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DYNACO PAT-4

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Technic details

Specifications

Type:
Solid-state Stereo Pre Amplifier
[Frequency characteristics]
AUX: 10Hz to 100kHz, ±0.5dB
Phono: 20Hz to 20kHz, ±1dB
Total harmonic distortion: 0.05% or less (2V output, 20Hz to 20kHz)
Intermodulation distortion rate: 0.05% or less
[S / N ratio]
Phono: 70dB (10mV input)
AUX: 85dB (0.5V input)

[Gain]
Phono: 54dB (At 1kHz)
AUX: 20dB
[Tone controls]
Bass: ±16dB (50Hz)
Treble: ±12dB (10kHz)
High Filter (Switch):
15kHz
10kHz
7kHz
Output level:
10V (High impedance)
5V (600Ω)
[Input impedance]
Phono: 47kΩ
Tape head, High level: 100kΩ
Audio output: 600Ω
Tape: 600Ω
Input terminals:
Phono (High, Low, Ceramic)
Tape head
Special (MIC, Phono 2nd)
Tape amp
Tuner
Spare
Output terminals:
For audio (2 sets, 1 set with switch)
Front panel output
For tape recording
Controls:
Selector switch, Volume control, Balance control, 2 Bass control, 2 Treble control, Loudness compensation switch, Tape Monitor switch, Low Filter switch, Palred Stereo / Mono switches to provide A or B channels independently or combined (A + B) with 6dB blend for 3rd channel output, or Stereo, Illuminated power switch
Semiconductors used:
Transistors x 8 pieces
Diodes x 2 pieces
Optional:
PAT-4 / PAS-3X common wooden case (¥ 3,900, around 1970)
Power AC Outlet:
Unswitched x 2
Switched x 2

Power supply:
AC 120 / 240V, 50 / 60Hz
Power consumption:
5W
External dimensions (W x H x D):
345 x 105 x 205mm
Weight:
4.5kg
Year:
Around 1970

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