Hah, hah... I imagine it was a real judgement call for the FCC
inspector as to just how thoroughly the lifeboat radio must be tested
while some ancient sparks was grinding away wheezing and sputtering
at the crank...
73,
Drew
AF2Z
On Sat, 14 Apr 2012 19:48:09 -0700, you wrote:
Thanks for
I was one of the techs who demonstrated that gear to Phil's FCC engineers
for their annual SOLAS inspection on the San Francisco Bay. It was a simple
test to ensure the desiccant cartridges were still blue (dry), see that it
made RF and could hear signals on both 600 meters and HF and that the
and
could have been much smaller and lighter for what it was.
73
Sandy W5TVW
-Original Message-
From: Mike Morrow
Sent: Saturday, April 14, 2012 5:56 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Real SOS (OT)
Ron wrote:
By 1980 receivers had grown very selective, but the fact
Ron wrote:
By 1980 receivers had grown very selective, but the fact was that a great
many ships still used a regenerative receiver as the backup in case the
main receiver was out of commission for some reason.
The auto-alarm (AA) receivers were also designed to be broad enough to detect
A2
On 4/13/2012 2:23 PM, Ron D'Eau Claire wrote:
http://mikea.ath.cx/www.n1ea.coastalradio.org.uk/EJM_CD3_Track03_SOS_de_PJTA
.zip
Sounds like the Holy Frequency in the 50's
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org
Ron wrote:
By 1980 receivers had grown very selective, but the fact was that a great
many ships still used a regenerative receiver as the backup in case the
main receiver was out of commission for some reason.
The auto-alarm (AA) receivers were also designed to be broad enough to detect
A2
On 4/13/2012 2:23 PM, Ron D'Eau Claire wrote:
So when an emergency occurred it was
often pandemonium, first until those on the channel realized there was an
emergency, and then QRM from those who could not hear the emergency traffic
while others tell them to QRT.
Happens all the time in the
On 04/13/2012 05:23 PM, Ron D'Eau Claire wrote:
the post-Titanic international distress frequency of 500 kHz was
used for routine messages as well. So when an emergency occurred it was
often pandemonium, first until those on the channel realized there was an
emergency, and then QRM from
On 4/13/2012 6:28 PM, Mike Morrow wrote:
Even the emergency lifeboat transmitters like the SCR-578 and AN/CRT-3 and
commercial equivalents, plus all the larger lifeboat emergency receiver and
transmitters like the RCMA ET-8053 (AN/SRC-6) and the Mackay 401-A (AN/SRC-6A)
sent MCW on 500 kHz.
The discussion of the Titanic's communications and the interference is a
reminder that many Hams have never heard the real thing.
Shipboard transmitters were crystal controlled (after CW become the norm at
sea) and the post-Titanic international distress frequency of 500 kHz was
used for routine
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