Luxman T-100
A digital-synthesis AM/FM tuner documented in three regional voltage variants, and almost nothing else.
Overview
The Luxman T-100 is an AM/FM tuner. The surviving service documentation says so, and it lists a main PC board, an LED/display board, an FM front end, an MPX filter stage, and a station-memory switch bank. That is the layout of a digitally tuned radio, not an amplifier or preamp. The same documentation identifies three build variants: the T-100L for 220V West Germany, a T-100 for 120V North America, and a general-foreign T-100 for 220V. That regional split is one of the few things about this tuner that can be stated with any confidence.
The manual also makes clear this was a microprocessor-controlled tuner. The parts list names a μPD6322C IC, a 4.5 MHz NDK crystal and a bank of eight station-memory switches. The display board carries a dedicated LED display driver. Luxman built the front end around a varactor-tuned FM section with a band-pass filter and a stack of ceramic IF filters. There are also separate MW and LW antenna and oscillator coils, so at least the European variant covered long wave as well as medium wave.
Beyond that, the record is thin. No production years, no original price, and no published performance figures could be confirmed for this page, so the sections below don't fill the gaps with numbers that can't be sourced. A contemporary test report in HiFi-Stereo (July 1986, p.42) described the T-100 as a digital-synthesis AM/FM tuner with AUTO SEEK or single-step tuning, bass and treble tone controls, and connections and switching for two pairs of speakers.
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