Brenell Mk5 Sync

Page 1

THE Era/w

MARK 5 TAPE RECORDER

SPECIALLY DESIGNED to meet the more exacting
requirements of those who wish to employ tape
recording for the teaching of music. the drama,
foreign languages or other educational purposes
--in addition. of course, to normal recreational
use and industrial purposes-the new Brenell
Mark 5 has a choice of 4 speeds and many other
additional features of considerable value.

Indeed. as one studies the Specification shown
overleaf. it becomes obvious that no eflort has
been spared to ensure that the quality of its
reproduction attains a very high level.

Nor is this all-for, by means of a 3-position
switch. frequency correction is automatically
applied at 15, 7} and 3% i.p.s. to C.C.I.R. standards.
This ensures that the correct play-back character-
istic-so essential for optimum fidelity-is always
available. The ultra-efficient Brenell Sound-heads
-the carefully designed so K/cs oscillator circuit-

the application of negative feed-bad; to secure a
uniform level throughout the wide frequency band
-the use of a large internal elliptical speaker of
high flux density-all these play their part in
permitting the attainment of a standard of perfor-
mance which will never fail to delight the most
critical ear.

Finally, because it is realised that such a versatile
instrument will be subjected to long and arduous
service. Brenell engineers have developed a Unit
Assembly System which. by permitting the instant
disconnection of any of its several units, makes
internal inspection, lubrication, adjustment or valve
renewal literally a matter of minutes.
The Mark 5 complete
(including 1,200 I). ofmpe and spool)
Crystal microphone 33m. extra.

Ribbon microphone from £7-1 7-611. extra
wm. mum level mote! 69 gns.

64 gns.

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Special Features of the
BRENELL MARK 5
TAPE RECORDER

Three Independent Motors (capstan drive motor being
synchronous) chosen for their high degree of speed stability
with exceptional reliability and endurance.

Four Recording Speeds, lg, 33, 7; and 15 for maximum
versatility under all circumstances.

Instant stop without spillage achieved even at high speeds
by positive mechanical system of proved reliability.

Pause Key to halt tape movement temporarily when recording
or playing back. Permits the easy omission of unwanted
announcements or musical passages and therefore saves tape.

Digital Rev. Counter enables any portion of a recording
to be quickly located when desired.

Hi-Fi Amplifier is of advanced design and. at the turn of a
switch, can be used quite independently of the Tape Recorder.
Thus it becomes available for any public address announce-
ment application or, for example, in conjunction with an
F.M. Tuner and gramophone turn-table as a complete
thdiogram.

Recording Level Indicator. During recording the peak level
is at all times clearly visible on the latest type of miniature
magic eye or recording level meter. In this way recordings of
unvarying quality can be made without the slightest risk of
failure.

Monitoring Facilities. During any recording operation
high impedance headphones (2,000/4,000 ohms) can be
plugged into the socket provided-a great convenience when
recording from a distance or when using a mixer unit.

Permits the use of By dia. Reels. For professional or
other applications where recordings are required to be made
at a speed of is i.p.s., the facility of being able to use 8} dia.
reels will be greatly appreciated.

Azimuth Head Adjustment. This ensures highest quality
of reproduction from commercially prc-recorded tapes and
also permits inlerchangeability with those made on other
machines.

Provision (or extra Soundheads. Additional Soundheads
(up to two in number) can be fitted at any future time for dual
channel operation, for stereophonic sound. for tape moni-
toring, etc.

Fast Re-wind in either direction by switch which auto-
matically lifts pressure pads and withdraws tape from contact
with heads. Full reel of 1.200 ft. of tape can be completely
rc-wound in 45 seconds.

Coloured Signal Lights indicate visually and automatically
the actual operation Iaking place and thereby eliminate all
risk of error.

Abridged Specification

Brenell Record/Playback Head
High Impedance. twin track, with operative gap
at top to conform to British Standards.
Impedance: 1.800 ohms at 1 K/cs.

16.000 ohms at 10 K/cs.

$0,000 ohms at 45 K/cs.
Bias Frequency: 50 K/cs approx.
Optimum Bias Current: 10 mA.
Optimum Recording Current :

100 micro Amps.

Brenell Erase Head
Low Impedance, twin track. with operative gap
at top to conform to British Standards.
Erase Frequency: 50 K/cs.
Erase Power: 2 to 2-5 watts.
Wow and Flutter: Less than 1% at 7* i.p.s.

I Brenell Hi-Fi Amplifier

| Frequency Range :
At 33- i.p.s.: 60/1000 cps 3t 3 db.

I At 71'- i.p.s.: 60/12.000 cps j; 3 db.
At 15 i.p.s.: Ell/16.000 cps i 3 db.

l Sensitivity :

l Microphone: 25 mVs into 2 megohms.
Radio or Pick-up: 100 mVs into 150 K/ohms

l Output: 4 watts into 15 ohms.

Internal Speaker: 9 X 5' elliptical.

l Valve Line up : EF 86, ECC 83, EL 84. E2 80
EM B1 (or equivalents).

l Indicator Lamps: 6~5 volts. 0-2 amp. MES.

I Total Power Consumption : 100 watts.

Working Voltage : 200/250 volts AC 50 cycles

I or 110 volts AC 60 cycles.

Socket 1 (Input) : For high impedance Micro-
| phone (crystal ribbon or moving coil).
Socket 2 (Input) :

I Tuner.

Socket 3 (Output) : For headphone monitor-
ing or to feed signal to external amplifier.

I Two Additional Sockets: Two additional
co-axial sockets are provided on the chassis,
one to permit the amplifier to be permanently
connected with a Radio/Gram input and the
other for monltorlng and playback to be effected

I through an extra amplifylng system, (output
250 mVs into 50 K/ohms).

l Output Socket (at rear) : For use with an

I external loud speaker (15 ohms). Insertion of
the plug into the socket automatically dis-

l connects the internal loud speaker.

Size : 18 ><17 X 9
Nett Weight :

For Plck-up, radio or F.M.

38 lb.

Brenell Engineering reserve the right to alter thl-
specificatlon as modifications are made.

Sale Manufacturers

Brenell Engineering Co. Ltd.
1:: Doughty Street, London W.C.l

Telephone :
Printed in England. l554B

HOLbom 7356 (3 lines)

CAN I 7A]! ZM/362R