Brenell Mark 610M Manuel de l'utilisateur - Page 2

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TRANSPORT SYSTEM (DECK)

3 outer rotor motors (Hysteresis Synchronous Capstan Drive for utmost speed Stability)

Large Dynamically Balanced Flywheel (for minimising wow and flutter in the transport system).

4 Tape Speeds-

15,

7t, 3i and It i.p.s.

Reel sizes- up to Btin. (21 ems.) diameter.

Heads- 3 heads

(Erase,

Record, Replay), t track mono.

Tape Tension- Light fr iction brake (adjustable from top of deck

to ensure correct tension forcall reel sizes)

Fast Rewind + Wind-on times -

under 60 sees. for I 200ft. (360m .) tape.

Braking System -

Positive, reliable system, self compensating with lining

wear.

Pause Mechanism -

Robust, simple to

operate,

lockable.

Position Indicator -

digit revolution counter. Push Button cancellation.

Wow and flutter measured on Gaumont Kalee wow and flutter

me:

t er.

15 i.p.s

less than 0.05%

" 0.08%

Ct.Ol%

End of tape or tape breakage

auto-stop.

.. 0.12

TAPE AMPLIFIERS

Separate record and replay amplifiers.

Record Amplifier .:-

Inputs for magnetic Pickup.

Ceramic

Pickup.

Microphone (Sensitivity 100 microvolts- overload 55dB)

{Optimum mic. impedance 200-'250 ohms).

Auxiliary Signals (Sensitivity 5 millivolts- impedance 250K ohms)

NAC..,

47 /'(

(Radio- Hi Fi Pre-amps, etc.)

eJI.-'

Compensation for pickups selected by single push button.

,_,

-t

Mixin& of inputs- by pressing appropriate buttons, mic and pickup signals may be mixed for recordine and P.A. purposes.

Record Level Metering- A laree, edgewise scaled, illuminated

eter

enables precise recording levels to .be maintained

Replay

Amplifier~:-

Power Output -

15 watts into 8 ohms @ 1% distortion

8 watts into 15 ohms @ I% distortion.

Bass Control -IBdB to+ 18dB@ 50Hz ( c/s).

Treble Control -15dB to + 15dB @ 12KHz (Kc/s).

Output Sockets for

Ext.

Speaker (8 to 15 ohms) Type BS666.

Ext.

Amplifier (220mV from fully modulated tape)

BS666.

GENERAL

Frequency responses (Record/Replay) :-

i.p.s.

(38cms.) 40Hz to 22KHz

±2dB.

i.p.s.

( 19cms.) 40Hz to 20KHz ±2dB.

3! i.p.s. (9.5cms.) 50Hz to 15KHz

±3dB.

i.p.s. ( 4.75cms.) 60Hz to 8KHz ±3d

Signal to noise ratio -56dB unweighted

A/B Switching -

Provision is made for "off the tape" monitoring and direct comparison of recording with the original signal.

The replay signal level may be independently controlled by the A/B balance control in order to obtain the correct replay level

at all speeds for critical comparison of recorded signal with the original.

Internal Speaker- A high quality speaker is fitted-this will be automatically disconnected when ext. speaker is used.

Amplifier Tape Speed Compensation -

4 push buttons are provided to enable the correct recording and replay compensation

circuits to be

selected.

These are deliberately not linked to the speed change switch so that individual requirements of operators

may be

met.

STRAIGHT AMPLIFIER

pressing the "A" button the preampl ifier circuits of the recording amplifier (prior to recording compensation circuits) are

coupled to the main amplifying circuits of the replay amplifier, thus there becomes available a versatile, powerful Hi-Fidelity amplifier

such as Q,ne would normally purchase as a separate

unit.

The Specifications under these conditions are as follows :-

Power Output- 15 watts into 8 ohms for 0.02

distortion.

8 watts into 15 ohms for 0.02

distortion

Input sensitivities for above output levels :-

Mic.

2 millivolts

Mag. P.up

47K ohms

Cer.

160

1.5 megohms

Radio

250K ohms

Bass Range@ 50Hz -18dB to +

18dB.

Treble Range@ 12KHz -15dB to + 15dB.

Overall Frequency Response (with Bass and Treble controls to central (flat) position):

±2dB 20Hz (c/s) to 30KHz (Kc/s)

Signal/Noise Ratio of Straight

Amp.

Auxiliary position 78dB.

The recorder is designed for vertical or horizontal operation.

Size of Cabinet- 171in. X 16lin. X Sin

Weight- 37 lbs

. nett.

-+le ""/ t;.

(

(.)(...

' -

Brene/1 Engineering reserve the right to alter the specification as modifications are made.

Brenell

Engineering·

Co. Ljd.

231/235

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Tel

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827

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