The Fremodyne Superregenerative Superheterodyne Detector For Frequency Modulated Signals
Antique Radio Forums • View topic - ECC84 Fremodyne FM tuner
Return to Antique Radio Discussions. Restoration topics should be put in that category; other topics that don't directly involve radio or radios also belong in other categories. Ads are not permitted. The FM uses just one tube, a dual-triode 14F8 in a super-regenerative circuit. Has anybody ever encountered one of these? I'm curious to know how well the FM on this works, especially more than miles from the transmitter.
Superregenerative receivers radiate a strong, broad, and rough signal. For this reason, it is necessary in most applications to employ a radio frequency amplifier stage ahead of the detector, with thorough shielding throughout the receiver. This versatile circuit combines the action of the superregenerative receiver with the superhetrodyne, converting FM signals directly into audio signals in one double triode tube figure 4. One section of the triode serves as a superregenerative mixer, producing an i-f of 22 Mc. The detector action is accomplished by slope detection tuning on the side of the i-f selectivity curve.