[Amps] Ten-Tec Centurion

[Ian White, G3SEK]

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