On Sat, 12 Feb 2005 13:32:43 GMT, "Highland Ham"
wrote:


Indeed a single transistor 'double Tee' phase shift oscillator with a single
chip audio amp ,if you wish to use a loudspeaker , + a key is all you need
to learn /practice morse code.

Any method of locally generating the Morse characters are OK for
learning the Morse code.

It is a popular 'very simple project' candidates for the UK Intermediate
Licence can choose to do .
At the moment candidates for this AR licence have to construct something
simple in order to be assessed for basic construction/soldering skills.

According to the ITU-R recommendations, including the third harmonic
(for non-fading circuits) or even the 5th harmonic (for non-fading
circuits) is enough. For 12 WPM, this would translate to 30 or 50 Hz
bandwidth.

Why should any CW enthusiasts be encouraged to use any emissions
broader than this ?

Paul OH3LWR