• Country
• United States of America (USA)

• Manufacturer / Brand
• Philips USA

• Year
• 1978

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 176205

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superhet with RF-stage; ZF/IF 455/10700 kHz

• Tuned circuits
• 11 AM circuit(s)     33 FM circuit(s)

• Wave bands
• Broadcast (BC) and FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 120; 240 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: High Fidelity Laboratories Tuner 673 22AH673 -00/ -22 - Philips USA

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 460 x 140 x 345 mm / 18.1 x 5.5 x 13.6 inch

• Notes
• The Philips High Fidelity Laboratories Series consists of the tuner 22AH673,
  the preamplifier 22AH572 and power amplifier 22AH578.
  Manufactured by Philips High Fidelity Laboratories Ltd. USA.
  
  FM-section
  Tuning range: 87.5...108 MHz
  Aerial input: 75Ω unbalanced or 300Ω balanced
  Sensitivity: 0.8µV (IHF, mono), 1.5µV (IHF, stereo)
  50dB quieting: 2.5µV (IHF, mono), 32µV (IHF, stereo)
  THD: 65dB
  Frequency response: 20Hz...15kHz (+0,5/ -1dB)
  Capture ratio: 1dB
  Selectivity: 83dB (dual generator)
  S/N ratio: 70dB
  Pilot carrier suppression: 65dB
  Stereo separation: 47dB @ 1kHz
  AM suppression: 55dB
  IF suppression: 110dB
  Image response: 110dB
  Spurious response: 110dB
  Muting threshold: 2...20µV (100% modulation)
  Audio output: 1V (fixed and variable).
  
  AM-section
  Tuning range: 520...1605 kHz
  Sensitivity: Long wire 20µV, rod antenna 200µV/m
  Selectivity: Normal AM (Adjacent channel) 40dB
  Image rejection (normal AM): 65dB @ 1MHz
  IF rejection (normal AM) 50dB
  THD: 0.5% @ 30% modulation, 1.5% @ 90% modulation
  Frequency response ±2dB: Norm. AM 20Hz...3kHz, Full fidelity 20Hz...10kHz.
  

• Net weight (2.2 lb = 1 kg)
• 11 kg / 24 lb 3.7 oz (24.229 lb)

• Source of data
• -- Original prospect or advert

• Mentioned in
• HiFi-Jahrbuch 9, Verlag G. Braun, Karlsruhe 1978, S.4-52

• Literature/Schematics (1)
• -- Original-techn. papers.

• Author
• Model page created by Bernhard Nagel. See "Data change" for further contributors.

• Other Models

• Here you find 42 models, 40 with images and 14 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips USA