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>

No, It dosent mean you can't. what it means it is dificult to get hi-quality
audio transmission with out distortion. In a TC you are working on
madulation of high voltage not high quality transmission of high qualitly
audio modulated am broadcast signal quality. If you want HI_FI go to a
linier amp If you want modulated hi-voltage you can slide quality for
quantity. You must select what you are working toward. If you want broadcast
quality standards get out of the TC field and work in amature broadcast.
The reason for suggesting power transformers was to avoid current
saturation. Low power grid signal transformers will saturate. Power
transformers dont have the audio band width. but they will take the current
of a high power circuit again what is your goal. a military 50-1600 Hz power
transformer has a high frequency band width, but that is not run of the mill
components. Again keep your goles in focus. what are you looking for, TC or
broadcast?  Hi-Q solid state low end circuits to drive a linier amp is
common very day amature broadcast electronics. TC is a different world.
   Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Tue, 04 Jun 2002 08:00:37 -0600
> To: tesla-at-pupman-dot-com
> Subject: Re: audio modulated  VTTC
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Tue, 4 Jun 2002 08:15:45 -0600
> 
> Original poster: "Herwig Roscher by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <herwig.roscher-at-gmx.de>
> 
> 
> Robert Heidlebaugh wrote:
> The grid circuit is different.
> 
> Robert,
> 
> Thank you for your advice and hints. I've tried several modifications, but
> never 
> managed to get a low distortion signal. I suspect the peak grid current to
> drive the iron 
> core of the AF transformer into saturation.
> 
>> Get an old copy of radio amatures handbook for actual schematics all
> ready designed for you.
> I was looking for an old copy (with tube driven oscillators and PAs) at the
> recent 
> hamfest, but invane.
> 
> Many sources explicitly state, that a Class C PA with tank circuit or
> Collins filter is not
> suitable for transmission of AM and SSB because of its unacceptable
> intermodulation 
> products. Linear PAs are used therefore. Does this mean, that there is no
> way to a high 
> quality modulation using Class C ?
> 
> Cheers,
> 
> Herwig
> ---------------------------------------
> Greed is the root of all evil!
> ---------------------------------------
> 
> 
>