Re: Secondary Voltage Measurement with CRO

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

Original poster: "Steve Cook by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Steve-at-g8cyerichmond.freeserve.co.uk>

Also have you any radio amateurs nearby, 3.5-3.8MHz is a very popular
amateur band. Indeed the colour TV crystals are used by many amateur
operators in xtal controlled transmitters (they tune them a few tens of KHz
either side of this frequency.
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, December 29, 2000 6:30 AM
Subject: Re: Secondary Voltage Measurement with CRO


> Original poster: "Jon Tebbs by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<jgtebbs-at-eos-dot-net>
>
> Hi Ted,
>
> file://lurk mode off//
>
> On the issue of a very strong 3.5MHz RF component, let me ask a question
> that may shed some light: What is the frequency of your color television
> chroma subcarrier in NZ?
>
> In the US it is 3.58MHz, just might possibly explain your anomaly...
>
> Tesla list wrote:
> >
> > Original poster: "tesla by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <tesla-at-paradise-dot-net.nz>
> >
> > Team
> > Read Terry F's paper on sensing and recording secondary voltage
waveforms.
> >
> > Tried same with less formal antenna ie scope probe and small piece of
foil
> > to capacitively couple at a distance of some 5 metres. (Frequency
response
> > issues accepted)
> >
> > Found very strong RF component at 3.5Mhz. Was supprised to see this as
Fo is
> > 95kHz. This 95kHz component was hard to find.
> >
> > Reason  for experiment was to estimate  pri/sec coupling by inspection
of
> > notch period.
> > Have others found same result seeing only components well above Fo ??
> >
> > Tnx to all and to Terry for his work
> >
> > Rgds
> > Ted L
> > NZ
>
> Best wishes to all for the New Year,
> --
> Jon G. Tebbs
> <jgtebbs-at-eos-dot-net>
>
>
>