DEFINITION microfarad Posted by: Margaret Rouse WhatIs.com Contributor(s): Kenda, Jack Clements The microfarad (symbolized µF) is a unit of capacitance, equivalent to 0.000001 (10 to the -6th power) farad. The microfarad is a moderate unit of capacitance. In utility alternating-current (AC) and audio-frequency (AF) circuits, capacitors with values on the order of 1 µF or more are common. At radio frequencies (RF), a smaller unit, the picofarad (pF), is often used. This unit is equal to .000000000001 (10^-12) µF. In RF scenarios, capacitances range from about 1 pF to 1,000 pF in tuned circuits, and from about 0.001 µF to 0.1 µF for blocking and bypassing. At audio frequencies (AF), capacitances range from about 0.1 µF to 100 µF. In power-supply filters, capacitances can be as high as 10,000 µF. Capacitor, 1/3 M.F.D. (microfarad) within wooden insulating box. Two terminal posts set in an insulating box. Maker's name and place 1/3 M.F.D No. 34402scientific instrument, capacitor, electrical engineering, laboratory

Five 'Popular Radio Weekly Magazines. .1) Vol. 1, No. 1, 25 February 1925. (Purchasing a receiver, eliminating static, Morse Code, An Efficient one-valver, A Simple Crystal Circuit, Combining Valve and Crystle, the Alfred Hospital, Frank Tate on Radio. Images of Josie Melville, Alberto Zelmanm circuits) .2) Vo. 1, No. 14, 27 May 1925. (Purity amplifier, Popular Wireless, Oscillations, Marconi's Wireless Beam Transmitter, Resistance coupled Amplifiers, Condenser Losses) .3) Vol. 1, No. 2, 04 March 1925. (A Crystal Receiver, Medium Wave Four-Valver, The Harkness Circuit, A One-Valve Super, The Aerial Mast, The Police Patrol, C Batteries, A Two Crysal set, La Bela Lingvo, Plain Aerial. Images - Transmitting Aeroplace, A. Nicholson - Chief Commissioner of Police) .4) Vol. 1, No 15, 03 June 1925. (The Ham and Radiophone, A Good Circuit, How the Microphone Transmitter Works, A Reflex Circuit, A Millionaire's Radio Installation, Teh Deresnadyne, Crystal Detectors, Hints an Accumulators, 3LO, Selection Radio Parts) .5) Vol 1, No. 6, 01 April 1925. (The Renartz Tuner, A 600 foot aerial, Measuring your Receiver, Doctoring Your Set, Understanding What You Read, The Vernier Condenser, Radio and Railways, Who Can Build the Smallest Set.)radio, valve, electrical engineering, frank tate, alberto zelman

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

Wall calendar for 1945. Picture of a shingle roof cottage set in a garden titled amid spring blooms. Under the picture season's greetings from The Northern Radio Service (W. L. Tresidder) radio and electrical service specialists, 333 Hargreaves Street, Bendigobusiness, retail, northern radio service

Olive drab metal case. Lunch box size. Contains ear piece on spiral cord and a bakelite morse code key. Lid lists antenna length and frequency channels. Base has switches, dials and battery.radio set an prc, sas

Document. Invoice to Mrs. Guiney from Webster's Ironmongers/Licensed Radio Dealers, 291-293 Williamson St. Bendigo. Invoice dated May 1 1939, for a tea set for 9/6.document, memo, invoice

Framed poster advertising Veterans corner radio Program. Photo depicts four Apache helicopters flying line as team as the sun sets. Nams of production crew is also depicted. Poster is signed by EWE H-Smith CO 7 RAR 1965-68.poster, 7 rar, apache (attack helicopter)

Green radio handpiece that plugs into the battery pack. Black rubber coil with screw in attachment on top. Hand set has black connection to press button to communicate.radio handpiece

Colour acrylic or oil painting of a signals radio room. The painting depicts an operator facing the artist whilst tuning in a frequency.The operator is in a Green uniform with two bars and two chevrons on his sleeve is a Raeme Lad - Ziggy. The painting is set in an ornate Gold frame.Donated to the N.V.V.M. Phillip Island. In memorry of Dr. Zygmunt A Gizyckide Gozdawa. MDDS ( Poznan - Poland B.D Sc (Melb) L.D.S. (Vic) By Gizycki De Gozdawa Family Heritage Foundation Ziggy @ Raeme Lad Radio Wksp. 7 BN RAR 1st Tour NUI DAT.1967.painting, signals, gizycki

Part of a series of prison broadcast productions delivered by 3CR. Includes interviews, songs, poems and messages from Indigenous inmates, and also features Kutcha Edwards. Meg Butler (technical producer)2 CD setwurundjeri, kulin, social justice, prison system, rehabilitation, dame phyllis frost centre, port phillip prison, fulham correctional centre, barwon prison, loddon prison, marngoneet correctional centre

Developed in the Research and Development Department of VISY Board by Alex Ong and Richard Pratt, this manufactured version of 'making do' philosophy began with a humanitarian outlook. Less than 100 were made in the pilot program and these were distributed to the homeless through welfare agencies around Melbourne. They were designed to provide some protection from the weather and to be portable and disposable. Unfortunately, the project was short lived, as some safety issues were unable to be resolved: ie, someone inside the bag would not be able to escape should the bag be set alight. It was found that people sleeping on the streets preferred sheets of cardboard or paper to avoid this possibility. Lois Densham heard a story on the radio about these sleeping bags and contacted VISY to see if she could acquire one for the Running Stitch collection. She approached the Collingwood office and it is now believed to be one of the last remaining items from this program.Recycled paper sleeping bag made from brown paper and sealed at the 'mouth' with paper tape (masking tape). Approximately six feet long, it would accommodate an adult.visy board running stitch group, running stitch collection, homeless, sleeping bag, pilot program, richard pratt

Inductance coil for a crystal set. Cross wound to minimize capacitance between normally wound adjacent turns.communication, radio

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Used in Centurian Tanks in Vietnamequipment/gear, ballarat rsl, ballarat

The 8th/13th Victorian Mounted Rifles was raised as a regiment of the Royal Australian Armoured Corps on 1 May 1948 with Headquarters in Melbourne and squadrons in Sale, Benalla/Wangaratta and Albury. In 1955 Regimental Headquarters moved to Wangaratta and a second squadron was located at Albury. The Sale squadron transferred to 4th/19th Prince of Wales’s Light Horse. In 1977 8/13 VMR Regiment was reduced to an independent squadron A Squadron 8th/13th Victorian Mounted Rifles and in 1991 was linked with 4th/19th Prince of Wales’s Light Horse forming the VMR Squadron of that regiment.Unique collection of photographs showing the first years of an armoured regiment of the post-Second World War era Citizen Military Forces showing equipment, uniforms, training and social activity and some personalities.Black and white photograph of four soldiers in variety of uniforms standing beside civilian utility vehicle. One is wearing winter service dress, one in khaki drill uniform, two are wearing V neck Army jumpers. One is wearing headphones, one haslength of radio aerial. One of a collection of photographs of 8th/13th Victorian Mounted Rifles Regiment between 1948 and 1951." Cunningham Alternative Command Vehicle. No. 1 Set Training. John Neale, George Atkinson, Bill Purcell, Ron Braddy. "