What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Dokorder Model 8140

Versatile 2-channel/4-channel record and play deck with multi-sync record function.
Multi-track recording at a moderate price.
That's the 8140. Four channel or two channel recording or playback, overdub, quadraphonic,sound-on-sound, echo, ... everything you need to help translate what you feet into what others will feel.
All for a lot less money than you think.

4-track,Multi-sync Recording
Molybdenum Heads with orginal owner Lifetime Guarantee
Three motor Solenoid-Controlled Transport
Adjustable Tape Equalization
Switchable Tape/Source Monitoring
Instantaneous Pause with Looking Feature
Separate Input/Output Controls
large, Illuminated meters
Electronic Echo and Sound-on-Sound

Recording System: 4-track, 4/2 channel stereo/mono rec. & play
Tape Speeds: 7-1/2ips, 3-3/4 ips
Reel Capacity: 7" (5'' minimum)
Rec/P.B. Frequency Response:
at 7½ ips: 25 Hz - 26 kHz (±3 dB, 30 Hz - 23 kHz)
at 3¾ ips: 30 Hz - 18 kHz (±3 dB, 30 Hz - 13 kHz)
Signal-to Noise Ratio: Better than 58 dB (WRMS)
Crosstalk: Better than 55 dB
Wow and Flutter:
at 7½ ips: 0,07% (WRMS)
at 3¾ ips: 0,10% (WRMS)
Equalization: NAB
Bias Frequency: 130,000 Hz
Input Sensitivity/Impedance per Channel :
MIC: 0,8mv/10 kΩ
Line: 80 mV/20 kΩ
DIN: 8 mV
Output Sensitivity/Impedance per Channel:
Line: 0 dB/10 kΩ
DIN: 0,775 V/10 kΩ
Headphones: 5 mW/8 Ω
Recording Time (1800-foot tape, 60 Hz):
4-track, 4/2 channel stereo: 90' at 7½ ips. or 270' at 3¾ ips.
4-track, mono: 270' at 7½ ips or 540' at 3¾ ips
Fast Forward/Rewind Time: within 120 sec.
Heads: Four (2 erase, 1 record, 1 play)
Motors: Three (one 4/8-pole hysteresis synchronous for capstan, two 6-pole induction type for reels)
Circuit Complementi: 43 transistors, 71 diodes
Power Requirement: 100/117/125/200/220 or 240 V, 50/60 Hz
Dimensions (W x H x D): 16-7/8" x 17-3/4" x 6-3/4"
Weight: 41,9 lbs

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