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Re: Tube TC

Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

Hi,

Yes there appears to be a few peculiarities with the circuit. No voltage to
the lower tube, strange grid drive configuration, feedback form the
secondary and how does it work in class C with a series tank circuit with no
freewheeling path for the anode current? I bit like running igbts without
freewheel diodes on a series resonate primary. Perhaps the tank circuit has
a missing parallel C or it was it was intended to operate in class A.

An observation of the losses in the tank L. In general center tapped push
pull windings are less efficient  for a given weight of copper  because the
rms current is higher for a given average current. This is similar to a
center tapped mains transformer using two diodes i.e. only half the copper
is being used only half of the time. With a tuned circuit I suspect for a
given power and weight of copper there would be no difference.


Robert (R. A.) Jones
A1 Accounting, Inc., Fl
407 649 6400
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, October 13, 2005 9:10 PM
Subject: RE: Tube TC


> Original poster: Sparktron01@xxxxxxxxxxx
>
> Hi Malcolm,
>
> http://hot-streamer.com/temp/C-027.pdf
>
> Try the Google search, the URL is long and if it is truncated
> you may go places that aren't expected...  ;^)
>
> That is an excellent paper and shows how a high power
> (>5kW) VTTC power system  _should_  be built.  Save the PDF
> to your hard drive, it is a good reference.
>
> Best Regards
> Dave Sharpe, TCBOR/HEAS
> Chesterfield, VA. USA
>
>
>
>
>  > Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
>  >
>  > Hi Dave,
>  >
>  >  >
http://www.veccal.ernet.in/~vecpage/inpac2005/CD/Contributory%20paper/
>  >  > C-027.pdf
>  >  >
>  >  > NOTES
>  >  > I.  There is a schematic error in the above URL, can anyone catch
>  >  > it??? (and it is
>  >  >       NOT minor...  :^D )
>  >
>  > Even the url doesn't seem to be working ;)
>  >
>  > Malcolm
>  >
>  >
>
>