. The Armstrong super-regenerative circuit . vwwwv Figure 14 Combination resistance and resonance type filter. 16 and 17. 12000 ohm resistance. 18. Fixed condenser—.005 mf. 19. Variable condenser—.005 mf. maximum. 20. Choke coil about .1 to .25 Figure 15 Constructional details of coil No. 20 in Fig. 14. Thecore consists of No. 22 iron wire tightly forced in thehole provided. The Armstrong Super-Regenerative Circuit 37 In Fig. 2 the scheme of connections is considerably different anda filter is necessary. Here the plate current of the oscillator flowsthroug-h the telephone receivers.
. The Armstrong super-regenerative circuit . vwwwv Figure 14 Combination resistance and resonance type filter. 16 and 17. 12000 ohm resistance. 18. Fixed condenser—.005 mf. 19. Variable condenser—.005 mf. maximum. 20. Choke coil about .1 to .25 Figure 15 Constructional details of coil No. 20 in Fig. 14. Thecore consists of No. 22 iron wire tightly forced in thehole provided. The Armstrong Super-Regenerative Circuit 37 In Fig. 2 the scheme of connections is considerably different anda filter is necessary. Here the plate current of the oscillator flowsthroug-h the telephone receivers. The filter circuit consisting of units16, 17, 18, 19 and 20 in Fig. 2 is shown in detail in Fig. 14. The resistances shown are each of 12000 ohms either inductiveor non-inductive. They should be capable of carrying the few milli-amperes flowing in the plate circuit of the tube without trouble. Thecondenser No. 18 is a fixed condenser of .005 M. F. The condenserNo. 19 and the coil No. 20 are tuned to resonance with the low fre-quency oscillator. The capacity of the condenser may vary and .005 maximum, depending on the frequency of theoscillator. The inductance of the coil should be from .1 to .25 Fig. 15 is shown a small coil
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectradio, bookyear1922
