00825cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035002000092040004500112050002200157110004100179245010400220246003200324260004300356300003800399490004000437500009000477650001100567999001700578war22000071 DLC20260227112812.0960530s1922    dcuaf        f000 0 eng c  awar22000071   a(OCoLC)34830249  aLibrary, U.S. Army War CollegecMoUdDLC00aTK5707b.U6 no. 91 aUnited States.bArmy.bSignal Corps.10aAmplifiers and heterodynes ...cPrepared in the Office of the chief signal officer, December, 1921.30aHeterodynes, Amplifiers and  aWashington,bGovt. Print. Off.,c1922.  av, 38 p.bplates, diagrs.c23 cm.0 aRadio communication pamphletvno. 9  aOn verso of t.-p.: War department. Document no. 1092. Office of the Adjutant General. 0aRadio.  c92384d92384