Country of Manufacture:USA
Release dates:1957 - 1960
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 1 (PB)
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 3 dB): 7½ ips: 30Hz -10kHz
Wow and Flutter:less than 0.25% at 7½ ips. 0.5% at 3¾ ips
Signal-to-Noise Ratio:better than 50dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The Bell ‘Sound’ RT-204 was a half-track mono recorder with a maximum reel size of seven inches. Three motors were used in the transport and two jacks were supplied to permit the use of an external speaker or amplifier.
A 5¼” round P.M. speaker was fitted and the unit utilized four valves (tubes). A single unit play/record/erase head was employed.
Total harmonic distortion: 1% / Rewind speed: approximately 45 seconds for 1200ft tape / Audio output power: 5 watts / Speaker(s): 5¼” round P.M. speaker / half-track mono