[CW] FCC MM Rule Making 13-249 AM Broadcast

[D.J.J. Ring, Jr. via CW]

I was speaking on both modulated and keyed A2 modulated continuous wave.  I
do not know if the keyed variety would blank the receiver.

The modulated and not keyed carrier type was and is used for non
directional beacons (NDB) heard from 300 to 400 kHz.

A4941 was what you received for your Short Wave Listener (SWL) receiver
tax, remember?  None of that over here.

UK amateurs can use A2 on HF, Canadians cam, we cannot.

73

David
On Jan 5, 2015 3:38 PM, <bcarling at cfl.rr.com> wrote:

> Thanks Richard,
>
> Well this may sound odd but I distinctly remember hearing quite a bit of
> MCW on the HF
> bandds in the 1960s and early 1970s. I think perhaps even hams were using
> it. I loved how it
> would BLANK the receiver and you could listen to CW with zero noise. Maybe
> it was all while
> I lived in England growing up though...
>
> Some of my listening was done in those early days in the Cambridge area,
> using a fine
> Hallicrafters S39 and also with a nice old R1155A receiver.
>
> Both worked exceedingly well for this young SWL designated as "A4941" by
> the RSGB which
> expertly administered the registration of all SWLs back then!
>
>
> On 5 Jan 2015 at 10:52, Richard Knoppow wrote:
>
> > ----- Original Message -----
> > From: "Brian Carling via CW" <cw at mailman.qth.net>
> > To: "D.J.J. Ring, Jr." <n1ea at arrl.net>; "CW Reflector"
> > <cw at mailman.qth.net>
> > Sent: Sunday, January 04, 2015 7:27 PM
> > Subject: Re: [CW] FCC MM Rule Making 13-249 AM Broadcast
> >
> >
> > I MISS hearing MCW!!
> >
> > Best regards - Brian Carling
> > AF4K Crystals Co.
> > 117 Sterling Pine St.
> > Sanford, FL 32773
> >
> > Tel: +USA 321-262-5471
> >
> >     I occasionally hear "spy" stations sending MCW. Not
> > messages of course, just code groups. MCW for general
> > communication was banned long ago but was still used for
> > distress traffic on 500 Khz.  The RCA station in Los
> > Angeles, KSE used to run MCW on its 500 Khz announcements. I
> > don't know what they used but they would come on in plain CW
> > and the modulation would come up gradually as thought a tube
> > heater was started.  I never heard MCW anywhere else but, of
> > course, I didn't hear that many LF stations with my
> > makeshift regenerator.
> >     I used to hear some perfectly awful signals from ships,
> > probably fishing boats, rough, youping stuff. I have no idea
> > what sort of equipment they had.
> >
> >
> > --
> > Richard Knoppow
> > Los Angeles
> > WB6KBL
> > dickburk at ix.netcom.com
> >
> >
> > --
> > Richard Knoppow
> > Los Angeles
> > WB6KBL
> > dickburk at ix.netcom.com
> >
>
>
>
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