A simple triggered vacuum gap

A simple triggered vacuum gap has previously been described by the authors in this journal (see ibid., vol.5, 415, 1972). Further studies have resulted in improvement of the performance with regard to sensitivity and consistency of the trigger characteristics and immunity from bridging due to metal particles eroded from the arc. The earlier design suffered from rather frequent bridging of the auxiliary gap and showed rather wide scatter in its trigger characteristics. In the present design thermally stable materials like fused quartz, machinable ceramic 'Supramica 500' (Mycalex Corporation of America), lead titanate, barium titanate (LCC HTD) and silicon carbide have been used to insulate the trigger electrode from the cathode. Consistent triggerings free from bridging, at relatively low voltages of 200-400 V have been obtained.

Jungle Perch Kuhlia Rupestris Fingerling Production Manual

This manual consists of written descriptions of jungle perch Kuhlia rupestris production and video material to demonstrate each of the key production steps. Video links are at the end of each major written section in the document. To activate the link use ctrl click. The videos enhance the instructive ability of this manual. The keys to producing jungle perch are:  maintaining broodstock in freshwater or low salinity water less than 5 ppt  spawning fish in full seawater at 28C  incubating eggs in full seawater. Salinities must not be less than 32 ppt  ensuring that first feed jungle perch larvae have an adequate supply of copepod nauplii  rearing larvae in full seawater under bright light  use of gentle aeration in tanks  postponing spawns until adequate densities of copepod nauplii are present in ponds  sustaining copepod blooms in ponds for at least 20 days  avoiding use of paddlewheels in ponds  supplementary feeding with Artemia salina and weaning diets from 20 days after hatch  harvesting of fingerlings or fry after they are 25-30 mm in length (50 to 60 days post hatch)  covering tanks of fingerlings with 5 mm mesh and submerging freshwater inlets to prevent jumping.

Tipovoĭ proekt korovnika na 100 golov

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Proekt tipovogo 2-kh kvartirnogo pereselencheskogo doma

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Proekt tipovogo 4-kh kvartirnogo pereselencheskogo doma

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Proekt tipovogo doma dli︠a︡ pereselencheskikh uchastkov obsluzhivaemykh Agrodzhoĭntom

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Proekt doma

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Tipovoĭ zhiloĭ dom pereselent︠s︡ev evreev Khersonskogo okruga po planu stroitelʹstva 1926 goda

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Proekt glinobytnogo doma tipa 7.50x4.00

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Naruzhnai︠a︡ vkhodnai︠a︡ dverʹ

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Letniĭ okonnyĭ pereplet i ego detali

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Zimniĭ okonnyĭ pereplet

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Proekt tipovoĭ shkoly I i II-kh komplektnai︠a︡

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Delay characteristics of a simple triggered vacuum gap

Firing delays of a simple triggered vacuum gap are reported in this paper. The effects of insulating materials in the auxiliary gap, auxiliary gap current, main gap current and electrode separation on the delay have been investigated. The presence of insulating material in the auxiliary gap having low auxiliary gap resistance appears to exhibit large delay. Delay decreases considerably with increase of current in the auxiliary and the main gaps, but it increases with increase of electrode separation. The scatter in the delay is less than 25 ps and 500 ps with supramica (Mycalex Corporation of America) and silicon carbide respectively at lower values of auxiliary gap current and it becomes negligible for supramica at auxiliary gap currents greater than 6A. This investigation appears to indicate that the simple device can be used as a fast switch.

Ispolnitelʻnyĭ chertezh karkasogo, krytogo cherepit︠s︡eĭ, zdanii︠a︡ dvukh-komplektnoĭ shkoly na poselke "Novyĭ-Putʹ", Krivorogskogo okruga i raĭona

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