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Re: 1/4 wave TC (fwd)
---------- Forwarded message ----------
Date: Wed, 25 Jul 2007 18:14:58 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 1/4 wave TC (fwd)
The correct word is "without" a toroid.
Resonance Research Corp.
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
Sent: Wednesday, July 25, 2007 4:32 PM
Subject: Re: 1/4 wave TC (fwd)
> ---------- Forwarded message ----------
> Date: Wed, 25 Jul 2007 16:16:53 -0500
> From: resonance <resonance@xxxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: 1/4 wave TC (fwd)
> Run your data on JAVATC and you will get nearly the exact tuning tap
> point --- might vary at most 1/8th turn.
> Never run your coil with a toroid or some type of topload. Without
> equalized electrostatic field shaping down the secondary the coil usually
> tries to run at multiple frequencies, ie, some of the harmonics are not
> surpressed enough, and your coil will usually quickly be destroyed.
> If your safety gap is firing at 140 volts, something is wrong with your
> tuning. JAVATC will solve it for you.
> Dr. Resonance
> Resonance Research Corp.
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Wednesday, July 25, 2007 1:21 PM
> Subject: 1/4 wave TC (fwd)
>> ---------- Forwarded message ----------
>> Date: Wed, 25 Jul 2007 12:21:32 -0400
>> From: Skip Greiner <skipg@xxxxxxxxxxxxxxx>
>> To: Tesla list <tesla@xxxxxxxxxx>
>> Subject: 1/4 wave TC
>> Hi All
>> Well after my capacitor literally exploded and destroyed both the
>> primary and secondary of the first 1/4 wave TC, a new one has been built
>> and is in test. The specs are:
>> Primary: 7 turns, 1/4" tubing, 19" in diameter
>> Secondary: 390 turns #22ga, 0.050" overall diameter insulated wire, 14"
>> diameter, winding len:19.5", frequency len of wire: 217khz, wire length
>> Measured Resonance of secondary is 210 khz. no excitation
>> With 5 x 20 toroid: 205khz
>> With two 5 x 20 toroid: 150 khz
>> Driver: 9kv x 120ma NST
>> Break: SRSG with 2 poles
>> Cap: .027
>> Some of the test results:
>> Variac set no higher than 40 or about 50 volts input
>> Spark length:
>> No toroid: multiple 12" (+) arcs from top turn of sec
>> One toroid: 20" (+) from breakout point
>> Two toroid: 27" (+) from breakout point
>> Operating freq: with toroids: 140khz
>> Operating freq: without toroids: 190khz
>> Note that the wire length frequency and the operating frequency with no
>> top load under power are pretty close. I am trying to figure out how to
>> concentrate the discharges into a single streamer without a top load. I
>> seem to be processing a large amount of power and the total amount of
>> sparks with or without a top load seems to be similar.
>> Above the "40" setting of the variac the NST safety gaps really fire
>> nearly all of the time and so far I am afraid to open up the gaps which
>> are set to about 0.125". Does anyone have a comment as to the maximum
>> safety gap opening that I might use on a 9kv NST? It looks like this
>> thing will really perform at higher inputs but I do not want to risk the
>> NST yet.