Marconi Ekco
TF144G TF144G/1 TF144G/2
TF144G/3 TF144G/4 TF144G/5 TF144G/6
RF Signal Generator
TF 144G TF 144G/1 TF 144G/2
TF 144G/3 TF 144G/4 TF 144G/5 TF 144G/6 Download

May Also help with : -
Military Model
Signal Generator
No 1 Mk II WY0268
Mark 2 MkII MK11 MK 11


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

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The Marconi Ekco Standard Signal Generator

TF144G TF144G/1 TF144G/2 TF144G/3
TF144G/4 TF144G/5 TF144G/6

TF 144G TF 144G/1 TF 144G/2 TF 144G/3
TF 144G/4 TF 144G/5 TF 144G/6


From the title there would seem to have been a joint venture between the two companies at this point in time.

General Description
The standard instrument is designed for alternative a.c. mains or battery operation.

It covers a radio frequency range of 85 kc/s to 25 Mc/s and gives a continuously variable output of one microvolt to one volt.
This is controlled by a calibrated attenuator and may as required be modulated either externally, or by the internal 400 c/s oscillator.

The r.f. current entering the attenuator is monitored by a thermocouple meter determining level and modulation depth fundamentally.

Output impedance is 10 ohm normal or 52.5 ohm high level.

Schedule of Parts Supplied
Instrument Type TF 144G (Series) complete with valves etc as follows : -

Three: Type MM or 41FP Triodes
One : Type MU12/14 Rectifier
One: 6.5V 0.3A MES Lamp
One Mains Lead Type TM 2560Q with 8 pole socket
One Battery Lead Type TM 2253/1 with switch and 8-pole socket
One A-W Dummy Aerial Type TM 1758 with screening lead and socket
one Spare Concentric Screened Socket Type TM 1726.
One Spare Thermocouple Type TM 3307 mounted on attenuator cover plate
One Instruction Book No. EB 114G (Series)

Note : -
The parts supplied with a TF144G/6 differ slightly from those listed above.

The Dummy Aerial is a Type TM 1758A also Mains Lead Type TM 2560Q is not supplied; instead a -special 8-way free socket - type TM 3595A, and a 3-way free socket, Bulgin Type P 73, are provided.

The 8-way socket is for attachment to the front panel input plug when the Battery Lead is not in use.

The 3-way socket is for connection to the mains inlet a which on the TF 144G/6 is at the rear of the instrument.

Marconi_TF114G.jpg (26102 bytes)

Information with Circuit and
Rear image Details Below
On Paper CD or Download

Click Here


The Information available contains the Following : -

DESCRIPTION
General - Radio Frequency Circuits - Modulation System -  Power Supply - Special Instruments

OPERATION
Initial Adjustments
Output Connections
Operation Un-modulated
Incremental Tuning
Internal Modulation
External Modulation

SCHEDULE OF PARTS SUPPLIED

MAINTENANCE
Valves and Voltages
Contacts
Thermocouple Replacement
Exchange of Coil Units

THE CIRCUIT DIAGRAM

COMPONENTS AND VALUES

VIEW FROM REAR WITH COVER REMOVED
 

Information with Circuit and
Rear image Details Below
On Paper CD or Download

Click Here


Marconi EKCO RF Signal Generator
Manuals are Available Worldwide as a Download on CD or Paper Copy.


TF144G TF144G/1 TF144G/2 TF144G/3 TF144G/4 TF144G/5 TF144G/6
TF 144G TF 144G/1 TF 144G/2 TF 144G/3 TF 144G/4 TF 144G/5 TF 144G/6

May Also help with : -
Military Model
Signal Generator
No 1 Mk II WY0268
Mark 2 MkII MK11 MK 11


The information I have is not a service manual but contains all the data in the above column, it will assist in repairing and servicing.

Information with Circuit and View from rear.

The circuit Diagram and component list are a photo copy of the original blue prints but well readable, the rest of the text is normal.
 
A total of 15 A4 pages worldwide

Printed Paper Copy or on CD are Plus Postage.

( For all Payment Options plus UK and Overseas 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
Should you wish to purchase

 
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Revised: January 20, 2016