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Title: Siemens E311 receiver Post by: PA0NVD on June 30, 2018, 03:14:32 PM Perhaps interesting for those who don't know this receiver. Quite rare, especially in the USA AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
I have one and it became my favorite receiver. All LC filters, BW 6, 3, 1, 0.3 kHz. triple conversion, first IF 1.3 - 1.4 MHz, second 370 kHz and third IF 30 kHz. Output AF is a E88CC balanced amplifier. All modular and E88CC's all over the place. Mixers ECH81 The receiver ranges from 1.5 - 30.1 MHz in 5 bands. The tuning is free running for easy fast tuning or locked in 100 kHz bands to a 100 kHz crystal in oven The stability when locked is better than 100 Hz at all frequencies and the dial readout better than 1 kHz. What I like the most beside the stability are the fantastic LC filters. Nice smooth curve and low phase distortion. Attached a pic and a block diagram |