SANSUI PR-333
¥ 15,400 (around the 1950 s?)
Commentary
A mono tuner preamplifier with a built-in tuner.
The tuner section uses a 3-stage variable band system. It can be switched according to the application, either for separation in areas with high interference or for sound quality when receiving broadband broadcasting.
It supports LP/SP record playback by crystal and magnetic pickups, Hi-Fi tape playback by tape deck, and announcement by microphone.
A cathode follower system is adopted.
Equipped with a loudness control.
Model Rating
| Type | Tuner preamplifier |
| Input terminal | A : Antenna E : Ground MAG : Magnetic Pickup X-tal : Crystal Pickup Tape : Tape Head Mic : Dynamic microphone (50k Ω) Aux : Tape recorder, FM tuner, etc. |
| Output terminal | Low impedance output terminal using cathode follower method |
| Receiving frequency | 535 kHz to 1,605 kHz |
| Bandwidth | ± 3 khz, 7 khz, 12 khz (3-stage variable) |
| Equalizer | NF Type SP, LP (Phono) Tape(BTS) Mic(FLAT) |
| Tone control | NF Type Bass : + 13 dB ~ -17dB (50 Hz) Treble : + 13 dB ~ -18dB (10 kHz) |
| Loudness circuit | Can be adjusted separately from the volume adjustment |
| Amplification factor | MAG:46.5dB X-tal:21dB Mic:52dB Tape:50dB Aux:17.5dB |
| Tuning instruction | Use Magic Eye |
| Telegraphy | Thailand |
| Used vacuum tubes, etc. | Vacuum tube 6BE6x1 6BA6x1 12AX7x2 12AU7x1 6E5Mx1 Diode OA-79 |
| Required power | 6.3 V, 1.7 V, 250 V, 20 mA |
| External dimensions | Width 370x Height 100x Depth 250 mm |
| Weight | 4kg |
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