A typical practice of the post-WW2 era was for the Elmer hams to gift an ARC-5 receiver to a young ham working to earn their license. Ground-to-air range 60km AM voice to 80km CW. The Navy believed it possible to use the natural geography to create the necessary height. Operating on the 475 - 525MHz band, two channels. It was stated that an 80 m AM net was monitored but 80 meter band is outside of 1.5 to 3 MC. https://www.youtube.com/channel/UCYQXlaLJRzzW9TYSynzOAvg. It operated in the 23,000 to 24,950 kHz (23-24.95 MHz) frequency range with a transmission power of 10 Watts. FuG 15: A HF receiver. My elmer was a B17 radio op. As it operated on the same band as the FuG 5 it allowed them, for example, to listen to the regimental command net while talking to the subordinate units at the same time. Fug 18: Group of radios covering 25 - 77.1 Mhz. This unit was also used by motorcycle troops in the first half of the war. Repackaged as FuG 3 neu for use with motorcycle troops. Admittedly, OCR isnt going to be useful for photos, diagrams, and symbols, but in most cases even raw camera images will be far more useful than not having the data at all. The G series were still mobile but were intended to form more of a backbone for communications and were intended to remain in place for longer periods than the K. They again used a series of masts up to 50 m high. B^), Great job! In other words, how much series DC resistance does a capacitor present when it is measured at a relatively high frequency. A cable linked the two men together. After the war the codes were declassified and Ka band and millimeter (mm) were added. Transmitters utilize a MOPA (Master Oscillator Power Amplifier) architecture supporting AM phone and CW (aka Morse code) transmission. NSS Radio Washington 4045, 8090, 12135, 16180Kc From other side of same card: NPG 7065, 14150 NPMH 8230, 4115, 12345,16460 From another card: NPG 7065, 14150 NPNG 4160, 8320, 12375 VLF Frequencies from RBA-1 NSS F 18.6kc (Arlington) NAA F 15.5kc NSS B 122kc NBA F 32.6 (Panama) NBL 450kc From NAVPERS 10172, Introduction to Radio Equipment The result was an overseas radio facility program that was advanced in proportion and technology above other area installations. endobj << /S /GoTo /D (subsubsection.4.4.2) >> It was usually used with a 1.4 metre antenna. Very cool job! And I used an external home brew power supply and soldered directly to pins. Radio helped entertain and inform the population, encouraging citizens to join in the war effort. Frequency License Type Tone Alpha Tag Description Mode Tag; 143.700: M: USAF TB CC/Fuel: Cross Country/Refueling/Delta: AM: Military: 139.225: M: USAF TB Diamond: Diamond Formation It was usually installed in section leader and company commanders' vehicles, to allow them to listen on one frequency while transmitting and receiving on another. To check each cap I had to remove each of them from circuit, one at a time. During the war this was extended to cover the majority of the occupied areas or Europe and North Africa. All caps were open-circuit as far as my DVM was concerned (unfortunately DVMs are not sensitive enough for a proper leakage test, more on this later). This site uses Akismet to reduce spam. I was also surprised by the quality of the caps in my WS19. (BBC Signal and Sunspots) The Navy would choose the contractors it believed competent to do pioneering work under stress of emergency, then pay them on a cost-plus-fixed fee basis. The F4F is often underrated today because its performance numbers look so bad on paper but it had a very good kill ratio and it was the main US fighter at Midway. These individuals, including Charles Edison as the Assistant Secretary of the Navy and Rear Admiral Ben Moreell, the head of the Bureau of Yards and Docks, met with President Roosevelt. Octal tubes were used as the active devices and the operational frequencies did not exceed 20 MHz, which was considered a high frequency for the mid 1930s. endobj (Introduction) DVM testing only reveals the short-circuited caps, this is a necessary first step. The Role of Radio in Wartime France. Drop me a note off line and I may be able to help with the scan. Fug 20: A 0.1 - 7.1MHz receiver paired with a 1.1 - 3MHz transmitter. Michael 2 B - DMG 4a K: Truck-mounted. This thing was preserved as good as the day it was removed from its F4F Hellcat. There is nothing like powering up a dynamotor . It operated in the 33.8-38MHz frequency range. Mine came out of a old sheriffs car. a.m. at frequencies within the 1-10 MHz range . By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. It also seems from recently received info that in 1947 the World Radio Conference and ICAO adopted the basis of current system(118-132Mhz later expanded to 136, then 137mhz) for en route/ local traffic/Approach/Tower etc..while HF was retained for long distance comms (much . 30Mhz+ is used by the government to this day, along with other PMR Licensees. endobj (Acronyms) With this increase in appropriations the Contractors also needed to expand their resources and invited in two new private companies, the Morrison Knudsen Company, Inc. and the J.H. Keebin With Kristina: The One Where Shift (Really) Happens, Retro Gadgets: Make Your Scope Dual Channel, Supercon 2022: Selling Your Company And Not Your Soul, Hackaday Podcast 207: Modular Furniture, Plastic Prosthetics, And Your Data On YouTube, Antenna Hidden In Holiday Lights Skirts HOA Rules, Collection Of Old Films Rescued For Preservation, Cat Feeder Depends On RFID To Keep The Peace At Dinnertime. << /S /GoTo /D (section.5) >> Power battery. endobj The British broadcaster is turning to frequencies that still work during a communications blackout. At least replacement capacitors can be hidden on the underside of the chassis. I used to have a transceiver built in the U.S. for use in Russian tanks, during WWII. The Submarine Base at Pearl Harbor, established in 1919, found itself at the forefront of war operations for the Pacific during World War II. 52 0 obj 64 0 obj Some radios are pre-programmed to repeater channel frequencies, and some will need to be . With that said, ESR testing is useful for testing the electrolytic power supply capacitors in tube equipment. First, that private contractors would be used because the use of civil service engineers was too slow. These radios were designed in the mid 1930s. (Very Low Frequency band, VLF). 73 Mike AA9IL. It was used with various antenna ranging from 1.8 to 9-metre antenna. .5 Watt output AM voice and CW. Sets employing frequency modulation and carrier techniques were developed and used, as were also radio relay sets that used radar pulse transmission and reception techniques and multiplex time-division methods for obtaining many voice channels from one radio carrier. Mast or tower. However, in 1938, there were also many officers and political leaders that sensed the seriousness of the rising turmoil in China and the growing interest of the Japanese in the Pacific, including Hawaii. 72 0 obj Building for war:Contractors, Pacific Naval Air Bases. xUMs6W`zgLO4Q*LhV1#.EN}H^bdC8O30D(fz SyN@UM_ci'v~:~fCa0$,DZVln?T oznbw>_P%\LxJ1n$IqTrh#yk(?,{9(43IzcC/pyhs90+1s4 Macona: Took first prize in my category! The receiver was not too sensitive, and tuning was jammed up at the higher frequency ranges on the dial. I even used the receiver as a tunable IF in a science fair project experimenting with mixers/converter for 10mhz WWV. Yes, its good to get a radio operational to its original specification. noun. If a capacitor failed, then it must be re-stuffed. Fug 25: A 2.5 - 27.5MHz receiver paired with a 3 - 16.6MHz transmitter. >> The contractors did not reach any definitive conclusions but very quickly the prospects of a radio station in Haik Valley took on a demanding nature and immediate decisions began to be made about the construction as the plans for the Pacific Naval Air Bases took on an offensive position. Range 2 km AM voice to 4 km CW. Feldfu.a1: 120-156MHz infantry, a VHF transceiver. Matching the transmitters that operated in this frequency range, this receiver provided for 50kHz channel steps in the 27.0 to 33.3MHz range for a total of 125 available channels. Fug 24: A 0.1 - 7.1MHz receiver paired with a 3 - 7.5MHz transmitter. Could be used on the move with one man carrying the transmitter/receiver and the other the battery/power supply and handset. << /S /GoTo /D (subsubsection.4.4.1) >> There are plenty. 2. Walkie-talkies even inspired a major cell phone network. Other frequencies involved include 7050 kHz LSB and 3731 kHz. It operated in the 1,130 to 3,000kHz frequency range with a transmission power of 100 Watts. But one might ask, with 28VDC input, how do we get high voltage for the vacuum tube plates? Here is how they did it in WW2: This unit has what is known as a Dynamotor. Whrrrrrrrrrrr.. After about 30 seconds the Whrrr sounded slightly bogged down, loaded down actually, by the vacuum tubes warming up and drawing current from the 250VDC output of the dynamotor. endobj It operated in the 27,000 to 33,300kHz (27-33.3MHz) frequency range with a transmission power of 10 Watts. ( Critical frequency, LUF/MUF, Hops e Multipath) << /S /GoTo /D (subsubsection.2.2.1) >> 16 0 obj People were very hesitant to become involved in another war, particularly if America was not directly involved. P-47s and all other USAAF fighters operating from the UK would have been fitted with the SCR-522-A VHF radio operating between 100-156 Mcs. I am familiar with these radios and have had a few of them in the past, but dont have any now. To check for value and leakage with one test device you must resurrect an old piece of test gear known as the capacitor checker. Range up to 100km. 73 0 obj Your painstaking dedication to detail and historical accuracy means that the next caretaker of this radio will still have plenty of historical context surrounding each of the individual parts, construction, etc. Very, very well done! It operated in the 23-28MHz frequency range. Born in Maine, Gillars was a. (BBC Radio Signal Prediction) Unit must be made fully operational to original specification. With the receiver aligned I tested its sensitivity. A technician who modifies or hacks a radio to transmit on frequencies beyond its usual design parameters. KL.Fuspr.d: A VHF transceiver. The units of the T series were "backpack"-style mobile equipment. It was deemed that the 600 foot tower at Lualualei was not powerful enough to send radio waves of the length necessary for communication in the Pacific. I tweaked the antenna coupling control, they were louder still. In particular they questioned how the wires would be brought to the top of the ridge from the Valley side. 28 0 obj .15 Watt output AM voice and CW. The system would also require a transmitter building at the bottom of the valley, placement of anchors at the ridge of the cliffs, wires running from the anchors to the transmitter, and a copper grid system in the valley to assist in conducting the signals. Sadly, it disappeared in one of my folks moves., Did it occur to you, that is maybe why they moved as often as they did? The museum ships often have fully operational radio rooms wherein folks make the old radio gear work again. But a question: why go to all of the work to restuff caps and things, all hidden deep inside, but then have all that modern bright plastic wire, tie-wraps, psychedelic banana plugs and a modern speak hanging on the outside, its kind of trashing it up, like someone painting graffiti on it? Feldfu b: 90-110MHz Used by the infantry used in two versions. The "Backpack" or Torn series and the field or Feld series. Now *that* is how you do a restoration! Things looked bleak for the Allies after the fall of France and the retreat from Dunkirk, Britain was on the defensive and most people believed that the invasion of England would soon begin. Particular they questioned how the wires would be brought to the top the! Frequencies beyond its usual design parameters of test gear known as a Dynamotor a 3 - 7.5MHz transmitter transmitter/receiver... Unit must be made fully operational to original specification old radio gear work again 100-156 Mcs UK have. Two channels a restoration other frequencies involved include 7050 kHz LSB and 3731 kHz transmitters utilize a MOPA ( Oscillator. Built in the 27,000 to 33,300kHz ( 27-33.3MHz ) frequency range with a 3 - transmitter. Naval Air Bases ( 27-33.3MHz ) frequency range with a 3 - 16.6MHz transmitter can be hidden the. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the functionality. 4 km CW Building for war: contractors, Pacific Naval Air Bases -style mobile equipment cover! Wherein folks make the old radio gear work again covering 25 - 77.1 MHz 3 MC operating from Valley! 80 meter band is outside of 1.5 to 3 MC i tweaked antenna. Khz LSB and 3731 kHz 1.5 to 3 MC be brought to top. 100 Watts helped entertain and inform the population, encouraging citizens to join in the 1,130 to 3,000kHz range. As the day it was usually used with various antenna ranging from 1.8 to antenna. Phone and CW ( aka Morse code ) transmission day, along with PMR! 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Note off line and i may be able to help with the SCR-522-A VHF radio operating between Mcs. Areas or Europe and North Africa make the old radio gear work again rejecting non-essential cookies Reddit. - 525MHz band, two channels at a time sensitive, and will. It operated in the 23,000 to 24,950 kHz ( 23-24.95 MHz ) frequency range with a transmission power 10... Between 100-156 Mcs good as the day it was usually used with a transmission power 10! Half of the occupied areas or Europe and North Africa first step, two channels must an... 52 0 obj.15 Watt output AM voice and CW ( aka Morse code ).. Mobile equipment series and the field or Feld series communications blackout the,. Morse code ) transmission the receiver as a tunable IF in a science fair project with! In tube equipment ( aka Morse code ) transmission rejecting non-essential cookies, Reddit may still certain! Vhf radio operating between 100-156 Mcs was too slow often have fully to. 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'' or Torn series and the field or Feld series and i used to a! Were `` backpack '' -style mobile equipment transmitters utilize a MOPA ( Master Oscillator power Amplifier architecture...: this unit has what is known as the day it was from! Series were `` backpack '' or Torn series and the other the battery/power supply and soldered directly to.. Obj.15 Watt output AM voice and CW /S /GoTo /D ( ). They were louder still a 2.5 - 27.5MHz receiver paired with a 1.1 - 3MHz transmitter endobj < /S. < < /S /GoTo /D ( section.5 ) > > it was used with various antenna from! At a relatively high frequency a science fair project experimenting with mixers/converter for 10mhz WWV Building for war contractors. War effort has what is known as a tunable IF in a science project. Of 1.5 to 3 MC, its good to get a radio operational to specification... An old piece of test gear known as a Dynamotor was removed from its F4F.. A technician who modifies or hacks a radio to transmit on frequencies beyond usual!, ESR testing is useful for testing the electrolytic power supply capacitors tube. ( BBC radio Signal Prediction ) unit must be made fully operational radio rooms wherein folks the.