Re: All who know VTTC stuff ;-). (fwd)

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

Original poster: Kreso Bukvic <kreso.bukvic-at-kc.htnet.hr> 

Im really sory. The shematics will be on my server soon, but here are the
"specs", i remowed the feedback winding because i will rebuild this coil i
think it was a crap.

Secondary
Diameter: 70 mm
Winding: 1000 turns of 0.4 mm wire

Primary
22 turns of 1 mm wire

Feedback
24 turns of 0.63 mm wire

Tube - QB 3.5 - 750 tetrode
Tube used as triode ( screen and grid connected together)

Filament transformer 5 V 30 A ( it has writing " Property of coherent
radiation laboratories California - anybody ever hear for them?)

PSU
Mot with shunts, 2 uF cap and a diode affocurse
Power controled by variac and evrything has a relay startup and imeditate
stop button
Diode protection capacitor 16 kV 1600 pF

Main primary capacitors

200 pF 20 kV
400 pF 16 kV

in parallel for 600 pF

Topload copper pipe oldered arround copper circle and a insulator on top (
very small toroid)

It has a anode current meter too, at biggest sparks anode current was almost
300 mA.

This is what im seeking now

Im going to rebuild the coil on a new wodden platform, i guess my primary
and feedback were BS.

By reading the Steves site im plaining to use 0.4 mm wire for feedback and 2
mm wire for primary? What do you think?

Well write as much you can and as much you want :-).

Best regards

Kreso Bukvic
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-poodle.pupman-dot-com.rmpg-dot-org>
Sent: Monday, July 19, 2004 12:38 AM
Subject: Re: All who know VTTC stuff ;-). (fwd)


 > Original poster: Tesla List Moderator <mod1-at-poodle.pupman-dot-com>
 >
 >
 >
 > ---------- Forwarded message ----------
 > Date: Sat, 17 Jul 2004 01:17:42 EDT
 > From: FutureT-at-aol-dot-com
 > To: tesla-at-pupman-dot-com
 > Subject: Re: All who know VTTC stuff ;-).
 >
 > In a message dated 7/16/04 9:21:09 PM Eastern Daylight Time,
tesla-at-pupman-dot-com
 > writes:
 >
 > Kreso,
 >
 > It helps only in the sense that it tells us that your coil was able
 > to benefit from such optimization.  We could perhaps make an
 > intuitive leap and suggest that further optimization may be possible.
 > Such a leap is made with some uncertainty.
 >
 > If one wishes to get others' opinions about the setup and adjustment
 > status of one's coil, it is traditional (and sensible as well) to post all
 > the parameters in some form, either on this list or at a website.
 > Surely those who work often with the tuning programs may offer
 > suggestions about the tune point, and those who have built similar
 > coils will be able to comment on the spacings, cap values, etc.
 > Those with general tube coil knowledge will perhaps offer an opinion.
 > Often the sum of such comments proves useful.  There may sometimes
 > be a feeling of satisfaction in launching one's coil's specifications out
 > into the wonderland of the internet.  Comments about the construction
 > of the tube (sheet metal or graphite plate, triode, tetrode, etc) are
 > helpful.  Comments about the redness of the plate during operation
 > (if it is red) are helpful.  Comments about the particular sound of
 > the coil; steady, raspy, loud, hissing, whooping, etc are helpful and
 > interesting to the readers.  Comments about the appearance of the
 > sparks is helpful; fuzzy, crazed, straight, swordlike, spiky, etc.
 > I remember you said they are not swordlike.  One should be a
 > careful observer in this sense.
 >
 > John
 >
 >
 >
 > > New information
 > >
 > > When i raise the primary and feedback for 0.5 cm i get 4 cm on spark
length.
 > >
 > > Raising it even more does not help.
 > >
 > > Does this info help?
 > >
 > > Best regards
 > >
 > > Kreso Bukvic
 > >
 > >
 > >
 >
 >
 >
 >
 >