DIATONE DA-F900

Commentary

Solid state AM/FM tuner developed aiming at high sensitivity and high selectivity.

An IC and mechanical filter are used in the IF stage to prevent interference.

It uses an LC-type full-fledged carrier leak filter to prevent 19 khz and 38 khz carrier leaks.

It uses a signal meter that shows the electric field strength and a tuning meter that shows the accurate tuning point.

Equipped with a muting switch that can cut out unpleasant noise during tuning.

A mechanical filter is also used in the AM circuit, and high sensitivity and high selectivity are obtained by combination with ferrite bar antenna.

Model Rating

Type	Solid State AM/FM Tuner
FM Tuner Section
Receiving frequency	76 MHz to 90 MHz
Sensitivity	2.0 μ V or Less (iHF)
Distortion factor	0.5% or less (400 Hz, 100% modulation)
Signal-to-noise ratio	60 dB or more
Frequency characteristic	20 Hz to 16 kHz
Capture ratio	2.0 dB or less
Effective selectivity	60 dB or more
AM suppression ratio	45 dB or more
Image interference ratio	60 dB or more
Intermediate frequency interference ratio	70 dB or more
Stereo separation	35 dB or More (1 kHz)
Antenna input impedance	300 Ω equilibrium 75 Ω unbalance
<AM Tuner Section>
Receiving frequency	525 kHz to 1,610 kHz
Sensitivity	18 μ V or Less (IHF)
Image interference ratio	50 dB or more
Selectivity	35 dB or more
Intermediate frequency interference ratio	40 dB or more
Signal-to-noise ratio	45 dB or More (30% modulation, 1mV/m input)
<General>
Output level	FM (400 Hz, 100% modulation) : 0 V ~ 1.5 V AM (400 Hz, 30% modulation) : 0 V ~ 1 V
Attachment mechanism	FM muting Signal meter FM center tuning meter SCA Filters Carrier leak filter FM stereo indicator Mechanical filter Automatic switching between FM mono and stereo Tape recording terminal AM bar antenna Level adjustment volume
Semiconductor used	IC : 1 Transistor : 17 FET : 1 Diode : 20 pcs
Pwer	AC100V 50Hz/60Hz
Power consumption	15W
External dimensions	Width 452x Height 130x Depth 275 mm
Weight	7kg