Re: question about "lambda" (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 21 Aug 2007 19:56:48 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: question about "lambda" (fwd)

Hi Matthew,

Wavelength is the distanced traveled by a wave in one cycle. Lamda is 
the symbol to represent one complete wavelength (one complete cycle). 
The term wavelength is "distance". Wavelength = velocity / frequency. 
The velocity of a radio wave (air or vacuum) is 186,000 mi/s (speed of 
light). Therefore, a wavelength or lambda in miles = 186,000 / 
frequency. Often however, it's best to use SI units system when dealing 
wavelength. For the speed of light in cm we have 3 x 10^10 cm/s. Lamda 
in cm = 3 x 10^10 / frequency. So for any coil, you can simply find the 
distance traveled by the wave in one cycle by dividing the speed of 
light by the frequency.

The phase angle comes into play with 1/4 wave and 1/2 wave values. At 
1/4 wave, the phase angle is 90 degrees and results in a maximum value 
at one end and a minimum at the other end (the coil). So, at 1/4 wave, 
we have maximum voltage at the top and minimum voltage at the bottom, 
this in turn results in minimum current at the top and maximum current 
at the bottom.

Does that help any? If not, I recommend googling wavelength. Probably 
some good stuff out there. As far as applications, well, their various. 
Note, if it's coil related, our coils are 1/4 wavelength designed for 
the classic 2 coil system, but some also build 1/2 wave coils as well. 
This puts the maximum's at each end of the coil so the coil itself is 
positioned horizontally and usually with a primary center to the coil. 
Obviously for 1/4 wave coils, we mount the coil vertical so the maximum 
voltage end is above everything else.

Take care,
Bart

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Mon, 20 Aug 2007 12:40:41 -0500
>From: Matthew Boddicker <shmerpleton_town@xxxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: question about "lambda" (fwd)
>
>It's Matthew Boddicker.
>
>When you say 1/2 or 1/4 wavelength, 1/2 or 1/4 of what? What would be a full 
>wavlength? I guess a more accurate question would be, what is the fraction 
>compared to?
>
>Thanks,
>Matthew Boddicker
>
>
>  
>
>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>To: tesla@xxxxxxxxxx
>>Subject: Re: question about "lambda" (fwd)
>>Date: Thu, 16 Aug 2007 20:44:34 -0600 (MDT)
>>
>>
>>---------- Forwarded message ----------
>>Date: Thu, 16 Aug 2007 19:33:46 -0700
>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>To: Tesla list <tesla@xxxxxxxxxx>
>>Subject: Re: question about "lambda" (fwd)
>>
>>Hi Matthew,
>>
>>Lambda in the electrical sense is simply wavelength, thus 1/2 wavelength
>>or 1/4 wavelength.
>>
>>Wow, 4 pF? Very low and little energy for spark creation. Your question
>>is very interesting. But, how about some specifications on the coil
>>parameters?
>>
>>Take care,
>>Bart
>>
>>Tesla list wrote:
>>
>>    
>>
>>>---------- Forwarded message ----------
>>>Date: Thu, 16 Aug 2007 14:25:18 -0500
>>>From: Matthew Boddicker <shmerpleton_town@xxxxxxxxxxx>
>>>To: tesla@xxxxxxxxxx
>>>Subject: question about "lambda"
>>>
>>>Hi, this is Matthew Boddicker
>>>It's either a brain-fart or just a lack of reading the right information,
>>>but what exactlty does "1/2 lambda" and "1/4 lambda" mean exactly?
>>>
>>>Also, probably tied into the same subject, I was tuning my coil by moving 
>>>      
>>>
>>an
>>    
>>
>>>alligator clip connecting the wire from the primary coil to the capacitor
>>>      
>>>
>>>from the max inductance down to the minumum. I was getting very little
>>    
>>
>>>sparks at the beginning, even when I had  the primary circuit the same
>>>calculated frequency as the secondary. The capacitor is 4.075 picofarads.
>>>The "tuned" circuit, to match the same frequency of 438 kHz secondary, is
>>>being given an inductance of 32 microhenrys. But at this inductance (a
>>>grounded rod was held 3.5" away from the top load), there was a tiny bit 
>>>      
>>>
>>of
>>    
>>
>>>purple corona. This observation was consistant until I hit an inductance 
>>>      
>>>
>>of
>>    
>>
>>>11microhenrys when many sparks broke out between the top load and the
>>>grounded object. This frequency for the primary is calculated at 752kHz.
>>>That's over 300kHz off! why does that work!?!?!
>>>
>>>Thanks,
>>>Matthew Boddicker
>>>
>>>_________________________________________________________________
>>>Tease your brain--play Clink! Win cool prizes!
>>>http://club.live.com/clink.aspx?icid=clink_hotmailtextlink2
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>      
>>>
>>
>>    
>>
>
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