[CW] Re: [MorseCode] Help answering a question... please

Mon, 10 Nov 2003 14:30:06 -0500

You're saying that there was NO separate dynamotor switch for the police
Motorola 30-D "twin coffin" type radio?

Perhaps this was a way of making the radio easier for those who didn't
understand radio!  But it is different than the majority of sets I've seen.

Perhaps Mr. Caldwell can tell us the type of aircraft radio set used in the
aircraft.

On all the amateur and marine units I've seen, everyone of them had a
separate power switch.  The then had additional PTT switch on the
microphone, and/or were equipped with a key with activated a keying relay to
switch the transmitter into transmit, (which changed the antenna, and muted
the receiver) then the relay would close the key - this provided QSK type
keying - although sometimes there was just a button that had to be pushed,
or a knob to be turned to put the radio into transmit.

,----- Original Message -----
From: "Doug Seneker" <[email protected]>
To: <[email protected]>; "'CW'" <[email protected]>; "'MorseCode'"
<[email protected]>
Cc: <[email protected]>
Sent: Monday, November 10, 2003 11:19 AM
Subject: RE: [MorseCode] Help answering a question... please

> Ref. Earhart sending CW with a mike button;  When I started as a cop in
> the KC area some cars still used the old Motorola 30-D "twin coffin"
> radios with a dynamotor.  To get a message out you had to "press, wait,
> then talk" because they simply wouldn't transmit until the dynamotor
> revved-up.  The first word or two would be lost if you didn't wait.  It
> was a practice to "click" or double-click the mike button as a greeting
> to a buddy, or as an informal comment or acknowledgement of some air
> traffic.  You simply couldn't do the "clicks" if you were stuck with a
> dynamotor unit.  I don't see how one could send CW with the mike button
> unless it was SUPER, SUPER slow, maybe 1 or 2 WPM?   Doug Seneker, n0wan
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Tomas (NW7US)
> Sent: Saturday, November 08, 2003 4:18 AM
> To: CW; MorseCode
> Subject: [MorseCode] Help answering a question... please
>
> Hi,
>
> The following is an e-mail I received from Alan.  I don't have an answer
> for
> him, but I thought if I'd post his question here, we could get an answer
> from
> one of you.  If you have this information, would you please let him (and
> carbon
> me) know?
>
> Thanks!
>
> ------- Start of forwarded message -------
> > From: [email protected]
> > Date: 11/7/03 1:36:38 PM
>
> We are having a lively discussion about what is produced when a mile
> button is
> used to send Morse Code. The radio in question was in Amelia Earhart's
> Lockheed
> Electra 10E on July 2, 1937. She supposedly had left the key behind so
> had to
> use the mike button. The radio is believed to be a Western Electric RA-1
> HF.
> More information may be found on the TIGHAR.com web site but I think I
> have it
> all correct.
>
> The specific question is in regard to the dynamotor churning up each
> time the
> mike button is depressed or if it does. The actual concern is whether
> fairly
> clean dots and dashes could be sent or whether the nature of the radio
> would
> have it difficult to send readable code. would some beginning characters
> be
> lost? Would some dots and dashes be difficult to discern?
>
> Alan L. Caldwell
> Major USAF Ret.
>
> -------- End of forwarded message --------
>
> 73 de Tomas, NW7US (AAR0JA/AAM0EWA)
> --
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>
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