Pioneer SX-42
¥ 49,900 (around 1965)
Commentary
AM/FM multi-integrated stereo amplifier with equalizer for 4-track tape.
The tuner section is an RF tuning type using a 3-row varicon, equipped with a self-excited tetrode front end, four stages of intermediate frequency including two stages of limiter, wide-band ratio detection, and AFC.
A new type of tuning meter is used for tuning instructions.
A push-pull circuit using 6BQ5 is used for the amplifier.
Equipped with tone control, loudness contour and low / high filter.
The power supply employs a voltage doubler rectification system using a silicon diode.
Equipped with a stereo indicator.
Model Rating
| Type | Stereo receiver |
| Tuner Section | |
| Receiving band | FM : 76 MHz to 90 MHz AM : 535 kHz to 1605 kHz |
| Sensitivity | FM : 2 μ V (IHF) AM : 20 μ V (IHF) |
| Antenna | FM : 300 Ω balanced input AM : Ferrite Loop Stick Antenna Loop Stick Antenna |
| Separation | 35 dB or More (1 kHz) |
| Amplifier Unit | |
| Effective power | 15W + 15W (1 kHz, 1% or less distortion factor) |
| Music power | 20W+20W(IHF) |
| Frequency characteristic | 20 Hz to 50 kHz ± 1 dB |
| Residual noise | 1.5mV |
| Input sensitivity (Input Voltage Required for Effective Output) |
MAG:2.7mV CER/X'tal:29mV Tape-head:1.8mV Tape-playback, Aux : 200 mv |
| Equalizer | Phono MAG : NF Type RIAA Tape-head : NF type NARTB |
| Tone control | CR Type |
| Loudness contour | ON-OFF enabled |
| Output terminal | For Speaker : 8 Ω / 16 Ω Switching Type Stereo headphone jack (can be used at all times when the amplifier is operating, with speaker terminal ON-OFF switch) Tape rec connector DIN Standard Tape Recorder Reconnector |
| <General> | |
| Vacuum tubes and diodes used | 18 balls with 11 stones 6BQ5x4 12AX7x5 6C9x1 6BA6x2 6AU6x2 6BE6x1 6AV6x1 6AQ8x2 OA-70x4 OA-79x4 SD-1Ax2 IS85x1 |
| Power supply voltage | 100 VAC / 117 V (Switching Type), 50Hz/60Hz |
| Power consumption | 154W maximum |
| External dimensions | Width 445x Height 150x Depth 440 mm |
| Weight | 15.7kg |