DENON DP-21F
¥ 42,800 (around 1982)
Commentary
A full auto player with an electronically controlled tone arm.
The turntable drive is driven by a linear drive motor using DENON's unique magnetic recording detection method. Combined with an electronically controlled tone arm, it realizes a highly reliable full-auto mechanism.
In addition, a newly developed microprocessor is used for the control circuit, and the DENON quartz with bidirectional servo ensures reliable rotational performance.
The tone arm section uses an electronic control tone arm that uses DENON's unique contactless system.
The newly developed microprocessor drives the horizontal motion and lifter motion with two separate dedicated motors. Manual operation of the horizontal motion and lifter motion of the arm can be used even during performance. In addition, the non-contact structure prevents mechanical constraint even during operation of the auto mechanism, ensuring excellent arm sensitivity and operability.
In addition, an electronic servo lifter is used to maintain a constant speed during the up and down movement of the arm without being affected by the needle pressure or ambient temperature, thereby suppressing the shock of the needle tip and record.
The tone arm is equipped with an electronic needle pressure application type dynamic balance type straight arm.
It uses the torque of a vertical drive motor to apply an appropriate needle pressure at all times. The needle pressure can be increased or decreased freely by manipulating the needle pressure volume during performance.
The cartridge is equipped with DL-60 MM type cartridge.
Equipped with quick repeat mechanism as full auto function.
This function allows you to resume playing from the beginning of the record without returning the tone arm to the arm rest when you want to listen repeatedly.
Selected text Self-illuminated buttons are used.
The buttons for record size, rotation number, repeat, and lifter are self-illuminated using LEDs so that the operation status can be checked at a glance.
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Model Rating
| Type | Full auto player |
| <Turntable portion> | |
| Drive system | Bidirectional servo direct drive |
| Motor | Linear drive motor |
| Speed control system | Speed servo and phase servo by frequency detection |
| Number of revolutions | 33 1/3, 45 rpm |
| Rotational speed deviation | 0.002% or less |
| Speed switching mechanism | Soft touch push button |
| Wow flutter | 0.02% (Rotating System) 0.03% (JIS) Wrms or Less |
| Signal-to-noise ratio | 75 dB (DIN-B) or more |
| Startup time | Within 2 Seconds (at 33 1/3rpm) |
| Power supply voltage characteristics | 0% for 90 to 110 v variation |
| Load characteristic | 0% (Needle Pressure 80g Outer Circumference) |
| Turntable | 30 cm Aluminum Die-cast |
| Tone Arm Section | |
| Type | Dynamic balanced semi-integrated Straight contact free electronically controlled servo tone arm |
| Effective length | 220mm |
| Overhang | 16mm |
| Tracking error | 3 degrees or less |
| Needle pressure variable range | 0 ~ 3g |
| Applicable Cartridge Dead Weight | 4 ~ 6g (including screws and nuts) |
| Output code | Low Capacity Cord (Approx. 1.2m) |
| Attachment mechanism | Contactless electronic anti-skating mechanism |
| Cartridge Section | |
| Type | MM Type |
| Model Name | DL-60 |
| Output voltage | 2.5mV |
| Left-right separation | 25 dB or More (1 kHz) |
| Dynamic Compliance | 10x10-6cm/dyne |
| Playback frequency range | 20 Hz to 30 kHz |
| Needle tip | Diamond elliptical needle |
| Applicable Needle Pressure | 1.8 ± 0.3g |
| Dead weight | 4.6g |
| Exchange needle | DSN-60 |
| <General> | |
| Cabinet | Special rigid resin integral molding |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 6W |
| External dimensions | Width 434x Height 105x Depth 360 mm (with dust cover closed) |
| Weight | Approx. 5 kg |