Marconi Power Meter
TF 1152A TF 1152A/1 TF1152A TF1152A/1


Circuit Diagram, Service Manual, Service Information,  Schematic Diagrams and Manuals

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Marconi Power Meter
TF 1152A TF 1152A/1 TF1152A TF1152A/1


The TF 1152A and TF 1152A/1 are direct reading absorption watt meters for use at any frequency up to 500 Mc/s.
Each has two measurement ranges of 10 and 25 watts full scale.
They differ only in input impedance, which is 75 ohms for TF 1152A and 50 ohms for TF 1152A/l.

These instruments measure mean power irrespective of waveform, the power contained in all harmonics up to 500 Mc/s being correctly summed with the power in the fundamental.
The meters will therefore indicate the correct increase in power when amplitude modulation is applied to a c.w. input and thus percentage depth of modulation can be calculated.

Another application is the measurement of the mean power output of pulse transmitters or modulators.
The insulation of the input circuit is rated at 500 volts and this allows the application of peak powers of up to 3.3 kW for the 75-ohm version and 5 kW for the 50-ohm version.

Their small size and light weight, and their freedom from internal batteries or external power supplies, make these instruments well suited for mobile use.

Marconi TF1152A.jpg (20679 bytes)


The Manual Contains the Following

SCHEDULE OF PARTS SUPPLIED

DATA SUMMARY


DESCRIPTION
GENERAL
DESIGN DETAILS

OPERATION
GENERAL
CONNECTIONS
MAKING A MEASUREMENT
DETERMINATION OF MODULATION DEPTH

MAINTENANCE
GENERAL
REMOVAL AND REPLACEMENT OF COMPONENTS
Removal of Case
The Thermocouple
The Load Resistor

SCHEDULE OF TESTS
Apparatus Required
Preliminary Checks
Standing Wave Ratio
Calibration Accuracy at L.F.
Calibration Accuracy at R.F.

COMPONENT LAYOUT ILLUSTRATIONS
EXTERNAL
INTERNAL
ENLARGED VIEW OF THERMOCOUPLE CIRCUIT

SPARES ORDERING SCHEDULE

CIRCUIT DIAGRAM

APPENDICES

DECIBEL CONVERSION TABLE

ILLUSTRATIONS IN TEXT
FUNCTIONAL DIAGRAM
ADMITTANCE CHARACTERISTIC
TEMPERATURE CORRECTION GRAPH
ADJUSTING SCREW POSITIONS

Manual Circuit and
Operation Instructions
Details Below
On Paper CD or Download

Click Here


Marconi Power Meter
TF 1152A TF 1152A/1 TF1152A TF1152A/1
Manuals are Available Worldwide as a Download on CD or Paper Copy.

Manual containing 20 pages including the Circuit with Component values.

Manual 20 A4 pages worldwide
Download 9.50

Printed Paper Copy or on CD are Plus Postage.

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We do all we can to provide the very best that is available for you.
But in the unlikely event that any data should not be as you expected.
A refund is always available. Kind Regards Allen and Alanna.


Manuals are Available Worldwide as Paper Copy on CD or as a Download

Thank you for your interest. Allen and Alanna G0RIT
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Revised: October 29, 2013