#Radio transistor 1952 portable#

Radio, Mullard circa 1952, no.59432, light blue case and knobs with white trim, red Philips Model 135B label to back 21 cm high x 26 cm wide x 18. Vintage Philips radio Scarce Philips Bakelite Radio from 1930.

#Radio transistor 1952 portable#

They start with F or FL (or sometimes FZ for larger consoles). Vintage Phillips (made in Holland) portable radio together with Ballantynes Scotch Whiskey transistor radio Retro Philips Radio. From about 1959 onwards the codes were much more like their Philips counterparts. Early Fleetwood codes were numeric with F on the end. For example, the F元74T transistor radio is a rearrangement of the Philips model 元Z74T. The first radio to be produced commercially was the Regency TR-1, which was also manufactured in America and went on sale in. Transistors were first produced commercially by the American company Raytheon, in 1952. The 2 appears to just be an identifier (most likely in case there were two models in 1945 with 5 valves, which there was - the 515 is the small 'Meteor' mantle set).įleetwood codes are often just a rearranged version of the Philips code. In 1956 Walter Brattain, John Bardeen and William Shockley shared the Nobel prize for physics for their invention of the transistor. For example, the model 525 is a 5-valve 1945 design. Mullard codes: The model codes from Mullard sets (unlike their Philips counterparts) appear to contain valve count and date information. Philips model codes are complex - they are explained in-depth on the Philips brand page. U suffix model numbers are transformerless (hot chassis) sets and great care should be taken, or the sets avoided altogether. They used time-in-motion studies to find the most cost effective way to asemble sets and sometimes this means repairs can be nightmarish (if you've ever worked on a V7A Theaterette this will be all too aparent). Construction is often overly complex but very well engineered - although repairs can also take a complex path. Philips early-mid century were probably the Google of their time - they had branches in many countries and a global brand that everyone knew - and were apparently happy to let engineers come up with new ideas and implement them. General Construction Notes for Philips Electrical Industries of N.Z.