• Country
• Great Britain (UK)

• Manufacturer / Brand
• Leak, H.J.; London

• Year
• 1955 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 114277

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 2

• Valves / Tubes
• EF86 EF86

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Point One - Leak, H.J.; London

• Shape
• Book-shelf unit.

• Notes

• A Mono Pre-Amplifier, to use with the Leak TL/10, TL/12 or TL/25 Power Amplifiers.

  Description.
  Circuit: A low distortion on two-stage feedback tone control pre-amplifier that draws its   L.T. and H.T. supplies from the main amplifier.
  Input Selector: A six-position switch for choice of inputs from:
   Tuner: Response, level. Sensitivity 80 mV. r.m.s.
   Records: Sensitivity 14 mV.
   There are four separate characteristics available, these being:-
     (a) Audio Engineering Society and RCA New Orthophonic.
     (b) Columbia (U.S.A.) LP and Decca (London) FFRR LP.
     (c) National Association of Radio & Television Broadcasters
        and H.M.V. (Angel) LP.
     (d) BRITISH 78.
   Tape: Response, level. Sensitivity 80 mV. r.m.s.
        Input resistance, 100kΩ .
  Treble Control: Continuously variable from +9dB to-15dB  at 10 kHz.
  Bass Control: Continuously variable from +12dB to +13dB at 40 Hz.
  Volume Control and Switch: The switch controls the amplifier.
  "From Tape Replay Amp.": This input jack accepts signals from a tape replay amplifier.
  "To Tape Record Amp.": This jack permits the user to record on to tape from radio or   records when using a recorder embodying a low level recording amplifier.
  The following components are mounted on the rear of the pre-amplifier:—
     (1) Co-axial plugs and sockets for tuner and pick-up connections.
     (2) Pre-set controls for adjustment of inputs from tuner and pick-ups.
     (3) A terminal strip to which a load resistor may be fitted for
         the correct matching of various types of pick-ups.
     (4) An octal socket, marked "Tuner" from which H.T. and
         L.T. supplies may be drawn for a tuner unit.
     (5) An octal male socket for connecting to the power amplifier:
  Dimensions: Front panel, 10¾ x 3½". Chassis, 9⅜ x 2¾' x 3¾" deep.
     Finish: Front Panel in gold. Black lettering and knobs.

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• -- Original prospect or advert (Brown Brothers Ltd 1955 Catalog No. 520 Page 125)

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 46 models, 45 with images and 23 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Leak, H.J.; London