Zenith Portable receivers
In 1924, the "Zenith Radio Corp." emerged from the „Chicago Radio Laboratory“, producing TRF receivers until 1929 and then the first superhets.
After the turmoil of the economic depression, the company quickly could recover. After the polar explorer McMillen had already carried a Zenith portable radio on his expeditions in 1925, he was given a prototype of a multi-band receiver in 1941, which Zenith had been developing since 1939 and which was distinguished by above-average reception performance.
The "Trans Oceanic", like the numerous successors, was equipped not only with the medium-wave range but also with five spread short-wave broadcast bands from 49 - 16 m, the unit had a telecopic antenna, a built-in medium-wave loop antenna and the „Wave Magnet“, a short-wave loop antenna that could be operated remotely, and the the „Radio Organ“, four tone switches to influence the sound.
The seven tuned circuits superhet 7G605 with pretuned RF-amplifier is equipped with battery tubes and could also be powered by 117 V mains voltage.
During the war years, the image of a bomber adorned the loudspeaker fabric, the receiver was appreciated by its owners in all theatres of war, it reliably conveyed news from home. In 1946, it was replaced by the 8G005, the commercially very successful G500, which was distributed from 1949, was based on miniature tubes.
One of the most widespread radios was the H500, sold from 1951 onwards, still equipped with a round tuning dial. Instead of the 49 m band, two shortwave ranges were now available, 2-4 and 4-8 MHz, which also covered the tropical bands.
The H600, which followed in 1953, was equipped with a linear dial and was the last tube-equipped world receiver from Zenith.
With the Trans Oceanic Royal 1000, the era of transistor world receivers began in 1957, the horizontal turret tuner gave a completely different look to the radio. After the Royal 3000, which was released in 1963 and was the first set featuring a VHF range, the Royal 7000 completed the series of solid state Trans Oceanic receivers in 1969, it had the capability CW and SSB reception with a BFO.
With the R 7000, which was introduced in 1978 and produced until 1981, and which followed a similar concept as the Sony Earth Orbiter with horizontal turret tuner and fine tuning, Zenith missed to keep up with it's competitors: companies from Germany and especially from Japan were able to deliver world receivers with digital frequency display and then even PLL synthesizers at a comparable price - the era of the Trans Oceanic and with it the American world receivers came to an end.
Zenith Portable Receivers
|7G605||1941/2||Single Conversion||MW, 5 x SW (49, 31, 25, 19, 16 m)||Analogue display|
|8G005||1946||Single Conversion||MW, 5 x SW (49, 31, 25, 19, 16 m)||Analogue display|
|G500||1949||Single Conversion||MW, 5 x SW (49, 31, 25, 19, 16 m)||Analogue display|
|H500||1951||Single Conversion||MW, 6 x SW (2-4 / 4-8 MHz; 31, 25, 19, 16 m)||Analogue display|
|L600||1953||Single Conversion||MW, 6 x SW (2-4 / 4-8 MHz; 31, 25, 19, 16 m)||Analogue display|
|Royal 1000||1957||Single Conversion||MW, 6 x SW (2-4 / 4-9 MHz; 31, 25, 19, 16 m)||Analogue display, turret tuner|
|Royal 3000||1963||Single Conversion||UKW, MW, 6 x SW (2-4 / 4-9 MHz; 31, 25, 19, 16 m)||Analogue display, drum tuner|
|Royal 7000||1969||Single Conversion||VHF, MW, 7 x SW (1,6-3,5 / 3,5-9 MHz; 31, 25, 19, 16, 13 m)||Analogue display, turret tuner, BFO|
|R 7000||1979/81||Single Conversion||2 x VHF, LW, MW, 7 x SW (1.8 - 30 MHz)||Analogue display, drum tuner, BFO|