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Analog FM Tuner  










FT-101A


Etude
MD-100
FT-11






The FT-11 is a remarkably sensitive and highly selective FM tuner. While its external design purposely expresses simplicity, its internal circuitry reflects state-of-the-art in analog FM tuner design.

Audio output from the FT-11 is uncommonly transparent. As such it represents exceptional value to those whose true listening interests identify qualitatively with the source. In that regard, the FT-11 has already proven its credibility.

Technically, the FT-11 is an extension of the same superb design technology that brought forth the widely acclaimed Dynalab FT-101. Therefore, it too takes full advantage of precision IF filtering and specially designed "group-delay" circuitry. Such a concentration results in proportional station separation, thus ensuring that all the original source information made available within the transmitted signal is accessible for full audio enjoyment.

The FT-11's functionality will appeal to all FM enthusiasts. Its control functions are straightforward and, being the in "on" out "off" type, makes their status easy to read. This is in contrast with digital control systems that provide status in a sometimes-confusing array of digits and lights. Well illuminated, oversize panel meters provide both an accurate means of tuning to the center of the stereo signal and a continuous monitoring of incoming signal level.

Features

  • A unique feature with the FT-11, being an analog design, is the convenience of presets. The three provided are tuned manually by the user and may be reset at any time.

  • In the manual mode, tuning is continuous through a smooth-running, rotary control precision, multi-turn potentiometer which provides the necessary control voltage for the tuning varactors.

  • Stereo and mono modes are user selectable. Unique in the Dynalab design is stereo separation which is keyed to the strength of the incoming signal. Thus, blending occurs automatically whenever the strength of the incoming signal drops below the level established for full quieting. This allows for noise-free reception by reducing channel separation, rather than having to switch into mono in order to receive a quiet program.

  • Muting is user-selectable and keyed to the noise level within the received signal. With MUTE invoked, the program signal will be squelched whenever the noise level rises above a preset level, such as when moving between stations.

  • Large, easy-to-read panel meters provide continuous display of "center tune" and incoming signal strength. The tuned station frequency is displayed in soft, green, 0.5" numerals. The digital display is driven by an independent frequency counter that derives its information from the tuner's local oscillator circuitry.

Why Analog?

In contrast with the frequency synthesis method of tuning, analog is not dependent on a digital microprocessor chip to establish the tuner's receive frequency. With analog, tuning is accomplished using specially-selected, discrete components in the tuner's critical "front end." In the Dynalab design, these components are selected and matched so that a unique balance of sensitivity, selectivity and sound can be maintained.

However, the most significant advantage in analog is that is delivers control into the hands of the user. With the FT-11, infinite tuning is available in order to establish maximum stereo separation or to detune slightly in order to minimize on-frequency noise. With frequency synthesis tuners, this capability is offered usually in fixed, 50KHz steps. While FM stations themselves are rarely found to be transmitting outside the +-2KHz standard, FM station signals that are rebroadcast over cable may not be quite so precise.

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