TRIO WX-400
¥ 49,200 (around the early 1960 s)
Commentary
FM/AM multi-stereo tri-amplifier capable of receiving FM multi-stereo.
The power amplifier section uses a push-pull circuit using 6BQ5.
In addition, the preamplifier section is fully DC ignited, and there is no hum sound even when playing a record.
The FM tuner uses a 3-row varicon, and by adopting a circuit such as a double limiter, stability and high sensitivity are achieved.
A high-frequency amplifier circuit with a 3-channel varicon is used for Nakanami broadcasting.
Equipped with ferrite bar antenna.
It is equipped with a noise filter so that even when the noise of the FM stereo broadcast transmission comes in, it can receive sound with reduced noise.
Equipped with FM stereo indicator.
It is equipped with functions such as loudness control, tape monitor circuit and tone control.
Model Rating
| Type | AM/FM Multi-Stereo Tri-Amplifier |
| Tuner Section | |
| Receiving frequency | FM : 76 to 90 MHz AM : 535 to 1605 kHz |
| Sensitivity | FM : 1.9 μ V/84MHz (S/N 20 dB) 2.5 μ V/84MHz (S/N 30 dB) AM : 2.0 μ V/1MHz (S/N 10 dB) |
| Image ratio | FM : 45 dB or more AM : 60 dB or more |
| FM frequency characteristics | 20 Hz to 20 kHz 0.5 dB or less |
| <FM Multi Section> | |
| Frequency characteristic | 50 Hz to 15 kHz 0.5 dB |
| Separation | 38 dB or More (400 Hz) |
| Distortion factor | 1% or Less (400 Hz) |
| <Audio section> | |
| Output | Maximum : 20W + 20W Undistorted : 18W + 18W Mono : 40W |
| Gain (input voltage required for each output 16W) | MAG:2.4mV XTAL:27mV AUX, Tape Play : 145 mv |
| Tone control | 50 Hz : + 11 to -10dB 10 kHz : + 11 to -10dB |
| Rumble filter | 50 Hz, -7dB |
| Noise filter | 10 kHz, -7dB (FM stereo only) |
| Loudness control (Volume-30dB) | 100Hz:+10dB 10kHz:+10dB |
| Equalizer | RIAA |
| Residual noise (Volume max, Tone flat, 16 Ω) | MAG:30mV Aux:4mV |
| <General> | |
| Accessory circuit | Built-in FM Multi Adapter FM stereo indicator FM AFC Rumble filter Noise filter Loudness control Tape monitor Equalizer amplifier DC ignition Stereo horn jack |
| Semiconductor used | Vacuum tube 6BA6x3 6BE3x1 6AU6x2 6AL5x1 6AQ8x3 12AX7x6 7247x1 6BQ5x4 EM-84x1 8 diodes |
| Pwer | 100 VAC / 117 V, 50Hz/60Hz |
| Power consumption | 180VA |
| External dimensions | Width 450x Height 140x Depth 355 mm |
| Weight | 14kg |
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