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Thread: PRE 1970's VINTAGE AUDIO EQUIPMENT

  1. #1
    Addicted to Best! Harlequin's Avatar
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    PRE 1970's VINTAGE AUDIO EQUIPMENT

    During the course of rationalising my vintage collection I have been collating old images and taking new ones of some of my vintage collection, and thought that I would start this thread for members to display and discuss ones truely vintage equipment.

    I shall kick this off with some amplifiers based on the classic Mullard 5-20 circuit, Audiomaster 11A mono amplifiers manufactured by W & N Electronics Ltd in London W13 circa 1959. At the time of manufacture they were rather expensive, the mono amplifier retailing at 29-10s-00 and associated control amplifier for 28-15s-00.

    W & N utilized expensive Partridge Mains and C Core Output transformers, further information........



    Manufacturer / Brand: W. & N. Electronics Ltd., London
    Year: 1959 Category: Audio Amplifier
    Valves / Tubes 5: EF86 ECC83 EL34 EL34 GZ34

    Power out 25 W (undistorted
    Notes
    Audiomaster 11a monoblock amplifier 25 watts.

    Distortion 0.1% at 25 watts. Response 15 - 30000 c/s 1 dB. 25 dB feedback. Noise Level -90 dB. Output impedance 4, 8 or 16 ohms. Output 2 x EL34 in push-pull.

    To operate with Audiomaster Conway or monaural control unit.









  2. #2
    Addicted to Best! Harlequin's Avatar
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    For my next instalment.....Sansui AU-111 stereo amplifier circa 1966, a beautifully toned and insightful integrated amplifier and the last valve product from Sansui before the C change move to transistors, Sansui contracted with Hashimoto to wind a wide bandwidth output transformer for their swan song to valves 20Hz - 50KHz. Sansui utilized the 6L6 GC for the output valves however I prefer the 7581A.

    Choose 720 HD


    https://m.youtube.com/watch?v=5rE_zdokFlI


    http://http://www.sansui.us/AU-111.htm

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