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TAPE RECORDER / AMPLIFIER: PHILIPS  N 4450

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NAME PHILIPS
TYPE N4450/00
SERIAL 0149643
Other Marks Relais powered
Year 1974
Country Austria
Heads 6 Longlife (2xErase - 2xRecord - 2xPlay)
In Forward and Reverse (both ways)
Motors 3x (one HALL Motor for capstan, two DC Volts Motors for Reel-plates)
Tracks IEC
Tape Before and after tape monitoring for listening signal during recording
Constant winding-tension by hydraulic tape tension stabilatizers
Tape Speed 4.75 / 9.5 / 19 cm/sec
Speed Deviation MAX:
  4,75 cm/s                     ± 2%
   9,5  cm/s DIN 45 500 ± 1%
19      cm/s DIN 45 500 ± 1%
Wow and Flutter Messured with EMT 420 A following DIN 45 507
  4,75 cm/s                     = <0,35%
  9,5   cm/s DIN 45 500 = <0,2%
19      cm/s DIN 45 500 = <0,15%
Signal /Hiss   4,75 cm/s                     = >58 dB - D3=3% 
   9,5  cm/s DIN 45 500 = >50 dB - D3=3%
19      cm/s DIN 45 500 = >50 dB - D3=3%
Signal /Hum   4,75 cm/s                     = >45 dB
   9,5  cm/s DIN 45 500 = >45 dB
19      cm/s DIN 45 500 = >45 dB
Play Characteristics   4,75 cm/s 120 + 3180 usec.
   9,5  cm/s   90 + 3180 usec.
19      cm/s   50 + 3180 usec.
Frequency Response   4,75 cm/s = 60 -   8000 Hz within    6 dB
  9.5   cm/s = 40 - 15000 Hz within    6 dB
                  = 40 - 12500 Hz within 3/5 dB (DIN 45 500)
19      cm/s without filter = 40 - 20000 Hz within    6 dB
                                      = 40 - 12500 Hz within 3/5 dB (DIN 45 500)
                   with filter     = 40 - 16000 Hx within    6 dB
                                      = 40 - 12500 Hz within 3/5 dB (DIN 45 500)

NB. The so called filter is the Stereo Interference Filter
on the Tuner (51) and AUX (48) connector
Rumble -10 dB - 30 Hz
Scratch -12 dB -15 Hz
Phys +14 dB -50 Hz / +   6 dB -10 kHz
Echo / Mixing / Duoplay / Multiplay yes / yes / yes / yes (2 ways Forward / Reverse)
Bias within nominal 100 se.
Bias & Erase Frequency 110 kHz (± 10%)
Harmonics Distortion Less than 1% (DIN 45 500)
CONTROLS / SWITCHES Micro left
Micro Right
Recording
Echo / Amp
Volume
Balance
Bass
Treble
Scratch
Rumble
Phys
Timer On/Off
Power On/Off
Cueing Left
Cueing Right
Knob: Tuner / Tape / Aux / Phono
Knob: Automatic / Hand
Knob: Track Selector 1-4 / ST / 2-3
Knob: MP / NOR / ECHO / AMP
Knob: Speed Selector 4,75 / 9,5 / 19 cm/sec.
Knob: NOR / REV
Knob: Postfading speed Fast / Medium / Slow
Open reel selector: 18cm / 26,5 cm
INDICATORS dB Level Left VU Meter
dB Level Right VU Meter
Tape Counter: 4 digit
Clock Timer
Recorder Clock
REC
PAUSE
PLAY
WIND LEFT
WIND RIGHT
START
FRONT PANEL
(Din Jackets)		 Micro Left + ST jacket (24): 3- or 5 Pens 180° DIN
Sensitivity on Stereo Recording: 0,1 mV/2 kOhm
                on Mono  with one micro: 0,2 mV / 2 kOhm
Pen 1= left
Pen 4 = Right
Pen 2 = Ground
Micro Right jacket (25): 3- or 5 Pens 180° DIN
Sensitivity on Stereo Recording: 0,1 mV/2 kOhm
                on Mono  with one micro: 0,2 mV / 2 kOhm
Pen 1 and 4= Right (connected to Pen 4 of jacket (24)
Pen 2 = Ground
Tape In/Out jacket (26) and (50): for 5 Pens 180° DIN
Sensitivity - pen 1 and 4: 2 mV/20 kOhm
                - pen 3 and 5: 100 mV/1 kOhm
(*)            - pen 3 and 5: 1 V/50 kOhm
Headphone jacket (27):  for 5 Pens 360° DIN
Out: Max 3 V/400-600 ohm
Pen 4= left
Pen 2 and 3= Ground
Pen 5= Right

(*) On pens 3 and 5 of TAPE jackets (26 and 50)
      only contents a signal_out during playing with
      switch-in (9) in "TAPE"
      On Monitor jacket (46) always is a signal-out,
      in playing as well in recording and using the amp.
REAR PANEL
(Din Jackets)		 Tuner jacket (51):  for 5 Pens 180° DIN
                           Sensitivity In = 100mV/100 kOhm
Pen 2= Ground
Pen 1 and 5= Right
Pen 3= Left
Phono jacket (47):  for 5 Pens 180° DIN
                            Sensitivity "CRYST"= 100 mV/1 mOhm
                            Sensitivity "DYN"= 1,5  mV/47 kOhm
 Pen 2= Ground
 Pen 1 and 5= Right
 Pen 3= Left
Aux jacket (48):  for 5 Pens 180° DIN
                        Sensitivity - Pen 1 and 4 = 2 mV/20 kOhm
                        Sensitivity - Pen 3 and 5 = 100 mV/1 mOhm
Pen 1= Left
Pen 4=Right
Pen Ground
Pen 5= Right
Pen 3= Left
Monitor jacket (46):  for 5 Pens 180° DIN
Out = 1 V/50 kOhm
Pen 2= Ground
Pen 5= Right
Pen 3= Left
Loudsp L + R jacket (46) and (44)  for 5 Pens 180° DIN
Impedance: 4 - 8 Ohm
Round, thin pen = signal (+)
Wide, flat pen = ground (-)
Remote jacket (43): for 10 Pens for remote
Pen   1 = REC
Pen   2 = STOP
Pen   3 = FAST WIND (left)
Pen   4 = FAST WIND (right)
Pen   5 = PAUSE
Pen   6 = Ground
Pen   7 = "Memory" for the knoblights for tape
                direction "<LEFT"or "RIGHT" (16 or 19)
                 in stop- or pause or during fast winding
Pen   8 = Tape-direction to right (RIGHT >)
Pen   9 = Power (-25V)
Pen 10 = Tape-direction to left (<LEFT)
REELS Up to 18 / 26,5 cm / Fast nominal winding time within 300 sec
DIMENSIONS Weight: 20 Kg
Height: 500 mm
Depth: 210 mm
Width: 520 mm
Power Consumption: 120 Watts
CONDITION EXCELLENT. LOOKS LIKE BRANDNEW!
Recorder got a turn-out, lubrication and tuning
for 26,5 CM OPEN REELS
Service Manual
User      Manual		 YES
YES
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