Re: [Amps] Ten-Tec Centurion

["Ian White, G3SEK" <G3SEK@ifwtech.co.uk>]

R. Measures wrote:
> > when the input relay is closed but the output contacts are not. The 
> > PA  then has full drive but no load, which could lead to very high 
> > voltages across the tank components.
>
> Ian --  Would not the Load-C be likely to arc with no load?

Not in general. In the unloaded case, C1 and C2 of the pi-tank form a 
capacitive divider across L. Since the capacitance of C2 is always much 
higher than C1, the RF voltage across C2 will be lower.

> > All of that can happen without any kind of oscillation, either at the 
> > signal frequency or parasitically at VHF.
>
> Agreed.

Good heavens above!  :-))


--
73 from Ian G3SEK         'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek
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