Linux-Hams archive - April 1998: Re: Announcement: TCP/IP over Morse driver released

Re: Announcement: TCP/IP over Morse driver released

Kai Schulte (terhi.victor@logonet.com)
Wed, 1 Apr 1998 00:52:33 +0200 (MESZ)


Steve Fraser wrote:

> TOMC sends binary-encoded-morse (BEM) to and from a serial port of a
> computer. In hardware terms, the DTR line is toggled to key the transmitter
> (via a very simple circuit - a resistor connected to the base of a power
> switching transistor, which keys the rig in CW mode),

Great idea.

> and the CTS line is
> fed with from a hard-limiting op-amp which is in turn fed from the rig's
> speaker for receiving). This is very similar to the "Hamcomm" and similar
> devices.

Hmm, I'm afraid you'll have to develop a better receiver. This one is
never going to outperform the afsk modes in noisy conditions ;)

> In terms of software, each binary bit is encoded as the repective morse code
> for a zero or one respectively - although a "fast" mode is possible whereby
> zeros are send as "E" and ones are sent as "I". CW users will recognise this
> as one or two dits respectively.

That's what I call an excellent encoding algorithm.

How about adding sound card support? That way, we could also do
voice encoding. People with non-cw licences could have the sound
card recite the words 'zero' and 'one'. (Using samples spoken by
the station operator would help restore the personal touch that some
hams are missing in the digital modes.)

> ftp 127.0.0.1
> (log in as anonymous)
> cd /tmp

Hmm, none of my favourite 127.0.0.1 ftp mirrors seems to have a
/home/ftp/tmp directory... I guess I'll have to contact the maintainer.
I hope he has the time to create one. (Right now he seems to be writing
a message to a mailing list ;)

By the way, your timing was excellent... the original message arrived
here just 1 minute after midnight :)

Kai