Grey metal rectangular box with 3 large dials down centre and 3 terminals at one end Dials show different levels - capacitiesMaker's plate: Techtron - Techtron Appliances - Melbourne - Australia Type: R3D1 Serial: 101resistance control box, terminals, ohms dials, techtron appliances, scientific instruments

Related to objects 450 and 451.Resistance decade box constructed from rectangular base of ferrous metal with black plastic top. Top displays five circular dials with three smaller circular dials on the right. Embossed plaque at front: 'J. L. WILLIAM / SCIENTIFIC INSTRUMENTS / SERIAL No 3012 / TYPE RR5S / MELBOURNE / AUSTRALIA' Engraved and filled white on top plate from left to right: 'ABSOLUTE OHMS AT 20 C / MANGANIN' Label reading 'PHYSICS PT 2 222 A4' Logo reading: 'J. L. WILLIAM / SCIENTIFIC / INSTRUMENTS / MELBOURNE / SERIAL No 3012' 'ZERO RESISTANCE / 0.006 OHM' Dials labelled underneath with unit measurements engraved and filled white.decade box, resistance decade box, j. l. william, electrical equipment, scientific instruments

This milli-volt meter was manufactured after 1950 and used by the SEC Vic (Kiewa Hydro Electricity Scheme) from that date until late 1900's. It was used to measure very small voltages associated with the operation of the various Hydro Generators. The readings were able to be shown by the resistor in use in the current circuit. During this time period, high quality testing instruments were either sourced from Europe or England.This milli-volt meter is very significant to the Kiewa Valley as it was used by those electrical technicians, who were part of the Kiewa Hydro Scheme. An "off spin" from the Scheme was the beginning of an explosion in "human" resources into the Kiewa Valley. This influx of population transformed the region from that of a basically quiet rural region to one which evolved into both industrial and larger residential community. This evolution in the Kiewa Valley created a change, not only in the "physical" landscape(better roads and infrastructure), but also the socio-economic growth within the Valley allowing other "tourist" based industries to expand within the valley and Alpine areas.This millivolts DC meter was used in the 1950's. It is contained in a wooden box and has two coloured (red/black, positive and negative) screw tight knobs which have bake-lite connections. It also has a covered (black tin) view meter marked from zero to 10 millivolts. Underneath this and within a round bake-lite is a small adjustment screw. The top of the box is fastened onto the main structure by six brass screws. The back of the structure is fastened by eight brass screws and there are four small bake-lite rest knobs.On the face of the millivolt compartment , and at the top "TO BE USED WITH DIAL HORIZONTAL TEMP. COEF. +- .08 % PER oC. Underneath the scale "MILLIVOLTS D.C. F.G." (LEAD RESIS. .05 OHMS)" underneath and to the left "MADE IN ENGLAND BY" "EVERSHED & VIGNOLES Ltd" and to the right "No. 857842" underneath Regd. TRADE MARK MEGGERkiewa valley tourism, victorian alps, alternate energy supplies, alpine population growth

When this AVOMETER was being utilised in the early 1950's it was at the "leading" edge of electrical measuring instrumentation.The first meter was produced by Automatic Coil Winder and Electrical Equipment Co. in 1923. This model was produced in the time from 1933 to 1951 when it was superseded by the most popular model, Model 8 (1951 to 2008).This AVO meter brought the measuring of three electrical power indicators i.e., amps, volts and ohms into one measuring unit. By using a "one fits all" unit, the carrying of separate measuring devices was reduced considerably. The need for a mountainous and a large area of operational requirements, such as the SEC Vic Kiewa Hydro Electricity Scheme, to minimise the weight of equipment carried by electricians and technicians was of the utmost relevance. The significance of this meter to the Kiewa Valley region relates to the impact of modern technology (at that time) upon a mainly rural environment. This equipment shows how the boost of "modern" equipment into the area because of the "Hydro Scheme" was facilitated a lot faster than would have taken under "normal" evolutionary time. The speed of information on all "new technology" had a relatively slow assimilation rate to those living in rural communities. This AVOMETER is a Model 7 MKII, production pre 1951. This meter measures electrical Amps, Volts and Ohms and has two internal batteries for its power. The main casing is made from aluminium with a bake-lite front. The front has a "window" detailing, with a needle pointer, the amount of electrical power being tested. There are two big dial switches, detailing Direct Current(DC) and Alternating Current(AC) when reading measurements of Ampere, Voltage and Ohms for power. This meter took the place of three or four meters used earlier. Modern meters (2000 onwards) have become digilised and are considerably lighter in weight and smaller. There are two electrical connection leads (one black and one red) each has a removable clasp and is 125cm long.Molded on the front centre panel " UNIVERSAL AVOMETER". Below this and above the left hand dial "D.C. SWITCH" .Above the right hand switch the right "A.C. SWITCH". On the left of each switch is an arrow pointing to it.The left switch is marked with a "+" and the right one with a "-". There is a "divisional 2" mark. Between and below the dials is "CUT OUT" plunger.electrical meters, electrical equipment, sec vic., state electricity commission of victoria, mt beauty, bogong village

This object is believed to be associated with training at the Parkville Secondary Teaching College during the 20th Century.Related to objects 450 and 452This rectangular wooden resistance decade box features four large dials for controlling resistances. The dials are mounted atop a black plastic panel, each with a square base. Three smaller dials are mounted to the right of the large dials.Embossed plaque at front: 'J. L. WILLIAM / SCIENTIFIC INSTRUMENTS / SERIAL No 3960 / TYPE RB4DS / MELBOURNE / AUSTRALIA' Engraved and filled white on top plate from left to right: 'ABSOLUTE OHMS AT 20 C / MANGANIN' Logo reading: 'J. L. WILLIAM / SCIENTIFIC / INSTRUMENTS / MELBOURNE / SERIAL No 3960' 'ZERO RESISTANCE / 0.004 OHM' Engraved on back edge of top panel: 'SECONDARY TEACHER COLLEGE PARKVILLE' Dials are labelled underneath with unit measurements for resistance settings, engraved and in-filled white.j. l. william, decade box, electrical equipment, resistance decade box, scientific instruments

Related to objects 451 and 452Resistance decade box constructed with a rectangular wooden body and black plastic top displaying five large dials and fifteen smaller dials. Unit measurements are inscribed beneath each dial.Left to right on top panel surrounding dials: 'INT / OHMS AT 20 C MANGANIN / PURCHASED BY UNIVERSITIES COMMISSION / J. L. WILLIAM MELBOURNE' Adhered label at center of top, between dials: 'Part 2 W B S' Long front side has an metal panel with paper label and PVC covering demonstrating setup that has 'SERIAL No 416' engraved along upper edge. j. l. william, scientific instruments, resistance decade box, electrical instruments, decade box