. QST . eption down to 50 meters. See page 5,February 1920. However, these receivers were rarities. The Grebe type AGP 101 Short-Wave Regenerative,first advertised in QST on the inside front cover of theSeptember (1916) issue, was supposed to tune down as lowas 150 meters. I suspect this was to allow easy tuning-inof a 200-meter signal. The Grebe CR-5, CR-8, and CR-9 receivers, as adver-tised in the fall of 1921, had a bottom tuning range of 74, September 1921; 78, October 1921; 71, September1921; and 97, October 1921 — all in Volume V. At 21, Marcli 1921 (Volume IV), the Clapp-Eastham
. QST . eption down to 50 meters. See page 5,February 1920. However, these receivers were rarities. The Grebe type AGP 101 Short-Wave Regenerative,first advertised in QST on the inside front cover of theSeptember (1916) issue, was supposed to tune down as lowas 150 meters. I suspect this was to allow easy tuning-inof a 200-meter signal. The Grebe CR-5, CR-8, and CR-9 receivers, as adver-tised in the fall of 1921, had a bottom tuning range of 74, September 1921; 78, October 1921; 71, September1921; and 97, October 1921 — all in Volume V. At 21, Marcli 1921 (Volume IV), the Clapp-Eastham 45 route of navigation is restricted to a wavelength of50 meters for transmission. Up to 25 miles distancethe wavelength is 100 meters; seventy-five miles,150 meters. The power input at the transformerterminals is limited to J^ kw. . , Later, some relaxation was allowed:On December 30, 1919, the Department of theNaval Service, at Ottawa, authorized all Ca-nadian amateurs on the Great Lakes and River. St. Lawrence, from Port Arthur, Ontario, toQuebec, P. Q., to use a transmitting wavelength of200 meters until the reopening of navigation,approximate^ the 15th of April, 1920. Thisconcession was stated (in the Order itself) to bein the nature of an experiment; and the De-partment further announced that if no inter-ference resulted, it was prepared to consider apermanent amendment to the regulations re-garding wavelengths. -^ The incjuiry, re experiences on short waves, wasas follows: In an editorial called Greetings, CanadiansII-^ditoi- \\arner announced that the Leagues Oper-ating Dei^artment had been expanded to includeCanadian Amateur Divisions. Then he said (at15, January 1920): . . Cant we be of assistance in working out yourtechnical problems? You are invited to make use ofQST for this purpose. Relay transmission on 50meters is an entirely new field to most of us, but weare sure it can be done. QST will welcome discussionsand articles on this topic. For best results, shoul
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
