MEDIUM: Photograph DESCRIPTION: C.type print Black outer frame with glass panel White board inner frameCertificate of authenticity on reverse of imagephotograph, ellis, angus, young, ac dc

What device converts AC to DC? rectifier A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification, since it "straightens" the direction of current. The unit was used at Ballarat School of Mines in the Maths, Science and Physics Departments.Grey metal unit with Dials on the front and vents at the back. Handle for carrying. Two switches for turning on and off. Yellow sticker - SMB - with number 116071. Engraved on back - S.M.B.. Maths / Science / Physics Sticker on cord indicating inspection of unit - 13/04/2005. Tag Number - 032735alternating current, direct current, ac, dc, rectifier, electrical, ballarat school of mines, science, maths, physics

The unit was used at Ballarat School of Mines in the Maths, Science and Physics Departments.Grey metal unit with Dials on the front and vents at the back. Handles for carrying. Two circuit breaker switches, two DC output sockets, two AC output socketsYellow sticker - SMB - with number 116069. Engraved on back - S.M.B.. Maths / Science / Physics Sticker on cord indicating inspection of unit - 13/04/2005. Tag Number - 032725alternating current, direct current, ac, dc, electrical, ballarat school of mines, science, maths, physics, ac/dc, scientific instrument

Electric shaver in ivory-coloured plastic casing with stainless steel head and metal terminal encasing wiring. Three-point plug attached.Front: ARVIN / DE LUXE / AC / DC/ 15W Reverse: MANUFACTURED IN / ENGLAND / PAT No. 524412 / OTHER PATS PENDelectric shaver, arvin

"Marvel" Electric Food Mixer - two beaters affixed to cylindical component that encases electric motor with cord attached - this component attached to metal stand with swivelling device - all metal painted pale green including rotating stand for placing mixing bowl on - black plastic? handle on moveable top section and circular open holes on top and around the sides.Plaque affixed to cylindrical section reads "75 watt/VOLTS AC DC 25 STYLE 21 No 1304082/MARVEL/Electric Food Mixer/Licensed under United States Patents/No's......

Class/Model: 15K. One hundred thousand made between 1890-1957. From Serial No. EH23584 we know the class and model No. How many were made and the date of manufacture. The 15K was used for domestic and industrial sewing. Threads left to right and has a vertical oscillating shuttle.EH 13584. Top: SINGER MANUFACTURING CO (gold) - with wooden base. Side: SINGER. LIGHT - SINGER. Back: SINGER SEWING MOTOR. 230-250 VOLTS 03 AMPS / 25-75 CYC's AC-DC / CAT NO. BRK12-5 /NO. K7003527.singer, sewing machine

Shows the removal and packing of the bulbs used in sub-stations to rectify or change the electrical power from AC to DC for tram use.Demonstrates the removal and packing of mercury arc rectifier bulbsSet of five digital images of decommissioning mercury arc equipment or bulbs at a sub station during 2005. trams, tramways, substation, mercury arc, yarra trams

AC and DC volmeter. 50-150 volt, moving iron. Analogue display, non-linear semi-circular lacquired wood case. Black metal hinged lid for scale window. User instructions inside lid. Three terminal posts, and a contactor, at top end. Leather carry strap top end. Registered trade Mark "Megger" Serial number 137872scientific instrument, voltmeter, evershed and vignoles

The Mixmaster 9B in 1948 was the first Sunbeam appliance to be made in Australia. It was designed in the USA.After years of rationing and shortages, the 1950s were a period of economic prosperity, high employment and great technological development. During this period, Australians enthusiastically adorned their homes with a dazzling range of new domestic appliances. Hire-purchase schemes allowed people to take products home and pay for them in instalments. The American-designed Mixmaster 9B was the first Sunbeam appliance manufactured and sold in Australia in 1948. An early Sunbeam Mixmaster. It is an electronic stand mixer with a black metal base in the shape of a rounded teardrop with two holes for the turntable. It has a cream enameled metal arm, cream coloured metal motor housing with a black plastic handle on the top. On the back of the motor housing is a black plastic knob with ten speed options for the mixer, and the "OFF" position. a black electric cord is attached under the motor housing with a black switch beneath the cord. The motor housing is able to tilt backwards on a hinge which is attached to the top of the stand arm. It is worked on AC or Dc power 240 On the bottom are the words "MODEL 9B". mixmaster sunbeam kitchen-appliance food-technology

Report - 42 pages, 3 sections, stapled on the left hand edge, titled "Report of the Royal Commission appointed to inquire into and report upon the Railway and Tramway systems on Melbourne and Suburbs" - dated 1911. Looks at the state of the Suburban rail system, finances, electrification's, costs, evidence of Mr. Merz, advantages of the electrification, power supply and standards, whether AC or DC, duplication, Glen Iris line, conclusions and recommendations. Tramway - summarises the current tramways operating, cable system and operational stats, the current tramway systems, other cities, relative merits, future tramways for Melbourne, operational speeds, use of cable conduits for electric traction, conversion, municipal control , control of the tramways by the railways, a general scheme, formation of a larger tramway trust and its management, purchase of the cable tramways and recommendations. Note: This document is available as a pdf on the Parliament of Victoria website. 2nd copy added 2-1-2019 from donation of Norm Cross.In ink in the top right hand corner "TB"trams, tramways, tramways, cable trams, finances, conversion, railways, royal commission, costs

Ten page report or article written by A. D. Senior, dated 29 August 1984 titled "Electricity Supply in Ballarat". Gives a background to power supply in Ballarat from 1885, takeover by ESCo, DC and AC power supply, generators, Buniyong, SEC, A and B power stations, farm supply, illumination or lighting, tramways and tram braking systems. Photocopied from original on foolscap sheets with staple in top left hand corner. See also Reg Item 1701 and 1702.Pink highlights on page 1, ink notes, pencil notes on page 3 re Creswick and ink corrections on page 7.trams, tramways, power supply, ballarat, sec, power station, esco

Yields information about the SEC in Ballarat and in particular the conversion from DC power to AC.Newspaper clipping from the Saturday Magazine of The Courier 30/6/1984 titled "50 years of the SEC", looking at the history of the SEC in Ballarat, includes the conversion of plant from DC to AC which was not completed until 1968. Notes the two power stations and SEC offices have been moved to Norman St. Has five photos, including a staff photograph with many names, a photo of Bridge St, a collision between a truck and tram 14, SEC advertising and an interior view of Ballarat A. Written by John Dyallsec, ballarat a power station, sec crews, electrical engineering, electrical systems, electricity supply

Samizone flat file, made from manila card with blue printing for file details and a Dymo machine label on the spine (red background with white printing) titled "Ballarat SEC History". On inside of folder is a "Post It" note with handwriting "Robert Ashley Ex Employee" in blue ink. Contained within folder is" 1. "Ballarat, Electricity and the State Electricity Commission" photocopied from an original. Has typed under the heading over white out correction fluid "Notes - Draft notes prepared by Robert W. P. Ashley 1989." The paper gives the history of power supply in Ballarat, including street lighting, ESCo, AC and DC power supplies, the takeover by the SEC, Ballarat A and B power stations, a copy of an advertisement for the SEC in Ballarat. (See btm1701i3.jpg) titled "The Power Behind the Switch" 2. Paper by A. D. Senior, titled "Electricity Supply in Ballarat" - see Reg. Item No. 1700. (see btm1700i.pdf) 3. Photocopied onto foolscap paper of an extract from possibly a large report on power supply in Victoria. Pages 155 to 158. Reports on the history of the power supply system in Ballarat until the takeover of ESCo by the SEC. Further details are referred to another section of the Report on the SEC itself. On page 158 are details of Beaufort Council operated supply and the start of notes on Beechworth. (see btm1701i2.pdf) Images of files added 6-8-15 For an image of the advert itself see btm1701i3.pdfSee notes above.trams, tramways, secv, power supply, esco, beaufort

Features a photo of a cooking lesson in Electra Hall and the Mayor of Ballarat driving No. 30, following its conversion to the Ballarat style of trams in September the previous year at the time of the inauguration of the new rolling stock. Notes the progress in Ballarat in the last 18 months, reconditioning of the tram lines, the "new" trams, the changeover from DC to AC, new sub-stations, distribution networks and electrical development, including work at the power station. Has an "Important Notice" advising readers of the scope of the Departmental Journal "CONTACT" and its relationship with the social and sporting activities magazine "SEC MAGAZINE". See Reg Item 3011 for a print of the photo of No. 30. Record revised 3/4/2019 to add digital images with those from Andrew Cook CD and to include an item titled "A Page from Geelong" about a fractured pole, two minutes of silence and the impact on power generation and a thankyou letter. Demonstrates the reporting and promotion of SEC activities to its staff and public in Ballarat.Photocopy of an article in the State Electricity Commission of Victoria Magazine, Contact, Vol 1, No. 1, May 1936 titled "Progress in Ballarat". trams, tramways, sec, ballarat, electricity supply, tramcars, power station, electra hall, geelong, poles

Photocopy of an article in the State Electricity Commission of Victoria Magazine, Contact, Vol 3, No. 2, Aug 1938 titled "The Development of Ballarat's Electricity Supply". Two A3 sheets. The item with six photographs details the history of the development of Ballarat's Power Supply. Details development of the initial power supply in Dana St, the take over by ESCo, DC power initially, expansion, introduction of AC in 1925 to Ballarat, the takeover by the SEC in 1934, changeover from DC to AC, expansion to outlying areas, Buninyong, Creswick etc. Gives description of installed plan, boilers, storerooms and the stores systems. Has photos of the Dana St. building, Ballarat A power station, Ljungstrom Turbo Alternator and three of the stores area. Record revised 3/4/2019 to add digital images with those from Andrew Cook CD. Each item had a thin strip of paper attached by staple to the top left hand corner, giving the Vol. No. details.On rear of 2nd A3 sheet in blue ink details of contact with the BTM by M. Sayers prior to sending the material.trams, tramways, sec, power supply, power station, ballarat a power station, esco

.1 - Book - 20 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Air-break knife switches and laminated brush switches for voltages not exceeding 660Volts" - C23 - 1926, August 1926" .2 - Book - 24 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Flame proof air break switches for Voltages Not Exceeding 600Volts", C25-1926, October 1926. .3 - Book - 24 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Flame proof air break circuit breakers for Voltages Not Exceeding 600Volts", C26-1926, October 1926. .4 - Book - 24 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Totally Enclosed air-break Circuit Breakers for Voltages not exceeding 660 Volts" - C27 - 1926, September 1926. .5 - Book - 24 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Totally Enclosed air-break Switches for Voltages not exceeding 660 Volts" - C28 - 1926, December 1926. .6 - Book - 24 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard "Metallic Resistance Materials for Electrical Purposes" - C29-1926, November 1926. .7 - Book - 28 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Face Plate controllers and resistances for use therewith Electric Motors (DC and AC Slip ring)" - C31-1926 - December 1926. .8 - Book - 28 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Australian Standard "Contactor Controllers and Resistances for use therewith Electric Motors (DC and AC Slip ring)" - C32-1926 - December 1926. .9 Book - 36 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Electrical Performance of Industrial Electric Motors and Generators with class A insulation" - C34-1927, October 1927 with a green label dated September 1932 advised that the tentative standard has been endorsed as a Standard with amendment. .10 - Book - 56 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Electrical Performance of Large Electric Generators and Motors - Rating permitting overloads" - C35-1927, April 1927 with a green label dated September 1932 advised that the tentative standard has been endorsed as a Standard with amendment. On top right hand corner has the date stamp of the "The Electric Supply Co. of Victoria Ltd Ballarat" trams, tramways, power station, standards, materials, electrical systems

Information from Norman F. Dalton: Ballarat had a reticulated DC supply in the early part of last century and in 1905 had sufficient generating capacity to enable the trams to be changed from horse drawn to DC electricity. The use of electricity increased with the main power station located on Wendouree Parade, near Webster Street, under the ownership of The Electric Supply Company of Victoria. AC generating plant was installed in 1925 and conversion to AC proceeded. In 1934 the company was taken over by the State Electricity Commission Victoria (SECV) and more AC generation was installed and the changeover of customers was accelerated. This is around the time that the Synchronome Frequency Checking Mast Clock was installed at the Wendouree Parade Power Station. The SECV Annual Report of 1921 states: ::Section 11 of the act directed the COmmission to enquire into the question of securing the adoption of such standards of plant and equipment of a system, frequency and pressure for the generation and distribution of electricity as will admit of the efficient interconnection of undertakings throughout the State. In 1934 when the SECV took over the Ballarat operations the question of linking with the State grid had been a planned operation for some years but due to financial considerations had hindered it and in fact would continue to do so for a further 10 years. So while the need for close frequency control for interconnection was hardly an issue, the need to keep electric clocks correct was important, particularly as this item was a frequent sales point to cover the inconvenience and sometimes expense of converting from DC to AC. The clock is a very accurate pendulum clock with provision for varying effective length during operation for precise time regulation. There are two normal time dials and one is controlled by the pendulum and the other is operated by the system frequency. When the clock was in use it was installed by the MEter and Tests Laboratory and the time was checked daily by radio time signals. The two dials were repeated in the operators control panel in the Power Station. A maximum deviation between the two dials was set in the operating instructions (eg 5 seconds) and the operator would correct this when necessary by remote manual alteration of the turbine governor set point. The clock was used to drive and regulate a system of "slave" clocks which were used to display the time in various locations around the power station. A slave clock is a simple clock which is driven by a small electric motor, its accuracy is regulated by the master clock every 30 seconds to ensure that it and all the other slave clocks in the station are on exactly the right time; slave clocks were placed in various locations, from common rooms to workshops. A master clock could potentially run thousands of slave clocks at one plant. The clock also contains a rectifier. A rectifier is a device that is used to convert AC power to more stable DC current.Two clocks in a timber case. Both are electric, one is powered by the main pendulum mechanism, the other is a self contained electric clock. The main mechanism is of the gravity arm and roller type, which sends an impulse to the slave clocks every 30 seconds. The This Synchronome Frequency Checking Master Clock was used at the Ballarat Power Station. Below the main section of the case is a smaller cabinet containing a rectifier to provide consistent DC power for the clock. The rectifier was made by the Victorian company Hilco, which was located in Burwood. There is a high chance this is not the original rectifier from this clock as there appears to be brackets to hold a larger device in the space the rectifier occupies.Front below main clock face on front of case: "Patented Sychronome Brisbane" Lower left-hand clock face: "Frequency time" Lower right-hand clock face: "Standard Seconds" Synchronous electric clock mechanism on door (Frequency time clock): >200/250 V. 50~ >"Synchronomains" Made in England >Direction indicator for clock starting switch >"To start move lever in direction of arrow and release" >"Patent applied for" Mechanism for "standard seconds" clock: >"English Made" >"Patented" >Serial number "321" >0 above right-hand pillar on front-plate Mechanism for "standard seconds" clock: >"English Made" >"Patented" >Serial number "321" >0 above right-hand pillar on front-plate Mechanism for main clock face: >"English Made" >"Patented" >Serial number "8751" >0 above right-hand pillar on front-plate Inside case, back panel, top enamel plate: >Seconds Battery + Pos. > Battery Common or - Neg. >1/2 min dials Inside case, back panel, bottom enamel plate: external seconds dial Inside case, right hand side, electrical knobs: two switches, both "A.C. mains" Pendulum rod, below suspension spring: Serial number (?) 0000005 Rectifier in bottom cabinet: >"Hilco Rectifier" >"A.C. Volts 230/240" >"Model 1060/S" >"A.C. Amperes" >"Serial No. 1060/S >"Phases 1" >"D.C. Volts 6" >"C.P.S. 50" >"D.C. Amperes 1" >"Made in Australia by Hilco Transformers McIntyre St., Burwood, Victoria." Bakelite electrical plug: makers mark Lower cabinet, RH side panel, pressed tin plate: "AC" (upside down) Brass speed adjustment, outer right RH side: "S" and "F" Ivory and wood pendulum beat ruler: >Ruler, with 0 in centre and numbers 1-5 in ascending order from centre on left and right. > "Synchronome Patent." Steel plate, back panel, inside case, right hand side: >N R A" (descending) >"2191" serial number/part number Face of main clock: "Synchronome Electric" synchronome frequency checking master clock, electricity, state electricity commission, wendouree parade power station, secv, clock, time, pendulum, electric supply company of victoria, norman f. dalton, ballarat power station, rectifier, slave clock

Set of nine Engineering standards that were acquired by ESCo during the 1920's. 2261.1 - British Engineering Standards Assoc. No. 101 - 1921, titled "British Standard Specification for Tramway Tyres" dated July 1921. 12pp + printed cover and a folded tip in sheet printed as plate 1, date stamped ESCo 14 Sep. 1923 - 216H x 141W, with "Tait Book Co. 90 William St. Melbourne" stamp on front cover. Light blue grey cover, with off white paper inside. Saddle stapled, rounded corners. Printed by Waterlow & Sons Limited, 49 Parliament Street Westminster SW1. See image 2261i1 for front cover. Publisher - Crosby Lockwood and Son London UK. - see images btm2261i1 and i2 for scans of the document. 2261.2 - British Engineering Standards Assoc. No. 2 - 1922, titled "British Standard Specification and Sections for Tramway Rails and Fishplates" dated March 1922. 56pp including cover, actual pages 35 - 50 are fold out sheets for plates 1 to 8 with rail sections detailed, date stamped ESCo 8 Jun 1926 - 216H x 142W, with "Tait Book Co. 90 William St. Melbourne" stamp on front cover. Light blue grey cover, with off white paper inside. Saddle stapled, rounded corners. Printed by Waterlow & Sons Limited, 49 Parliament Street Westminster SW1. Publisher - Crosby Lockwood and Son London UK. See image btm2261i3.pdf and i4.pdf 2261.3 -Australian Commonwealth Engineering Standards Association, Standard No. E 1a - 1926T - "Tentative Australian Standard Specifications for Railway Permanent Way Material", dated May 1926. 32pp plus cover, date stamped by ESCo 14 June 1926 - 229H x 157W saddle stapled. Grey cover with off white paper inside. Printed by The Australasian Medical Publishing Company Limited. See image 2261i2 for front cover. Publisher - The Association Sydney, Australia. See images i6 and i7 for a pdf scan of this document. 2261.4 - British Engineering Standards Assoc. No. 2 - 1927, proof issue, titled "British Standard Specification and sections for Tramway Rails and Fishplates" dated 1927. 56pp including cover, actual pages 35 - 50 are fold out sheets for plates 1 to 8, date stamped ESCo 16 Jul 1927 - 216H x 142W. Off white paper covers and text. Saddle stapled, rounded corners. Has "Waterlow" name on front cover bottom right hand corner. 2261.5 - Australian Commonwealth Engineering Standards Association, Standard No. C. 30 -1926T - "Tentative Australian Standard Specification for Drum Controllers and Resistances for use therewith for electric motors (DC and AC slip ring, excluding controllers for traction purposes", dated December 1926. 28pp plus cover, date stamped by ESCo 29 Jun 1927 - 227H x 152W. Grey cover with off white paper inside, saddle stapled. Printed by The Australasian Medical Publishing Company Limited. Publisher - The Association Sydney, Australia. 2261.6 - Australian Commonwealth Engineering Standards Association, Standard No. C 33 - 1926T - "Tentative Australian Standard Specifications for Drum Starters for electric motors", dated December 1926. 28pp plus cover, date stamped by ESCo 29 June 1927 - 227H x 153W. Grey cover with off white paper inside, saddle stapled. Printed by The Australasian Medical Publishing Company Limited. Publisher - The Association Sydney, Australia. 2261.7 - Australian Commonwealth Engineering Standards Association, Standard No. E 13 to 15 1927 T - "Tentative Australian Standard Specifications for Railway Rolling Stock Material, locomotive tyres, carriage wagon and tender tyres, weldless steel angle rings", dated August 1927. 32pp plus cover, date stamped by ESCo 15 Sep 1927 - 228H x 153W. Grey cover with off white paper inside, saddle stapled. Printed by The Australasian Medical Publishing Company Limited. Publisher - The Association Sydney, Australia. 2261.8 - Australian Commonwealth Engineering Standards Association, Standard No. E 22 to 29 1928 - "Australian Standard Specifications for Railway Permanent Way Material", dated January 1928. 64pp plus cover, date stamped by ESCo, but not readable - 228H x 153W. Light purple cover with off white paper inside, saddle stapled. Printed by The Australasian Medical Publishing Company Limited. Publisher - The Association Sydney, Australia. 2261.9 - British Engineering Standards Assoc. No. 101 - 1929, titled "British Standard Specification for Tramway Tyres" dated February 1929. 16pp +cover, pages 13 and 14 are foldout plate 1, held together with sewn thread, - 218H x 142W, with "J. Ewins & Sons, Booksellers and Stationers Ballarat" label on front cover. Light blue grey cover, with off white paper inside. Printed by Waterlow & Sons Limited, 49 Parliament Street Westminster SW1. Publisher - Crosby Lockwood and Son London UK. Yields information about British Tramway Standards which were used on Australian and New Zealand Tramways.Set of nine printed books, centre stapled. trams, tramways, standards, tramway equipment, tyres, permanent way, track materials, electric motors, esco

Megger as the device was called, is in fact its brand name. It is a device that supplies a DC (direct current as per car batteries) voltage to enable testing of electrical apparatus. This particular device produces 250volts DC when the handle is turned vigorously. If an electrical device, such as a kettle or toaster, blew a fuse or tripped a circuit breaker, when switched on, then it must be checked electrically before any more use. Following the repair of the faulty item a megger would be used to check if either of the AC 240volt plugs leads were touching the metal case (earth). The output leads of the megger would be connected with one to the earth (metal case) and the other to each of the power connections in turn. A good megger reading of 50,000 ohms (resistance) would enable the device to be returned to service. A reading of zero ohms resistance would mean that it would again blow a fuse, and was therefore unsafe to use. In the electrical industry e.g. the former State Electricity Commission, a megger would be used to test lots of similar item in sequence. Because of the vigorous job of winding the handle, two persons were often used to save time. One would crank madly whilst the other shifted the leads. This particular megger is of a small voltage, but other meggers are bigger and have a few ranges of DC voltages able to be selected. The optimal megger for large Generating machines was motor driven megger. This was applied to the device being tested for a duration of approximately 30 minutes with reading of the resistance taken at regular intervals.All equipment belonging to the State Electricity Commission of Victoria was labelled with a metal plaque attached to it. The SECV constructed the Kiewa Hydro Electric Scheme in the Upper Kiewa Valley and on the Bogong High Plains. The scheme began in 1938 and finished in 1961 when this megger was used and also possibly later as the SECV remained to maintain and operate the Scheme. This megger is of significance in relation to the advancement of technology.A rectangular box in dark brown bakerlite casing. It has an agent's plaque fixed to the left of the face and on the right is the marker's recessed stamp. In the middle in a transparent window so the level of ohms can be read. The front also has two recessed fixing knobs in black. On one side is a crank handle with a knob that lifts up and is turned vigorously to create the voltage. The back has four recessed screws and four small leather pads. There is a hole on each side to insert wires. There are two copper insulated wires. The SECV Plaque states: State/Electricity Commission/of/Victoria/ Electrical Engineer's Section/ No.1747 The Agent's Plaque states: H. Rowe & Co. Pty Ltd/Melbourne & Sydney/Sole Agents/in Australia for/Evershed & Vignoles Ltd Maker's states: 500 volts/Megger/Regd Trade Mark/Made in England/Patent No/400728electrical meters, electrical equipment, fuses, safety, state electricity commission of victoria, mt beauty, bogong village

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

Six key portable cassette recorder/player with rotary volume control. It can be operated directly from batteries or AC power (cord included). Also has Automatic Recording Level Control Circuitry (ALC), thus no need to adjust volume while recording. In original box with instructions and power cord. (Purchased at Waltons for 29.99).Auto Stop / GAC - logo Top: Condenser mic Rec / Play / Rewind / FF / Eject Left side: Ear O / Remote Mike 00 / Volume Bottom markings: Model No. SW-201 AC: 240V 50HZ 6W DC: 6V (UM - 2x4) Made in Hong Kong Warning: To prevent fire or electrical shock hazard, do not expose this appliance to rain or moisture, do not remove cover, no user serviceable parts inside, refer servicing to qualified service personnel. cassette recorder, gac

Pamphlet or report printed on A3 gloss paper, folded into A4, with a brown printed cover and a photograph of Z3 117, Melbourne, in Bourke St Melbourne, with the destination of City - Spring Rides and in the route number box "New Tram - Free Rides today". Inside pages and rear cover give details of the trams, its equipment specification, how a chopper control works, car control systems, rotary converter for 24V DC and 220V AC systems, drawings of the trams, and technical data, including a simplified wiring diagram. Produced by AEG - Telefunken of Berlin.trams, tramways, z3 class, aeta, specification, preston workshops, new trams, tram z3 117