Company History

In 1948 Radio Industry Zagreb (RIZ) was established as a State controlled company for production of radio broadcasting equipment, with intention to serve needs of Radio Zagreb station.

Since 1949
STARTING THE PRODUCTION  
In 1949 RIZ started the production of radio broadcasting transmitters as the contract for delivery of a 15 kW medium-wave radio broadcasting transmitter for Zagreb Radio was concluded.

After successfully delivering the very first one low power transmitter, RIZ continued with the production of low power transmitters for the Yugoslav market.


Since 1960
STARTING THE PRODUCTION OF HIGH POWER TRANSMITTERS
The Company has concentrated its research on high power transmitters since the 1960's, starting with delivery of one 100 kW MW transmitter for Radio Ljubljana and 2x200 kW MW transmitters for Radio Belgrade.

The great experience gained on these projects gave the company staff courage and excellent references for international marketing.


Since 1965
ENTERING THE INTERNATIONAL MARKET
In 1968 RIZ supplied 2x500 kW transmitters to All India Radio and  2x50 kW MW and 2x300 kW MW transmitters to West German Radio Broadcasting Network with Siemens's intercession.

With these projects completed, our long-term ambition to enter the international market with a high power transmitters programme became a reality.
Within a few years RIZ delivered transmitters with accessory equipment to 25 foreign countries.

Since 1970
TURN KEY SYSTEMS
In the 1970's the international market asked for turn-key projects. In 1978 RIZ made a contract for 2x300kW MW transmitters on a turn-key basis.
That was the largest individual export deal in Croatia for that year.

Since 1981
MOBILE SYSTEMS
After extensive research RIZ was proud to unveil a new generation of mobile high power transmitting stations, including  transmitters, antennas, generators and associated equipment. The mobile station has all the necessary broadcasting equipment needed for transmission.

All the equipment is installed in ISO standard containers and treated to enable safe and reliable operation with or without staff in it.
The highest produced and installed power was a 300kW MW solid state mobile, totaly independent radio broadcasting transmitting system.

Since 1991
SOLID STATE TRANSMITTERS PROGRAMME
RIZ's research and development team has created a new generation of solid state, low cost, high efficient and  high reliable totaly solid state high power MW transmitters.

Since 2000
DRM
In the year 2000 RIZ joined the DRM (Digital Radio Mondial) organization as a Class A member.

Since then RIZ is offering the knowledge and equipment which enables easy modification of any existing analogue transmitter to enter into a digital high quality, low costs world .


Since 2003
DRM  in SW TRANSMITTERS
Our own design and new solutions have been applied in our high power, high efficient, DRM SW transmitters up to 500 kW of power with tubes in RF output stage only.


Since 2008
FIDELITY  LINE TRANSMITTERS
The FIDELITY Line of transmitters is a new generation of totaly solid state MW transmitters with extremely high efficiency, designed and tested in accordance with all relevant standards.


At present time RIZ is working continuously on improving equipment quality and customer support.