Portable device for use by a news reporter

A portable device to be carried by a reporter and for coupling to a telephone line for transmitting and receiving signals between the reporter and a broadcast station at which a receiver is connected to the telephone line, the device comprising a casing having:

• an input for a voice signal;
• voice controlled gain adjustment means coupled to said input for adjusting the voice signal to provide an output signal with reduced amplitude fluctuation;
• signal receiving means for receiving a signal from the broadcast station;
• a first transformer arrangement comprising a primary winding connected to said voice controlled gain adjustment means to receive said output signal, a secondary winding inductively coupled to the primary winding and adapted to be connected to the telephone line for transmitting to the broadcast station said output signal in a form suitable for broadcast transmission, and a first coupling winding;
• a second transformer arrangement having a primary winding adapted to be connected to the telephone line for receiving a signal from the broadcast station, secondary winding means inductively coupled to the primary winding of the second transformer arrangement and having two distinct windings connected in parallel, said distinct windings being connected to said signal receiving means, and a second coupling winding;
• and
• cross-coupling means intercoupling said first and second coupling windings to provide a cross-over inductive coupling arrangement with which said output signal to be transmitted can be substantially, but not entirely, cancelled from a signal being received from the broadcast station.

A portable device to be carried by a reporter and for coupling to a telephone line for transmitting and receiving signals between the reporter and a broadcast station at which a receiver is connected to the telephone line, the device comprising:

• an input for a voice signal;
• voice controlled gain adjustment means coupled to said input for adjusting the voice signal to provide an output signal with reduced amplitude fluctuation;
• signal receiving means for receiving a signal from the broadcast station;
• a first transformer arrangement comprising a primary winding connected to said voice controlled gain adjustment means to receive said output signal, a secondary winding inductively coupled to the primary winding and adapted to be connected to the telephone line for transmitting to the broadcast station said output signal in a form suitable for broadcast transmission, and a first coupling winding;
• a second transformer arrangement having a primary winding adapted to be connected to the telephone line for receiving a signal from the broadcast station, a secondary winding inductively coupled to the primary winding and connected to said signal receiving means and a second coupling winding;
• cross-coupling means intercoupling said first and second coupling windings for providing a degree of cancellation of said output to be transmitted from a signal being received from the broadcast station;
• and
• a variable resistance connected between said first and second coupling windings for varying the degree of cancellation to suit the users requirements.