Country of Manufacture:Austria
Speeds: 1 7/8, 3 3/4
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Dual Track
Frequency Response:( 3 dB): 3¾ : 40 - 15kHz. 1ips: 40 - 8kHz
Wow and Flutter:<0.3%
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The 604 was a compact twin-track mono recorder with two speeds (3¾ & 1 7/8 ips) and a seven-inch spool capacity. Attractively styled in two-tone gray, the 604 featured a four-tube circuit (including an EM84 magic eye) with a 2.5 watt output. Wow and flutter was less than 0.3%.
Also available with built-in AM tuner, the 504 ‘Radiocord’. Price when new was 2,995 Austrian schillings.
Inputs: microphone 1mV, P / U 100mV / Output power: 2.5 watts / Valve complement: ECC83, EC92, ECL82, EM87 / Bias frequency: 55kHz / Rewind speed: 3 minutes for 7″ 1200ft / Dimensions: 15½ x 11¼ x 6¼ inches (390 x 285 x 160 mm) / Weight: 20.3 lb (9.2 kg) / two-track mono