TRIO KT-1100

Commentary

An FM/AM tuner developed as a tuner that can fully bring out the advantages of PCM recording sources.

We have introduced two technologies unique to the trio : a double-convert system that achieves high SN by lowering only the FM carrier component without modifying the modulation signal, and a pulse count method that achieves wide-band distortion-free linear detection.
In addition, a copper-styrene condenser is used as a low-pass filter for pulse count detection to further improve sound quality.

The MPX section uses a new sample-and-hold MPX circuit.
Good separation characteristics are obtained because switching is performed using pulses instead of the conventional square wave.

It uses a direct conversion system, and even when there is a large output station close to it, if it is set to the direct position, it can receive signals without deteriorating the SN ratio.
By combining the RF and IF selectors, it is possible to receive signals from stations under various radio wave conditions. It is also equipped with variable muting and a clean reception filter.

The AM section is equipped with a large-diameter, Hi-Q, low-impedance electromagnetic wave sensitive loop antenna. By improving the performance of the antenna coil by 30%, the AM section is highly sensitive and less susceptible to unpleasant power line noise.
In addition, the IF band is switched to two stages, and the wide-band is best suited for receiving natural sound over a wide band, while the narrow-band is best suited for receiving signals from pre-emphasized broadcasting stations.

Equipped with variable muting, you can set the muting level according to your needs.

The grounding of various signals handled in each part of the FM tuner section is achieved by clarifying the reference point of each part and arranging the relationship between input and output at the point where the frequency is converted. This realizes one point grounding.

Model Rating

Type	FM/AM Tuner
FM Tuner Section
Receiving frequency range	76 MHz to 90 MHz
Antenna impedance	75 Ω unbalance
Sensitivity (75 Ω)	Normal (75 Ω) : 0.9 μ V (IHF), 10.3 dBf (new IHF) Direct (75 Ω) : 4.0 μ V (IHF), 23.3 dBf (new IHF)
SN ratio 50 dB sensitivity	Normal (mono): 1.8 μ V (IHF), 16.4 dBf (new IHF) (stereo): 6.0 μ V (IHF), 26.8 dBf (new IHF) Direct (mono): 6.0 μ V (IHF), 26.8 dBf (new IHF) (stereo): 30 μ V (IHF), 40.7 dBf (new IHF)
Harmonic distortion factor (100% modulation)	mono stereo Wide 100Hz: 0.015% 0.04% 1kHz: 0.03% 0.04% 15kHz: 0.05% 0.35% 50 Hz to 10 kHz : 0.06% 0.12% Narrow 100Hz: 0.03% 0.30% 1kHz: 0.15% 0.20% 15kHz: 0.06% 1.0% 50 Hz to 10 kHz : 0.30% 0.50%
SN ratio (100% modulation)	65 dBf input : 90 dB (mono) 85 dBf input : 90 dB (mono), 85 dB (stereo)
Capture ratio	Wide:0.8dB Narrow:2.0dB
Effective selectivity	Wide:45dB Narrow : 65 dB (± 300 kHz)
Stereo separation	Wide 1kHz: 60dB 50 Hz to 10 kHz : 47dB 15kHz: 40dB Narrow 1kHz: 50dB 50 Hz to 10 kHz : 40dB 15kHz: 33dB
Frequency characteristic	15 Hz to 15 kHz ± 0.5 dB
Image interference ratio (84 MHz)	90dB
IF / Spurious Interference Ratio (84 MHz)	110dB/120dB
AM suppression ratio / subcarrier suppression ratio	75dB/75dB
<AM Tuner Section>
Receiving frequency range	520 kHz to 1650 kHz
Sensitivity (IHF / loop antenna)	9 μ V / 180 μ V/m
Signal-to-noise ratio (30% modulation, 1 mv input)	55dB
Harmonic distortion factor (1000 kHz)	0.2%
Selectivity (IHF)	Wide:35dB Narrow:70dB
Frequency Response (Wide)	30 Hz to 6 kHz
<Output Level / Impedance>
FM (1 kHz, 100% Dev.)	Fixed : 0.75V/2.2k Ω Variable : 1.5V/2.2k Ω
AM (400 Hz, 30% Mod.)	Fixed : 0.25V/2.2k Ω Variable : 0.5V/2.2k Ω
Multipath	Vertical output : 47k Ω Horizontal output : 47k Ω
<General>
Rated power consumption	17W (Electrical Appliance and Material Control Law)
Pwer	100 VAC, 50/60Hz
External dimensions	Width 440x Height 111x Depth 337 mm
Weight	5.4kg