Audio Database

The

DENON/COLUMBIA 7D50
39,800yen(around the 1968 time)

Description
 
The stereo tape deck carrying the preamplifier using a silicon transistor.

The push button is adopted.

The tape automatic shutoff is carried.

The DIN connector and the level meter are carried.

The one-touch reset type tape counter is carried.

3 speeds are supported.


Rating of a mode
Form Tape deck
Truck form Four trucks, two channels
Magnetic tape velocity 19 cm/s, 9.5 cm/s, and 4.8cm/s
The use maximum reel No. 7
Recording system Exchange bias system
Elimination system Exchange elimination system
Recording time At the time of 4.8 cm/s: Four both-way hours (stereo)
Fast forward/rewinding time 3 minutes and less than (at the time of No. 7 use) 30 seconds
Wow and flutter 19 cm/s: Below 0.15%rms
9.5 cm/s: Below 0.25%rms
4.8 cm/s: Less than 0.3%
Frequency response 19 cm/s: 30Hz-20kHz
9.5 cm/s: 30Hz-13kHz
4.8 cm/s: 30Hz-6kHz
Signal to noise ratio 50dB
Input terminal Mic: -66dBm (10kohm)
Pre amp: -20dBm (100kohm)
Din: -36dBm (10kohm)
Output terminal Pre amp: -4dBm (2kohm)
Din: -4dBm (2kohm)
Power supply voltage AV100V, 50Hz/60Hz
Dimensions Width 380x height 340x depth of 190mm
Weight 9kg