OUR WIRELESS STATION'S ACTIVITIES 



Antarctic by a Mr. Hansen and relayed to us by 

 our operator Hansen in Greenland. 



Our Greenland station employed a 250 watt 

 transmitting tube supplied with 2000 volts of D. C. 

 current for plate excitation and 16 volts D. C. for 

 filament excitation. The power was supplied by 

 an electrically driven motor generator which in 

 turn derived its power from three large "ironclad" 

 storage batteries. The mast was of bamboo in five 

 seven-foot sections joined by ferrules. This mast 

 weighed about 25 pounds and was easily trans- 

 ported by one man. In service at Mount Evans 

 it withstood wind at ninety miles per hour before 

 collapsing, and after repairs was competent to 

 withstand wind of only seventy-five miles per hour. 

 The motor-generator was housed under a bench 

 which served for seats in the main room of the hut. 



Communications with Europe and with the 

 American stations generally was during the first 

 year on 45 meters, though later changed to 34.5 

 meters. 



The above description refers to the operation 

 during the first year, 1927-28. The Third Expedi- 

 tion took in a new motor and transformer, so as to 

 change from direct to alternating current and 

 greatly strengthen the transmission. Mr. Fran- 

 cis M. Baer, who had gone in with the Third Ex- 



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