. The Bell System technical journal . permalloy tape, one mil thick. Insu-lation is electroplated on the tape in a silicic acid bath, and the tape is woundin ring form. After the standard magnetic anneal of 1000°C in hydrogen,the coating of insulation a fraction of a mil thick adheres firmly to the tape. The smallest coil shown in Fig. 1 seen just in front of the oil filledcontainer in which it is mounted is used for low-power pulse core weighing 7 grams is wound on an isolantite form. COIL PULSERS FOR RADAR 60S The two larger coils shown are used in jxiwer pulsers. Their cores
. The Bell System technical journal . permalloy tape, one mil thick. Insu-lation is electroplated on the tape in a silicic acid bath, and the tape is woundin ring form. After the standard magnetic anneal of 1000°C in hydrogen,the coating of insulation a fraction of a mil thick adheres firmly to the tape. The smallest coil shown in Fig. 1 seen just in front of the oil filledcontainer in which it is mounted is used for low-power pulse core weighing 7 grams is wound on an isolantite form. COIL PULSERS FOR RADAR 60S The two larger coils shown are used in jxiwer pulsers. Their cores aremade up of self-supporting rings. J1ic smaller coil has a core weight of onekilogram and is used at voltages up to 25 kv. for the generation of powerpeaks of the order of 100-250 kw. Phenol fibre is used to support andposition the core and winding. The larger core has a weight of 13 kg. andis used at a voltage of 40 kv. in a pulser generating power peaks,of onemegawatt. Glass-bonded mica and built-up mica are used for support and. Fig. 1—Non-linear ceils used in various radar transmitters. The smallest coil at theleft, seen in front of its container, is used for low power pulse generation. The two largercoils are used in power pulsers developing 200 KW and 1000 KW peaks, core rings of molybdenum permalloy tape are assembled into the coils shown. positioning of the core rings and windings. The coils are assembled withother passive elements of the pulser network and the whole immersed in principles of the two types of pulser circuits in which thesecoils are used are now to be discussed. A schematic of the circuit used for (level()i)ing low-power i)ulses is shownin Fig. 2a. Sinusoidal driving current (/i) is introduced from the left, and asharply peaked wave (/2) is dcveloi)ed in the right-hand mesh. A resonantcircuit (/-iCi) serses to i)revcnt dissipation of the generated pulse in theinput mesh, and to tune out the input re
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