In this article about great radio amateurs of history we have to name two Argentines apacionados by radio amateur but more than anything apacionados by the mode of transmission amplitude modulated AM, mode in which the quality of audio that can be achieved is the pleasure of The demanding listening, impossible thing to achieve in the SSB mode by its extreme bandwidth. Woe to you standing gentlemen! We are talking nothing more and nothing less than the most powerful and prestigious amateur radio stations in the radio amateur world of the last times! They are the well-known and listened LU1DCE Jorge and Lu8EHA Norberto. LU1DCE was the first radio amateur station to overcome the audio quality of the large broadcasting and bring that great sound to the world of radio amateur, not conformed to that after much work developed the very famous and well known audio curve JRH which was Copied and adapted by the big chains of manufacturers of audio processors for broadcasting in the world, he was also the creator of a new transmitter with great characteristics for the time, in the year 1964 Jorge developed a particular AM radio equipment with 4 valves 6dq6 in radiofrequency modulated by other 4 6dq6 in audio, equipment that was copied throughout the years by all Argentina and the world of amateur radio amateurs. Around the 70s the great LU1DCE decided to challenge to the great manufacturers of transmitters Of AM developing a prototype transmitter for a broadcastin station in Argentina, this transmitter had the following characteristics Basically it is an RF class C amplifier with 24 valves 6DQ6B connected in parallel, modulated by a push pull class B using the same valves.
The transmitter originally would be as auxiliary equipment according to the current regulations, to be put into operation in the event of failure of the main, which was the very common configuration of 2 valves 4-400 x 2 4-400. But soon it happened to be the "main" TX of the transmitter by the following and interesting reasons:
1) LESS electric power consumption with a 55% performance against the classic 30%
2) Valve replacement cost: LESS THAN HALF
2) Valve life: DOUBLE
3) IMPACTING sound with your FLAT response from 20Hz to 35KHz