TRIO AF-270
¥ 23,500 (around 1960?)
Commentary
FM/AM stereo tuner compatible with AM-AM stereo broadcast transmission and FM broadcasting.
The FM tuner section was compatible with a wide range of frequencies from 76 MHz to 108 MHz, and was also compatible with the sound of terrestrial analog TV broadcasting.
The FM tuner section is equipped with an AFC (Automatic Frequency Stabilization Circuit). Once the channel is selected, the tuning point is fixed and stable reception is possible.
Equipped with a tuning indicating meter, accurate tuning is possible.
FM stereo multi adapter can be connected, and you can also enjoy FM stereo broadcast transmission.
The AM tuner is equipped with a unique hetero filter (noise elimination circuit).
Model Rating
| Type | AM/FM multi-stereo tuner |
| Receiving frequency | FM : 76 MHz to 108 MHz AM : 535 kHz to 1605 kHz |
| Sensitivity | FM : 3 μ V/100MHz (S/N 20 dB) AM : 40 μ V/1MHz (S/N 20 dB) |
| Output voltage (30% modulation at 500 μ V input) | FM:0.8V AM:0.25V |
| Frequency response (electrical fidelity) | FM : 20 Hz to 20 kHz -2dB AM : 20 Hz to 8.1 kHz -3dB |
| Heterofilter | Attenuation of 40 dB or more at 10 kHz (at AM reception) |
| Intermediate frequency | FM:10.7MHz AM2:455kHz AM1:437.5kHz |
| Used vacuum tubes, etc. | Total 10 balls 1 diode 6AQ8x2 6BE6x2 6BA6x3 6AU6 6AL5 6X4 OA79 |
| Pwer | 100 VAC / 110 V, 50Hz/60Hz |
| Power consumption | 65VA |
| External dimensions | Width 380x Height 110x Depth 240 mm |
| Weight | 6.3kg |