Country of Manufacture:United Kingdom
Speeds: 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Mono - Full Track
# Motors: 3
Frequency Response:(all 2 dB): 15 ips: 50Hz - 15kHz
Wow and Flutter:no greater than 0.15%
Signal-to-Noise Ratio:at least 58 dB (unweighted) below peak recording level
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The BTR was a professional recorder designed for the broadcasting and recording industry.
The BTR 1 was first introduced in the late 1940’s, the early 1950s BTR 2 featured push-button solenoid controls which enabled remote control, automatic tape lifters, variable speed spooling and a
modular unit-construction which enabled the removal or addition of various components with ease.
The BTR / 2AM featured two tape speeds, 7½ and 15 ips, selected by a single switch which also adjusted the equalization.
The console consisted of six units: the mechanical unit (deck). the control unit with VU meter. the recording amplifier and oscillator. the recording amplifier and oscillator power unit. the replay amplifier and the replay amplifier power unit.
A system of runners inside the console allowed the units to be partially or completely withdrawn even while the unit was running (if necessary).
Total harmonic distortion: 2% at peak recording level / Bias frequency: 75kHz / Rewind speed: continuously variable in both directions. max 2½ min for 3,250ft / Audio output power: 8 watts (optional monitor unit) / Inputs: up to 600 ohms, 1mW / Outputs: either 200 or 600 ohms /
Console dimensions: 42¾ x 31½ x 28½” (108.6 x 80 x 72.7 cm) /
Weight (all units fitted): 558 lbs (253.3 kg) / full-track mono