Kenwood KT-5000 (1971–1979)
At 15.4 pounds, it's a compact analog RF design that pulls in stations other tuners can't.
Overview
The Kenwood KT-5000 is an AM/FM stereo tuner that Kenwood's official product archive dates to 1977-1979. Period advertising says otherwise. Print ads in HiFI-Stereo (February 1972, p.87) and High-Fidelity (February 1971, p.120) already promoted the KT-5000 as a current model alongside the KA-5002 direct-coupling amplifier, so the tuner probably hit shelves several years before the corporate archive says. Either way, it comes from the era when Kenwood was courting the separates crowd - buyers who wanted their tuner and amplifier as distinct boxes rather than a single receiver chassis.
This is a no-nonsense FM/AM tuner with a front end built around a dual-gate MOS FET in the RF amplifier stage and a 4-gang variable capacitor. That kind of architecture counted in crowded urban FM bands, where adjacent-channel interference and image rejection separated the serious tuners from the toys. The KT-5000 also has a PLL IC chip in its MPX section. That was forward-thinking for the period, since phase-locked loop demodulation wasn't universal in affordable tuners yet, and it shows in the stereo separation figures.
It measures 17-3/16" wide and weighs 15.4 lbs., so it's a substantial box. The 30-watt power consumption says there's real circuitry inside, not just a decorative faceplate. One Reverb listing simply calls it "a 1970s Kenwood FM/AM tuner," which undersells it.
Key Features
Dual-Gate MOS FET Front End with 4-Gang Variable Capacitor
The RF amplifier stage uses a dual-gate MOS FET, paired with a 4-gang variable capacitor for tuning. This was Kenwood's answer to the sensitivity problem: pull weak stations out of the noise without letting strong local signals overload the front end. The dual-gate FET gives better cross-modulation performance than the single-gate FETs found in lesser tuners of the era, and the 4-gang capacitor provides the selectivity to separate closely spaced stations. Per the spec sheet, usable FM sensitivity (IHF) is 1.8 μV (10.3 dBf).
PLL IC in the MPX Section
Kenwood built a PLL IC chip into the multiplex decoder, which handles the stereo demodulation. PLL-based MPX decoders maintain better stereo separation and lower distortion than the older inductor-based designs, particularly as the signal degrades. The spec sheet claims 45 dB of stereo separation at 1 kHz, though the source itself flags this figure as suspiciously low and seemingly wrong compared to the rest of the page. The circuit architecture suggests real-world performance was likely better than the printed spec.
Step-Type Output Level Control
Period advertising from HiFI-Stereo (July 1972, p.32) highlights the step-type output level control. It lets you match the tuner's output to your amplifier's input sensitivity, rather than relying on a continuous pot that drifts over decades. The FM output level is rated at 1.0 V.
FM Performance
The FM section is where the KT-5000 earns its keep. Mono 50 dB quieting sensitivity comes in at 3 μV (14.8 dBf), while stereo needs 45 μV (38.5 dBf) to reach the same quieting. That's typical for the era, since stereo FM always demanded more signal. Signal-to-noise ratio is rated at 78 dB mono and 73 dB stereo at 65 dBf, so strong stations come through with essentially no audible hiss.
Capture ratio is 1.2 dB, which helps the tuner lock onto the stronger of two stations on the same frequency and reject the weaker one. AM suppression is 60 dB, image rejection 65 dB, IF rejection 95 dB at 98 MHz, and spurious rejection 80 dB. Selectivity (DIN) at ±400 kHz is 50 dB, and local oscillator radiation is 16 dB at 98 MHz, so the tuner won't interfere with other equipment in your system.
Frequency response is rated at 30 Hz to 15 kHz ±0.5 dB, which covers the full FM broadcast band with negligible coloration. Total harmonic distortion is 0.08% mono and 0.15% stereo at 1 kHz, competitive for the period. The antenna input accepts both 300 ohm balanced and 75 ohm unbalanced feeds, so you can run a twin-lead dipole or a coaxial cable from a rooftop antenna.
AM Section
The AM side is less glamorous but functional. Usable sensitivity is 300 μV/m, selectivity at ±20 kHz is 30 dB, signal-to-noise ratio 50 dB, image rejection 40 dB, IF rejection 70 dB, and total harmonic distortion 0.7%. The antenna input uses a built-in ferrite bar, with external terminals also provided. In a fringe AM area, you can attach a long-wire antenna and reach stations the internal ferrite can't.
Collectibility & Value
A Reverb listing shows one sold for $129.00 with free shipping, though no sale date is provided, so treat that as a data point rather than a firm price guide. An Audiokarma forum member reported purchasing a KT-5000 in 2022, noting it was "in very nice shape" but came without the original box or manual. That's typical for a tuner of this vintage. The wood case and metal chassis survive, but paper documentation tends to vanish after five decades.
There's no documented history of common failures or service issues for this model, which may just reflect how little documented owner feedback exists. The dual-gate MOS FET and PLL IC are both solid-state components with long lifespans, and the 30-watt power consumption means the internal power supply isn't running hot enough to cook capacitors the way some high-wattage receivers do.
The KT-5000 offers genuine FM performance at a budget price. It's not a collectible with a cult following, and it won't appreciate the way some Marantz or McIntosh tuners have. HiFI-Stereo (June 1972, p.37) pitched it as part of a "great stereo-mates" pairing with Kenwood amplifiers, promising "the sound, the look, the quality of top luxury components at a middle-of-the-road price."
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