Philips af 729 b

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PHILIPS

Front operated automatic HiFi stereo record
player with Direct Control

SYVLUS FORCE

W AF 729

m

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Performance exceeds DIN 45 500
specification

Rumble better than - 65 dB, wow 5.
flutter better than 0.05 %. and constant
turntable speed through Direct Control
electronics

Shock-proof free-floating sub-chassis
Straight tubular-aluminium toneam'i
with de-coupled adjustable counter-
weight

Aluminium turntable

Very low-friction tonearm bearings
Light detachable headshell

Automatic diameter selection and
pasiiionlng of arm on start of record
Automatic stop. arm mt and return at end
of record

Hydraulically damped arm lift
Anti-skating adjustment for spherical,
and elliptical styll

Direct readout of stylus force

Front operation

Controls for 33V: and 45 rpm. PLAY and
f-tEJECT

Pitch controls with 3-LED~bar actual
speed indication

Attractive tinted dust cover with friction
hinges

Outstanding performance

The AF 729 has a high standard of perfor-
mance. Rumble. for example. is better than
- 65 dB (DlN Bit and wow & flutter is less
than 0.05 % (weighted rms). These very
good figures are attributable to the
thorough desrgn and construction of the
various sub-sections ol the turntable: the
suspension, tonearm. headshell. and
especially the Direct Control eleCiI'OI'lKS
which regulate so premsely the speed of
the turntable.

Speed sensing at the turntable

To ensure that the record always rotates at
exactly the right speed. the rate at rotation
of the turntable Itself is continuously
monitored and regulated by the Direct
Control electronics The turntable. which 15
belt-driven from a separate d.c. motor, has
a tachometer built into it. The output of the
tachometer is converted very accurately
into a dc. voltage whose level is propor-
tional to the actual speed of the turntable.
This Signal is continuously compared With a
stable d.c. reference signal. If anything
tends to alter the turntable speed. the
tacho-derived Signal wrll differ from the
reference: this difference causes the Direct
Control electronics to immediately
accelerateor slow down the drive motor so
as to correct the speed of the tumtabie.

Record speed unaffected by extemnl
influences (e.g. drag of cleaning device)
In addition to impiovmg rumble, wow S
flutter and drift soecmcations direct control
of the turntable speed has the important
advantage that the record speed is un-
affected by external inlluences such as the
drag oi a cleaning devrce or dil'lerent stylus
force. Similarly, the Direct Control elec-
tronics compensate for fluctuations in
temperature or mains voltage and
frequency.

Top-quality tonearm

The straight tubular-aluminium construc-
tion of the tonearm gives it an ideal
combinati' n oi lightness, strength and
rigidity, mLchanical properties so vrtal lo a
top-quality tonearm. Because it is straight.
with the stylus on its longitudinal ans. and
stnce the aluminium headshell is so light.
the tonearm's center-ot-gravity lies very

DIRECT confirm

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