Equipment information:

Stancor Standard Transformer Corporation ST-203-A Transmitter
Manufacturer:
Stancor Standard Transformer Corporation
Model: ST-203-A
Date: 1948
Category: Radio, Communication
Group: Transmitter
Description: Radio Transmitter
Information:
                                    Stancor Model ST-203-A Radio Transmitter provides telephonic
emission in the frequency range between 27 and 32
megacycles. Although primarily intended for mobile
operation, it is also useful for fixed station service.

Electrically, the ST-203-A is designed to be powered from a
dynamotor or vibrator supply for mobile work, or an AC
supply for transmission from a fixed location. Either type
of operation may be realized bv plugging the output of the
appropriate power supply into the ST-203-A receptacle.
Mechanically, the transmitter is firmly attached to a base
mounting plate by means of spring loaded, catch fasteners
which are easily released for quick removal of the unit to
another location for AC or DC operation.

Periods of transmission and standby are controlled by a
press-to-talk switch mounted on the microphone. Operating
control of the transmitter is available at a remote position
or at the unit itself.

Oscillator, amplifier and antenna tuning knobs, as well as
crystal and meter switches, are conveniently located at the
front of the unit. Here, too, are the microphone and meter
jacks and the coaxial connectors to the antenna system and
receiving equipment.

in consideration of safety to the operator, external
exposure of high voltage is prevented. Control circuits are
arranged so iliat, should the connector plug from the power
supply system be removed from the ST-203-A

chassis while it is in operation, the high voltage will
automatically turn off. Even the metering circuit is
grounded to the chassis.

Although it is expect oil that a one-quarter wavelength,
vertical whip antenna will most commonly be used in mobile
installation, any suitable type of antenna system fed by
small size coaxial cable may be applied to the ST-203-A.

These manuals are available for the above equipment:

Stancor Standard Transformer Corporation -- ST-203-A -- Service and User Manual
File name: Stancor-8049-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 19
Size: 12.31 Mbytes (12908432 Bytes)
Language: english
Revision: First Printing
Manual-ID/Number:
Date: 01 May 1948
Quality: Scanned document, all readable.
Upload date:
MD5: 4b3e98b198eb7c4513e3272cd44f1c07
ed2kID: 442671a29d6ec553e4a3f0fc81a501b5
Downloads: 2 since 18 September 2016
Information:
Specifications................................................................................................1

General............................................................................................................2

Accessories.............................................................3

Circuit
Explanation..................................................................................4

Assembly (Construction
Steps)....................................................................6

Installation..................................................................................................17

Mobile (DC)
Operation..........................................................................17

Fixed Station (AC)
Operation..............................................................20

Adjustment and
Operation......................................................................21

Controls and
Connectors........................................................................21

Tuning
Procedure....................................................................................22

Legend to ST-203-A Schematic:
Diagram..............................................26
Stancor-8049-Manual-Page-1-Picture
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