Technical Details
Brand: Sony
Model:TC-640
Category:Mid High Fidelity
Application:Consumer
Electronics:Solid State
Equalization:NAB
Country of Manufacture:Japan
Release dates:1971 - 1974
Original Price: $380
Tracks:1/4 Rec/PB
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Dimension: 14.5 x 15.5 x 9.5" (369 x 395 x 243.5mm)
Head Composition: Permalloy
Head Configuration: Stereo
# Motors: 1
Auto Reverse?:No
Voltage(s): 110-120v
Outputs: RCA
Frequency Response:( 3dB): 7½ ips: SLH tape: 30Hz - 20kHz. Normal tape: 40Hz - 18kHz 3¾ ips: SLH tape: 35Hz - 17kHz. Normal tape 40Hz - 16kHz
Wow and Flutter:less than 0.07% at 7½ , less than 0.11% at 3¾ ips
Signal-to-Noise Ratio:52 dB (normal tape) 55 dB ('SLH' tape)
Sound quality rating:6 / 10
Long-term reliability rating: 7/ 10
Weight: 33lb 3oz (15 kg)
Additional Details
Description
This was a two speed (3¾ & 7½ ips), quarter-track stereo tape deck with a single motor, three heads and a seven inch reel capability.
Other features included a record equalization switch for maximum record/playback characteristics with either normal or special tapes, tape/source monitoring switch, mic/line mixing, sound-on-sound and echo facilities, built-in tape reel locks, scratch filter and separate level controls for each channel.
Additional Info
Harmonic distortion: 1.5% at rated output / Bias frequency: 120 kHz / Semi-conductors: 24 transistors, 9 diodes / Rewind speed: 90 seconds for 1200ft tape / Inputs: mic – 600 ohm impedance, -72 dB (0.2mV) line – 100k ohm impedance, -22 dB (60mV) DIN – 10k ohm impedance / Outputs: line – 100k ohm impedance, 0 dB (775mV) DIN – 10k ohm impedance, -5 dB (430mV) headphones – 8 ohm