In late-1931, National Company was selected by the Department of Commerce (who was in charge of airports and airways through the Aeronautical Branch) to build new superheterodyne receivers to replace the old regenerative receivers then being used at airports around the country.The entire system upgrade of airport communications equipment included General Electric, who got the contract for the new transmitters and Aircraft Radio Corporation, who got the contract for the new airborne gear.The details vary markedly between the services, though, so be sure to get the right information for your branch.There are a few things to keep in mind: any court order or legal agreement will override the services guidelines.Each receiver was hand tested and aligned by engineers at National resulting in a very modern receiver that provided excellent sensitivity and selectivity (along with top-notch image rejection due to its TRF amplifier stage.Frequency coverage of the RHM is 2.3mc up to 15.0mc using a set of 15 coils.National got the contract for the ground-based airport receivers. and his West Coast design team were involved in some of the electronic engineering work of the new receiver that was designated RHM.The RHM was National's first superhet and it had some of the features that were to become National's trade-mark.
We are continually striving to produce and procure the most authentic, detailed and high quality products available for sale.
The good news is that there isn’t a lot of guesswork involved: every service has some sort of regulation that addresses this issue.
In general, service members are required to provide some support to their family.
Western Front, Germany The US First Army begins its drive to the Rhine River, spearheaded by the VII Corps.
Pacific, Philippines A Regiment of the US 41 World War II, 1945 Western Front, Germany The US First and Ninth Armies launch Operation Grenade, the crossing of the Roer River, and head to the Rhine.