Leak trough line 3 owners manual v2

Page 1

TnousH LINE 3.
F.M. TUNER

ammtmmswm-mmmm INSTALLATION ' OPERATION ' MAINTENANCE

MAURITR TECHNICAL SERVICES

ForSe ' 9 Manuals Contact
8 Che Tree Rd, Chinnor

an OX9 4OY
helm-3514594 Fax:- 01844-352554
Emit- enquiriesatmauiunnwtk

CONNECTING THE F.M. TUNER

]. This unit may be used free-standing on a table, or it may be mounted on a panel of any thickness, through
a cut-out of 10%" X3? (27-5 x9-5 cms.). To mount on a panel: take ofi the cover by removing the wing-
screw which passes through a hole in the cover fixing bracket and threads into a hankbush in the centre
of the rear panel of the tuner. Pass the body of the tuner through the cut-out until the front plate butts
against the panel, replace the cover and wing-screw and tightenjust enough to prevent the front plate on the
tuner from slipping on the panel.

2. The mains transformer primary is wound for voltages of l 10, H7, 130, 210, 230, 250 (50 to 60 c/st The

circular voltage selector (situated at the back of the tuner) should be withdrawn to its fullest extent, rotated
so that the arrow indicates the voltage nearest to your supply and then reinserted.

3. When used with a LEAK power amplifier the mains supply for the tuner can be obtained by inserting the
A.C. POWER plug into the AC. OUTLET socket on the power amplifiers The tuner is switched on by
turning the volume control.

4. The 300 ohm aerial input is balanced to earth. When using 300 ohm twin feeder, the conductors should be

connected to the outer aerial terminals. When using an unbalanced 70-80 feeder, the inner central conductor
should be connected to either of the outside terminals and the outer screening connected to the centre chassis
terminal.
In many localities (covering perhaps 80% of the population) good reception of the B.B.C. transmissions
will be possible with an indoor aerial, but it should be remembered that the signal/noise ratio will always
be better with an efficient outdoor aerial. Even with a very sensitive receiver such as this it is desirable to use
an outdoor aerial correctly orientated, the optimum position being indicated by maximum closure of the
tuning indicator pattern.

5. The output voltage from this tuner is approximately l volt r.m.si Due to the use of a cathode follower
output stage the output impedance does not exceed l2,000 ohms. This means that up to 20 ft. of low»loss
co-axial screened cable can be used to connect the tuner to its associated pre-amplifier without audible loss
of high frequencies.

6. This tuner unit is earthed to its associated preamplifier via the screening of the AUDIO OUTPUT lead,
and no additional earth connection should be made to any part of the tuner.

Page 2

OPERATING THE F.M. TUNER

7, The tuning indicator used on this FM, tuner is of the maximum closure type and only becomes operative
when the AFC is switched OFF. ln order to tune in a station. it is therefore necessary to switch off the
AFC and adjust the tuning control until a minimum gap exists between the two vertical light strips. Switch-
ing the AFC 'ON locks the station in tune and removes the HT (84) supply from the tuning indicatort

8. In locations of ver
procedure will sup

Frequency Range:

Drift:

Sensitivity:

Aerial Impedance:

Audio Output:

Multiplex Output:

Power Supply:

Valves (Tubes):

Dimensions:

Mounting:

Weight:

y high signal strength. the sensitivity switch should: be set to
press some ofthe unwanted inter-station noise.

LOCAL; following this

For Service anuals Contact
MAURITRON T HNlCAL SERVIES
8 Cherry Tree Rd, Chinnor
Oxon 0X9 40Y
Til} 01844351 4 Faxs 01844-352554
Emailz- anquiri ntauitmmm

SPECIFICATION

88-l08 MCng
3 ke/smaximum with AFC ON', l5 kcis maximum with AFC OFF.
l-5 micro-volts at the aerial terminals for full l mitingt

The choice of300 ohms balanced or 75 ohms unbalanced.

Cathode follower output delivers approximately I volt r.m.si and facilitates the use
of long output leads with negligible high frequency attenuation.

For connection to a multiplex adaptor to obtain stereophonic reproduction from
stereo F.M. transmissions, where available.

110, 7, I30. 2l0. 230. 250 volts. 5060 CS consumption 45 watts

2 x ECF80. ECC84, ECC85. EFSO, EM84: EZSO. 2 x 0A79. l festoon lamp
6V 2 watt.

ll¥><4¥><8¥ deep.
(291x lO-8><2l cms.).

Free-standing on non-scratch felt feet or panell mounted through a cut-out of
l0§'X3%'(275X9SCmS.)i 1

l2 lbs. 8 025. (5'65 kgs.).