• Country
• Great Britain (UK)

• Manufacturer / Brand
• Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB

• Year
• 1959 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 271738

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

• Number of Tubes
• 5

• Valves / Tubes
• 6BW7 ECC83 ECC83 EL84 EL84

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Hi-Fi equipment

• Power type and voltage
• Alternating Current supply (AC) / 200-250 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 12 W (16 W max.)

• Material
• Metal case

• from Radiomuseum.org
• Model: Power Amplifier PHA30 - Kolster Brandes Ltd. KB, K.B.,

• Shape
• Tablemodel, low profile (big size).

• Notes

• Mono-block power amplifier for use with KB PHC20 Stereo Pre Amp

  Total harmonic distortion at 12 watts less than 0.1% at 1KHz
  Input sensitivity 200mV
  Hum and noise   -80dB at full output
  Frequency response at 12 watts o/p 20Hz - 20KHz (within 1dB)
  Loud speaker output impedance 3.75 ohm,  8 ohm  or 15 ohm.

  Described in HiFi News April 2015 as "For a first (and only) attempt at hifi, this design is a fine effort"

• Author
• Model page created by Mike Edwards † 25.10.21. See "Data change" for further contributors.

• Other Models

• Here you find 415 models, 372 with images and 253 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB