TEAC AT-200S

Commentary

200 series FM/AM tuners.

The front-end section uses a frequency linear 5-row varicon.
In addition, the circuit uses a dual-gate MOS-FET and a J-FET to obtain excellent interference rejection characteristics, and has passed severe tests in the United States with excellent data.

Two full-fledged crystal filters are used for the IF stage, and together with a high-gain IC, the capture ratio of 1.0 dB, which is excellent at that time, is realized.

FET is used in the muting circuit to shut out local tube noise and noise at the time of tuning and detuning.
Also, the muting level can be adjusted so that the level can be selected according to the electric field strength.

A hybrid IC is used in the switching circuit of the MPX to achieve stable operation.
The 36dB/oct filter circuit is also integrated into an IC to eliminate beat interference.

The connector uses a full-scale 75 Ω connector that can directly connect a coaxial cable (3C-2V).
It is also compatible with 300 Ω impedance.

The AM tuner uses an FET at the high frequency stage and a mechanical filter at the intermediate frequency stage to realize a tuner that is resistant to strong electric fields.

Equipped with a TPI connector terminal that can be connected to the Total Performance Indicator AZ-200.
The AZ-200 allows tuning and multipath detection.

Model Rating

Type	FM/AM Tuner
FM Tuner Section
Receiving frequency	76 MHz ~ 90 MHz (3.95 ~ 3.33m)
Intermediate frequency	10.7MHz
Practical sensitivity	1.8 μ V (IHF standard)
Image interference ratio	100 dB or More (83 MHz)
IF interference ratio	100 dB or More (83 MHz)
Effective selectivity	70 dB or More (± 400 kHz)
Capture ratio	1.0 dB or less
Signal-to-noise ratio	70 dB (input 1 mv, 100% modulation)
Distortion factor	0.3% or Less (Stereo / Mono 400 Hz, 100% Modulation)
Separation (at 100% modulation)	40 dB or More (400 Hz) 30 dB or More (50 Hz to 10 kHz) 25 dB or More (20 Hz to 15 kHz)
Frequency characteristic	20 Hz to 15 kHz ± 0.5 dB (50 μ sec, deviation from de-emphasis curve)
AM suppression ratio	55 dB or More (FM400Hz/100%, AM1kHz/30%)
19kHz/38kHz suppression	60 dB or more
Frequency drift	20kHz
Input instruction	By the tuner input meter
Tuning instruction	By the tuning meter
Stereo display	By the stereo display lamp
Automatic stereo operating level	30 μ V
Muting level	10 μ V ~ 30 μ V
<AM Tuner Section>
Practical sensitivity	100 μ V/m (IHF standard, when bar antenna is used)
Selectivity	30 dB or More (1,000 kHz)
Signal-to-noise ratio	45 dB or More (Input 1 mV, 1,000 kHz)
Harmonic content	2% or less (400 Hz, 30% modulation)
Image interference ratio	70 dB or More (1,000 kHz)
IF interference ratio	80 dB or More (1,000 kHz)
<General>
Connection terminal	Antenna terminal (300 Ω balanced and 75 Ω unbalanced) AM external antenna terminal Ground terminal Semi-fixed output terminal Variable output terminal TPI connection terminal
Operation switch	Power switch Mode selector switch Stereo / mono selector switch High blend switch Muting switch Muting Volume Tuning knob Dial brightness selector switch
Rated Output (400 Hz)	FM Part (100% modulation) AM part (30% modulation) Fix : Variable output : Fix : Variable output : 1.1V/10k Ω 1.1Vmax/2.5k Ω (Maximum) 0.3V/10k Ω 0.3Vmax/2.5k Ω (Maximum)
Semiconductor used	Transistor : 33 Diode : 34 pcs
Pwer	100 VAC, 50Hz/60Hz
Power consumption	20W
External dimensions	Width 419x Height 151x Depth 325 mm
Weight	9.2kg