55 



would not be of any value after a certain stated time. It assured 

 the personnel at Bar Harbor two opportunities for reception and 

 practically guaranteed the transmission of the messages; but it greatly 

 inconvenienced the patrol vessel off duty and caused considerable 

 radio interference to the receivers in the vicinity of the dockyard at 

 Halifax. The vessels were granted permission to use the transmitters 

 between certain stated hours, which periods were often greatly ex- 

 ceeded on account of the stress of business due to the inability of 

 NBD (Bar Harbor) to receive the messages, or perhaps to the in- 

 ability of the transmitting vessel to receive the check from Bar 

 Harbor with its low power. The station at Bar Harbor maintained 

 a perfect schedule as far as could be observed, and the ice-patrol 

 vessels deeply appreciated the excellent cooperation given the patrol 

 by the radio stations in the first naval district. 



The following objections are interposed to the method of relaying 

 messages via the patrol vessel in Halifax: 



1. Errors were introduced due to the repetition of messages. 



2. It cut down the time for repairs while the vessel was in port on account of 

 having to use the exciter. 



3. It required an extra watch in port. 



4. The arrangement was unnecessary from the viewpoint of the patrol vessel 

 because of the high class of equipment. The transmitters are fully capable of 

 handling the regular schedule from 1,000 to 1,400 miles with any efficient station. 



5. It was an imposition on the Canadian stations. 



6. It caused interference to receiving stations close by the Halifax dockyard, 

 where the relay ship is moored. 



7. It added extra responsibility to the patrol vessel. 



It is estimated that approximately 175,000 words were sent and 

 received during the cruise, and the transmitters were in constant 

 operation about 78 per cent of the total time of the cruise. 



Excellent results were obtained with the 50-watt tube transmitter 

 during this cruise. A fairly consistent schedule was kept with NCG 

 (Coast Guard radio station, Rockaway Point, Long Island) . Nightly 

 schedules with IBQQ at Mansfield, Mass., were maintained, and 

 approximately 60 messages were handled through this station. A 

 schedule was also kept with 2TR (Newark, N. J.), 10 messages being 

 handled through this station, and with NAD (Boston Navy Yard) 

 on 80 meters. The Tampa heard NAD on the Reinarts receiver 

 but, apparently, NAD did not hear the Tampa. 



The following are registered on the meters on the transmitter 

 working on 143 meters, ICW. : 



Antenna current amperes. - 3 



Primary current do 8 



Filament current do 3. 2 



Oscillator grid current milliamperes.. 20 



Modulator plate current do 100 



Oscillator plate current do 140 



Plate voltage volts-_ 780 



