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non-solderable surfaces for soldering. #3030 can be soldered to, with conventional tin-lead solders. The paint is tack free and fully conductive in 15 to 30 rain. It is completely dry in 16 hr. at 25 C. An elevated temperature of 175 C. reduces complete drying time to ยฝ hr.
Manufacturers of thin-film metal resistors can use silver-filled paint to connect leads to the heat-sensitive metal fihn. After the resistor leads are imbedded in the ceramic base material, a conductive path can be painted between the lead and the thin metal film. This procedure offers two important advantages: (1) damaging soldering temperatures are avoided; and (2) Connections are made quickly and easily.
๐ SIMILAR VOLUMES
Simple helium dewars have been constructed using gas-cooled radiation shie/ds and multilayer aluminized plastic insulation. They will retain one litre of liquid for up to 40 hours The shields may be made mostly non-conducting so the dewar can be used with ultrasensitive superconducting magnetometers
A simple, portable instrument for the determination of carbon dioxide concentration in atmospheric air by non-aqueous titration is described. The method can be used in the range 10-10,000 p.p.m. 50-ml air samples containing about 300 p.p.m. CO2 can be analyzed with an accuracy of +\_\_ 39/0. With in
An inexpensive, mobile ยฎeld rainfall simulator and runo plot frame were developed for use on hillside vineyards. The simulator framework and components were lightweight, readily available and easily manageable such that they can be handled by one person during transport, setยฑup and operation. The vi