Point One TL/12

Leak, H.J.; London

Data
Forum
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Collections

  • Year
  • 1948 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 135659

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 200; 230; 250 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 12 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Point One TL/12 - Leak, H.J.; London
  • Shape
  • Chassis only or for «building in»
  • Notes

  • TL/12 12W. Triple Loop Power Amplifier

    With the RC/PA pre-amplifier and the best complementary equipment, the TL/12 power amplifier gives to the music lover a quality of reproduction unsurpassed by any equipment at any price. It is designed in a form so that the power amplifier can be housed in the base of a cabinet and the small pre-amplifier mounted in a position best suited to the user.

    A Leak triple loop feedback circuit, the main loop giving 26 dB feedback over 3 stages and the output transformer.

    • Push-pull triode output stage. 400 V on anodes.
    • No HT electrolytic smoothing or decoupling condensers
    • Impregnated transformers; tropically finished components
    • HT and LT supplies for pre-amp. and radio units
    • Distortion: at 1,000 c/s and 10 W output, 0.1% : at 60 c/s and 10 W output, 0.19%; at 40 c/s and 10 W output 0.21%
    • Hum and Noise: -80 dB on 10 W
    • Frequency response : ± 0.1 db., 20 c/s-20 kc/s.
    • Sensitivity: 160 mV
    • Damping Factor: 20
    • Input impedance: 1 MΩ
    • Output impedances : 2 Ω ; 7-9 Ω; 15-20 Ω: 28-36 Ω
  • Price in first year of sale
  • 25.75 GB £
  • Source of data
  • -- Collector info (Sammler)
  • Mentioned in
  • -- Schematic
  • Literature/Schematics (1)
  • Silicon Chip December 2009. page 82

 Collections | Museums | Literature

Literature

The model Point One is documented in the following literature.

 Forum

Forum contributions about this model: Leak, H.J.; London: Point One TL/12

Threads: 1 | Posts: 4

I understand the Leak TL/12+ but in this model, Leak TL/12 Point One:

1. I see 2 transformers (T2 and T3) and 1 choke (L1), all black but what is the other unlabelled black cubic object next to them on the rear at the back? Potted capacitors?

2. Where is T1? Not on schematic!

3. What is the curious stove pipe object in the valve line up and'or what is the empty valve socket for?

Best wishes

Josie

Josie Hill, 07.Apr.14

Weitere Posts (4) zu diesem Thema.