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Earthing of DISC inPuts
It is important that ihe L.H. and R.H. screened leads from the pick-up cartridge'
and the chassis lead (sometimes combined in the pick-up lead) should be
connected ONLYto pin 2 of the DIN plug' Do NOT connect to the plug body'
and care must be taken to insulate the'r.16.n' f rom the plug body securing clip'
lf only one disc input is used, we recommend that this should be Disc 1 and
thatthe unused pinr ln the Dll plug, i.e. 1 and 4 should be "earthed" or
"grounded" by connectilg jhgyl.jg Pin 2.
"Adiutiment of disc sensitivitY
The sensi'tivity of the disc input has been carefully chosen to match most of the
high quality cartridges currently available. There are a few cartridges which offer
a much higher outp"ut. the use of which may necessitate a reduction of disc
sensitivity-indicated by a neecl to operate ihe volume control at low settings'
i.e" approaching 7.00 oiclock" Your dealer can do this for you' He should remove
the pre-amplifier covers to reveal two pairs of pins on the print slde of the
printed circuit board at the input end. The pins are linked with thin tinned
copperwire. lf these wires are removed the resultant sensitivity wili be 10mV
instead ctt 2.5 or if they are reptaced by 4.7K ohm resistors the sensitivity will
be approximately 5mV. The overload capacity increases in the same proportion'
This modification alters the sensitivity of both disc inputs-
OP ER AT ION
Control facilities are provided by
oush bottons on the front Panel.
means of f ive rotary controls and thir:teen
The rotary controls offer the f ollowing f acilities:
lrtputSelection-this is controlled by the extreme left hand large knob allowing
five selections to be made-Dlsc 2,D]SC 1, RADIO, TAPE 1 and TAPE 2'
Valume-Continuously variable controlled by the secorrd large knob'
Bass, Treble and Balance-continoously variable controlled by the three smaller
knobs. These three controls have central "click" positions giving "flat" response
in the case of the tone controls and exactly equal outputs per channel in the
case of the balance control.
TAPE
To play pre-recorded tape TAPE 1 or TAPE 2 shoulcl be selected by means of the
1.o1urV control. To record from programme sources: DISC 1, DISC 2 or RADIO'
it is necessary to select the approprlutu source on the rotary control- The selected
input is automatically connected to BOTH tape output sockets' lf.the output
from the morritoring circuit on the tape recorder is connected to the tape input
of the amplifier A-dmonitoring is possible by depressing the relevant TAPE
bLitton. When TAPE 'l is select*d on the rotary control, this input is connected
oNLY to TAPE 2 output socket. Similarly when TAPE 2 is selected this input
is fed oNLY to TAPE 1 output socket. Jhus it is possible to transfer f rom one
tape machine (reel to reel or cassette) to another'
Tape Record Level: Connections to the Tape recorders should be made to their
,,LlNE" or "AUX" inputs and outputs. This will normally require connecting
cableswith a DIN plug at one end ancl four phono ptugs at the other' lf it is
required to use the "DlN" input-as for exampte with some European recorders
which only have DIN inputs, it will be necessary to use an attenuator lead'
A standard ex-factory available item is our "tape Attenuator Lead'l This lead
also permits connection to a monoohonic recorder without the cross-connection
"monoing" everYthirtg else.
In the event of a recorder with non:standard levels we are always pleased to
assist in making up -‚¬ special lead-do not hesitate to ask.
