KENWOOD KT-1100D

Commentary

FM/AM tuner that uses Kenwood's original 4D system and pentacle circuit.

It is equipped with Kenwood's original 4D system.
The front end is composed of a direct linear reception circuit, the IF amplifier is composed of a distortion collecting circuit, the detector is composed of a direct linear loop detector, and the stereo demodulation circuit is composed of a direct pure decoder to improve basic performance.

The Pentacle Circuit, a new layout based on an audio-like concept, has been adopted after clearing the problems of tuners such as circuit design, ground point concept, and stability of high-frequency amplifier.
Since the power supply and each stage are directly connected at the shortest distance, there is no interference between the stages via the power supply, and the low-level playback capability is greatly improved. In particular, the oscillation signal from the local oscillator circuit on the front end has no extra spectrum and becomes a pure frequency, making it possible to transmit a pure FM signal to the next stage and beyond.

We have incorporated our own FM technology into the front-end section to eliminate the negative effects of TV stations and RF video output.

Equipped with an RF selector, it enables direct switching in a strong electric field and distance switching in a weak electric field. Even when there is a close high-power station, interference such as RF intermodulation and intermodulation is suppressed and high-quality sound is obtained.
It is also equipped with IF band wide / narrow switching.

The IF, DCC, and detection sections employ chip components for resistors, magnetic capacitors, FETs, and diodes to reduce mutual interference and eliminate unstable elements such as high-frequency jumps.

Equipped with a Rec calibrator and modulation level meter.

Equipped with a random 16-station preset mechanism and auto-tuning (FM) mechanism.

Equipped with a 3-station program mechanism convenient for recording messages.

Equipped with AM band control.

Model Rating

Type	FM/AM Tuner
<FM tuner>
Receiving frequency range	76 MHz to 90 MHz
Antenna impedance	75 Ω unbalance
Sensitivity (75 Ω)	Distance : 0.95 μ V/10.8 dBf Direct : 10 μ V/31.2 dBf
SN ratio 50 dB sensitivity	Distance Mono : 1.8 μ V/16.2 dBf Stereo : 24 μ V/38.8 dBf Direct Mono : 18 μ V/36.3 dBf Stereo : 240 μ V/58.3 dBf
Harmonic distortion factor	wide mono: 0.007%(100Hz) 0.005%(1kHz) 0.01% (50 Hz to 10 kHz) stereo: 0.01%(100Hz) 0.008%(1kHz) 0.03% (50 Hz to 10 kHz) narrow mono: 0.05%(100Hz) 0.04%(1kHz) 0.1% (50 Hz to 10 kHz) stereo: 0.06%(100Hz) 0.05%(1kHz) 0.3% (50 Hz to 10 kHz)
SN ratio (100% modulation, 85 dBf input)	mono:100dB stereo:92dB
Capture ratio	narrow:2.5dB
Effective selectivity (IHF)	wide:70dB narrow:100dB
Stereo separation	wide 71dB(1kHz) 55 dB (50 Hz to 10 kHz) 45dB(15kHz) narrow 55dB(1kHz) 45 dB (50 Hz to 10 kHz) 40dB(15kHz)
Frequency characteristic	20 Hz to 15 kHz ± 0.5 dB
Image interference ratio (84 MHz)	90dB
IF Interference Ratio (84 MHz)	110dB
Spurious interference ratio (84 MHz)	100dB
AM suppression ratio (65.2 dBf)	70dB
Subcarrier suppression ratio	70dB
Output Level / Impedance	0.6V/1.7k Ω (1 kHz, 100% modulation)
<AM Tuner>
Receiving frequency range	531 kHz to 1602 kHz
Sensitivity	10 μ V / 250 μ V/m
Harmonic distortion factor (1000 kHz)	wide:0.3% narrow:0.6%
Image interference ratio (1000 kHz)	40dB
IF Disturbance Ratio (1000 kHz)	60dB
Selectivity (IHF)	wide:30dB narrow:50dB
Output Level / Impedance	0.12V/1.7k Ω
Signal-to-noise ratio	55 dB (30% modulation, 1 mV input)
<General>
Pwer	100 VAC, 50Hz/60Hz
Rated power consumption (Electrical Appliance and Material Control Law)	18W
Maximum external dimensions	Width 440x Height 88x Depth 331 mm
Weight	4.6kg