[AMPS] Shorted Pi-Networks Turns revisited

[i4jmy@iol.it]

The eventual arcing troubles you mention with switches that do not 
progressively short unused coil portions are caused by unwanted 
resonances, similarly to what happens with some plate chokes at 
critical frequencies.
Resonances of unused portions of Pi coils depends by peculiar factors 
like the coil parasitic capacitance to metal walls, capacitance between 
windings and other specific occurrences.
The same consideration is obviously valid also for Pi-L networks.
Step up ratio has therefore little to do with this kind of arcing and a 
Pi-L compared to Pi as no disadvantages/advantages in the specific 
matter.

73,
Mauri I4JMY


> ---------- Initial message -----------
> 
> From    : owner-amps@contesting.com
> To      : "AMPS" <amps@contesting.com>
> Cc      : 
> Date    : Wed, 13 Sep 2000 13:54:18 +0200
> Subject : [AMPS] Shorted Pi-Networks Turns revisited

>Inductance of L1 in Pi-L is about twice
> the L in Pi - therefore less volts per turn then in L in Pi, which 
led me
> to conclusion that non-shorting band switch combined with  Pi tank is
> more prone to arcs then when combined with Pi-L.
>     Am I wrong or not? Enlighten me please.
> 
> Sasha YZ6X
> 
> 
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> 


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