SANSUI TU-22

Commentary

An FM/AM tuner that uses the latest audio technology and employs highly reliable ICs in each block stage for stability.

A dual-gate MOS-FET is used for the front-end section, making it an FM front-end with a 3-chip configuration.
Together with the precision finished frequency number line type varicon, it has excellent interference rejection capability and S/N ratio, and enables comfortable reception with less distortion even in weak radio waves.

The FM IF section is designed with a 2-element ceramic filter composed of 2 stages (4 elements), and the limiter characteristics are improved by using a proprietary IC.
Compared with conventional single-element devices, the characteristics are much more stable and improved.

A dedicated IC is used in the MPX section to ensure high stability.
A low-pass filter using a coil is also used to prevent beat interference, which is unique to FM stereo.

The AM tuner section uses a high-sensitivity large bar antenna and highly integrated AM dedicated ICs, and the IF section uses a Yaman type 2-element ceramic filter with excellent selectivity and sound quality. These features are designed with sound quality in mind.

The power supply uses a constant voltage circuit to eliminate ripple and voltage fluctuations.

Uses a 2-meter system consisting of a signal meter and a center tuning meter.

The front panel is equipped with an attenuator switch that can be used for FM reception in high-electric-field regions and high-sensitivity outdoor antennas.

It uses a display with a slightly inclined dial to improve visibility.
The frame is a zinc die-cast frame with a two color anodized aluminum finish in silver and black with letters and numbers left behind on the scale surface, plus LEDs for the pointer and stereo lamps.

Equipped with a discriminator output terminal to which a 4-channel adapter can be connected.

Equipped with an FM muting switch, noise between stations can be cut.

Model Rating

Type	FM/AM Tuner
FM Tuner Section
Sensitivity	2 μ V (IHF)
Total harmonic distortion factor	Mono : 0.3% or less Stereo : not more than 0.4%
Signal-to-noise ratio	70 dB or more
Separation	40 dB or More (1 kHz)
Selectivity	60 dB or more
Capture ratio	2 dB or less
Image ratio	55 dB or More (83 MHz)
IF Rejection	80 dB or More (83 MHz)
Spurious response rejection	70 dB or More (83 MHz)
Antenna input impedance	300 Ω Balanced Type 75 Ω Unbalanced Type
Frequency characteristic	30 Hz to 15 kHz
<AM Tuner Section>
Sensitivity	53dB/m (bar antenna, 1 MHz)
Selectivity	30 dB or More (1 MHz ± 10 kHz)
Image ratio	80dB/m or more (1 MHz)
IF Rejection	80dB/m or more (1 MHz)
<General>
Output voltage	0.775V(FM100%MOD)
Auxiliary circuit and equipment	FM attenuator Muting switch Discriminator terminal Two meter system 300 Ω / 75 Ω coaxial antenna terminal
Rated power consumption	9W
External dimensions	Width 400x Height 120x Depth 240 mm
Weight	5.0kg