• País
• Gran Bretaña (GB)

• Fabricante / Marca
• Leak, H.J.; London

• Año
• 1958

• Categoría
• Amplificador de audio o mezclador

• Radiomuseum.org ID
• 126865

Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.

• Numero de valvulas
• 2

• Válvulas
• EF86 EF86

• Principio principal
• Amplificador de Audio

• Gama de ondas
• - no hay

• Tensión de funcionamiento
• Alimentado desde otro equipo o aparato principal.

• Altavoz
• - Este modelo usa amplificador externo de B.F.

• Material
• Metálico

• de Radiomuseum.org
• Modelo: Varislope II - Leak, H.J.; London

• Forma
• Chasis (tambien de autoradio)

• Anotaciones

• A Mono Pre-Amplifier to use with a Leak TL/10, TL/12 or TL/25 Power Amplifier where a microphone input, tape facilities and a variable steep-cut filter are required .

  Description
  Input Selector: A ten-position switch for choice of inputs from:—
    Microphone: Sensitivity, 3 mV. r.m.s. Input impedance 200kΩ.
    Tuner: Response, level. Sensitivity, 50 mV. r.m.s. Input resistance varies from
     100kΩ-250kΩ *
    Records: Input resistance varies from 50kΩ-100kΩ *
    Six separate characteristics are available:
      (a) NARTB.
      (b) AES.
      (c) RCA ORTHO, RCA New Ortho.
      (d) COL. LP. (U.S.A.).
      (e) BRITISH LP.
      (f) BRITISH 78.
    Aux.: Response, level.  Sensitivity, 50 mV. r.m.s. Input, 100-250kΩ *
    Tape: Response, level. Sensitivity, 50 mV. r.m.s. Input resistance 100kΩ.
        * Dependent on the position of the pre-set level control.
  Treble Control: Seven positions providing both treble lift and cut.
  Slope Control: Continuously variable from 50db to 5db per octave.
  Bass Control: Seven positions providing both bass lift and cut.
  Volume Control: The switch controls the amplifier.
  "From Tape Replay Amp.": Input jack for tape replay amplifier
      (of any output impedance up to 50kΩ) embodying playback equalisation.
  "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 preamplifier:
      (1) Co-axial plugs and sockets for tuner, pick-up and auxiliary
         input connections.
      (2) Pre-set controls for adjustment of inputs from tuner and
         pick-ups.
      (3) Octal socket from which H.T. and L.T. supplies may be
         drawn for a tuner unit (or tape oscillator, etc.).
      (4) Octal male socket for connecting to the power amplifier.
  Dimensions: Front panel, 11 5/8" x 4 7/16"
              Chassis, 10 1/2" x 3 9/16" x 4 3/4" deep.

  Price in 1955 £16 16s 0d plus purchase tax.

  See also the similar Leak Vari-Scope Pre-Amplifier which does not have tape facilities.

• Procedencia de los datos
• -- Collector info (Sammler)

• Documentación / Esquemas (1)
• Photofact Folder, Howard W. SAMS (Date 12-58, Set 425, Folder 9)

• Documentación / Esquemas (2)
• -- Original prospect or advert (Brown Brothers Ltd 1955 Catalog No. 520 Page 125)

• Autor
• Modelo creado por un miembro de A. Ver en "Modificar Ficha" los participantes posteriores.

• Otros modelos

• Donde encontrará 46 modelos, 45 con imágenes y 23 con esquemas.
  Ir al listado general de Leak, H.J.; London