Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:USA
Release dates:1966 - 1969
Speeds: 1 7/8, 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 3 dB): 7½ ips: 40Hz - 18kHz
Wow and Flutter:less than 0.2 % at at 7½ ips
Signal-to-Noise Ratio:better than 45dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
A compact four-track stereo
tape recorder from the Roberts company from around 1966 with a 100kHz
bias oscillator specifically designed to for FM multiplex recording.
This machine still utilised valve circuitry in an age when most tape-recorders
were heading in the direction of solid state electronics.
Features included a single motor, 3 speeds,
pause control, an anti-backlash rocker arm to reduce tape spillage, “accurate”
VU meter, electrical switching and two 5″ x 7″ extended range
speakers. Maximum reel size was 7″ and an automatic tape shut
off was also provided.
The unit came with two dynamic microphones and
retailed in the USA in 1966 for about $230.00
Valve complement: 12AT7 x 2, 6BM8 x 2, 6CA4 / Audio output power: 5 watts per channel / Inputs: 2 microphone 2 radio / phono / Speaker(s): two built in 5″ x 7″ speakers / Dimensions: 13¼ x 7½ x 13¾” (337 x 191 x 349 mm) / Weight: 35 lbs (15.9 kg) / quarter-track stereo