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Old and new Tesla coil (help!)

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LAN_403

radiotech

Fri Jun 04 2010, 05:50PM

Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546

You could try connecting the PL-105 in series with the primary of a MOT 110 volt primary line H-> filament topcap-> mot primary L
mot primary N -> line N (do hang a beefy MOV across your line input on the other side of a 10 amp-oven fuse.

Try pulsing it with a 500 ohm resistor between anode and side cap by scraping a series wire across a rough file.

See if the spark gap you use on mot secondary shows crackly jumps.

For the experiment you can hest the tube with a 6 volt storage battery.

Do wear glasses lest the uv from tube gets you.

This history of thyratron motor control is interesting. Westinghouse had the Rototrol trying to compete with GE's sweetheart, the amplidine.

Patric

Fri Jun 04 2010, 06:03PM

Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255

Thank you all! First I will finish this Tesla, next week I think!

Then about the PL105, the max frequency is 150 Hz, can a Tesla work at that frequency? I think yes, but then it is not called a Tesla transformer any more!

I also have a Philips TB 3/750, somebody knows that?

Mads Barnkob

Fri Jun 04 2010, 06:17PM

Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968

Patric wrote ...

Thank you all! First I will finish this Tesla, next week I think!

Then about the PL105, the max frequency is 150 Hz, can a Tesla work at that frequency? I think yes, but then it is not called a Tesla transformer any more!

I also have a Philips TB 3/750, somebody knows that?

The TB3/750 is a good tube for a medium VTTC, with 300W plate dissipation its a beauty :)

radiotech

Fri Jun 04 2010, 07:08PM

Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546

I think yes, but then it is not called a Tesla transformer any more"

Oudin coils work on 50 Hz and produce a nice brush discharge
which works great for seeking leakage points in high voltage motors without destroying anything.

Tesla had a bad name, since he allowed the US Navy to swipe
Marconi's patents which held fast in the 'civilized world'.

803

Fri Jun 04 2010, 07:24PM

Registered Member #2807 Joined: Fri Apr 16 2010, 08:10PM
Location:
Posts: 191

Herr Zap,

Sorry all. I said the wrong thing. I'm sorry for sometimes giving wrong info. I will shape up as soon as I can.
Here is the link to the hard on/off theory

I'm so sorry, will you forgive me?B-)
From,

Paul

(thank you Steve. At lest some one is optimistic here)

Proud Mary

Fri Jun 04 2010, 09:03PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

803 wrote ...

The 803 can have a kilowatt input because it is all ways hard on or off.

With rise time of zero?

803 wrote ...

Because of this the plate is disapating like around 500 watts every other voltage input.

Let me get this straight. The input power is 1KW, of which 1kW is dissipated as heat in the anode, or just 500W dissipated as heat? What's left over from such astonishing inefficiency to make your 16 inch spark?

803 wrote ...

Also because of it's low restience and very close plate to the cathode the electrons are slower than let's say a 811a.

Less transit time than 811A because of slower electrons, eh?

803 wrote ...

So 1 kilowatt= 16 inch

My advice: lay off of that purple drank and sort out yo head, bro, cos all this is jus equine excrement, my man.

Why not spend a few years of careful book study, learning how to apply the many formulae describing and predicting the behaviour of thermionic valves, instead of picking up gobbets of undigested chatter from other websites and re-heating it all here, to the embarassment of everyone but yourself?

Why don't you go off and build your 803 Tesla thang, and then come back and prove us all wrong when you have it up and running, sixteen inch sparks and all?

Herr Zapp

Fri Jun 04 2010, 10:47PM

Registered Member #480 Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644

803 -

I think you may have blindly accepted ridiculously exaggerated claims, and don't seem to be willing to do the research required to see if these claims are even remotely rational.

Why not finish your 803-based VTTC, and post some photos of this coil in operation, especially the length of the output sparks and the color of the plate while the tube is processing 1KW (or more) of RF power.

Be ready to snap that photo VERY quickly after you turn on the power.

Herr Zapp

803

Sat Jun 05 2010, 03:50AM

Registered Member #2807 Joined: Fri Apr 16 2010, 08:10PM
Location:
Posts: 191

Herr,

I'm tired of trying to prove my ideas are resonable. I trust these people and it has been conformed by the tcml. So please stop trying to tell me i'm wrong and lets be friendly

Thanks,

Paul

Herr Zapp

Sat Jun 05 2010, 04:15AM

Registered Member #480 Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644

803 -

Please understand that no one here is being "unfriendly".

People are trying to tell you that you can't take unsubstantiated claims as gospel truth. Did anyone who told you that an 803 powered VTTC could generate 16" discharge provide any PROOF to back their claims? I'll bet that no proof was offered.

Do a little Googling, or peruse YouTube, and you will find dozens of VTTCs documented with all the technical details, and with photographs of the coil's typical performance. Take a look at what types of tubes are required to achieve consistent 16" output, and what level of input power is required to achieve this performance.

Again, rather than arguing, just build your coil, and post your results here. Anyone who doubted your claims about the ability of an 803 powered VTTC to generate 16" arcs will be proven wrong. Conversely, ...........

Herr Zapp

radiotech

Sat Jun 05 2010, 06:07AM

Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546

"And there were other Americanisms like micromicrofarads (spelled mmf or ÂµÂµf at random) instead of pF, and a strange allergy to nanofarads."

darn it. Just when I was getting comfortable with terms Jars and Mics

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