TRIO AFX-3
¥ 27,800 (around 1963)
Commentary
AM/FM multi-stereo tuner that supports FM multi-stereo stereo broadcast transmission.
It has a built-in adapter to receive FCC type FM multi stereo broadcast transmission.
Equipped with an FM stereo station indication device developed by Trio engineers, it can search for FM stereo stations even when the number of stations increases.
The FM tuner section uses a 3-row varicon, and the limiter (noise elimination circuit) is double.
The AM tuner section also uses a 3-row varicon, high-frequency amplifier circuit, and ferrite bar antenna to enable stable reception.
It is equipped with a noise filter and can be used to reduce noise when receiving FM stereo broadcast transmission.
Equipped with continuously variable AFC control.
Even when receiving in areas where FM radio waves are strong or weak, stable reception is possible by appropriately adjusting the AFC according to the radio waves.
In addition, when the number of FM stations increases and stations close to each other are selected, the lead-in phenomenon can be prevented.
It is designed to match with Trio's amplifiers TW-30 and W-41.
Model Rating
| Type | AM/FM multi-stereo tuner | ||||
| Receiving frequency | FM : 76 MHz to 90 MHz AM : 535 kHz to 1605 kHz |
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| Sensitivity | FM : 1.9 μ V/84MHz (S/N 20 dB) AM : 2.0 μ V/1MHz (S/N 10 dB) |
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| Practical sensitivity | FM : 2.5 μ V/84MHz (S/N 30 dB) | ||||
| Image ratio | FM : 45 dB or more (84 MHz) AM : 60 dB or more (1 MHz) |
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| Frequency characteristic | FM : 20 Hz to 20 kHz 0.5 dB or less | ||||
| FM multi-section | Separation : 38 dB or more (400 Hz) Distortion Factor : 1% or Less (400 Hz) |
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| Noise filter | 10 kHz, -7dB | ||||
| Accessory circuit | FM Multi Adapter FM multi-stereo indicator FM AFC Noise filter |
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| Used vacuum tubes, etc. |
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| Pwer | 100 VAC / 110 V, 50Hz/60Hz | ||||
| Power consumption | 60VA | ||||
| External dimensions | Width 370x Height 125x Depth 240 mm | ||||
| Weight | 6.5kg |