Country of Manufacture:United Kingdom
Speeds: 7 1/2
Max Reel Size("): 3"
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:30-12,000 ±1dB
Wow and Flutter:0.2%
Sound quality rating:5 / 10
Casian announced their second battery recorder in November 1960. It was called the Trav-Ler Professional and it had an AC option
It was a single speed (7½ ips) machine weighing in at 8lbs (3.64 kg) and cost almost three times the price of the domestic Trav-Ler.
Taking 3″ reels, the Trav-Ler Professional was fully transistorized with a VU recording level meter and a single 9-volt motor. Batteries provided about 50 hours of usage and 22 minutes of recording time was available using a three-inch reel of double play tape.
The claimed frequency response was 30-12,000 c/s ±1dB with a signal-to-noise ratio better than 55dB unweighted. Wow and flutter was quoted as better than 0.2% RMS.
The main function switches gave control as follows: rewind, replay, on/off, record and monitor replay, fast forward, record level control, meter/monitor switch and pre-set replay level control. The meter could be switched to indicate record level/line replay level and battery status.
The machine came in two units: the recorder itself which incorporated a replay monitor amplifier and a second unit which housed a one-watt amplifier and a 7 x 4″ elliptical speaker.