• Country
• Japan

• Manufacturer / Brand
• Pioneer Corporation; Tokyo

• Year
• 1977

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 151000

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common)

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

• Power type and voltage
• Alternating Current supply (AC) / 110; 120; 220; 240 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Stereo Tuner TX-6500II - Pioneer Corporation; Tokyo

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 380 x 139 x 322 mm / 15 x 5.5 x 12.7 inch

• Notes

• A hi-fi AM/FM stereo tuner with an analogue dial housed in a metal case, a wooden cabinet is optional. With an FM/AM analogue tuning meter, Stereo Indicator lamp, Selector switch (FM Mono, FM Auto, AM) and Mute On/Off switch. With terminals for AM and FM antennae, built on adjustable AM bar antenna, RCA phono Line Output sockets.

  Specification
  Semiconductors	FET 1, ICs 3, Transistors 7, Diodes 9
  FM Section
  Circuitry	1 FET, 1-stage RF Amplifier 3-gang variable capacitor, 5-stage limiter, PLL MPX
  Usable Sensitivity	Mono: 10.7dBf (1.9µV)
  50dB Quieting Sensitivity	Mono: 14dBf (2.8µV), Stereo: 38dBf (44µV)
  S/N Ratio at 65dBf	Mono: 75dB, Stereo: 68dB
  Distortion at 65dBf:
  100Hz   1kHz   10kHz	Mono:  0.15%, Stereo: 0.3% Mono:  0.15%, Stereo: 0.3% Mono:  0.2%,  Stereo: 0.6%
  Frequency Response	30Hz-10kHz +0.2dB,-0.5dB 20Hz-15kHz +0.2dB,-1.0dB
  Capture Ratio	1.0dB
  Alternate Channel Selectivity	60dB
  Spurious Response Ratio	75dB
  Image Response Ratio	60dB
  IF Response Ratio	90dB
  AM Suppression Ratio	50dB
  Muting Threshold	10dBf (1.7µV)
  Stereo Separation	40dB  (1 kHz), 30dB (30Hz-15kHz)
  Antenna Input	300Ω balanced 75Ω unbalanced
  AM Section
  Circuitry	1-stage RF amplifier, 2-gang variable capacitor
  Sensitivity:	(IHF, Ferrite antenna) 300µV/m (IHF, Ext. antenna)    15µV
  Selectivity	35dB
  S/N Ratio	50dB
  Image Response Ratio	40dB
  IF Response Ratio	70dB
  Antenna	Built-in ferrite loopstick antenna
  Audio Section
  Output Level/Impedance:	FM:  650mV/4.6kΩ (100% MOD) AM:  150mV/5.4kΩ (30% MOD)

  Versions/Power requirements

  KC	120V AC 60Hz with de-emphasis select switch	Canada
  KU	120V AC 60Hz with de-emphasis select switch	U.S.
  HG	220 and 240V AC 50/60Hz  (switchable)	Scandinavia
  S	110,120,220 & 240V AC 50/60Hz (switchable) with de-emphasis select switch	General Export

  Power consumption: 14 W

• Net weight (2.2 lb = 1 kg)
• 5.6 kg / 12 lb 5.4 oz (12.335 lb)

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• -- Original prospect or advert (1977 Pioneer Stereo Components catalogue)

• Literature/Schematics (1)
• - - Manufacturers Literature (Operating Instructions TX-6500II)

• Literature/Schematics (2)
• - - Manufacturers Literature (Service manual TX-6500 II dated Nov 1976)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 1148 models, 1132 with images and 201 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Pioneer Corporation; Tokyo