In a plastic folder is manual without its cover. This is held together with a metal staple at the top left hand side.marine radio and electronic equipment, portable lifeboat equipment

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

This is a set of five photographs of CAPT James ‘Jim’ Leslie Stedman in the field demonstrating the setup of prisms used as electric distance measurement (EDM) receiver reflectors for tellurometer equipment and the sighting of a large surveyor’s light. This equipment was deployed in establishing mapping and geodetic control operations. The photos were most likely taken in the late 1950s or early 1960s. The tellurometers of this era were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. Jim Stedman later reached the rank of Colonel, was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment. See item 6180.16P, photos .14) to .16) for more information and photos of Jim Stedman’s EDM demonstration. This is a set of five photographs of a surveyor in the field demonstrating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) to .2) - Photo, black & white, c1960s, CAPT Jim Stedman demonstrating the sighting of a large surveyor’s light. .3) to .5) – Photo, black & white, c1960s, CAPT Jim Stedman demonstrating EDM prism equipment. .1P to .5P on back – CAPT Stedman EDM Eqpt.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

Mullard Limited was a British manufacturer of electronic components. The Mullard Radio Valve Co. Ltd. of Southfields, London, was founded in 1920 by Captain Stanley R. Mullard, who had previously designed valves for the Admiralty before becoming managing director of the Z Electric Lamp Co. The company soon moved to Hammersmith, London and then in 1923 to Balham, London. The head office in later years was Mullard House in Torrington Place, Bloomsbury, now part of University College London. In 1923, in order to meet the technical demands of the newly formed BBC, Mullard formed a partnership with the Dutch manufacturer Philips. The valves (US vacuum tube) produced in this period were named with the prefix PM, for Philips-Mullard, beginning with the PM3 and PM4 in 1926. Mullard finally sold all its shares to Philips in 1927. In 1928 the company introduced the first pentode valve to the British market. Mullard opened a new manufacturing plant at Mitcham, Surrey in 1929 and in late 1930s Mullard opened a new plant in Blackburn, Lancashire. By 1949 Mullard had produced a number of television sets, such as the MTS-521 and MTS-684 and in 1951 Mullard was producing the LSD series of photographic flash tubes. In the early 1980s, Mullard manufactured the SAA5050, some of the earliest teletext decoding modules made in the UK. In 1957 Philips-Mullard helped to set up the Mullard Radio Astronomy Observatory (MRAO) at the University of Cambridge. Philips continued to use the brand name "Mullard" in the UK until 1988. Mullard Research Laboratories in Redhill, Surrey then became Philips Research Laboratories. As of 2007, the Mullard brand has been revived by Sovtek, producing a variant of the ECC83 and EL34. The Z Electric Lamp Co. continued business into the 1970s operating from premises in Thornton Heath, south London, manufacturing lamps of specialised design but it closed due to the recession in the mid 1970s. Sovtek is a brand of vacuum tube owned by Mike Matthews's New Sensor Corporation and manufactured in Saratov, Russia. They are often used in guitar amplificationA box with a 'Mullard' valve for a radioTop of box : MULLARD / ELECTRONIC VALVE / Side of box; GAURANTEED ELECTRONIC / VALVE / MULLARD ( in a shield) : mullard radio valve co. ltd., london, mullard captain stanley, electronic equipment, moorabbin, bentleigh, cheltenham, early settlers

Belonged to Mrs. Whiteley, mother of Jill Sebire. Used in the 1940's.Early green transistor radio with hard plastic cover.radio equipment, transistors, electronic equipment

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

Document - policy - report - 28 A4 pages, stapled in the top left hand corner titled, "Metropolitan Transit Authority of Victoria - Tram and Bus Division - Tram Repair Policy". Has table of contents. Looks at the identification of tasks between the tram construction and maintenance branch of the Tram Servicing branch. Includes notes on Bogies, bodywork and fitting, electrical and electronic equipment, W class air equipment and W class mechanical braking equipment.Has a list on the top right hand corner for distribution and "c1988" in ink.trams, tramways, mta, w class, maintenance, construction

In April 1993, the Arthritis Foundation of Victoria (AFV) held a Self-Help Group Seminar in Yarrawonga. The seminar featured contributions by the Joint Action Group (JAG). This photo depicts three women sitting on the edge of the stage at the event.B&W photo of three women posing for a photo, sitting on the edge of a stage. One woman is wearing a VicHealth Masters Games t-shirt; another woman is wearing a Yarrawonga Lake Mulwala 1989 t-shirt. On the stage, there is a vertical Arthritis Foundation of Victoria banner with a large photo poster of the Joint Action Group on the lower panel. On the wall at the rear of the stage, there is a portrait of Queen Elizabeth II (1926-2022) and two framed tapestries. On the stage, there is a piano, some electronic equipment with an antenna on top of a small cabinet, a chair, and an A-frame sandwich board with the "Joint Action" logo on it.arthritis foundation of victoria, afv, outreach, self help groups, seminar, joint action group, jag, yarrawonga, 1993

This transformer lamp system, which has a dial to transform 240 volts to a minimum of 32 volts was used by electrical technicians to inspect internal parts of the large generators (even in small confined spaces). The reason for the reduction of the 240 volts to the 32 volts was for the safety of the inspector. The SEC Victoria Hydro Scheme's electrical generators are powered by the hydro force of "stored" water at a higher altitude. The establishment of both the NSW and Victorian Hydro schemes was achieved from the mid 1900's to the 1960's. At this the point in time the need for additional power sources to quench both an industrial and domestic demand for electricity was purely an economic and not and environmental (carbon reduction) factor. This hydro scheme was instigated by "the Government of the day" as a bold move and was the major force of the World War II refugee and "technical" workforce inclusion of skilled and unskilled migration into the Australian environment. Although this mass "invasion" of workers with families was thought of in some circles as intrusive, the expansion of population post war years and its integration into the Australian rural sector, produced the multi- lingual multi-cultural diversity of later years.This transformer lamp is very significant to the Kiewa Valley as it was introduced as a very small part of the explosion of human resources into the 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 valley created a change, not only in the "physical" landscape but also the socio-economic expansion which permitted other "tourist" based industries into the valley. This is also a specific electronic item which was manufactured in Melbourne and not sourced from Europe or Asia. This demonstrates the fast evolution of Australian technology to a high standard compatible to that of the rest of the world.This heavy hand held electrical transformer (transforms 240 volts to 32 Volts) an has one leather handle on the top with three small (gauze filtered) air holes. It also has two 2 pin directional cable distribution (clipsal) in/out points 10amps / 240 volts. There is one glassed in volts/ac meter and one variable switch (180 to 150 voltage in settings of 10 volt increments.There are two vents (one on each of the smaller sides). There is also one three pin electrical lead coming out from the top.On one side is a manufacturer's plaque with "ELECTRONIC A & R EQUIPMENT MELBOURNE" and underneath "TYPE 1719, PRI V. 180 250" underneath "V.A. 1250" underneath "CYC 50" underneath "SEC V. 115" underneath "SEC A. 10 . 8". The label on topside "CAUTION SET SWITCH TO 250 v BEFORE CONNECTING TO MAINS THEN, WITH EQUIPMENT OPERATING, SET METER TO RED LINE.kiewa hydro electricity scheme, victorian state electricity commission, transformers

From Scarborough Maritime Heritage Centre: A Yacht Log was a nautical instrument for measuring a vessel's speed and distance travelled. When navigating a ship it is essential to be able to estimate the boat's speed and distance travelled to determine its position at sea. In times past the only way to measure a ship's speed was to throw a wood log into the water and observe how fast it moved away from the ship. In the 16th century, the log was fastened to a rope knotted at set intervals. The log was thrown over the stern (back) of the vessel and a crew member counted the number of knots that were paid out in a set time. From this they could estimate the speed of the vessel through the water. This was known as streaming the log and is also the derivation of the knot as a measurement of nautical speed. In 1878, Thomas Ferdinand Walker (1837–1921), an engineer in Birmingham, patented a mechanical log in which a recording instrument was attached to a rail at the stern of a vessel connected by a long cord with a rotor which was towed behind the ship. The instrument dial recorded the distance travelled. The 'Log' at the Heritage Centre was recovered from a skip in Scarborough and was one of the first artefacts collected by the volunteer group. It is made of brass with a ceramic dial, with the main scale marked from 0 to 100 nautical miles and an inset dial marked from 0 to 10 miles. It has a fixing plate, on which it can turn, with which it would have been attached to the 'taffrail', the rail at the stern of a ship, usually on the starboard side. The Walker’s Excelsior Mark IV instrument was designed for smaller vessels, such as yachts, launches and fishing vessels. Its exact date of manufacture cannot be determined but this design was manufactured in the first half of the 20th century. These mechanical logs have now been superseded by electronic equipment such as GPS navigation instruments.This instrument was made by a significant nautical instrument manufacturer and demonstrates the innovation needed at the time for improved navigation and safety at sea.Timber Box containing an instrument for measuring speed and distance. There is a brass, cased log with a white enamel dial. It also includes a towing cord and cylindrical rotator. The box has paper labelling on the front and also the inside of the lid. The label on the inside of the lid has instructions for use. Although the lid is hinged it has broken off and is separate. The hinges remain attached.Enamel Dial: Walkers Patent Excelsior Yacht Logmaritime, maritime history, tool, navigational tool, navigational instrument, navigation, sailing, walkers, maritime technology, walker & son

Set of destination indicator equipment that was fitted to Z3 and A class trams. Each item consists of various electronic parts contained within a metal case that could have been cabled together. Equipment manufactured by (Carl) C. Brose of Wuppertal Germany and maintained by Font Electronics of Melbourne - some items have the manufacturers details on them along with the details of the maintenance company and serial numbers etc. Photo .1 - shows the set of equipment as placed on display in the training room. .1 - set of two route number boxes, three individual controlled blinds, driven by a motor and control gear. Has a Fluro light fitted internally. See images .2 to .5 .2 - Small side destination indicator, with driven blind, electronic equipment with motor on the underside of the box - for use in Z class trams - see images .6 to .9 .3 - as for .2, but with motor mounted right side, used in A class trams, see images .10 to .12 .4 - set of two control panels with selection equipment for selecting the destination (by number) and route number with indicators and start button - see image .13 to 14 .5 - set of two long main rolls indicators, with control gear and Fluro light internally, driven by an internal electric motor - see images 17 and 18 .6 - set of two linking mechanism for the various boxes with large cables cut off for each of the four tram boxes. Would have been control panel item .4 - see image 15 and 16. See e-mail from Simon dated 17/11/2014. See reg Item 4617 for a small side destination roll.trams, tramways, destination indicators, a class, z3 class, transport equipment

Articles include the production of Christmas cards for purchase, a visit by the Chief Secretary Hon. A. Rylah who advised that the Free Library Scheme was for municipal councils and that instead a State Library Council (which was being formed) would be a better source of relief, offers of help to contact potential overseas suppliers for electronic and braille equipment, the organisation of the Reservoir auxiliary, establishment of a Machines Committee to look at mechanized forms of Braille production and the possibility of entering into talking book production, improvements to heating, cooking and lighting, needing to use discretion when hiring hall due to an unfortunate incident, donations of Perkins Braillers, brailling of Decimal conversion charts, agreement in prinicipal to a National Braille Reference Library in Canberra, and purchase of Perkins and Stainsby Braillers to improve output of Braille books.32 pages of text with drawingsbraille library of victoria, annual report

Seven copies of the Annual report of the MMTB for the years end 1970 to 1976. 3951.1 - "Report and Statement of Accounts for year ended 30 June 1970", No. 51, gloss fawn heavy paper cover with 44 pages, gloss, on inside giving details of the MMTB Board, Officers, Balance Sheet, Statement of operations, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include Doncaster depot, track reconstruction - concrete spreading equipment, Wattle Park and tram wheel grinding equipment. No printer name given. 3951.2 - "Report and Statement of Accounts for year ended 30 June 1971", No. 52, white embossed heavy paper cover with 44 pages, gloss, on inside giving details of the MMTB Board, Officers, Balance Sheet, Statement of operations, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include; prototype tram in St Kilda Rd, the New computer installation, decorated tram - Christmas 1970, Tram Advertising 1971 (briquettes), No printer name given. 3951.3 - "Annual Report 1972" - white gloss heavy paper cover with 44 pages, gloss, on inside giving details of the MMTB Board, Officers, Operations report, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include; school children boarding bus, passengers boarding bus at Shoppingtown, Concreting tracks in Keilor Road, Rail Inspection Unit and Wattle Park. No printer name given. 3951.4 - "Annual Report 1973" - light grey gloss heavy paper cover with 40 pages, gloss, on inside giving details of the MMTB Board, Officers, Operations report, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include; tram 1041, interior and driving cabin of 1041 and fire fighting demonstration at Preston Workshops. No printer name given. 3951.5 - "Annual Report 1974" - light blue gloss heavy paper cover with 40 pages, gloss, on inside giving details of the MMTB Board, Officers, Operations report, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include; Pedestrian Mall, Bourke St, New truck assembly area at Preston Workshops, electronic control equipment for new trams, English language lessons for migrant employees and 1041 turning from Bourke into Spring St. Printed by Sands & McDougall. 3951.6 - "Annual Report 1975" - fawn coloured gloss heavy paper cover with 44 pages, gloss, on inside giving details of the MMTB Board, Officers, Operations report, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include; Z class tram in Nicholson St, National Bus in Doncaster, New passenger shelter in St Kilda Road, new trams at Preston, drivers position of Z class tram, Interior of National Bus, Drivers position in National bus and first cable car in Melbourne after restoration. Printed by Magnum Press. 3951.7 - "Annual Report 1976" - light blue coloured gloss heavy paper cover with 44 pages, gloss, on inside giving details of the MMTB Board, Officers, Operations report, schedule of debenture, investments, Auditors reports, record of Annual traffic receipts, passengers, miles etc, tram and bus routes operated, statistical information, graphs and photographs. Photos include; Z2 in Bourke St, Z24 Victoria Parade, Z17 Nicholson St, overhead trucks, W2 in Mount Alexander Road Nth Essendon, Z28 Nicholson St, W2 226 loading passengers St Georges Rd and Wattle Park. Printed by Magnum Press.3951.1 - has Graeme Breydon's address stamp on front cover., 3951.2 - ditto, 3951.3 - ditto and on inside of front cover., 3951.6 - "G. Breydon" in pencil on front cover and pencil comments on balance sheet., 3951.7 - dittotrams, tramways, mmtb, melbourne, annual reports, operations, trackwork

These scales come from the Nullawarre Post Office. Nullawarre is a small settlement 25 kilometres south east of Warrnambool. The area was settled in the late 1860s and 1870s and the first school was opened in 1878. The main agricultural pursuit in the Nullawarre district is dairying. The Nullawarre Post Office still operates in the General Store building. This set of scales is of interest as it is a memento of the equipment used in country Post Offices one hundred years ago or more. Scales such as these may still be in use but electronically-operated scales are more likely to be used today.This is a set of metal weighing scales with two trays, one oval in shape and one round, on a balancing mechanism. This mechanism has two ornamental upright metal pieces. The scales are affixed to a wooden base in a rectangular shape with the front edge shaped into two curves. The wooden base has three slots for holding the weights. There are six brass weights with this item. The metal is a little tarnished and the wooden base is stained. nullawarre, history of warrnambool

This is a set of 1photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement equipment. They were probably employed in establishing mapping and geodetic control operations or the surveyors may have been in training. The photos were most likely taken in the 1950s and 1960s. Photos .1P to .6P feature personnel setting up geodetic survey chaining equipment to measure distances. The surveyor in Photo .5P is LTCOL Howard Angus Johnson MBE who served from 1936 to 1954. The RA Svy surveyor in photos .7P to .12P were using a theodolite to take angular measurements. They were usually supported by an observer who recording their readings on a booking form. The surveyor in Photo .10P and .11P is LTCOL Jorge Gruszka, who served from 1955 to 1985. He was CO of the Army Survey Regiment from 1982 to 1985. The surveyor in photo .13P is cutting an identification blaze on a tree using a hammer and chisel. The tellurometer in Photos .14P to .16P was a MRA1 microwave Electronic Distance Measuring instrument (EDM) introduced in 1958. It and later models were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. The surveyor with the slouch hat is Colonel James ‘Jim’ Leslie Stedman, who served from 1941 to 1978. He was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment.This is a set of 17 photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) - Photo, black & white, c1950s, unidentified personnel using geodetic survey chaining equipment. .2) to .4) - Photo, black & white, c1950s, geodetic survey chaining equipment. .5) – Photo, black & white, c1950s, Jim Stedman using geodetic survey chaining equipment to measure distances. .6) - Photo, black & white, c1950s, Unidentified personnel geodetic survey chaining equipment. .7) – Photo, black & white, mounted on card, c1950s. Unidentified surveyor undertaking observations on a coral reef using a theodolite. .8) – Photo, black & white, c1950, unidentified surveyor undertaking observations with a Tavistock theodolite. .9) – Photo, black & white, mounted on green card, c1950s. Unidentified surveyor undertaking observations using a plane table. .10) – Photo, black & white, c1955, Jorge Gruszka undertaking observations with a theodolite. 7/55 Basic Survey Course Balcombe. .11) – Photo, black & white, c1950s, Jorge Gruszka undertaking observations with a theodolite. .12) – Photo, black & white, c1946-1948, unidentified surveyor undertaking observations with a theodolite to gain control for the mapping of the Snowy Mountain Diversion Scheme. .13) – Photo, black & white, c1950s, unidentified surveyor cutting a blaze in a tree. .14) and .15) – Photo, black & white, c1960s, Jim Stedman demonstrating EDM equipment. .16) – Photo, black & white, c1960s, L to R: Jim Stedman (probably) and unidentified surveyor demonstrating EDM equipment. .17) – Photo, black & white, 1956, Operation Cutlass - Surveyors SPR W. Crane and J.A. Campbell undertaking observations with a theodolite in extreme conditions..1P on back - First Order Chaining Equipment .2P on back - First Order Chaining Equipment .3P on back - Full catenary 1800 – 1960 replaced by EDM .4P on back - First Order Chaining Equipment .5P on back - H.A. Johnson, Benambra baseline? 1st Order Chaining .6P on back - Chaining .7P on front - Difficult observing conditions especially when the tide is in. The station is sighted (sic) on a coral reef. .8P on back - Tavistock. .10P on back of duplicate in Photo Folder 14 – George (sic) Gruszka 7/55 Basic Survey Course Balcomme (sic) 1955/56 .14P and .15P on back - Jim Stedman demonstrating early EDM equipment.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

These mine detectors were made in the U.S.A. roughly 1967-1973. They were designated as portable transistorized metallic mine detectors.1. Case Aluminum, 2 piece drab olive, 8 strong retaining clips. 2. Detector Assy, and accessories. - Coil head, - Electronics box, - Ear phones and ear plugs, - Spare electronic modules, red, white, black, - Handle - extendable with controls, - cables. Electronics box has metallic label = model P.158. Serial 8407 etc - US Army. Case has transfer type labels: - “Detecting set mine, Portable metallic FSN 6665-966-7071 PO No. 3295” “Polar Industries Inc. Model P-158” Handle base has “8407” in Texta colour and metallic label, case carrying. “MFR name zero MFG 6” Part No. DZ136 - The lid has U.S. Property stamped on it. The NR 8407 is written on it in Texta.vietnam war, mine warfare, engineer mine clearance

An ergonomic keyboard designed for people who need to type with one hand. Typing speeds of 85 WPM are possible with this keyboard. The layout of the keyboard is designed for one handed users to type quickly and efficiently.The shape allows the natural movement of the hand. The company was formed in 1977 and this model was created in 1981. Single handed keyboard with grey and yellow buttons and power cord. Maltronkeyboard, maltron, disability, one handed keyboard, impaired aid, electronic