Vocal Master VA302E

Shure; Chicago, Evanston, Niles (IL)

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  • Year
  • 1970
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 118890

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

 Technical Specifications

  • Number of Transistors
  • 38
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 100 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Vocal Master VA302E - Shure; Chicago, Evanston,
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 640 x 205 x 380 mm / 25.2 x 8.1 x 15 inch
  • Notes

  • Portable Gesangsanlage (Suffix E = Europa-Version), bestehend aus dem Steuergerät und zwei Lautsprechersäulen VA300S; 6 Eingänge, Federhall, Rückkopplungsfilter und Endstufe mit max. 300W Leistung. Gehäuse: 19-Zoll-Einschub (schräg) im Transporteinschub mit Griffmulden.

    Amplifier Type : All silicon transistor mixer/power amplifier
    Power Output : I00 watts continuous '(RMs); (to 8 ohm load, see Figure 3, Page 7)
    Voltage Gain : 80 db Input Attenuator "Out" (8 ohm load)
    65 db lnput Attenuator "In" (8 ohm load)
    Frequency Response : k2 db 40 Hz. to 20,000 Hz. (typical)
    Input Impedance : 20 ohms lnput Attenuator "Out" 500 ohms lnput Attenuator "In"
    Distortion : 5% maximum at rated output at 1 KHz.
    Hum and Noise : 60 db below rated output
    Speaker Load lmpedance Nominal 8 ohms; operational 5.3 ohms minimum
    Input Clipping Level :Greater than 25 Mv. Input Attenuator "Out" Greater than 150 Mv. lnput Attenuator "In"
    Bass Control Action : t13 db at 100 Hz. with respect to "flat" setting
    Treble Control Action : i10 db at 10,000 Hz. with respect to "flat" setting
    "Aux. Hi-Level" Output Jack : Impedance 5,000 ohms; Output 19 db below speaker
    output (to 8 ohm load); nominal - 2 V at 50 watts to speakers, Clipping Level 4 V.
    "Mic. Level" Output : Hi-Z: impedance 1,000 ohms; Output 30 db below auxiliary output;
    nominal 60 Mv. Clipping Level 120 Mv.
    Lo-Z: impedance 36 ohms; Output 52 db below auxiliary output; nominal 5 Mv. Clipping Level 10 Mv.
    Echo-"To Input" Jack (Output To External Echo Unit) :Impedance 10,000 ohms;
    Output 20 db above microphone inputs with individual volumes at "10"; Clipping Level 3 V.
    Echo-"To Output" Jack (Input From External Echo Unit) : Impedance 40,000 ohms;
    Sensitivity 200 Mv. for rated amplifier output with "Echo Gain" Control and
    "Master Volume" Control at maximum settings; Clipping Level 2 V. with maximum
    setting of "Echo Gain" control. Clipping level increases with reduced
    setting of "Echo Gain" control.
    "Reverb Switch" Jack :D.C. switching (no audio), parallels the Master Reverb
    In-Out Switch. Any cable with a resistance of less than 5,000 ohms may be used.
    Center Notch Frequencies of "Anti-Feedback" Filters : Filter "A" 5,000 Hz.
    Filter "B" 2,200 Hz.
    Filter "C" 1,000 Hz.
    Filter "D" 155 Hz
  • Net weight (2.2 lb = 1 kg)
  • 18.2 kg / 40 lb 1.4 oz (40.088 lb)
  • Mentioned in
  • Funkschau (FS 1970 Heft 24 S. 838)

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