Audio Database

FM-8
Commentary

FM tuner with MPX adapter switch.

It is equipped with a multiplex adapter connector is compatible with FM stereo broadcasting (stereo broadcast transmission) and multiplex broadcasting.

The 6R-HH2 high-gm tube for TV is used for high-frequency amplification and frequency mixing, and the 6EJ7 high-sensitivity new-type tube is used for the intermediate frequency amplification stage, enabling high-sensitivity and low-noise reception.

Equipped with an AFC circuit, the limiter operates even in the weak electric field region, suppressing the tuning peculiar to FM and enabling stable reception.

The power supply has a well-regulated circuit built in.

It uses a simple configuration that can be operated only by switches and dial knobs.

It adopts a small vertical design.

Model Rating
Type FM tuner
Receiving frequency 80 MHz to 108 MHz
Intermediate frequency 10.7MHz
De-emphasis property 50 μ s c/s
Sensitivity 13 dB / μ V at S/N 30 dB
Output voltage 1 V (input 60 dB / μ V, 400 Hz, at 40% modulation)
Bandwidth 200kHz(-3dB)
Used vacuum tubes, etc. Vacuum Tube 6R-HH2x1
6AQ8x1
6EJ7x2
6BA6x1
6ME5x1
6X4x1
Diode
OA-81x2 (Germanium Diode)
Telegraphy Tesa
Pwer AC100V/117V/240V, 50Hz/60Hz
Power consumption 35.5VA
External dimensions Width 112x Height 117.5x Depth 317 mm
Weight 3.5kg