Re: audio modulated SSTC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: herwig.roscher-at-gmx.de 


Antonio Carlos M. de Queiroz <acmq-at-compuland-dot-com.br> wrote:

 > - The high Q tank takes many cycles to change the amplitude of
 > its oscillations significantly. The amplitude may be proportional to
 > the average voltage of the power supply, but the envelope of the
 > oscillation may not follow the modulation with enough speed.

Antonio,

So one has to distinguish three different cases:

1. Class C oscillators like VTTCs (to stay on-topic) are suitable, as
the amplitude does not change.

2. Class C telegraphy amplifiers are suitable also, because the
amplitude (dots/dashes) changes relatively slow.

3. Class C telephony amplifiers are unsuitable, because the amplitude
changes too quickly and there is also the stabilisation problem, you
described.

Are the a.m. statements correct?
Thank you for sharing your knowledge.

Cheers,

Herwig