Re: audio modulated VTTC

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

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

AM modulation is easy, just put a power transformer in series with the plate
voltage source or put a low voltage transformer in series with the cathode.
Bipass the transformer with a shunt capacitor to prevent RF being sent back
through the transformer. Then feed the transformer with audio. The audio
should be about 1/2 the power of the power tube. an old power transformer
has enough bandwidth for audio. I use the 6v or 12v windings for input and
the 117v or higher winding as the modulator winding.
    Robert  H
  

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 01 Jun 2002 08:49:15 -0600
> To: tesla-at-pupman-dot-com
> Subject: Re: audio modulated  VTTC
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 1 Jun 2002 09:00:44 -0600
> 
> Original poster: "Herwig Roscher by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <herwig.roscher-at-gmx.de>
> 
> 
> Robert Heidlebaugh wrote:
>> I don't understand your problem.
> 
> Robert,
> 
> I'm looking for an audio modulated VTTC circuit, which combines
> the safe selfstarting feature of e.g. an Armstrong oscillator and the
> low distortion of a plasma tweeter. Ok now?
> 
>> I use a streight forward class "C" Hartley oscilator with self
> generated bias, No external bias supply.
> - And what about the AF distortions? How do you modulate your
> tube?
> 
> Cheers,
> 
> Herwig
> 
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