Elektro-Mess-Technik
Electricians measuring technique (EMT ) is a manufacturer of record players and professional audio equipment in Mahlberg at Lahr / Black Forest. The company was founded in 1940 by Wilhelm Franz as electrical metrology Wilhelm Franz KG and trades today as EMT Studio GmbH.
History
In the 2nd World War, the company produced control and measurement instruments for news and broadcast engineering ago. After the 2nd World War, the company shifted its production to Lahr / Black Forest. After the death of William Francis, 1971, the family business was continued by his wife Hildegart Franz and a managing director. In 1989, the EMT was sold to the Belgian Barco Group. 2003 sold the Barco EMT, including the trademark laws of Walter Derrer.
Historical products
EMT 927
After the Second World War, Franz designed in cooperation with the Radio Technical Institute (RTI ), led by Dr. Ing Walter Kuhl, the EMT 927 studio turntable, which was introduced in 1950/1951. The turntable with a diameter of 44 cm was needed in order to play the then customary 16 " acetate discs can. He was a strong oversized motor using friction wheel in the speeds 78, 45 and 33 1/3 rpm driven., the Danish company Ortofon supplied initially the tonearm ( ' RF -297 ') and the first magnetic pickups to. EMT later built for the 927 ( stereo version only ) 12 " arm 997 ( banana). Moreover, it was in the far edge the turntable installed a Stroboskopanzeige to adjust the speed correctly, his quick start enabled the acceleration time of just 0.5 seconds at 33 1/3 revolutions per minute.
The versions of the EMT 927:
EMT 928
The EMT 928 was a small studio turntable with belt drive for use in radio and music editors. It was based on a heavily modified Thorens TD 125 and was equipped with the tonearm EMT 929
EMT 930
By the 12 " inch record of 44 cm platter was the 927 no longer an absolute requirement for professional use. Consequently, EMT decided next to the EMT 927 EMT to develop 930 studio turntable. 1956 was the launch. With its rather compact size was 930 economical than its predecessor built the EMT. the device was built in large numbers and sold internationally.
EMT 950
After extensive research in the direction of direct drive from the early 1970s, the EMT 950 was brought to market until 1976. The peculiarity of the construction of the EMT 950 is the direct coupling of a 200 -gram turntable on a strong drive motor. This combination allows start and stop of the turntable without an additional brake is necessary to do so. The still built and by a ring magnet controlled brake is only used to fix when reaching the speed 0 the platter in position. A manual cueing is still possible. A complex opto- electronic speed control ensures this model for extremely good synchronization values . The values for Wow and Flutter were below the values of the DIN test record. The target speed of 33 1/3 rev / min is reached within 150 milliseconds.
EMT 948
In order to be able to meet requirements for a smaller model, a new model was introduced in 1979, which built on the principles of the EMT 950: EMT 948 broadcast turntable. He was also directly driven, possessed the same technique, but in a smaller, more compact design. For the user, a shelf for the record sleeve was attached to the unfolded cover while the plates were played. The entire electronic system was distributed on cards, so that any necessary changes or repairs could be carried out quickly and easily. The 948 had the same buttons as the 950, the same speeds and the possibility of driving in reverse to determine the exact beginning of a track or exactly to go.
EMT 938
In March 1982, an even simpler turntable was developed: The EMT 938 broadcast turntable. He also included a direct drive drive and simplified electronics. He was more compact and cheaper than the models previously produced. From the EMT 938 was from Thorens, as an almost identical version of the ' TD 524 ' - a DJ turntable - available and could be provided with a Thorens tonearm or the proven EMT tonearm '929 ' either. The EMT 938 was primarily used for smaller or private broadcasters and was the last in a series of professional turntables.