Martel fax-200c
  The FAX-200C was similar in size to the 150C. However, it had more features and provided more power. Electronic design had changed but the number of tubes did not change - there were 16 of them in total. The main difference, however, was the operation of the power amplifier in the Push & Pull system. Despite the fact that 6BM8/ECL82 power tubes were used, the receiver was able to provide (according to the manufacturer) a music power of 10 W per channel. The FAX-200C can work with speakers with a resistance of 8 or 16 ohms. The device was powered by a voltage doubler based on semiconductor diodes. The receiver had a headphone output and a "Loudness" switch. In addition, there was a mode selector switch on the front - inverted channels / stereo / mono / left channel / right channel (of course, left or right on both channels at the same time). The receiver has an extremely "modern" electronic design since the tuner, stereo decoder, RIAA preamplifier and the first stage of the preamplifier were mounted on printed circuit boards.
Radio reception was possible in the MPX stereo system FM 88-108 MHZ and additionally there was an AM band. Tune indicator was made with a "magic eye" tube 6ER-13. Stereo indicator was a neon bulb.

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