroscope" Models 1615L, 1625L and 1635L
 Philco Model 59,
4Tube A.C. Midget Superheterodyne
 Zenith Farm Model
6V 27, 6Tube Superhet
 Ward 10Tube AllWave
HighFidelity Superhet, Series ODM
 PhilcoPackard
Deluxe
 Canadian
Westinghouse Model 175
 Crosley Model 1155
 Philco Models 39 and 39A
 Arvin
Model 35 8Tube CarRadio
 Hetro AirAce Series
M
 Westinghouse Models H161,
H168, H168A
 Garod Model 5A4
 Arvin Models 152T, 153T
 Belmont Model 5240
 Mantola Models 92505, 92506
 General Electric Models
102, 102W, 107, 107W, 114, 114W, 115, 115W
 Crosley Model 555 (A.F.M.)
 Crosley Model 515 (Fiver)
 Crosley Model 425 (Travo)
 FirestoneStewartWarner
Model R1332
 FairbanksMorse
Model 81 "Farm" Set
 Clarion Model 423, 470,
471, 472, 480
 International
Radio Corp. Model 90
 Belmont Model 578 Series
A

