- Vintage philco refrigerator h 1131 pro#
- Vintage philco refrigerator h 1131 code#
- Vintage philco refrigerator h 1131 professional#
The seller is “xhcx717″ and is located in Greencastle, Pennsylvania. This item is in the category “Collectibles\Advertising\Merchandise & Memorabilia\Clocks”. Looks beautiful lit up! The item “Vintage PHILCO REFRIGERATORS FREEZER LIGHTED SIGN RARE SUBJECT MATTER! 27X9X3″ is in sale since Tuesday, July 10, 2018. This can be exceeded for a short time, as long as the average is not exceeded over the anode's thermal time constant (typically 0.1 sec).Vintage PHILCO REFRIGERATORS – FREEZER LIGHTED SIGN RARE SUBJECT MATTER! 27X9X3 Overall very clean in excellent condition! Inner tubes light up without issues. A number to indicate the maximum anode dissipation in watts.X – Forced-air cooled (air is blown through cooling fins thermally connected to the anode).W – Water cooled (water is pumped through an outer metal jacket thermically connected to the anode).V – Vapor cooled (anode is immersed in boiling water, and the steam is collected, condensed and recycled).N – External anode, natural convection air cooling.L – External anode, liquid convection cooling.R or a hyphen (" -") – Glass envelope, radiation cooling.Up to 2 letters denoting the construction type and the cooling method:.An initial digit denoting the number of electrodes:.
Vintage philco refrigerator h 1131 code#
Vintage philco refrigerator h 1131 professional#
The first numeric character indicated the filament/heater power rating, the second alphabetic character was a code for the function, and the last 2 digits were sequentially assigned, beginning with 21Ī four-digit system was maintained by JETEC since 1944, then by EIA since 1957 for special industrial, military and professional vacuum and gas-filled tubes, and all sorts of other devices requiring to be sealed off against the external atmosphere. The system was used in 1942–44 and assigned numbers with the base form "1A21", and is therefore also referred to as the "1A21 system". Often designations that differed only in their initial numerals would be identical except for heater characteristics.įor examples see below RMA professional tubes system Lastly, manufacturers may decide to combine two type numbers into a single name, which their one device can replace, such as: 6DX8/ECL84 (6DX8 and ECL84 being identical devices under different naming schemes) or 6BC5/6CE5 (sufficiently identical devices within the RETMA naming system) and even 3A3/3B2, or 6AC5-GT/6AC5-G (where the single type number, 6AC5-GT/6AC5-G, supersedes both the 6AC5-G and the 6AC5-GT).Y – Low loss mica-filled phenolic resin ("Micanol") base for RF use.WA, WB – Improved, backward compatible military/industrial variants.GT/G – Glass bulb, T-9 size interchangeable with G and GT types.A, B, C – Improved backward compatible versions.Suffix letters distinguish revisions or variants:.A single numeral that represents the number of active elements in the tube.One or two letters assigned to the devices in order of development.The first character group is a number representing the heater voltage rounded to the nearest whole number 0 indicates a cold-cathode tube.RETMA is the acronym for the Radio Electronic Television Manufacturers Association formed in 1953 - however the standard itself had already been in use since 1933, when RCA/Cunningham introduced the 1A6, 2A3, 2A5, etc. 15.2 General literature and data sheets.14 Compagnie des Lampes (1921, "French Mazda") and Mazda-Belvu.12.3 Shielded tubes for Majestic radios.12.2 Tubes with indirectly heated cathodes.12.1.7 Directly AC-heated rectifier tubes.12.1 Tubes with directly heated cathodes.12 List of tubes used in 1920s and 1930s radio receivers.11.15 Lettered Loctal tubes used in Philco radios.
Vintage philco refrigerator h 1131 pro#
8 List of Pro Electron professional tubes.
4.2.1 1.25 volt DC filament subminiature tubes.4.1.1 Voltage stabilisers and references.4.1 "0 volt" gas-filled cold cathode tubes.3.6.1 British CV and M8000s naming systems.3.3.4 Tungsram receiving tubes system before 1934.3.2.9 STC/Brimar receiving tubes system.3.2.3 EdiSwan ("British Mazda") systems.3.2.2 Compagnie des Lampes (1888, "Métal") system.3.2.1.5 Phototubes and photomultipliers.