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Memorial Laboratory of Yevgeny Zavoisky
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Excursion

In spring 1931 Zavoisky was sent to Leningrad to the Central Radio Laboratory of the Komintern Plant, where he pursued thorough research of superregenerator. There he also designed ultrashort-wave (cophased) generator. Here is an extract from Zavoisky's report about his work in CRL: "…The experimental work, done in the Ultrashort-Wave Laboratory, consisted in the following:

    I. Research on superregenerator:
  1. Common resonance shape of superregenerator;
  2. Mechanisms of resonance shape of superregenerator;
  3. Necessary and sufficient condition for superregenerative hiss mode;
  4. Relationship of superregenerative hiss and different parameters of superregenerator;
  5. Separate generation and modulation;
  6. Explanation for superregenerative hiss and superregenerator sensitivity. The report to be published is based on the researches.
    II. Together with P.M.Vinnik, a staff member of the Ultrashort-Wave Laboratory, we designed new schemes for generation of short and ultrashort waves, which can be characterized in general as following:
  1. The circuits let obtain waves shorter than usual with the same valves;
  2. Due to the circuits the efficiency increases up to 40-50%;
  3. The circuits provide the growth of generator power by valves connection without wave-length changing;
  4. Some operating modes of generator are characterized by extremely high harmonics.
    III. Together with P.M.Vinnik we developed a new type of valve receiver, characterized by the absence of typical detector, which functions are performed simultaneously by generator and the transmitting triode".

  
Superregenerator of 22,5m wave length and its scheme
Superregenerator
of 22,5m wave length

Generator of 45m wave length
Generator of 45m wave length

Installation for Photography of Superregenerator Resonance Curves
Installation for Photography
of Superregenerator
Resonance Curves
 
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