Anecdotes Of Professional CW (Morse) On U.S. Merchant Marine Ships By Alex Hernandez NU1T/AAV4GP. Anecdotes Of Professional CW On Ships And Army Mars Introduction.
The latter model ship stations had a Mackay
MRU-35A CW/SSB/SITOR HF synthesized transmitter
And at least one 3020A/3030A synthesized VLF/MFHF receiver covering
15 kHz to 29.9999 MHz
This is a typical radio/officer’s berth (this one belonged
To a captain, left and radio officer, right):
M/V President Adams, C-10 Class Container Vessel, Call Sign: WRYW
S/T American Osprey
As part of the Warren Commission Report of 1964, this popped-up
Regarding the Leslie Lykes and Lee Harvey Oswald:
Manufactured by Federal Telephone and Radio Corp. VLF regenerative receiver used in the merchant marine and the U.S. Coastguard, vintage WWII. Coverage is 15 to 650 KHz in four bands. Can be operated from 120 volts AC or DC or directly from 6 volts DC and a 90 volt "B" battery. I'm told the Coast Guard also designated the 128-AY version made by Federal as the RC-123. A good portion of the Liberty ships built from September 1941 to 1945 used a Federal Mackay console which included one or more variations of these receivers. Like most marine receivers of the period, the AC-DC design was not to save money but stemmed from the use of 120 volts DC on many ships and the ability to use the batteries for backup power source.
“from Alex NU1T/MREO” ( from http://oak.cats.ohiou.edu/~postr/bapix/Mackay.htm):
"I also used the Mackay Radio And Telegraph Type 128 HW well into 1994/95, when I served as MREO onboard the SS Leslie Lykes." This receiver was used to copy the last SOS from the SS Achille Lauro." Alex sent copies of the DDD SOS that he received in November 1994 from the Achille Lauro on 500 kHz while serving as Master Radio Electronics Officer (ARA) onboard the Leslie Lykes, callsign WHTU. According to Alex, the exact QTH for his ship was around 900 miles southeast of the disaster site. He adds,"Unfortunately, we were too far to be of any useful assistance, as deemed by the OM." (I wrote this article for the Boat Anchors Website about 5 years ago).
This was the receiver used, as late as 1994/1995 during my voyage on WHTU
To mount the 500 kHz watches and where I copied to SOS from the Achille Lauro, IBHE
On November 30, 1994, the following dramatic SOS relay (DDD) QTC’s were copied while I was on watch that afternoon monitoring 500 kHz:
The SOS was actually sent using the reserve 40 Watt CW transmitter
On 500 kHz due to failure of the INMARSAT terminal because of fire
Damaging electrical cables, as described in the Radiograms!