[TCML] Q

[Barton B. Anderson]

Hello Jared,

Jared Dwarshuis wrote:
> You get higher Q in both the secondary and primary by diminishing coupling.
> When coupling is small there is less frequency splitting and Q rises.
>   
Yes, but the change in Q is small with large changes in coupling. But, 
you are of course correct in your statement.
> You can also get higher Q by operating the secondary at its characteristic
> resonant frequency ( the wire length frequency)
>   
Yes, your will. But why? Answer =  because at resonance, reactance 
cancels (fewer losses).
> Smaller top end capacitance will also increase the Q of the secondary, but
> unfortunately will give a poor impedance match with less power output.
I agree. Larger top loads will decrease Q of secondary. Reason is not 
the AC resistance (it gets lower as the frequency lowers), but due to 
the L/C situation.
> One wants the Q of the entire system to be low. This means that your energy
> is being dissipated as sparks.
>   
I don't fully agree here (but I understand what you are thinking) and my 
reasoning is partially my experience. Higher Q secondary's have got me 
longer sparks. But even with this, there is a balance of top load 
storage. When it comes down to spark production, Q is not the only 
product to consider. Larger top loads have greater storage capacity, but 
the secondary (stand alone with higher Q) will get the energy to the top 
load faster. If the top load is too small, it can only store so much 
energy. But if it's larger, it can store more energy. Higher Q 
secondary's simply help get the power into the top load with fewer 
losses in the transfer, but at a reduced voltage.

Take care,
Bart

> Jared Dwarshuis
> On Dec 2, 2007 8:52 PM, nnanred1 at netzero.net <nnanred1 at netzero.net> wrote:
>
>   
>> hi,
>> yes it does effect the number of cycles.  if ur loseing a lot of energy
>> each cycle the circuit will quickly wind down.  in the limit the circuit is
>> "dead beat."
>>  by now,
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