Accuphase T-109V (1999–2005)

Name: Accuphase T-109V
Brand: Accuphase

FM stereo tuner with quartz synthesis, advanced DGL detection, and 32-station memory, produced from May 1999 to June 2005.

Overview

The Accuphase T-109V is an FM stereo tuner developed as an upgrade to the 1993 T-109, offering refined sonic characteristics and performance. Manufactured from May 1999 to June 2005, it features a redesigned front panel to match the styling of contemporary Accuphase components. The tuner includes a quartz synthesizer tuning system and a pulse tuning control via a manual rotary knob, with station presets for 32 FM stations. It supports both balanced and unbalanced audio outputs and includes a remote commander for operation.

Specifications

Receiving frequency	76.0 MHz to 90.0 MHz
Station memory	32 stations
Output voltage (±75 kHz deviation)	1.0 V
Output impedance	Balanced (XLR): 200 Ω; Unbalanced Fixed: 200 Ω; Controlled: 1.25 kΩ max
Power consumption	15 W
Power supply voltage	100 VAC, 50/60 Hz
Dimensions (W×H×D)	475 × 140 × 402 mm
Weight	9.5 kg
Antenna input	75 Ω unbalanced (F-type)
IF bandwidth settings	Normal, Narrow
Tuning system	Quartz synthesizer system
Detection system	Advanced DGL system
Audio outputs	Balanced XLR and RCA phono jacks
Meter function	Switchable: antenna input level or multipath condition
Other features	Noise Filter, Muting Switch, Mono Switch, Output Level Control

Design

The T-109V’s front-end uses a double-tuned antenna circuit and a cascode amplifier FET with minimal feedback for high-frequency amplification. The input gate includes a PIN diode attenuator controlled by a microcomputer based on antenna signal level. The detection section employs an Advanced DGL (Differential Gain Linear) circuit with a 2.4 MHz wide-band amplifier, a high-speed comparator, and a delay circuit using 24 high-speed C-MOS ICs to delay phase by 114 degrees, minimizing distortion and maximizing signal-to-noise ratio. The stereo decoder uses a ceramic resonator and a voltage-controlled positive/negative reactance circuit within a PLL system to generate a precise 38 kHz switching signal.

Context

The T-109V is positioned as an evolution of the T-109, offering improved sound quality and performance. It is listed among Accuphase’s classic tuner models, including the T-100, T-101, and T-106, reflecting its role in the brand’s high-fidelity product lineage.

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