Tandberg 3001A

Programmable FM Tuner (1980-94) The Tandberg 3001 A is an analog tuner. By this I mean that it does not employ frequency-synthesized tuning. The analog approach was selected by Tandberg's talented engineers not so much because they could use a familiar (and perhaps easier-to-read) dial scale and dial pointer, but rather so that they could achieve the highest possible signal-to-noise ratios-in excess of 90 dB in mono and well over 80 dB in stereo. The front-end employs eight ganged, tuned circuits to obtain startlingly high selectivity when needed. The tuning elements are voltage-controlled capacitance diodes, and dual-gate MOS-FETs are used in the r.f. and mixer stages. In addition to the main tuning system, there is a tuning circuit that permits eight preset FM station frequencies to be stored in memory. This particular circuit is based on a voltage-synthesis principle combined with a fast analog servo loop that achieves maximum signal-to-noise ratio and frequency stability. The i.f. filter circuits can be switched to three different bandwidths (wide, normal, and narrow). These filters consist of phase-linear block filters, plus pure LC filters, to achieve high selectivity with extremely low distortion. The special limiter circuit used in this design provides exceptionally good AM and spurious-response rejection. In addition, it ensures a constant signal output over a very wide range of input signal levels.

Type: Mono/Stereo Tuner Tuning Bands: FM Tuning Scale: Analogue FM Tuning Range: 87.5 to 108 MHz Sensitivity: 5.0uV (FM) Signal to Noise Ratio: 92dB (FM) Distortion: 0.1% (FM) Selectivity: 30dB (FM) Frequency response: 30Hz to 15kHz (FM) Dimensions: 435 x 350 x 83mm Weight: 7kg